Article
Materials Science, Multidisciplinary
P. K. Shurkin, N. Letyagin, A. Yakushkova, M. E. Samoshina, D. Yu Ozherelkov, T. K. Akopyan
Summary: The microstructure and hardness of the Al-Ca-Ni-Mn alloy fabricated by laser-powder bed fusion were studied in the as-built condition and after annealing at 200-400 degrees C for 3 hours. A decrease in hardness was observed after exposure at 300 degrees C, attributed to the growth of primary and eutectic phases. The eutectic phase played the most significant role in hardening.
Article
Crystallography
Qiang Shen, Yan Li, Jing Zhao, Dezheng Liu, Yongsheng Yang
Summary: In this study, a CrFeMoNbTiW high-entropy alloy coating was prepared on a Q245R steel substrate using laser cladding. Annealing at temperatures ranging from 800°C to 1000°C resulted in the increase of microhardness and wear resistance of the coating, showing potential for improved performance in wear resistance applications.
Article
Nanoscience & Nanotechnology
He Wei, Yinli Chen, Zulai Li, Quan Shan, Wei Yu, Di Tang
Summary: By conducting an in-depth exploration of the microstructure evolution and characterization of the dislocation density in Cu-Ni-Si-Co alloy, it was found that the alloy has good mechanical properties and electrical conductivity. The study also identified various structural features of the alloy, highlighting its potential for performance optimization and application.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Physics, Condensed Matter
Barsha Priyadarshini, Shahid Anwar, Bishnu Choudhary, Sharmistha Anwar
Summary: The thermal and chemical stability of CrAlN coatings were studied. The coatings showed good properties below 700 degrees C, but degradation and crack formation occurred at temperatures above 800 degrees C. Corrosion tests and electrochemical impedance spectroscopy confirmed outstanding corrosion resistance of the coatings, even at 800 degrees C.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Nanoscience & Nanotechnology
M. R. Kamali, A. R. Mashreghi, L. P. Karjalainen, S. Hasani, V Javaheri, M. Seiyedbeigi, J. Komi
Summary: Various contributors have been suggested to explain the variation of mechanical properties of Fe-Co-V magnetic alloys, but a comprehensive understanding is still lacking. The study found that annealing at temperatures between 450 and 550 degrees C led to an increase in hardness and yield strength, but a decrease in elongation. The results showed that the increase in hardness after annealing at these temperatures was likely due to the ordering transition in ferrite in Fe-Co and Fe-Co-2V alloys, while the decrease in yield strength was attributed to factors such as recovery and recrystallization of ferrite and decreasing number of (Co,Fe)(3)V precipitates.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Coatings & Films
Peter Nagy, Laszlo Peter, Zsolt Czigany, Nguyen Quang Chinh, Jeno Gubicza
Summary: A Co-Fe-Ni-Zn multi-principal element alloy (MPEA) film with a thickness of 2.5 μm is electrodeposited, exhibiting a nanocrystalline microstructure with an average grain size of 12 nm. The majority of the film has a face-centered cubic (fcc) structure, with small fractions of body-centered cubic (bcc) and amorphous phases. The coating demonstrates a superior hardness of 9.2 and an elastic modulus of 197 GPa, which can be attributed to the small grain size and the presence of nanocrystalline bcc and amorphous minority phases. This study highlights the capability of electrodeposition in producing MPEA layers with desired composition and outstanding hardness.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Xiaotong Chen, Xuefeng Lu, Junqiang Ren, Hongtao Xue, Fuling Tang, Yutian Ding
Summary: The addition of an appropriate amount of Co atoms in the grain boundary region of nano-polycrystalline Ni can enhance the material's tensile strength through solid solution strengthening. However, excessive introduction of solute atoms can lead to the destruction of grain boundary stability and accelerate material yielding. The dislocations are distributed in a grid at the grain boundaries, and their number and length increase with increasing strain, forming a large number of entanglements. The interaction between Shockley dislocation and other dislocations forms a more stable dislocation structure, greatly enhancing the strength of the system.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Yan Chong, Tilak Bhattacharjee, Yanzhong Tian, Akinobu Shibata, Nobuhiro Tsuji
Summary: This study systematically modified the volume fractions of primary alpha grains in Ti-6Al-4V alloy bimodal microstructures to investigate their tensile properties at different intercritical annealing temperatures. The results indicated that in the low temperature region, where the hardness of alpha(p) was significantly higher than that of beta(trans), the bimodal microstructures exhibited remarkable strengthening effects. Conversely, in the high temperature region where the hardness of beta(trans) and alpha(p) were comparable, the bimodal microstructures experienced a significant decrease in uniform elongation due to the absence of clear strain partitioning and strain gradient across the interfaces.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Wenhe Wu, Shuixin Ye, Ruidong Wang, Chao Zhang, Yuwen Zhang, Xionggang Lu
