Oxidation behaviour of a Ge-modified silicide coating on an Nb-Si based alloy in the moderate temperature range

被引：32
|
作者：
Wang, Changliang [1 ]
Shao, Wei [1 ,2 ]
Wang, Wan [1 ]
Zhou, Chungen [1 ]
机构：
[1] Beijing Univ Aeronaut & Astronaut, Dept Mat Sci & Engn, Beijing 100191, Peoples R China
[2] Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100124, Peoples R China
来源：
CORROSION SCIENCE | 2020年 / 163卷
基金：
国家重点研发计划; 中国国家自然科学基金;
关键词：
Intermetallics; Oxidation; Selective oxidation; MECHANICAL-PROPERTIES; TI; CR; AL; MICROSTRUCTURE; RESISTANCE; MO; HF; COMPOSITES; DEPOSITION;
D O I：
10.1016/j.corsci.2019.108249
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The oxidation characteristics of Ge-modified silicide coating on the Nb-Si based alloy within the moderate temperatures were investigated. Results show that the mass gains of the coated alloys are 0.41, 0.58 and 0.37 mg/cm(2) after oxidation at 700 degrees C, 750 degrees C and 800 degrees C for 100 h. There is no pest phenomenon at the test temperatures. The oxide scale is composed of amorphous aluminosilica and SiO2-GeO2 with TiO2 dispersed in some of SiO2-GeO2. The good oxidation resistance of the Ge-modified silicide coating at moderate temperatures is attributed to the selective oxidation of Ti and Si, as well as the formation of glassy SiO2-GeO2.
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页数：8
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