Improvement in oxidation resistance of suicide coating on an Nb-Ti-Si based ultrahigh temperature alloy by second aluminizing treatment

被引：33

作者：

Zhang, Ping ^{[1
]}

Guo, Xiping ^{[1
]}

机构：

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

来源：

CORROSION SCIENCE | 2015年 / 91卷

基金：

中国国家自然科学基金;

关键词：

Metal coatings; Intermetallic; Oxidation; MODIFIED SILICIDE COATINGS; PHASE-DIAGRAM; AL; CR; MICROSTRUCTURE; CODEPOSITION; COMPOSITES; DEPOSITION; BEHAVIOR; GROWTH;

D O I：

10.1016/j.corsci.2014.11.009

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Modified suicide coating was prepared on an Nb-Ti-Si based alloy by a two-step pack cementation process including first siliconizing and then aluminizing. The two-step coating is composed of an Al-rich outermost layer, a (Nb,X)Si-2 outer layer and a (Ti,Nb)(5)Si-4 inner layer. The coating possesses an enhanced oxidation resistance at 1250 degrees C due to the presence of the Al-rich outermost layer. The mass gain of the coating after oxidation at 1250 degrees C for 100 h is 3.7 mg/cm(2), and a duplex scale consisting of an Al2O3 outer layer and a SiO2-matrix inner layer forms. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：101 / 107

页数：7

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