Article
Materials Science, Coatings & Films
Hui Jin, Renjie Ji, Tiancong Dong, Shuo Liu, Yonghong Liu, Fan Zhang, Chi Ma, Shenggui Liu
Summary: The study prepared Ni-Fe-WC composite coatings by jet electrodeposition and found that with the increase of deposition current density or deposition temperature, the content of WC particles in the coating also increased.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Materials Science, Coatings & Films
Huan Yu, Zongan Luo, Yingying Feng, Zhaosong Liu, Guangming Xie, R. D. K. Misra
Summary: Fe-based/B4C composite coatings with different Cu contents were prepared on the surface of ASTM 1045 steel by vacuum cladding. The influence of Cu contents on the microstructure, hardness, wear behavior and corrosion resistance of coatings was investigated. The results showed that Cu additions improved the microstructure and hardness of the coatings, reduced wear volume, and enhanced corrosion resistance through the formation of a composite oxide passive film.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Xiaoqing Liu, Dechang Zeng, Yaosha Wu, Zhigang Zheng, Zhaoguo Qiu
Summary: Fe-based composite coatings doped with TiB2 and CNTs were fabricated successfully, showing improved corrosion resistance and microstructure.
Article
Chemistry, Analytical
Zhenhua Chu, Shikun Teng, Yuyun Zhou, Xingwei Zheng, Jingxiang Xu, Fang Wang, Baosen Zhang
Summary: In this study, the corrosion resistance of amorphous and composite coatings with various proportions of AT13 ceramic in 3.5 wt.% NaCl solution was investigated. The addition of AT13 greatly improved the corrosion resistance, with the composite coating containing 15 wt.% AT13 demonstrating the best corrosion resistance.
Article
Materials Science, Multidisciplinary
Hui Jin, Renjie Ji, Tiancong Dong, Shuo Liu, Fan Zhang, Lilong Zhao, Chi Ma, Baoping Cai, Yonghong Liu
Summary: The study prepared nickel-iron coatings enhanced with WC particles through jet electrodeposition and found that increasing the deposition temperature can help obtain higher numbers of hard particles. Various tests showed that WC particles can improve the corrosion resistance of the coating, and an appropriate proportion of WC particles can effectively reduce corrosion.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Physical
Jiayi He, Xuefeng Liao, Xuexia Lan, Wanqi Qiu, Hongya Yu, Jiasheng Zhang, Wenbing Fan, Xichun Zhong, Zhongwu Liu
Summary: A novel method of using annealed Al-Cr coating is proposed to achieve surface protection, grain boundary modification, and enhanced performance of Nd-Fe-B magnets. The addition of Cr significantly improves the hardness of Al coating and modifies the diffusion process of Al. The coated magnets exhibit high hardness, strong adhesion, sufficient corrosion resistance, good anti-oxidation, and improved coercivity.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Silong Cao, Jun Liang, Jiansong Zhou
Summary: Nano-crystalline strengthening Fe-based amorphous composite coatings were successfully prepared using optical laser cladding technology. The influence of Mo content on the microstructure, mechanical, corrosion, and tribological properties of the coatings was studied. Results showed that the addition of Mo changed the phase composition and relative content of the coatings, with an optimal Mo content leading to improved performance. The modified coating with a composition of Fe41.4Cr16.2Mo10Ni5.4B1.5Si1.5 exhibited excellent mechanical, corrosion, and wear resistance properties.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
Xiaojuan Shang, Qibin Liu, Yaxiong Guo, Kailu Ding, Tianhai Liao, Fangping Wang
Summary: In this study, nano-TiC reinforced [Cr-Fe4Co4Ni4]Cr3 HEA composite coatings were fabricated on 904 L stainless steel by laser cladding. The composite coatings exhibited high microhardness, wear resistance, and corrosion resistance, making them suitable for resisting corrosion wear in phosphoric acid reactors.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Coatings & Films
Meihui Sun, Jinsong Song, Cuiwei Du, Yong Yang, Dianran Yan
Summary: The corrosion resistance of the three composite coatings is closely related to their microstructures and defects. The CAC-2 coating with uniform and dense microstructure exhibits the best corrosion resistance, while the CAC-1 coating with large-size Cr particles and high porosity has the worst corrosion resistance. The CAC-3 coating, characterized by uneven microstructure, shows lower corrosion resistance compared to the CAC-2 coating.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Edgar Carneiro, Jose David Castro, Maria Jose Lima, Jorge Ferreira, Sandra Carvalho
Summary: Hexavalent chromium-free coatings were developed for frequently touched decorative parts using reactive magnetron sputtering. The coatings, Cr and CrO, showed the highest impedance modulus and the best corrosion resistance in artificial sweat tests.
