High-temperature Oxidation Behavior of NbZrTiTa High-entropy Alloy

被引：0

作者：

Wang Ruixin ^{[1
]}

Tang Yu ^{[1
]}

Li Yongyan ^{[1
]}

Ai Yuanlin ^{[1
]}

Li Shun ^{[1
]}

Zhu Li'an ^{[1
]}

Ye Yicong ^{[1
]}

Bai Shuxin ^{[1
]}

机构：

[1] Natl Univ Def Technol, Changsha 410073, Peoples R China

来源：

RARE METAL MATERIALS AND ENGINEERING | 2020年 / 49卷 / 07期

关键词：

high-entropy alloy; microstructure; high-temperature oxidation; oxidation behavior; NbZrTiTa; MICROSTRUCTURE;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The high-temperature oxidation behavior of NbZrTiTa high-entropy alloy (HEA) was characterized by cyclic oxidation test, XRD and SEM. The results reveal that the oxidation kinetics curve of NbZrTiTa HEA in the temperature range of 1000 similar to 1400 degrees C satisfies the parabolic law. The oxidation rate constant and oxidation activation energy achieve 1.1x10(-7)similar to 1.0x10(-6) g(2).cm(-4).s(-1) and 97 kJ/mol, respectively. The oxidation type is internal oxidation. During high-temperature oxidation, oxygen diffuses along the TiZr-rich region with the severe lattice distortion and a large number of dislocations, and then reacts with the metal components to form unsaturated oxides and saturated oxides sequentially. Because of the high activity of constituent elements and the severe lattice distortion, NbZrTiTa HEA displays an extremely high oxidation activity, thus exhibiting strong potential as structure energetic material.

引用

页码：2417 / 2424

页数：8

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