Summary: To investigate the influence of process parameters on coating microstructure and wear resistance, Ni60A alloy was deposited on copper surface under various preheating temperatures using plasma cladding. The resulting coatings were composed of a new alloy material formed by the mixture of Ni60A alloy with Cu, and their microstructure and properties were closely associated with the dilution rate. Increasing the preheating temperature significantly raised the dilution rate of the coatings, leading to an increase in copper content and subsequently causing compositional inhomogeneity and deterioration of performance. The average hardness of the coating decreased from 680.3 HV0.1 to 406.6 HV0.1, and the wear resistance reduced by 2.8 times when the preheating temperature increased from 500°C to 800°C. The wear mechanism transitioned from abrasive wear to the combined effect of abrasive wear and adhesive wear. Hence, for optimal wear resistance, it is recommended to maintain a low preheating temperature in practical applications.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Ceramics
Yanan Liu, Quan Wang, Jichang Xie, Xuejiao Yang, Peng Peng, Yue Wang, Mengrong Li, Chul Hee Ryu, Yun Hwan Joo, In Wha Jeong, Tae Hyun Sung, Liangliang Xu
Summary: An enhanced surface composite coating with improved nano-hardness was successfully prepared on Ti811 alloy using laser cladding processing. The investigations showed that the coating had multiple phases and the effective combination between interfaces ensured the improved nano-hardness of the coating.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Marina Samodurova, Nataliya Shaburova, Olga Samoilova, Ahmad Ostovari Moghaddam, Kirill Pashkeev, Vladimir Ul'yanitckiy, Evgeny Trofimov
Summary: This paper focuses on the characterization of WC-10Co-4Cr coating deposited on an Al-4Cu-1Mg alloy using detonation spray method. The results showed that the coating has low porosity and refined carbide grains. The variation of spraying distance did not influence the coating microstructure and composition.
Article
Materials Science, Multidisciplinary
Chen Chen, Shuhan Yuan, Junli Chen, Wei Wang, Weiwei Zhang, Ran Wei, Tan Wang, Tao Zhang, Shaokang Guan, Fushan Li
Summary: This paper investigates a CrFeNiAl0.2Si0.2 high entropy alloy fabricated via laser-surface melting, showing excellent corrosion resistance and high hardness possibly due to the diversity in compositional constitution of the passive films.
Article
Materials Science, Coatings & Films
Jijie Yang, Chenglei Wang, Laichang Zhang, Zhijun Wang, Mulin Liang, Chong Liu, Weijie Liu, Xin Li, Shengfeng Zhou, Hong Tan
Summary: The objective of this study is to develop a new type of high-entropy alloy (HEA) coating with high temperature oxidation resistance. The Fe-Ni-Cr-Co-Mo-W HEA coatings were prepared by plasma surface alloying technology with different holding temperatures and their microstructure morphology evolution and properties were systematically studied. The results showed that the coatings had a gradient structure, excellent metallurgical bonding, and improved resistance to abrasion and high temperature oxidation.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Pham Tran Hung, Megumi Kawasaki, Jae-Kyung Han, Janos L. Labar, Jeno Gubicza
Summary: Through experiments and heat treatment, it was found that there were two exothermic peaks in the nanocrystalline CoCrFeNi alloy during annealing, corresponding to the decrease of lattice defects and the increase of grain size. The hardness of the alloy remained unchanged during recovery, but decreased during recrystallization.
MATERIALS CHARACTERIZATION
(2021)
Article
Materials Science, Coatings & Films
Ya-gang Zhang, Wan-chang Sun, Ya-ru Dong, Min Ma, Yu-wan Liu, Sha-sha Tian, Yan Xiao, Ya-peng Jia
Summary: Ni/B co-doped diamond-like carbon (Ni/B-DLC) films were synthesized on AZ91D magnesium alloy surface by electrodeposition under mild environment. The co-doping of Ni and B led to changes in the morphology and structure of the films, resulting in higher hardness and excellent wear resistance.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Ananta Dutta, Surjya K. Pal, Sushanta K. Panda
Summary: In the realm of micro-Friction Stir Welding (FSW), this study investigates the influence of pinless and pin tool on hook formation, temperature evolution, and bonding mechanisms. The study reveals that pin tool improves joint strength and reduces axial force during traversing. Pin tool also exhibits a higher proportion of recrystallized grains compared to pinless tool, resulting in better weld quality.