Article
Materials Science, Coatings & Films
Zhifei Zhang, Yang Bai, Yi He, Hongjie Li, Teng He, Ruxia Song, Yahui He, Jinxue Song, Bo Liu
Summary: Ni-Fe-P/Mg-Al layered double hydroxide (LDH) composite coatings with high corrosion and wear resistance were prepared. The uniform distribution of Mg-Al LDH nanosheets in the composite coating enhanced the wear resistance of the Ni-Fe-P matrix.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Huan Yu, Zongan Luo, Xin Zhang, Yingying Feng, Guangming Xie
Summary: Fe-based/B4C composite coatings without and with Ni or Cu additives were prepared by vacuum cladding, and their corrosion behavior in 0.5 mol/L HCl solution was investigated. The results showed that the coatings were metallurgically bonded to the steel substrate. The addition of Ni or Cu resulted in phase transformation in the coating matrix, formation of martensite, and changes in the morphology of hard phases. The corrosion resistance of the coatings was significantly improved by the additions of Ni or Cu, with the Cu-added coating exhibiting the best corrosion resistance.
Article
Chemistry, Physical
Qilan Lin, Xun Wang, Meng Cai, Han Yan, Zhuang Zhao, Xiaoqiang Fan, Minhao Zhu
Summary: The addition of Si3N4@MoS2 core-shell hybrid particles (CSs) improves the tribological and anti-corrosion properties of the composite coating, mainly due to the synergy between Si3N4 with high hardness and MoS2 with self-lubrication and shielding effect. This synergistic performance enhances the tribocorrosion resistance of the organic matrix.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Shijie Song, Han Yan, Meng Cai, Yu Huang, Xiaoqiang Fan, Minhao Zhu
Summary: The multifunctional epoxy composite coating with multilayer structure, constructed by layer-by-layer assembly method, shows improved impedance value, long-term chlorine resistance, reduced wear rate, and enhanced UV aging resistance.
Article
Materials Science, Multidisciplinary
Xiaoyan Zhang, Tiegang Luo, Shenglin Liu, Zhibin Zheng, Juan Wang, Kaihong Zheng, Shuai Wang, Huantao Chen
Summary: Fe-based austenite-containing composite coatings with different contents of austenite powder additions were created by supersonic plasma spraying. The effects of austenite powder on the microstructure, phase composition, microhardness, porosity, and corrosion resistance of the coatings were investigated. The results showed that the addition of austenite powders significantly improved the corrosion resistance of Fe-based coatings through three correlated phenomena.
Article
Materials Science, Multidisciplinary
Wei Hao Zhu, Lei Ma, Mu Fen He, Zhi Kun Li, Huan Zhi Zhang, Qing Rong Yao, Guang Hui Rao, Kun Peng Su, Xi Chun Zhong, Zhong Wu Liu, Xin Qiang Gao
Summary: The complex magnetic transition, magnetocaloric effect, refrigerant capacity, and magnetic-phase diagram of single-phase TbDyHoEr high-entropy alloy were investigated. Results showed that the melt-spun treatment significantly improved the refrigerant capacity of TbDyHoEr from 883.19 to 1049.22 J kg(-1) due to complex magnetic transition and ideal table-like magnetocaloric effect. The improved application potential of TbDyHoEr as a high-efficient magnetic refrigeration material and the ideal table-like magnetocaloric effect in a large temperature range enable this material to meet the requirements of cryogenic and mesothermal refrigeration for an Ericsson cycle.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Materials Science, Ceramics
Jie Jiang, Yu Yang, Wanqi Qiu, Dongling Jiao, Xichun Zhong, Zhongwu Liu
Summary: A newly designed composite target of AlxCr95-x(alpha-Al2O3)5 was used to deposit an Al-rich alpha-(Al, Cr)2O3 film at low temperatures. The composition, structure, and properties of the deposited films were studied using various techniques. It was found that by sputtering an Al70Cr25(alpha-Al2O3)5 target at 550 degrees C, a single Al-rich alpha-(Al0.74Cr0.26)2O3 phase with high nanohardness, high H/E ratio, and high elastic recovery value was obtained. By varying the Cr and Al content in the target, different phases and compositions of the films could be achieved.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Zhigao Yu, Xiangyi Liu, Jiayi He, Jiali Cao, Wenbing Fan, Yaxiang Wu, Hongya Yu, Zhongwu Liu, Zhan Wang, E. Niu
