Article
Materials Science, Multidisciplinary
Zheng Li, Li Chen, Jie Zhang, Xu Sun
Summary: This study investigates the structural, mechanical, and thermal properties of TiAlN coatings with a multilayer structure and the incorporation of the fourth element. The Ti0.34Al0.48Ta0.18N/Ti0.42Al0.54B0.04N multilayer coating shows improved hardness and oxidation resistance compared to the monolithic coatings. The results suggest that multilayer structures and the addition of the fourth element are promising strategies to enhance the properties of TiAlN coatings.
Article
Materials Science, Coatings & Films
Kai Q. Li, Li Chen, Chun Hu, Jie Zhang, Jian W. Du
Summary: The effect of B and Si addition on the microstructure, mechanical properties, thermal stability, and oxidation resistance of CrAlN coating was investigated. Three coatings, Cr0.42Al0.58N, Cr0.37Al0.59B0.02Si0.02N, and Cr0.35Al0.58B0.03Si0.04N, were prepared and all showed a single-phase cubic structure. The addition of B and Si increased the hardness of the CrAlN coating due to solid solution strengthening, except in the case of excess B and Si, which caused a slight reduction in hardness. The addition of B and Si hindered the precipitation of w-AlN and the dissociation of Cr-N bonds during annealing. Furthermore, the CrAlBSiN coatings exhibited improved hardness and better overall performance compared to Cr0.42Al0.58N.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Materials Science, Coatings & Films
Chun Hu, Li Chen, V Moraes
Summary: In this study, the addition of boron into CrAlN coatings was found to enhance their thermal stability, increase hardness, and optimize oxidation resistance. The incorporation of boron delayed the formation of wurtzite AlN and hexagonal Cr2N, while promoting the formation of alpha-Cr2O3, resulting in improved performance in isothermal oxidation experiments at 1100 degrees C for 15 hours.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Materials Science, Coatings & Films
Xu Sun, Zhe R. Liu, Li Chen
Summary: Alloying with Si or Ta effectively improves the properties of TiAlN coatings. Si and Ta mixed doping enhances the hardness, thermal stability, and oxidation resistance of the coatings. The maximum hardness is achieved with the Ti0.42Al0.43Si0.09Ta0.06N coating, while the Ti0.42Al0.43Si0.09Ta0.06N coating also exhibits the best oxidation resistance.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Chemistry, Physical
Loris Chavee, Essam Serag, Stephane Lucas, Emile Haye, Mathieu da Silva Pires
Summary: This study fills the knowledge gap regarding the structural behavior and oxidation mechanisms of TixAl1-xN coatings annealed for extended duration. The results demonstrate that the oxidation mechanisms are independent of the annealing process and time, and occur separately from the structural changes.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Chun Hu, Li Chen, Yumin Lou, Ningning Zhao, Jianling Yue
Summary: By introducing TiAlSiN insertion layers, the overall properties of the CrAlN coating are optimized, with the Ti0.53Al0.38Si0.09N/CrAlN multilayer demonstrating the best comprehensive performance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Coatings & Films
Hua D. Zhang, Bei C. Wang, Jian W. Du, Li Chen
Summary: This study investigates the structure, mechanical, and thermal properties of AlN/Ti1-xAlxN multilayers and corresponding monolithic coatings. It is found that the multilayer structure can improve the hardness of coatings, with AlN/Ti0.38Al0.62N multilayer exhibiting the best oxidation resistance.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Materials Science, Coatings & Films
Jian W. Du, Li Chen, Jie Chen, Chun Hu
Summary: The study investigates the effect of oxygen addition on the structure, mechanical, and thermal properties of CrN coatings. Increasing oxygen content leads to the formation of a corundum structured Cr2O3 coating, with improved hardness. Different oxygen contents also influence the crystalline structure, thermal properties, nitride loss temperature, and oxidation resistance of the coatings.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Chemistry, Physical
Jie Zhang, Li Chen, Yi Kong
