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

被引：22

作者：

Yang, Kai ^{[1
]}

Feng, Jingwei ^{[2
]}

Zhou, Xiaming ^{[1
]}

Tao, Shunyan ^{[1
]}

机构：

[1] Chinese Acad Sci, Key Lab Inorgan Coating Mat, Shanghai 200050, Peoples R China

[2] Chinese Acad Sci, Shanghai Inst Ceram, Inorgan Mat Anal & Testing Ctr, Shanghai 200050, Peoples R China

来源：

JOURNAL OF THERMAL SPRAY TECHNOLOGY | 2012年 / 21卷 / 05期

基金：

中国博士后科学基金;

关键词：

Al2O3-Cr2O3 composite coatings; microstructure; plasma spraying; strengthening-toughening mechanism; transmission electron microscopy (TEM); AL2O3; COATINGS; CORROSION BEHAVIOR; CERAMIC COATINGS; ALUMINA COATINGS; OXIDE COATINGS; RESISTANCE; TOUGHNESS; CHROMIA;

D O I：

10.1007/s11666-012-9796-4

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

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.

引用

页码：1011 / 1024

页数：14

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