无机材料学报2012，Vol.27Issue(4)：353-357,5.DOI:10.3724/SP.J.1077.2012.00353
无压浸渗法制备氧化态SiC颗粒增强铝基复合材料
Fabrication of Oxidized SiC Particles Reinforced Aluminum Matrix Composite by Pressureless Infiltration Technique
摘要
Abstract
The oxidation behavior of SiC particles in the temperature range from l000℃ to 1200℃ was investi-gated. The dependence of weight gain and oxidation time was parabolic and the oxidation behavior was controlled by diffusion process, with a oxidation activation energy of 219 kJ/mol. Using oxidized SiC particles as reinforce-ment and aluminum alloy containing Si and Mg as matrix, a SiCp/Al composite was fabricated by pressureless infil-tration technique. The microstructure and interfacial morphology were analyzed and the pressureless infiltration mechanisms were discussed. The particles were distributed uniformly in the composite, without particles agglom-eration. Interfacial reactions were found in the composite and the product was identified as MgAl2O4, formed by the reactions between surface oxide layer of SiC particles and Mg, Al in the matrix. The interfacial reactions enhanced the wettability and promoted the spontaneous infiltration process.关键词
SiC颗粒/氧化/无压浸渗/界面反应Key words
SiC particles/oxidation/pressureless infiltration/interfacial reaction分类
通用工业技术引用本文复制引用
张强,姜龙涛,武高辉..无压浸渗法制备氧化态SiC颗粒增强铝基复合材料[J].无机材料学报,2012,27(4):353-357,5.基金项目
教育部留学回国人员科研启动基金 （）
