A long-term ultrahigh temperature application of layered silicide coated Nb alloy in air

被引：28

作者：

Sun, Jia ^{[1
,2
]}

Fu, Qian-Gang ^{[1
]}

Li, Tao ^{[1
]}

Wang, Chen ^{[1
]}

Huo, Cai-Xia ^{[1
]}

Zhou, Hong ^{[1
]}

Yang, Guan-Jun ^{[3
]}

Sun, Le ^{[1
]}

机构：

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

[2] Tech Univ Darmstadt, Inst Mat Wissensch, Jovanka Bontschits Str 2, D-64287 Darmstadt, Germany

[3] Xi An Jiao Tong Univ, Sch Mat Sci & Engn, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2018年 / 439卷

基金：

中国国家自然科学基金;

关键词：

Molybdenum silicide; Coatings; Oxidation resistance; Diffusion; OXIDATION RESISTANCE; PACK CHEMISTRY; NIOBIUM ALLOY; SI; BEHAVIOR; MICROSTRUCTURE; COATINGS; COMPOSITE; INTERDIFFUSION; DIFFUSION;

D O I：

10.1016/j.apsusc.2018.01.114

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：

Nb-based alloy possessed limited application service life at ultrahigh temperature (> 1400 degrees C) in air even taking the effective protective coating strategy into consideration for last decades. In this work a long duration of above 128 h at 1500 degrees C in air was successfully achieved on Nb-based alloy thanked to multi-layered silicide coating. Through optimizing interfaces, the MoSi2/NbSi2 silicide coating with Al2O3-adsorbed-particles layer exhibited three-times higher of oxidation resistance capacity than the one without it. In MoSi2-Al2O3-NbSi2 multilayer coating, the Al2O3-adsorbed-particles layer playing as an element-diffusion barrier role, as well as the formed porous Nb5Si3 layer as a stress transition zone, contributed to the significant improvement. (C) 2018 Elsevier B.V. All rights reserved.

引用

页码：1111 / 1118

页数：8

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