Article
Materials Science, Multidisciplinary
Qingjuan Wang, Xinlong Ren, Lei Wang, Tianrong Yan, Kuaishe Wang, Bofan Xu
Summary: The Cu-Ti-Fe alloy exhibits a preference for dynamic recrystallization (DRX) at high temperatures and low-strain rates. The microstructure evolution characteristics of the alloy under high-temperature conditions are described, elucidating the DRX mechanism.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Ding-ge Fan, Kun-kun Deng, Cui-ju Wang, Kai-bo Nie, Quan-xin Shi, Wei Liang
Summary: The addition of trace SiCp reduces the activation energy of the Mg-5Zn alloy, and the optimal deformation conditions were determined based on the processing map. The study also looked at the influence of PDZ size on the activation energy, as well as the effect of SiCp on the dynamic recrystallization behavior.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
Deqing Ma, Shuai Yuan, Shiyu Luan, Peipeng Jin, Hengrui Hu, Jinhui Wang, Xiaoqiang Li
Summary: The hot deformation behavior of as-cast Mg-2Zn-0.5Mn-0.2Ca alloys was investigated by hot compression tests. The flow stress was found to increase with higher strain rates and lower temperatures. A constitutive equation was obtained, and the average activation energy was calculated. A processing map was developed, and the optimal processing parameters were determined. The microstructural analysis revealed significant differences between instability areas and stable areas, although both had a similar texture. The slip system in deformed grains was determined, and the main dynamic recrystallization mechanism was identified as discontinuous dynamic recrystallization (DDRX). The proportion of DRX increased with lower strain rates and higher deformation temperatures, weakening the texture strength.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Jie Mi, Deqing Ma, Shiyu Luan, Peipeng Jin, Lijia Chen, Xin Che, Xiaoqiang Li
Summary: The microstructure and texture evolutions of the Mg-2Zn-0.5Mn-0.2Ca-0.3Nd-0.7La alloy during hot compression tests were investigated. The thermal deformation behavior of the alloy followed a hyperbolic sine function relationship, and a thermal processing map was constructed based on a dynamic material model. The alloy exhibited discontinuous dynamic recrystallization (DDRX) mechanism, with extension twins forming a new texture.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Physical
Lei Zhang, Shuai Yuan, Jinhui Wang, Lijia Chen, Peipeng Jin
Summary: This study investigated the effect of deformation temperature and strain rate on the hot deformation mechanism of an as-cast Mg-5Al-0.6Sc alloy. The results showed that the flow stress decreased with increasing temperature and decreasing strain rate. A constitutive equation was established to accurately predict the hot deformation behavior of the alloy. The optimal processing area was determined based on processing maps, and the microstructure evolution and dynamic recrystallization mechanism of the alloy were analyzed.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Yuhang Guo, Yibo Dai, Pan Chen, Qianhao Zang, Zhenya Zhang
Summary: In this study, Mg-3Sn-2Al-1Zn-0.6Nd alloys were prepared and their hot deformation behavior and recrystallization mechanisms were investigated. The results showed that the alloys had a high power dissipation efficiency within specific temperature and strain rate ranges, and fine dynamic recrystallization grains and deformed twinning were formed after hot deformation.
Article
Materials Science, Multidisciplinary
Chang-Hee Cho, Dal-Oh Kim, Kwangtae Son, Hyun-Soon Park
Summary: Al-Zn-Mg-Cu alloys exhibit the best mechanical properties among aluminum alloys, but suffer from poor formability during metalworking processes. This study investigates the high-temperature deformation behavior and mechanisms of an Al-Zn-Mg-Cu alloy, highlighting flow instabilities at higher strain rates and cooler temperatures, reduced recrystallization, diminished power dissipation efficiencies, and notable alpha-fiber generation.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Metallurgy & Metallurgical Engineering
Hengrui Hu, Jiayu Qin, Yunpeng Zhu, Jinhui Wang, Xiaoqiang Li, Peipeng Jin
Summary: In this study, the hot deformation behavior, microstructure evolution, and dynamic recrystallization (DRX) mechanism of fine-grained GNPs/Mg composite were investigated. The results showed that the high stress exponent and activation energy of the composite were due to the fine grain size and absence of Zener pinning and Orowan effects. The hot compression tests also revealed the formation of a random and weak texture after hot compression, as well as the presence of both discontinuous and continuous dynamic recrystallization mechanisms.