MATERIALS TODAY COMMUNICATIONS
(2024)
Article
Materials Science, Multidisciplinary
Abdelmalek Habes, Mehdi Derradji, Oussama Mehelli, Fouad Benaliouche, Slimane Abdous, Youcef Medjaouri, Nour Chirine Abderrahim, Hakima Fodil, Mohamed El Amine Kadi
Summary: In recent years, there has been significant progress in advancing nanomaterials with exceptional properties for electromagnetic (EM) wave absorption. This study investigates the application of a novel thermosetting phenolic resin as a polymeric matrix for EM shielding, highlighting the enhancement of stability with the incorporation of zinc oxide nanoparticles.
MATERIALS TODAY COMMUNICATIONS
(2024)
Article
Materials Science, Multidisciplinary
Xiaoxing Zhang, Yongchao Luo, Kai Xu, Weihao Liu, Shuangshuang Tian, Benli Liu, Jiahao Wang, Feng Hu
Summary: This study calculates and analyzes the adsorption performance and sensing characteristics of Cu-MoTe2 for SF6 decomposition components. The results show that Cu-MoTe2 chemisorbs SO2 and H2S, while physisorbs SOF2. Cu-MoTe2 has the potential to be used as a chemical sensor material.
MATERIALS TODAY COMMUNICATIONS
(2024)
Article
Materials Science, Multidisciplinary
Xin Qu, Xinyu Sang, Yarong Lv, Ce Wang, Ping Hu, Quanyi Guo, Yong Liu
Summary: In this study, a PLLA-COI multilayer nanofiber membrane was prepared to prevent peritendinous adhesion, and it was found to have good cell compatibility and anti-adhesion effect, effectively promoting the recovery of Achilles tendon injury.
MATERIALS TODAY COMMUNICATIONS
(2024)
Article
Materials Science, Multidisciplinary
Ching-Yuan Ho, Chen-Yi Su, Wei-Zhe Hu
Summary: An equivalent electrical circuit (EEC) is established to understand the droplet-base electricity generation (DEG) mechanism, using voltage-time curve decomposition. The concept of Debye length is introduced to explain charge density at the interface between the ionic droplet and the PTFE surface. This study provides valuable insights into the exponential decay of output voltage and the improvement of solar panel performance in alternating rainy and dry weather through correct circuit design.
MATERIALS TODAY COMMUNICATIONS
(2024)
Article
Materials Science, Multidisciplinary
Iori Ono, Takeo Oku, Atsushi Suzuki, Sakiko Fukunishi, Tomoharu Tachikawa, Tomoya Hasegawa
Summary: The effects of adding rubidium (Rb) and ethylammonium (CH3CH2NH3, EA) to guanidinium [C(NH2)3, GA] based CH3NH3PbI3 perovskite solar cells were investigated. The lattice constants and (100)-orientation of EA and Rb-modified perovskite crystals increased compared to the as-prepared perovskite. The addition of GA and EA effectively improved the photovoltaic properties of the device under indoor light conditions.
MATERIALS TODAY COMMUNICATIONS
(2024)
Article
Materials Science, Multidisciplinary
Xuewu Li, Hongxing Wang, Zhiguo Xing, Yanfei Huang, Weiling Guo, Haidou Wang, Yanfang Zhang, Longlong Zhou
Summary: This study prepared a novel composite antireflective structure with slotted holes using FDTD simulation combined with femtosecond laser design to further improve the infrared anti-reflective performance. The results show that the antireflection performance of the simulated groove-hole composite structure is better than that of the individual groove and hole structures, and the nanoparticle structures can further improve the antireflection performance in the infrared region.
MATERIALS TODAY COMMUNICATIONS
(2024)
Article
Materials Science, Multidisciplinary
Sepideh Soltani, Hajar Ghanbari, S. Mohammad Mirkazemi
Summary: In this study, h-BN and r-BN structures were synthesized through controlled nitridation. The h-BN exhibited sheet-like morphology, while the r-BN formed needle-like hollow structures.