Summary: Introducing TiAlSiN insertion layers into TiAlVN coatings improves their oxidation resistance and leads to higher hardness values, with silicon doping and vanadium addition affecting solid solubility. The multilayer structure significantly enhances the hardness and thermal stability of TiAlVN coatings.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Coatings & Films
Xu Sun, Li Chen, Jian Zhou
Summary: Introducing cubic TiAlN insertion layers through a multilayer architecture can stabilize the growth of TiAlBN layers and improve the hardness and oxidation resistance of the coatings.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Materials Science, Ceramics
A. Farhadizadeh, J. Vlcek, J. Houska, S. Haviar, R. Cerstvy, M. Cervena, P. Zeman, M. Matas
Summary: We investigate the influence of nitrogen content on the functional properties, thermal stability, and oxidation resistance of Hf-Y-Si-B-C-N coatings. Ab-initio simulations are employed to understand the relationship between the experimentally obtained properties and the atomic and electronic structures of the coatings. The optimal nitrogen content in the plasma and coatings is identified, which surpasses the performance of previous high-temperature material Hf6Y2-Si29B12C2N45. These findings represent a step forward in achieving enhanced thermal stability and oxidation resistance while maintaining multiple functional properties.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
I. V. Blinkov, V. S. Sergevnin, A. V. Chernogor, D. S. Belov, A. P. Demirov, F. V. Kiryukhantsev-Korneev
Summary: This study compares the chemical and thermal stability and mechanical properties of arc PVD TiN and Ti0.97Al0.03N coatings. Heating the coatings to 600 and 700 degrees C causes changes in crystallite size and biaxial macrostress, lattice parameter, and lattice strain, with Ti0.97Al0.03N coating showing more significant changes. At 700 degrees C, the Ti0.97Al0.03N solid solution undergoes spinodal decomposition, maintaining its hardness and dispersion hardening. Ti0.97Al0.03N coating demonstrates better oxidation resistance in air.
INORGANIC MATERIALS
(2022)
Article
Materials Science, Coatings & Films
M. Athmani, A. AL-Rjoub, D. Cavaleiro, A. Chala, A. Cavaleiro, F. Fernandes
Summary: The addition of vanadium enhanced the hardness and Young's modulus of TiSiN/CrVxN multilayer coatings, but decreased their oxidation resistance. Annealing had a positive effect on the coatings, while the diffusion kinetics of V governed the oxidation behavior of V-containing films.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Jie Zhang, Li Chen, Yi Kong, Chun Hu, Zheren Liu, Yong Du, Shuyan Zhang
Summary: A TiAlTaN/TiAlSiN multilayer was developed in this study, combining the outstanding properties of Ti0.34Al0.48Ta0.18N and Ti0.56Al0.34Si0.10N coatings. The multilayer exhibited the best oxidation resistance among the three coatings, with superior hardness and thermal stability.
Article
Materials Science, Multidisciplinary
Byeong Seo Kong, Ji Ho Shin, Chaewon Jeong, Changheui Jang, Sung-Sik Kang
Summary: The deformation behavior of 8-ferrite in an aged austenitic stainless-steel weld was studied to understand the contribution of aging-induced nanofeatures to aging embrittlement. The strengthening effect of spinodal decomposition and G-phase precipitation was evaluated and compared using nanopillar compression tests. The results showed that the nanofeatures exhibited different stability during deformation, with G-phase being less effective as an obstacle compared to spinodal decomposition.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Ceramics
Zhe R. Liu, Bin Peng, Yu X. Xu, Quan Zhang, Qimin Wang, Li Chen
CERAMICS INTERNATIONAL
(2019)
Article
Chemistry, Physical
Fei Pei, Hui J. Liu, Li Chen, Yu X. Xu, Yong Du
JOURNAL OF ALLOYS AND COMPOUNDS
(2019)
Article
Chemistry, Physical
Zhe R. Liu, Yu X. Xu, Bin Peng, Wei Wei, Li Chen, Qimin Wang
JOURNAL OF ALLOYS AND COMPOUNDS
(2019)
Article
Chemistry, Physical
Chun Hu, Hui T. Wang, Li Chen, Yu X. Xu, Hui J. Liu, Yong Du
JOURNAL OF ALLOYS AND COMPOUNDS
(2019)
Article
Materials Science, Coatings & Films
Quan Zhang, Zhengtao Wu, Yu X. Xu, Qimin Wang, Li Chen, Kwang Ho Kim
SURFACE & COATINGS TECHNOLOGY
(2019)
Article
Materials Science, Multidisciplinary
Bin Peng, Haiqing Li, Quan Zhang, Yu X. Xu, Tiefeng Wei, Qimin Wang, Fengge Zhang, Kwang Ho Kim
Article
Materials Science, Multidisciplinary
Dongsen Geng, Haiqing Li, Ziliang Chen, Yu X. Xu, Qimin Wang