ACTA METALLURGICA SINICA-ENGLISH LETTERS
(2023)
Article
Metallurgy & Metallurgical Engineering
Bhomik Ketari Deogade, Nitish Bibhanshu, Rajib Kalsar, Swati Ghosh Acharyya, K. S. Suresh
Summary: The addition of Ce to Mg improves its restricted ductility due to an inadequate number of deformation systems in the hcp structure. Hot compression tests were conducted on Mg-0.5wt% Ce alloy to determine the suitable deformation regime using processing maps. The developed constitutive equation based on hyperbolic-sinusoidal Arrhenius-type equations and Zener-Hollomon parameter showed reasonable predictions of the modified flow stress. The processing map identified a dynamic recovery domain at 673-723 K and 0.001-0.1 s(-1), indicating the suitable hot working regime, as well as unstable zones of flow stress behavior.
TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS
(2023)
Article
Materials Science, Multidisciplinary
Daoguang He, Han Xie, Y. C. Lin, Xin-Tao Yan, Zhengbing Xu, Gang Xiao
Summary: The high-temperature flow features of the Al Zn Mg Cu Zr aluminum alloy were investigated through hot compression tests. The evolution mechanisms of dislocation clusters, subgrain, and dynamic recrystallization (DRX) grains were thoroughly explored. It was found that high strain rate promotes the formation of dislocation clusters and subgrain nucleation/accumulation, leading to an increase in flow stress; however, at higher temperatures, the noticeable annihilation of substructures and the growth of DRX grains result in a decrease in flow stress. Three types of DRX nucleating mechanisms are activated during hot compression. The physically based (PB) model accurately predicts the true stresses and microstructure evolution features of the alloy.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Physical
Jiebo Lu, Wenjie Xin, Tengfei Ma, Xiaohong Wang, Duo Dong, Dongdong Zhu
Summary: The microstructural evolution and dynamic recrystallization behavior of a dual-phase medium entropy alloy were studied under different temperature and strain rate conditions. The initial dual-phase microstructures were characterized and the deformation activation energy was calculated. The appropriate hot deformation parameters were determined based on the hot processing map and deformation microstructure. It was also found that the continuity of dynamic recrystallization depended on the deformation temperature.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Guo -lei Liu, Zhi-yong You, Wei -li Cheng, Lin Luo, Hui Yu, Li -fei Wang, Hang Li, Ze-qin Cui, Jin -hui Wang
Summary: This study investigates the dynamic recrystallization mechanism and hot deformation behavior of the Mg-0.5Bi-0.5Sn-0.5Mn alloy. The results show a strong correlation and suggest that cross-slip is the primary deformation mechanism. The processing maps indicate the most suitable processing conditions, and the occurrence of continuous and discontinuous dynamic recrystallization under different deformation conditions is observed.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Physical
B. Ebrahimpourghandi, R. Mahmudi
Summary: The hot deformation behavior and constitutive analysis of the as-cast and extruded Mg-2.5Gd-0.5Zr alloy were compared using the shear punch testing (SPT) method. The results showed that grain boundary sliding was the prevailing deformation mechanism. The efficiency of power dissipation exceeded 30% in most areas for both cast and wrought conditions.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Yechen Deng, Yixin An, Yangzhihong Xiao, Xiaodong Zhan, Xiaoyong Zhang, Bingfeng Wang
Summary: Controlling the hot deformation mechanism and avoiding deformation instability are crucial in hot forging of titanium alloy. A high throughput experimental method was used to efficiently establish a deformation mechanism map by deforming double-cone specimens. The results showed a continuously varying strain distribution from 0.3 to 1.4, with dynamic recovery and dynamic recrystallization as the dominant deformation mechanisms. The formation of deformation bands and the aggravation of microstructural nonuniformity within the Ti-55511 titanium alloy were identified as leading to deformation instability.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Jun Cai, Lin Chen, Peng Han, Juan Yang, Qingxiang Yang, Qingyang Li, Ben Ding, Ke Qiao, Jiang Li, Qian Zhao, Wen Wang, Kuaishe Wang
Summary: The hot deformation behavior of Mg-9.16Gd-3.03Y-1.44Zn-0.61Zr alloy was investigated through hot compression experiments, optical microscopy, electron back-scatter diffraction, and transmission electron microscopy. The results revealed that the alloy exhibited dynamic recrystallization under high temperature and strain rate conditions, and the volume fraction of dynamic recrystallization grains was influenced by temperature and strain rate.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Physical
