Deposition of Cr-modified silicide coatings on Nb-Si system intermetallics

被引：46

作者：

Chen, Chen ^{[1
]}

Zhou, Chungen ^{[1
]}

Gong, Shengkai ^{[1
]}

Li, Shusuo ^{[1
]}

Zhang, Yue ^{[1
]}

Xu, Huibin ^{[1
]}

机构：

[1] Beijing Univ Aeronaut & Astronaut, Sch Mat Sci & Engn, Beijing 100083, Peoples R China

来源：

INTERMETALLICS | 2007年 / 15卷 / 5-6期

关键词：

diffusion; oxidation; coatings; intermetallic and otherwise; vapour deposition; microstructure;

D O I：

10.1016/j.intermet.2006.10.033

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In order to improve the oxidation resistance of Nb-Si system intermetallics, silicide was deposited on the substrate by molten salt or by pack cementation, and Cr was deposited by pack cementation. Phase and microstructure were observed by scanning electro microscope (SEM), X-ray diffraction (XRD) and energy diffusion spectrum (EDS). It was found that phases of NbSi2, CrSi2, Cr2Nb were formed. The result showed that the high temperature oxidation resistance of the Nb-Si system intermetallics will be improved by applying the Cr doped Si coatings. Maybe it was attributed by the formation of SiO2 and Cr2O3 which Could prevent the penetration of oxygen into the inner coatings and the substrate. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：805 / 809

页数：5

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