Deposition of a B-modified silicide coating for Nb-Si based alloy oxidation protection

被引：51
作者：
Shao, Wei [1 ]
Wang, Wan [1 ]
Zhou, Chungen [1 ]
机构：
[1] Beijing Univ Aeronaut & Astronaut, Dept Mat Sci & Engn, Minist Educ, Key Lab Aerosp Mat & Performance, Beijing 100191, Peoples R China
来源：
CORROSION SCIENCE | 2016年 / 111卷
基金：
中国国家自然科学基金;
关键词：
Intermetallics; Metal coatings; Superalloys; Oxidation; PACK-CEMENTATION METHOD; ULTRAHIGH TEMPERATURE ALLOY; DIFFUSION COATINGS; DEGREES-C; RESISTANCE; BEHAVIOR; MICROSTRUCTURE; GROWTH; INTERMETALLICS; COMPOSITES;
D O I：
10.1016/j.corsci.2016.06.020
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A B-modified silicide coating was prepared on the Nb-Si based alloy by Si-TiB2 co-deposition at 1300 degrees C for 10 h. The results show that the two-layer coating is composed of a (Nb, X)Si-2 (X represents Al, Cr, Ti and Hf) + NbTiB4 outer layer and a (Nb, X)Si-2 + Cr2Nb inner layer. Static oxidation tests indicate that the mass gain of B-modified silicide coating was 2.39 mg/cm(2) after oxidation at 1250 degrees C for 100 h. The good oxidation resistance is attributed to the formation of a continuous and dense scale mainly consisting of glassy borosilicate. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：786 / 792
页数：7
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