Comparison of two kinds of Si-B-Y co-deposition coatings on an Nb-Ti-Si based alloy by pack cementation method

被引：25

作者：

Qiao, Yanqiang ^{[1
]}

Kong, Jianping ^{[1
]}

Li, Qi ^{[1
]}

Guo, Xiping ^{[1
]}

机构：

[1] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Shaanxi, Peoples R China

来源：

SURFACE & COATINGS TECHNOLOGY | 2017年 / 327卷

基金：

中国国家自然科学基金;

关键词：

Silicide coating; High-temperature alloys; Intermetallic; Oxidation; Pack cementation; ULTRAHIGH-TEMPERATURE ALLOY; MODIFIED SILICIDE COATINGS; OXIDATION RESISTANCE; PROTECTIVE-COATINGS; SUICIDE COATINGS; NIOBIUM ALLOYS; ELECTRON-BEAM; DEGREES-C; 1023; K; BEHAVIOR;

D O I：

10.1016/j.surfcoat.2017.07.013

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Two kinds of Si-B-Y co-deposition coatings on an Nb-Ti-Si based alloy were prepared by pack cementation method and their microstructure and oxidation behavior were investigated. Results indicated that the coating prepared with higher B content in the pack was comprised of a porous NbB2 outer layer, a NbSi2 intermediate layer and a transitional layer, while the coating prepared with less B content in the pack consisted of a NbSi2 outer layer with NbB2 dispersed in its upper part and a transitional layer. The oxidation tests showed that both the coatings can provide a good protection at 850 degrees C within 100 h. However, the coating prepared with higher B was non-protective at 1250 degrees C, and the formed scale was brittle and can peel off easily. The coating prepared with less B content exhibited a good oxidation resistance at 1250 degrees C, which should be attributed to the compactness of the coating, a proper B content and the Y elements in the coating. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：93 / 100

页数：8

共 44 条

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[28] Si-Al-Y Co-deposition Coatings Prepared on Ti-Al Alloy for Enhanced High Temperature Oxidation Resistance
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[29] Si-Al-Y Co-deposition Coatings Prepared on Ti-Al Alloy for Enhanced High Temperature Oxidation Resistance
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[30] Si-Al-Y Co-deposition Coatings Prepared on Ti-Al Alloy for Enhanced High Temperature Oxidation Resistance
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