| Surface Oxidation of Al2O3/SiC Nanocomposite： Phase Transformation and Microstructure |
| |
| 引用本文： | 蔡舒 彭珍珍 冯杰 鲁枫. Surface Oxidation of Al2O3/SiC Nanocomposite： Phase Transformation and Microstructure[J]. 中国稀土学报(英文版), 2005, 23(4): 429-432 |
| |
| 作者姓名： | 蔡舒 彭珍珍 冯杰 鲁枫 |
| |
| 作者单位： | School of Material Science and Engineering，Tianjin University，Tianjin 300072，China，School of Material Science and Engineering，Tianjin University，Tianjin 300072，China，School of Material Science and Engineering，Tianjin University，Tianjin 300072，China，School of Material Science and Engineering，Tianjin University，Tianjin 300072，China |
| |
| 基金项目： | 国家高技术研究发展计划(863计划) |
| |
| 摘 要： | The surface oxidation behavior of pressureless sintered Al2O3/SiC nanocomposite was studied from 1000 to 1400 ℃ for more than 10 h in air. Weight gain during the process of heat treatment was measured by TG analysis. Phase transformation and microstructure changes of these specimens due to oxidation were investigated with X-ray diffraction (XRD), SEM and EDX technology. Thermogravimetric analysis show that the weight gain as a result of oxidation of SiC become significant above 1200 ℃. In the range of 1000～1300 ℃, the SiC grits are usually coated with a layer of amorphous silica after oxidation. Above 1300 ℃, the amorphous silica reacted with alumina matrix and formed mullite or crystallized into cristobalite. The rate of oxidation depends on the formation of dense cristobalite film. Large amount of needle-like mullite and alumina crystals are formed on the surface after oxidation at 1400 ℃.
|
| 关 键 词： | Al2O3/SiC 纳米复合材料 表面氧化 热处理 稀土 显微结构 相变 |
| 文章编号： | 1002-0721（2005）04-0429-04 |
| 收稿时间： | 2004-11-10 |
| 修稿时间： | 2005-04-30 |
Surface Oxidation of Al2O3/SiC Nanocomposite: Phase Transformation and Microstructure |
| |
| CAI Shu,PENG Zhenzhen,Feng Jie,Lu Feng. Surface Oxidation of Al2O3/SiC Nanocomposite: Phase Transformation and Microstructure[J]. Journal of Rare Earths, 2005, 23(4): 429-432 |
| |
| Authors: | CAI Shu PENG Zhenzhen Feng Jie Lu Feng |
| |
| Abstract: | |
| |
| Keywords: | nanocomposites surface oxidation heat treatment rare earths |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