Summary: This study compares the different element diffusion and demagnetization behaviors in Tb-Cu diffused single-main-phase (SMP) and multi-main-phase (MMP) Nd-Fe-B magnets. The results show that although the infiltration of Tb is deeper in MMP magnets, the coercivity enhancement is much less compared to SMP magnets. This is attributed to the composition homogenization caused by strong inter-diffusion between the main phases in MMP magnets during the grain boundary diffusion (GBD) treatment. The non-concurrent magnetic reversal and poor loop squareness in the MMP magnets are mainly due to the large difference in H-A between the surface and the center after composition homogenization.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Materials Science, Multidisciplinary
Xichun Zhong, Yucai Wu, Yuanxin Li, Xuan Huang, Jiaohong Huang, Cuilan Liu, Hongya Yu, Zhongwu Liu, Minglong Zhong, Zhenchen Zhong, R. V. Ramanujan
Summary: A series of LaFe11.8Si1.2/La65Co35 bulk composites were fabricated by spark plasma sintering (SPS) followed by diffusion annealing. The sintering temperature was found to have an effect on the mechanical and magnetocaloric properties of the composites. The annealed samples exhibited a 1:13 phase content of approximately 90 wt% and showed improved properties when the sintering temperature was adjusted.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Engineering, Electrical & Electronic
Jiaming Li, Hongya Yu, Pan Luo, Han Yuan, Zhongwu Liu, Yu Wang, Lu Yang, Wenjie Wu
Summary: Amorphous soft magnetic powder cores (AMPCs) were prepared through inorganic-organic multiple-layer coating. The influence of phosphating treatment on the performance of AMPCs was investigated. The results showed that phosphoric acid-ethanol coating at relatively high temperature resulted in uniform and dense phosphate coating, leading to significantly reduced eddy current loss of the AMPCs. Optimized magnetic properties, including good frequency stability and low core loss, were achieved by coating the AMPCs with a 0.6 wt.% phosphoric acid-ethanol solution at 55 degrees C.
JOURNAL OF ELECTRONIC MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Jiayi He, Wenyue Song, Xiangyi Liu, Wenbing Fan, Bang Zhou, Zhigao Yu, Jiali Cao, Hongya Yu, Xichun Zhong, Zhongwu Liu, Huayun Mao
Summary: Grain boundary diffusion (GBD) is an effective method to enhance the coercivity of Nd-Fe-B magnets with lower consumption of heavy rare earths (HREs). This study proposes a macroscopically heterogeneous GBD (MHGBD) process to further reduce the use of HRE resources. The MHGBD process strengthens the edge area using HRE-based diffusion source and the center area using light rare-earth-based diffusion source. The results show that the MHGBD process significantly increases the coercivity from 1182 to 1911 kA/m.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Xuefeng Liao, Weiwei Zeng, Lizhong Zhao, Qing Zhou, Jiayi He, Wei Li, Xiangyi Liu, Hongya Yu, Xiaolian Liu, Haoyang Jia, Jean-Marc Greneche, Xuefeng Zhang, Zhongwu Liu
Summary: This article introduces a new method to improve the magnetic properties of rare earth-iron-boron magnets. By using a two-step grain boundary diffusion process, a magnet with excellent magnetic properties was obtained. The formation of RE-rich grain boundary layer through doping and diffusion was found to contribute to the enhancement of coercivity, supported by differential scanning calorimetry and transmission electron microscopy.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Hongya Yu, Xiaoxiang Lai, Xichun Zhong, Zhongwu Liu, Baochun Guo, Xi Chen, Guangze Han
Summary: The SiO2 insulating layer was successfully prepared on the FeSiCr powders by one-step dumping sol-gel method using ammonia as the catalyst. The growth of SiO2 layer can be controlled by the concentration of ammonia. SiO2 grows with heterogeneous nucleation when the ammonia concentration is 0.08-0.16 ml/g, while grows with both heterogeneous and homogeneous nucleation when the ammonia concentration is 0.20-0.24 ml/g.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Yu-Cai Wu, Xi -Chun Zhong, Yuan-Xin Li, Xuan Huang, Jiao-Hong Huang, Cui-Lan Liu, Zhong-Wu Liu, Wan-Qi Qiu, Ming -Long Zhong, Zhen-Chen Zhong, R. V. Ramanujan
Summary: LaFe11.8Si1.2/16wt%La65Co35 samples were prepared by spark plasma sintering (SPS) and subsequent annealing. The La65Co35 binder increased the 1:13 phase content, and the alpha-Fe phase formed and disappeared during annealing. The sample annealed for 0.5 h showed a distinct core-shell structure, desirable table-like (-Delta S-M) -T curve, and higher RC value. The diffusion of Co was hindered by the growth of La5Si3 phase. Samples annealed for 24 h achieved larger (-Delta S-M)(max) and (sigma(bc))(max) values. The method combining SPS and diffusion annealing is promising for preparing La-Fe-Si based magnetocaloric composites with good properties.
