Oxidation of Al2O3-30%TiCN-0.2%Y2O3 Composite
来源期刊：JOURNAL OF RARE EARTHS2005年第3期
论文作者：Yan Changhao Li Xikun Xiu Zhimeng SUN Xudong QIU Guanming Dai Shaojun
Key words：composite; Al2O3-30％TiCN-0.2％Y2O3; oxidation behavior; bend strength; parabolic law; residual stress; rare earths;
Abstract: The oxidation behavior of Al2O3-30%TiCN-0.2%Y2O3 composite and its effect on high temperature bending strength was studied. The result indicates that the mass gain during static oxidation of the material under normal atmosphere follows the parabolic law. Oxide increases with increasing temperature and prolonging time. It has good oxidation resistance. The product of oxidation of the material is TiO2. Therefore, the volume of the material expands. The oxide film is destroyed because residual stress inside the oxide film is released. Proper oxidation is beneficial to the improvement of bending strength of Al2O3-30%TiCN-0.2%Y2O3 composite. The strength increase is up to 4.5%.
Yan Changhao1，Li Xikun2，Xiu Zhimeng3，SUN Xudong3，QIU Guanming1，Dai Shaojun1
(1.Nanjing University of Technoloy, Nanjing 210009, China;
2.Shenyang University of Science and Techology, Shenyang 110168, China;
3.School of Materials and Metallurgy Northeastern University, Shenyang 110004, China;
4.Changchun University of Science and Technology, Changchun 130022, China)
Abstract:The oxidation behavior of Al2O3-30%TiCN-0.2%Y2O3 composite and its effect on high temperature bending strength was studied. The result indicates that the mass gain during static oxidation of the material under normal atmosphere follows the parabolic law. Oxide increases with increasing temperature and prolonging time. It has good oxidation resistance. The product of oxidation of the material is TiO2. Therefore, the volume of the material expands. The oxide film is destroyed because residual stress inside the oxide film is released. Proper oxidation is beneficial to the improvement of bending strength of Al2O3-30%TiCN-0.2%Y2O3 composite. The strength increase is up to 4.5%.
Key words:composite; Al2O3-30％TiCN-0.2％Y2O3; oxidation behavior; bend strength; parabolic law; residual stress; rare earths;
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