Shengli Liang, Yunzhang Li, Yi Zhang, Meng Zhou, Shuang Liu, Xu Li, Yongfeng Geng, Baohong Tian, Yanlin Jia, Yong Liu, Alex A. Volinsky
Summary: The interface structure of Cu30Cr0.2Zr electrical contacts was modified using CeO2/GO to improve mechanical properties and arc erosion resistance. The addition of CeO2/GO enhanced the tensile strength, ductility, and electrical conductivity of the composites. It also reduced the concentrated erosion of the arc, improved welding resistance, and prolonged the electrode's service life.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Polymer Science
Alexander P. Kondratov, Anastasiya V. Lozitskaya, Vyacheslav N. Samokhin, Alex A. Volinsky
Summary: This study investigates the possibility of producing strain gauges with high sensitivity to mechanical stress using hard elastic films of isotactic polypropylene. The films exhibit thixotropic polymer softening during cyclic deformation (Patrikeev-Mullins effect) and the dry crazing effect. Three methods for preparing rigid elastic films using isotactic polypropylene are proposed, involving the deposition of an adhesive layer and an electrically conductive layer. The optimal manufacturing process for electrical sensors with high sensitivity is determined, including pre-cyclic deformation to form open micropores. A mathematical model is developed to predict the mechanical stress and/or the change in mechanical stress of the strain gauges based on the electrical resistance change in the conductive layer, with up to 700 relative strain sensitivity in the range of 6-35% strain.
JOURNAL OF POLYMER RESEARCH
(2023)
Article
Engineering, Manufacturing
Ekaterina S. Marchenko, Yuri F. Yasenchuk, Oibek Mamazakirov, Anatoly A. Klopotov, Gulsharat A. Baigonakova, Alex A. Volinsky, Sergey V. Gunter
Summary: Porous NiTi alloys with improved mechanical properties were obtained by self-propagating high-temperature synthesis (SHS) method in a closed reactor, using layer-by-layer combustion under a protective argon atmosphere. The maximum compressive strain of the porous NiTi alloys synthesized in the closed reactor was 34%, compared to 7% in the open gas flow reactor. The reaction products in the two-phase gas zone of peritectic crystallization were isolated Ti2Ni crystalline clusters in the TiNi matrix, as confirmed by X-ray diffraction, differential scanning calorimetry, scanning electron microscopy, energy dispersive spectroscopy, and optical microscopy.
MATERIALS AND MANUFACTURING PROCESSES
(2023)
Review
Materials Science, Multidisciplinary
Deye Xu, Meng Zhou, Yi Zhang, Shunlong Tang, Zhiyang Zhang, Yong Liu, Baohong Tian, Xu Li, Yanlin Jia, Alex A. Volinsky, De Li, Qiujie Liu
Summary: The effects of Y addition on microstructure evolution in Cu-Sn-Ni-Zn-Ti alloys during hot deformation were investigated. Hot deformation experiments were conducted using a Gleeble-1500 simulator, deforming Cu-Sn-Ni-Zn-Ti and Cu-Sn-Ni-Zn-Ti-Y alloys at temperatures ranging from 550 to 950 degrees C and strain rates of 0.001-10 s-1. Constitutive equations were constructed and the hot deformation activation energy of the two alloys was calculated. It was found that the addition of 0.1 wt% rare earth Y element can promote dynamic recrystallization based on analysis of true stress-strain curves and electron backscattered diffraction images. Pole figures showed a texture change from {011}(112) Brass texture and {001}(100) Cube texture to {111}(211) R texture after Y addition. The microstructure and precipitates of the Cu-Sn-Ni-Zn-Ti alloy were analyzed, revealing the presence of Cu4Ti precipitates. Continuous dynamic recrystallization and discontinuous dynamic recrystallization were identified as the main recrystallization mechanisms in the Cu-Sn-Ni-Zn-Ti alloy.
MATERIALS CHARACTERIZATION
(2023)
Article
Materials Science, Multidisciplinary
Meng Zhou, Yongfeng Geng, Yi Zhang, Yijie Ban, Xu Li, Yanlin Jia, Shengli Liang, Baohong Tian, Yong Liu, Alex A. Volinsky
Summary: A Cu-Co-Si-Ti-Ce alloy with medium electrical conductivity and excellent mechanical properties was obtained through vacuum melting process. The combination of multiple strengthening techniques resulted in high micro-hardness and strength. Co2Si and Co16Ti6Si7 phases exhibited coherent and semi-coherent interface relationships with the copper matrix, relieving interfacial stress and reducing interface energy. Solid solution strengthening, work-hardening, grain boundary strengthening, and precipitation strengthening contributed significantly to the alloy's strengthening.