MATERIALS RESEARCH BULLETIN
(2023)
Article
Physics, Applied
Bang Zhou, Wei Li, Lin Wen, Chengyuan Xu, Xuefeng Liao, Jinbo Wei, Yu Pan, Xiaolian Liu, Song Fu, Lizhong Zhao, Hongya Yu, Xichun Zhong, Xuefeng Zhang, Zhongwu Liu
Summary: This study introduces the non-rare earth element Ge into Ce, La, and Y-based RE-Fe-B nanocrystalline alloys, successfully enhancing their magnetic properties. The (BH)(max) of 65.6 kJ/m(3) and H-cj of 346 kA/m are achieved in the [(Ce0.8La0.2)(0.5)Y-0.5](16)Fe77.5B6Ge0.5 alloy. The improvement is attributed to the increased content of the hard magnetic RE2Fe14B phase with refined grain size, which is confirmed by micromagnetic simulation. Ge addition effectively suppresses the laves phase by forming the Ce5Ge3 phase with the lowest formation energy. This work clarifies the positive role of Ge in enhancing the H-ci and (BH)(max) of nanostructured (Ce,La,Y)-Fe-B alloys.
APPLIED PHYSICS LETTERS
(2023)
Article
Materials Science, Ceramics
Weijie Zhong, Hanlin Peng, Dongling Jiao, Wanqi Qiu, Zhongwu Liu, Wenyong Xu, Zhou Li, Guoqing Zhang
Summary: This study investigates and compares the cooling rate, surface morphology, and microstructure of nickel-based super-alloy powders produced by atomization with argon and nitrogen. The results reveal that the FCC structured γ-phase and γ'-strengthening phase are the main phases in atomized powders of both gases, with no apparent nitride or oxide detected on the powder surface. The powders atomized by argon exhibit higher sphericity and smoother surfaces compared to those atomized by nitrogen, while nitrogen-atomized powders have more split particles. The cooling rate significantly affects the surface characteristics of the powder, with nitrogen-atomized powders showing higher cooling rates and lower secondary dendrite arm spacing compared to argon-atomized powders.
POWDER METALLURGY AND METAL CERAMICS
(2023)
Article
Chemistry, Physical
Xiangyi Liu, Bang Zhou, Bin Yuan, Zhongwu Liu
Summary: The magnetic properties of magnetic nanocomposites consisting of hard and soft magnetic phases depend on both intrinsic properties and the grain structure and volume ratio of the two phases. The grain size has a greater effect on the magnetic properties compared to the volume fraction of the hard magnetic phase. The effects of phase ratio and grain size on magnetic properties have been verified by experiments.
Article
Environmental Sciences
Gulzar Ahmed, Adeel Rasheed, Khurram Shahzad Munawar, Satesh Bandaru, Javid Khan, Zhongwu Liu, Muhammad Sheraz Ahmad
Summary: A novel ZnO-MoO3-ZnMoO3@graphene GZM composite catalyst was prepared for personal protective equipment textiles (PPE) by microwave hydrothermal process. The results showed that the GZM with defect vacancy sites displayed significantly superior inactivation of E. coli bacteria compared to GZM without lower defect vacancy sites and electron densities. Photocatalytic activated oxidation by the GZM composites coatings proceeded in acceptable times and bacterial inactivation occurred within 3 hours. DFT calculations and Fourier mapping confirmed the importance of defect sites in the GZM for bacterial inactivation. The study demonstrated the potential of GZM-PPE for practical applications.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Wenbing Fan, Bang Zhou, Jiayi He, Xuefeng Liao, Yaxiang Wu, Hongya Yu, Jiangxiong Wei, Zhongwu Liu
Summary: To inhibit the magnetic dilution effect of Ce in Nd-Ce-Fe-B magnets, a dual-alloy method is employed to prepare hot-deformed dual-main-phase (DMP) magnets using mixed nanocrystalline Nd-Fe-B and Ce-Fe-B powders. The lattice parameters of the RE2Fe14B (2 : 14 : 1) phase exhibit non-linear variation with the increasing Ce-Fe-B content due to the mixed valence states of Ce ions. The magnetic properties of DMP Nd-Ce-Fe-B magnets almost decrease with the increase of Ce-Fe-B addition, but the magnet with 10 wt% Ce-Fe-B addition exhibits improved intrinsic coercivity and temperature coefficients of remanence and coercivity compared to the single-main-phase Nd-Fe-B magnet.
Article
Materials Science, Multidisciplinary
Shiying Chen, Jiali Cao, Jiayi He, Huixin Zeng, Hongya Yu, Zhongwu Liu
Summary: The study proposes a strategy to enhance both the magnetic and mechanical properties of permanent magnets by grain boundary diffusion (GBD) and validates its effectiveness through experiments. GBD improves the grain boundary phase, strengthens the connection of the magnet, and hinders crack propagation, thus enhancing the mechanical properties.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2023)
