Impact of annealing on structural and corrosion resistance properties of Ti_(20)Zr_(20)Hf_(20)Be_(20)Ni_(20)high-entropy metallic glass  

作　　者：Ke-Ran Li Pan Gong Dong-Liang Wang Cheng Zhang Hu Huang Muhammad Yasir Mao Zhang Xin-Yun Wang 

机构地区：[1]State Key Laboratory of Materials Processing and Die&Mould Technology,School of Materials Science and Engineering,Huazhong University of Science and Technology,Wuhan,430074,China [2]Research Institute of Huazhong University of Science and Technology in Shenzhen,Shenzhen,518057,China [3]Key Laboratory of CNC Equipment Reliability,Ministry of Education,School of Mechanical and Aerospace Engineering,Jilin University,Changchun,130022,China [4]Department of Materials Science&Engineering,Institute of Space Technology,Islamabad,44000,Pakistan

出　　处：《Rare Metals》2025年第1期565-580,共16页稀有金属(英文版)

基　　金：supported by the National Key R&D Program of China(No.2021YFE0100600);the National Natural Science Foundation of China(No.52371154);Guangdong Basic and Applied Basic Research Foundation(No.2023A1515012158);the Opening Project of the Key Laboratory of CNC Equipment Reliability,Ministry of Education,Jilin University(No.JLU-cncr-202307);the Knowledge Innovation Program of Wuhan-Basic Research(No.2022010801010087).

摘　　要：This study comprehensively investigates the effects of annealing on the structural,electrochemical properties and passivation film characteristics of Ti_(20)Zr_(20)Hf_(20)Be_(20)Ni_(20)(at%)high-entropy metallic glass(HE-MG).Subjected to various annealing temperatures,the samples were analyzed in a 3.5 wt%NaCl solution to evaluate changes in their microstructure and assess their corrosion resistance.Findings reveal that the HE-MG undergoes multistage crystallization,displaying an amorphous matrix integrated with face centered cubic(FCC)and Ni_(7)Zr_(2)phases between 420 and 500℃,indicating robust thermal stability.Electrochemical assessments identify a critical temperature threshold:Below the glass transition temperature(Tg),the HE-MG maintains excellent corrosion resistance,promoting stable passivation layers.Above Tg,enhanced long-range atomic rearrangement during relaxation increases passivation layer defects and significantly diminishes corrosion resistance.X-ray photoelectron spectroscopy(XPS)analyses show that the primary components of the passivation layer are TiO_(2),ZrO_(2),HfO_(2)and BeO.Increased annealing temperatures lead to enhanced Be and Ni content and decreased Ti,Zr and Hf.Additionally,high mixing entropy and significant atomic size mismatch suppress long-range atomic rearrangement and crystallization.The crystallization begins above Tg by_(20)℃,with crystalline phases evenly distributed within the matrix without drastically affecting corrosion resistance.This investigation highlights the impact of thermal treatment on the properties of HE-MG,contributing valuable insights into optimizing their performance and applications.

关 键 词：High-entropy metallic glass ANNEALING Corrosion resistance Glass transition temperature CLUSTER 

分 类 号：TG1[金属学及工艺—金属学]