Microstructural Characterization and Strengthening-Toughening Mechanism of Plasma-Sprayed Al2O3-Cr2O3 Composite Coatings

被引：0
作者：
Kai Yang
Jingwei Feng
Xiaming Zhou
Shunyan Tao
机构：
[1] Chinese Academy of Sciences,The Key Laboratory of Inorganic Coating Materials
[2] Chinese Academy of Sciences,Shanghai Institute of Ceramics
[3] Chinese Academy of Sciences,Inorganic Materials Analysis and Testing Center, Shanghai Institute of Ceramics
来源：
Journal of Thermal Spray Technology | 2012年 / 21卷
关键词：
Al; O; -Cr; O; composite coatings; microstructure; plasma spraying; strengthening-toughening mechanism; transmission electron microscopy (TEM);
D O I：
暂无
中图分类号：
学科分类号：
摘要：
In this study, Al2O3, Cr2O3, and Al2O3-Cr2O3 coatings were fabricated by plasma spraying. X-ray diffraction was employed to determine the phase composition of powders and coatings. The morphologies and microstructures of the coatings were characterized using electron probe microanalyzer and transmission electron microscopy. Vickers hardness, fracture toughness, and bending strength of the coatings were measured. Al2O3-Cr2O3 composite coatings show better comprehensive mechanical properties than the individual Al2O3 and Cr2O3 coatings, which are attributed to the former's larger intersplat adhesion or interlamellar cohesion and lower porosity. Solid solution strengthens the phase interfaces and grain boundaries, which is beneficial to improve the mechanical performance of the composite coatings.
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页码：1011 / 1024
页数：13
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