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无机材料学报

无机材料学报

• 研究论文 • 上一篇    下一篇

Al2O3微粉的表面改性及表征

于志强; 武高辉; 孙东立; 姜龙涛   

  1. 哈尔滨工业大学材料科学与工程学院 哈尔滨 150001
  • 收稿日期:2002-09-23 修回日期:2002-10-10 出版日期:2003-11-20 网络出版日期:2003-11-20

Surface Modification and Characterization of Al2O3 Micropowder

YU Zhi-Qiang; WU Gao-Hui; SUN Dong-Li; JIANG Long-Tao   

  1. School of Materials Science and Engineering; Harbin Institute of Technology; Harbin 150001; China
  • Received:2002-09-23 Revised:2002-10-10 Published:2003-11-20 Online:2003-11-20

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摘要： 以α-Al2O3微粉为基体,Y(NO3)3水溶液为包裹相,采用液相包裹法进行加钇颗粒表面改性.获得了表面均匀包裹Y2O3的α-Al2O3粉体.将此粉体与Al合金复合制备复合材料.复合材料组织更加均匀.对材料进行力学性能测试,结果表明:改性粉体对Al合金增强效果明显增加,抗拉强度提高27.2％;屈服强度提高33.1％,延伸率提高10.3％.

关键词: 表面改性, 液相颗粒包裹, 微粉, Al2O3/Al复合材料, 组织性能

Abstract: α-Al2O3 micropowder with the even coating of Y2O3 was obtained in such an experiment by
using　α-Al2O3 powder as base material and Y(NO3)3 solution as coating phase through the liquid phase coating method. The aluminium matrix
composite reinforced by α-Al2O3 particles modified by Y2O3 was fabricated. The microstructure of the composite is more even. The mechanical properties testing indicates that the strengthening effect of
the modified-Al2O3 porticles on the Al alloy is improved obviously and the tensile strength of the composites increases by 27.2%, yield strength increases
by 33.1%, and the elongation increases by 10.3%.

Key words: surface modification, liquid phase particle coating, micropowder, Al2O3/Al compos- ite, microstructure and mechanical properties

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