Microstructure evolution of Ni-rich NiTi(-Hf) alloy during thermal oxidation at different temperatures

被引：4
|
作者：
Li, B. [1 ]
Zheng, L. J. [1 ]
Chen, X. M. [2 ]
Zhang, H. [1 ]
机构：
[1] Beihang Univ, Res Inst Frontier Sci, Beijing 100191, Peoples R China
[2] Beihang Univ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China
来源：
MATERIALS CHEMISTRY AND PHYSICS | 2023年 / 295卷
基金：
中国国家自然科学基金;
关键词：
Ni-rich NiTi alloy; Oxidation mechanism; Spallation; Wide temperature range; SURFACE OXIDATION; HARDENING BEHAVIOR; ADDITIONS; NB;
D O I：
10.1016/j.matchemphys.2022.127114
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The oxidation behavior of Ni-rich NiTi(-Hf) alloy at the temperature range from 400 to 950 degrees C is investigated in this paper. For Ni-rich NiTi alloy, the results show that the oxidation kinetics follow the logarithmic law at 400 degrees C and obey the parabolic law from 500 to 950 degrees C. After high-temperature oxidation, the observed multilayered scale structure consists of TiO2+Ti2O3+NiTiO3, Ni(Ti)+Ti2O3+rich Ti, and Ni3Ti from outside to the inside. The addition of the Hf element improves the high-temperature oxidation resistance. A schematic oxidation mechanism of Ni-rich NiTi(-Hf) alloy is proposed to explain the observed results.
引用
收藏
页数：13
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