MATERIALS TODAY COMMUNICATIONS
(2024)
Article
Materials Science, Multidisciplinary
Wanying Zhang, Xiaoyuan Wang, Yibo Ai, Weidong Zhang
Summary: This study investigates the impact of oxygen corrosion on the mechanical properties of uranium and uranium alloys and develops a feature-guided decision tree algorithm for prediction. The research highlights crucial correlations discovered through feature engineering, improving the performance of machine learning models. The mechanical properties of uranium and uranium alloys after oxygen corrosion are successfully predicted with a prediction error of less than 5%.
MATERIALS TODAY COMMUNICATIONS
(2024)
Article
Materials Science, Multidisciplinary
Qiong Cheng, Yao Zhao, Juntao Zhuang, Ahmad M. Alshamrani
Summary: This study presents a model to simulate the transient dynamics of a car's hood door during an accident, with reinforced structure in the axial direction using graphene nanoplatelets. The results are verified through comparison with open-source results and deep neural networks. The study highlights the importance of graphene nanoplatelets in the composite system's transient and forced vibrations, and provides valuable suggestions for future structural designs.
MATERIALS TODAY COMMUNICATIONS
(2024)
Article
Materials Science, Multidisciplinary
Rostyslav Nizinkovskyi, Thorsten Halle, Manja Krueger
Summary: Cu-precipitation in reactor pressure vessel steels is a major concern for the degradation of mechanical properties. This study develops and implements a non-local phase-field model to investigate the equilibrium morphology of precipitates in the over-aged state. The model confirms that the precipitates should have an oblate lath-like shape, which is supported by experimental data. The orientation of the precipitates is consistent with literature. The mechanism of morphology accommodation is explained using the invariant-line method. However, the equilibrium values of elongation significantly deviate from experimental data, likely due to the metastable state of the precipitates during the coarsening process.
MATERIALS TODAY COMMUNICATIONS
(2024)
Article
Materials Science, Multidisciplinary
Xiaowei Li, Yafei Liu, Shiyu Luan, Deqing Ma, Xiaoyu Liu, Qiangbing Liu, Jinhui Wang
Summary: In this study, the hot deformation behavior of as-cast Mg-2Ho binary alloy under different strain rates and deformation temperatures was systematically studied. The microstructure and dynamic recrystallization mechanisms were analyzed using SEM and EBSD techniques. A strain-compensated Arrhenius constitutive equation and a PSO-BP ANN model based on machine learning were established to analyze the flow behavior. The experimental results showed that the flow stress decreased with increasing temperature and decreasing strain rate. The PSO-BP ANN model demonstrated good accuracy in predicting flow stress.
MATERIALS TODAY COMMUNICATIONS
(2024)
Article
Materials Science, Multidisciplinary
Jiaxin Liu, Guangkai Liao, Zhenyan Xie, Bowen Li, Lingna Cui, Yuejun Liu
Summary: This study investigated the rheological behavior of polyamide 6 (PA6) film during biaxial stretching and found that the elastic-plastic deformation during stretching affected the stress rebound or relaxation during heat setting. The relaxation spectrum and activation energy spectrum were calculated, revealing the process of stress relaxation as energy release and stress rebound as energy absorption. The results provide theoretical guidance for understanding the biaxial stretching deformation mechanism of polymer films.
MATERIALS TODAY COMMUNICATIONS
(2024)
Article
Materials Science, Multidisciplinary
Monisha Manathanath, Benu George, Juraij Kandiyil, Subramaniam Sujatha, Suchithra Tharamel Vasu, Sujith Athiyanathil, Unnikrishnan Gopalakrishna Panicker
Summary: This study explores a method that combines a biodegradable polymer scaffold with a photosensitizer for antibacterial photodynamic therapy. The results show a high inhibition rate against E. coli and S. aureus using this method.
MATERIALS TODAY COMMUNICATIONS
(2024)
Article
Materials Science, Multidisciplinary
Mohammad Hemmat Esfe, S. Ali Eftekhari, S. Mohammad Sajadi, Mohammad Hashemian, Soheil Salahshour, Seyed Majid Motallebi
Summary: In this study, an artificial neural network was used to predict the dynamic viscosity of MWCNT-ZnO (25:75)/SAE 10W40 oil nano-lubricant. The temperature, shear rate, and solid volume fraction were found to have significant effects on the dynamic viscosity, with shear rate being the most influential parameter.
MATERIALS TODAY COMMUNICATIONS
(2024)