Summary: AlCrN/Cu coatings deposited by a hybrid PVD technique exhibit high hardness and low friction at elevated temperatures, with a dual-phase structure of (Al, Cr)N solid solution and Cu metallic phase. Excessive sputtering power from the Cu target can lead to a decline in hardness and disintegration of interlayer interfaces, while the formation of fine CuO grains on the coating surface contributes to reducing the friction coefficient.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Coatings & Films
Bin Peng, Yu X. Xu, Jian W. Du, Li Chen, Kwang Ho Kim, Qimin Wang
Summary: Metal-ion etching is used to modify substrate surfaces and improve the adhesion of coatings. Pre-etching introduces defects and increases surface roughness, resulting in enhanced adhesion between the coating and the substrate. However, it also leads to increased roughness of the coating surface, affecting the coating's friction performance.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Materials Science, Coatings & Films
Ziliang Chen, Ming Lou, Dongsen Geng, Yu X. Xu, Qimin Wang, Jun Zheng, Ruiyuan Zhu, Yubo Chen, Kwang Ho Kim
Summary: The study demonstrates that modifying the modulation geometry of TiSiN/TiAlN coatings can significantly improve the hardness, with reduced Lambda and increased lambda leading to enhanced wear resistance at different temperatures. The variation in modulation geometry results in changes in wear mechanisms for TiSiN/TiAlN coatings at different temperatures.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Haoqiang Zhang, Yu X. Xu, Yong Chen, Bin Peng, Tiefeng Wei, Fengge Zhang, Haiqing Li, Qimin Wang
Summary: The oxidation behavior of arc evaporated Al-Ti-B-N coatings was investigated. The addition of B promotes the formation of an amorphous scale and improves the oxidation resistance. The oxidation at the interface between the oxide and nitride leads to the continuous formation of an amorphous inner layer with excellent adhesion, while the crystalline outer oxide layer inhibits the inward diffusion of oxygen at elevated temperatures.
Article
Engineering, Mechanical
Dongsen Geng, Yu X. Xu, Bin Peng, Haiqing Li, Qimin Wang, Kwang Ho Kim
Summary: A comparative study was conducted on (Cr1-xAlx)(2)O-3 and (Cr1-xAlx) coatings with different Al contents (x = 0, 0.5, and 0.7) regarding their structural, mechanical, and tribological properties. It was observed that higher Al content resulted in a mixed structure of cubic and minor amorphous phases in the coatings. Additionally, the increase in Al content led to a decrease in hardness and residual compressive stress. Furthermore, the study revealed higher wear rates for the coatings under high-temperature conditions.
TRIBOLOGY INTERNATIONAL
(2023)
Article
Materials Science, Coatings & Films
Dongsen Geng, Yu X. Xu, Qimin Wang
Summary: In this study, Cr-O/Al-O coatings were fabricated using a hybrid deposition technique to reduce growth defects. The optimized process conditions resulted in high hardness Cr-O/Al-O coatings. These coatings exhibited excellent chemical inertness, making them promising protective layers for cutting tools.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Materials Science, Coatings & Films
Yong Chen, Yu X. Xu, Haoqiang Zhang, Qimin Wang, Tiefeng Wei, Fengge Zhang, Kwang Ho Kim
Summary: The mechanical and tribological properties of AlCrMoN hard coatings with different Mo contents were investigated. The addition of Mo did not reduce the friction coefficient as expected, but it enhanced the wear resistance at 600 degrees C due to the modification of the tribolayer. The incorporation of molybdenum oxides increased the deformation ability of the tribolayer and formed a Mo-N-O interlayer at the interface, promoting the good adherence of the nanocrystalline tribolayer and preventing further wear.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Bin Li, Yuxiang Xu, Guoliang Rao, Qimin Wang, Jun Zheng, Ruiyuan Zhu, Yubo Chen
Summary: To improve the wear resistance and cutting performance of AlTiN coatings, a structure optimization strategy and a nano-multilayer architecture strategy were presented. The investigated AlTiN coatings exhibited improved properties, including phase structure, hardness, adhesion, and tribological properties. The Al0.67Ti0.33N/Al0.5Ti0.5N multilayer with enhanced mechanical properties achieved the lowest wear rate and longest cutting lifetime.