MATERIALS CHARACTERIZATION
(2023)
Article
Materials Science, Multidisciplinary
Yunzhang Li, Meng Zhou, Yi Zhang, Hanjing Zhu, Xianhua Zheng, Shengli Liang, Shunlong Tang, Baohong Tian, Yong Liu, Xu Li, Alex A. Volinsky, Chenglin Zheng
Summary: Al2O3-Cu/25Mo5Ta and 0.5Y(2)O(3)/Al2O3-Cu/25Mo5Ta composites were prepared by ball milling and powder metallurgy methods for electrical contact experiments. The addition of Y2O3 had a significant effect on the electrical contact performance, reducing mass loss and improving service life. TEM results showed the generation of nanoscale YTaO4 with excellent thermal stability, positively influencing the electrical contact performance.
Article
Materials Science, Multidisciplinary
Zhiyang Zhang, Meng Zhou, Yi Zhang, Shunlong Tang, Deye Xu, Baohong Tian, Xu Li, Yanlin Jia, Yong Liu, Alex A. Volinsky
Summary: Cu-Ti-Ni-Mg and Cu-Ti-Ni-Mg-Ce alloys were prepared by vacuum induction melting and subjected to hot deformation tests. The true stress-strain curves were obtained and constitutive equations were established. The addition of Ce reduced dislocation density and texture strength, promoted precipitation, and improved the deformation resistance of the alloys. The optimal processing parameters were determined based on the processing maps. The microstructure of the alloys was analyzed using EBSD and TEM, and CuNi2Ti precipitates were found in both alloys, with more in the Cu-Ti-Ni-Mg-Ce alloys.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Materials Science, Biomaterials
Alex A. Volinsky, Oleg V. Kokorev, Ekaterina S. Marchenko, Igor A. Khlusov, Yuri F. Yasenchuk, Alexander N. Monogenov
Summary: Currently, it is relevant to use alternative systems for hepatic metabolism and partial replacement of liver organ failure, especially due to the increase in liver disorders and organ insufficiency for transplantation. Low-cost intracorporeal systems using tissue engineering for hepatic metabolism maintenance before transplantation or complete liver function replacement deserve attention. This study describes the in vivo application of fibrous nickel-titanium scaffolds (FNTS) with cultured hepatocytes, which showed superior liver function and survival in a cirrhosis rats' model compared to hepatocyte injections.
ACS BIOMATERIALS SCIENCE & ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Meng Zhou, Yunzhang Li, Shunlong Tang, Yijie Ban, Yi Zhang, Bin Gan, Xu Li, Lihua Fu, Baohong Tian, Yong Liu, Alex A. Volinsky
Summary: A new Cu-Ni-Si alloy with trace elements of Co and Cr was prepared and studied for its deformation behavior and microstructure transformation during hot compression. The alloy exhibited continuous and discontinuous dynamic recrystallization during deformation, with decreased texture intensity and increased randomness. The degree of recrystallization increased with higher deformation temperature. Additionally, the alloy formed two types of precipitates during hot deformation, which improved its compression resistance.
Article
Materials Science, Multidisciplinary
Ekaterina S. S. Marchenko, Kirill M. M. Dubovikov, Gulsharat A. A. Baigonakova, Ivan I. I. Gordienko, Alex A. A. Volinsky
Summary: Hydroxyapatite coatings were deposited on NiTi substrates using plasma-assisted radio frequency sputtering for different deposition times. Increase in deposition time to 3 hours resulted in formation of a dense hydroxyapatite layer without visible defects. The coating consisted of round grains of different fractions, with the smallest grains observed in the sample deposited for 3 hours. Wettability tests showed that the coating deposited for 3 hours had the highest surface energy, reflected in the proliferation density of the MCF-7 cell line.
Article
Materials Science, Ceramics
Shaoyu Wu, Xiaoqian Xu, Shani Yang, Jingwen Qiu, Alex A. Volinsky, Xiaolu Pang
Summary: In this paper, high-entropy nitride coatings with optimal hardness and elastic modulus combination were successfully obtained using a new material system combined with multi-objective optimization. The effects of elemental content on mechanical properties prediction in this system were visualized using partial dependence heatmaps, which helped to interpret the optimization results and discover unknown mapping relationships.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Lei Li, Xueyan Yan, Bingzheng Yang, Sen Yang, Alex A. Volinsky, Xiaolu Pang
Summary: The thermal stability of AlN substrates coated with active metal was studied using first principles calculations. The results showed good thermal stability of the interface at elevated temperatures, and an orientation dependence of the interface elasticity was found. This study is helpful for the development of novel high-power microelectronic devices.
