Effect of thermodynamically metastable components on mechanical and oxidation properties of the thermal-sprayed MoSi2 based composite coating

被引：33

作者：

Sun, Jia ^{[1
,2
]}

Li, Tao ^{[2
]}

Zhang, Guang-Peng ^{[2
]}

机构：

[1] Tech Univ Darmstadt, Inst Mat Wissensch, D-64287 Darmstadt, Germany

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

来源：

CORROSION SCIENCE | 2019年 / 155卷

基金：

中国国家自然科学基金;

关键词：

MoSi2; Composites; Microstructure; Toughness; Oxidation; HIGH-TEMPERATURE OXIDATION; COATED CARBON/CARBON COMPOSITES; MO-SI; PHASE-STABILITY; BEHAVIOR; MICROSTRUCTURE; RESISTANCE; AL; TOUGHNESS; ALLOYS;

D O I：

10.1016/j.corsci.2019.04.041

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Thermodynamically metastable components in plasma-sprayed MoSi2 based composite coatings were comparatively investigated to reveal their impacts on mechanical performance and oxidation behavior of the freestanding coatings. Metastable components have positively contributed to the improved mechanical and anti-oxidation properties of the as-sprayed coatings. The amorphous domain and nano-Mo phases could be regarded as the reinforcements in terms of the indentation fracture toughness. Upon high-temperature exposure in air, metastable components would be sacrificed by facilitating the better formation of surface protective scale due to the beta -> alpha transformation as well as volatilization of the gaseous Mo-oxides.

引用

页码：146 / 154

页数：9

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