Article
Chemistry, Physical
J. Zamora, T. Bautista, N. S. Portillo-Velez, A. Reyes-Montero, H. Pfeiffer, F. Sanchez-Ochoa, H. A. Lara-Garcia
Summary: Experimental and DFT studies were conducted on the structural, magnetic, and optical properties of RFeO3 perovskites. The perovskites exhibited an orthorhombic crystal structure and weak ferromagnetic behavior. They were confirmed to be semiconductors with a bandgap of approximately 2.1 eV.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xianxiang Lv, Jing Jin, Weiguang Yang
Summary: By depositing TiN and TiO2 surface layers on AlSi films, the electrochemical performance of silicon-based anodes can be significantly improved, suppressing volume expansion and promoting the formation of a stable SEI layer.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Sharafat Ali, Haider Ali, Syedul Hasnain Bakhtiar, Sajjad Ali, Muhammad Zahid, Ahmed Ismail, Pir Muhammad Ismail, Amir Zada, Imran Khan, Huahai Shen, Rizwan Ullah, Habib Khan, Mohamed Bououdina, Xiaoqiang Wu, Fazal Raziq, Liang Qiao
Summary: The construction and optimization of redox-heterojunctions using a bifunctional phosphate as an electron-bridge demonstrated significant improvements in photo catalytic activity, including enhanced dispersion, reduced interfacial migration resistance, and increased abundance of active-sites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ren-Ni Luan, Na Xu, Chao-Ran Li, Zhi-Jie Zhang, Yu-Sheng Zhang, Jun Nan, Shu-Tao Wang, Yong-Ming Chai, Bin Dong
Summary: Extensive research has revealed that oxygen evolution reaction (OER) in alkaline conditions involves dynamic surface restructuring. The development and design of sulfide/oxide pre-catalysts can reasonably adjust the composition and structure after surface reconstruction, which is crucial for OER. This study utilized a simple two-step hydrothermal method to achieve in situ S leaching and doping, inducing the composition change and structure reconstruction of CoFe oxides. The transformed FeOOH and CoOOH exhibited excellent OER activity and could be easily mass-produced using low-cost iron based materials and simple methods.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jun'an Lai, Daofu Wu, Peng He, Kang An, Yijia Wang, Peng Feng, WeiWei Chen, Zixian Wang, Linfeng Guo, Xiaosheng Tang
Summary: Zero-dimensional organic-inorganic metal halides (OMHs) are gaining attention in the fabrication of light-emitting diodes due to their broad emission band and high photoluminescence quantum yield. This work synthesized a zero-dimensional organic tetraphenylphosphonium bismuth chloride (TBC) that showed efficient blue light emission, with the emission mechanism attributed to the transition of Bi3+ ions. White light-emitting diodes (WLEDs) were fabricated using TBC, along with green-emitting and red-emitting single crystals, achieving single-component white emissions. These findings demonstrate the different emission mechanism of ns2 ions-based OMHs and highlight the potential of bismuth-based OMHs in WLEDs applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xuewei Liang, Yunhai Su, Taisen Yang, Zhiyong Dai, Yingdi Wang, Xingping Yong
Summary: The revolutionary design concept of high-entropy alloys has brought new opportunities and challenges to the development of advanced metal materials. In this work, AlCrCuFe2NiTix high-entropy flux cored wires were prepared by combining the design idea of a high-entropy alloy with the characteristics of flux cored wire. AlCr-CuFe2NiTix high-entropy surfacing alloys were prepared using gas metal arc welding technology. The wear properties of the alloys were analyzed, and the phase composition, microstructure, strengthening mechanism, and wear mechanism were discussed. The results show that the alloys exhibit a dendritic microstructure with BCC/B2 + FCC phases. Increasing Ti content leads to the precipitation of Laves phase. The alloys show improved microhardness and wear resistance due to the precipitation of coherent B2 and Laves phases. However, excessive Ti addition results in the increase of Laves phase and reduced wear resistance of the alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
M. Vadivel, M. Senthil Pandian, P. Ramasamy, Qiang Jing, Bo Liu
Summary: This work presents the enhanced photocatalytic and electrochemical performance of g-C3N4 assisted PAA on CoFe2O4 ternary nanocomposites. The incorporation of PAA and g-C3N4 improves the separation efficiency of photogenerated charge carriers, resulting in superior photocatalytic degradation and high specific capacitance values.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Vibhu T. Sivanandan, Ramany Revathy, Arun S. Prasad