CHEMICAL PHYSICS LETTERS
(2023)
Article
Polymer Science
Alexander P. Kondratov, Alexander A. Nikolaev, Victor G. Nazarov, Vladislav Y. Vereshchagin, Alex A. Volinsky
Summary: Counterfeiting and falsification of brands and products are global problems that impact the development and distribution of high-tech industrial and food products, as well as world economies. One solution to these problems is the development of original packaging with protection elements and labeling that prevent replication and forgery through printing or other methods. The use of new materials with unique optical properties and constantly evolving packaging manufacturing and labeling technologies is the most reliable way to safeguard against counterfeiting.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Review
Materials Science, Multidisciplinary
Hairui Xing, Ping Hu, Chaojun He, Xiangyang Zhang, Jiayu Han, Fan Yang, Run Bai, Wen Zhang, Kuaishe Wang, Alex A. Volinsky
Summary: This paper reviews the methods of strengthening molybdenum alloys with metal oxides and carbides and their effects on alloy structure and properties, providing guidance for the design of high-performance refractory molybdenum alloys.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Ping Zhang, Xiujie Yue, Yeran Gao, Zhenyong Lin, Shunxiang Wang, Songting Zhang
Summary: This paper investigates the strengthening mechanism of highspeed cutting and solid particle-entrained waterjet peening (HSC-WJP) composite reinforcement on 7075-T6 aluminum alloy. The research results show that composite reinforcement can improve surface quality, reduce surface pits and roughness, and decrease the size of precipitation-free zone (PFZ) at grain boundaries.
Article
Materials Science, Multidisciplinary
Sangyoon Lee, Hwi Yoon, Sanghun Lee, Seung-min Chung, Hyungjun Kim
Summary: The wettability of metal oxides, particularly HfO2 thin films deposited via atomic layer deposition, and its correlation with surface free energy have been studied. It was found that surface oxygen species significantly affect the intrinsic hydrophilicity of HfO2 thin films, and the crystalline orientations also evolve with film thickness.
Article
Materials Science, Multidisciplinary
Changdong Yin, Yiwen Wu, Zhou Xu, Dongdong Ye, Jun Yao, Jianjun Chen, Qiang Liu, Xin Ge, Meiling Ding
Summary: This study proposed a new strategy to indirectly estimate the hydrogen diffusivity of metallic materials under tensile stress by combining the electrochemical hydrogen permeation test (EHPT), the hydrogen diffusion descriptive equation based on Fick's law, and hydrogen pre-charged tensile test. The results showed that the hydrogen permeation curve obtained was highly approximate to the theoretical trend. The hydrogen embrittlement (HE) susceptibility of the specimens increased with increasing stress.
Article
Materials Science, Multidisciplinary
Huan Luo, Wei-yi Wang, Xin Yu, Xian-jun Lei, Lang Liu, Guo-zheng Zha, Wen-long Jiang, Bin Yang, Bao-qiang Xu
Summary: Separating selenium and tellurium is a general challenge in material and non-ferrous metallurgical industries. This paper proposes a novel method that achieved efficient separation of selenium and tellurium using gas-liquid equilibrium phase diagram and valence regulation-vacuum gasification technique.
Article
Materials Science, Multidisciplinary
Fan Zhang, Rong Xin Wang, Aiqin Tian, Fangzhi Li, Jianping Liu, Hui Yang
Summary: Deposition of Pd/Pt/Au three-layer films on p-GaN under high and ultra-high vacuum conditions was studied to investigate the electrical contact properties. Linear I-V curves were observed in samples deposited under ultra-high vacuum conditions, while nonlinear I-V characteristics were obtained in samples deposited under high vacuum conditions. The study also found that the samples deposited under high vacuum conditions had higher amounts of oxygen and Pd oxide. The oxide layer had an additional influence on the electrical characteristics of the Pd/Pt/Au/p-GaN contact.
