Synthesis and corrosion behavior of Mo15Nb20Ta10Ti35V20 refractory high entropy alloy

被引：26
|
作者：
Gao, Yu [1 ,2 ]
Chong, Kai [3 ]
Qiao, Linjing [3 ]
Li, Yuanxiao [4 ]
Liu, Chang [3 ]
Guo, Fuqiang [3 ]
Wu, Dongting [3 ]
Zou, Yong [5 ]
机构：
[1] Shandong Univ, Shenzhen Res Inst, Shenzhen 518063, Peoples R China
[2] Shandong Univ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Minist Educ, Jinan 250061, Shandong, Peoples R China
[3] Shandong Univ, Sch Mat Sci & Engn, Jinan 250061, Shandong, Peoples R China
[4] Shandong Inst Prod Qual Inspect, Jinan 250102, Shandong, Peoples R China
[5] Shandong Univ, Shandong Engn & Technol Res Ctr Modern Welding, Jinan 250061, Shandong, Peoples R China
来源：
MATERIALS & DESIGN | 2023年 / 228卷
关键词：
High-entropy alloys; Corrosion resistance; Passivation film; Mott-Schottky curve; Transpassivity; ANODIC PASSIVE FILMS; POINT-DEFECT MODEL; 3.5-PERCENT NACL; MECHANICAL-PROPERTIES; STAINLESS-STEEL; MICROSTRUCTURE; MOLYBDENUM; RESISTANCE; SURFACE; AL;
D O I：
10.1016/j.matdes.2023.111820
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The Mo15Nb20Ta10Ti35V20 refractory high entropy alloy with BCC structure was prepared by vacuum arc melting. The synthesized Mo15Nb20Ta10Ti35V20 demonstrated better corrosion resistance compared to 316 stainless steel in chloride corrosion environment, whose better corrosion resistance is attributed to the complex passive film structure and shows the characteristics of passivation-transpassivation-sec ondary passivation on the polarization curve. Mott-Schottky curves analysis and XPS results show that the primary and secondary passive films have different P-N junctions which were composed of different oxides showing bilayer structure characteristics. Through the thermodynamic calculation, the relationship between the competitive growth of multiple principal elements in RHEA were analyzed. The dynamic changes of TiO2 and Ti2O3 contents were responsible for the secondary passivation phenomenon. (C) 2023 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
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页数：15
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