Summary: In this study, pure and doped cobalt ferrite nanoparticles were prepared using the sol-gel auto-combustion method with the aid of lemon juice as eco-fuel. The crystal structure, lattice parameter, crystallite size, microstrain, optical parameters, and room temperature magnetic properties of the samples were analyzed. The effect of doping on the magnetic properties was also investigated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qing Guo, Bowen Zhang, Benzhe Sun, Yang Qi
Summary: This study prepared ZnO films with various nonpolar preferred orientations using conventional chemical bath deposition method and characterized their growth process and mechanism. It was found that the type and concentration of nitrate could control the preferred orientation and surface roughness of ZnO films. Additionally, ZnO films with different preferred orientations exhibited different optical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Chong Zhang, Yan Liu, Zhaoyan Wang, Hang Yang
Summary: In this study, six bimetallic FeCo particles were synthesized via the hydrothermal method at different Fe:Co ratios. The Fe:Co ratio not only modulates the composition of the particles but also influences their structure and magnetic properties. The FeCo alloys showed a transformation from an Fe-based structure to a Co-based structure with increasing Co content. The Fe:Co ratio of 1:1 and 3:1 resulted in particles with the highest and lowest saturation magnetization, respectively.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jianning Zhang, Jing Li, Yiren Wang, Xiaodong Mao, Yong Jiang
Summary: We conducted a study on the formation of ultra-fine Y-Ti-Ta-O nano-oxides in Ta+B micro-alloyed 13CrWTi-ODS alloys using electron microscopy and first-principles calculations. The Y-Ti-Ta-O nano-oxides were found to be mainly Y2(Ti,Ta)2O7, with an average size of 7 nm and a number density of 6.8 x 1023 m-3. Excess boron was found to enhance the adhesion of some low-sigma grain boundaries but weaken the Fe/Y2Ti2O7 interface, while excess tantalum enhanced the Fe/Y2Ti2O7 interface but caused serious degradation of grain boundaries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Yirong Fang, Pei Cheng, Hang Yuan, Hao Zhao, Lishu Zhang
Summary: A new composite system of nitrogen-doped reduced graphene oxide and black phosphorus quantum dots has been developed for tumor therapy, showing improved electrochemical properties and stability. The system generates hydrogen peroxide and hydroxyl radical to effectively kill tumor cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xiufang Qin, Yuanli Ma, Hui Zhang, Ting Zhang, Fang Wang, Xiaohong Xu
Summary: The structure and magnetism of cobalt ferrites after Mn2+-Tb3+ co-doping were studied. Co-doped samples exhibited cubic spinel structure and spherical shape of ferrite nanoparticles. The redistribution of Co2+ and Fe3+ ions between octahedral and tetrahedral sites was observed due to Mn2+-Tb3+ co-doping. The coercivity and magnetization saturation of co-doped samples were significantly improved, leading to a maximum energy product that is 190% higher than that of the un-doped sample.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ho Yeon Lee, Wonjong Yu, Yoon Ho Lee
Summary: Recently, there has been an increasing interest in developing ultra-fine nanostructured electrodes with extensive reaction areas to enhance the performance and low-temperature operation of solid oxide fuel cells. The use of a refined approach involving co-sputtering metal alloys and oxide targets has demonstrated the feasibility of nano-columnar structures in perovskite-based electrodes, expanding the temperature range of thin film electrodes. This study systematically examines the effects of chamber pressure control in the co-sputtering process and identifies the intricate relationship between sputtering pressure and film structure. By fine-tuning the columnar growth in the electrode, significant improvements in performance and thermo-mechanical properties were achieved, resulting in high-performance all-sputtered solid oxide fuel cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qianyun Bai, Xiaoxiao Yan, Da Liu, Kang Xiang, Xin Tu, Yanhui Guo, Renbing Wu
Summary: This study proposes a simple method to develop a non-precious transition metal-based electrocatalyst with high catalytic activity and robustness for the hydrogen evolution reaction. The as-synthesized electrode exhibits a low overpotential and high current density, indicating its potential in energy conversion.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