Article
Materials Science, Multidisciplinary
Hongli Liu, Chengzhe Liu, Ying Sui, Zhongxian Liu, Tiangang Zhang, Zhiqiang Zhang, Shuang Sun, Jianwei Jia
Summary: This study utilized polysiloxane and hafnium carbide to produce Si-N-C-O-Hf hybridized ceramic fibers, and obtained ceramic fibers with hemispherical particles on the surface through electrostatic spinning and pyrolysis. The ceramic fibers exhibited excellent thermal stability, oxidation resistance, and high temperature insulation.
Article
Materials Science, Multidisciplinary
M. Abaker, Nazar Elamin Ahmed, A. Saad, H. F. Khalil, E. M. M. Ibrahim, A. M. Adam
Summary: This paper systematically studied the internal structure and thermoelectric properties of In1-xGaxSb alloys prepared by melting synthesis at 1123 K. The results showed that doping with Ga in the In sites led to a significant increase in the Seebeck coefficient and power factor, while reducing the thermal conductivity. The maximum dimensionless figure of merit was observed at 403 K.
Article
Materials Science, Multidisciplinary
Fucheng Yu, Jinlong Ren, Jielin Zhang, Haiyang Chen, Xin Tian, Chenchen Feng, Cuixia Li, Jianbin Zhang, Xianxi Tang, Xiaogang Hou
Summary: An environmentally friendly ZnO@BiVO4 composite photocatalyst was prepared using in-situ self-assembly and solvothermal methods, demonstrating good photocatalytic performance. The mass ratio of BiVO4 and NCZ was found to influence the photocatalytic performance of the composite.
Article
Materials Science, Multidisciplinary
Yaoming Shao, Pingping Zheng, Tianhao Dong, Lianghuan Wei, Haifei Wu, Jianxiao Si
Summary: In this paper, Mg3Bi2 films were prepared on glass substrate using magnetron sputtering, and the phase composition and thermoelectric properties of the films were investigated with different atomic ratios. The films displayed a metastable cubic phase and high conductivity when the atomic ratio exceeded stoichiometry.
Article
Materials Science, Multidisciplinary
I. V. Uimanov, D. L. Shmelev, S. A. Barengolts
Summary: A two-dimensional axisymmetric model has been developed to study the prebreakdown processes in a cathode microprotrusion under an external electric field. The simulation results show that electrohydrodynamic instability leads to the formation of a nanometer-sized conical protrusion on the microprotrusion tip, significantly accelerating the heating process.
Article
Materials Science, Multidisciplinary
Weilun Zhang, Di Yang, Feng Gong, Yongjun Chen, Tian Chen, Zhiwen Xie, Sirui Yang
Summary: A novel Pt doping method was designed to improve the thermal stability of CrWN coating. The doping of Pt atoms effectively blocks the coherent growth of the grains and creates a significant mixing effect, resulting in a smooth surface with uniform element distribution.
Article
Materials Science, Multidisciplinary
Xiaoye Wang, Xiaoguang Yang, Wenna Du, Tao Yang
Summary: In this study, the effects of multiple growth parameters on self-catalyzed growth of InAs/GaSb axial heterostructured nanowires on Si substrate by MOCVD were investigated. It was found that the growth temperature and switching time have significant influences on the nanowire growth.
Article
Materials Science, Multidisciplinary
Weizhong Cui, Yan Zhao, Can Cui, Xing Liu, Beili Pang, Jianguang Feng, Hongzhou Dong, Liyan Yu, Lifeng Dong
Summary: This study introduces Co2+ cations into Cs2AgBiBr6 film to improve its quality, grain size, and conductivity, resulting in enhanced solar cell efficiency.
Article
Materials Science, Multidisciplinary
Jian Wang, Ke Yang, Xianming Cheng, Yalin Lu, Ganghui Wu, Yang Zhang, Yun Kan
Summary: The corrosion behavior and microstructural evolution of Sc microalloyed Al-3.2Cu-1.5Li alloys were investigated in detail. The microstructural results showed higher levels of dislocations density in the Sc microalloyed sample, which resulted in significantly refined grains and T1 precipitates. Microalloying with Sc changed the corrosion mode of the alloy and localized corrosion was found to occur preferentially at the subgrain within unrecrystallized grains with high grain stored energy.
Article
Materials Science, Multidisciplinary
Weifeng Liu, Na Liu, Kaiqiang Song, Meiqin Zeng, Zhongchen Lu
Summary: Monoclinic WO3 prepared through plasma milling exhibits higher photocatalytic activity due to its higher surface area, increased oxygen vacancies, and defects.
