硅酸盐学报2007，Vol.35Issue(10)：1337-1341,5.
SiCp/Al复合材料的自发熔渗机理
SPONTANEOUS INFILTRATION MECHANISM FOR SiCp/Al COMPOSITES
摘要
Abstract
SiCp/Al composites with high SiC content were prepared by spontaneous infiltration of liquid aluminum into oxidized SiC powder compact enhanced by adding magnesium. The infiltration mechanism was studied by inspecting the infiltration height of liquid aluminum in the pressed block of SiC powder versus temperature and time in the course of infiltration. SiCp/Al composites were analyzed by X-ray diffraction, energy dispersive spectroscopy and metallographic analysis. The results show that the liquid-solid interface reaction at the infiltration front enhances the wettability of the system, which leads to spontaneous infiltrating of liquid aluminum into the porous SiC powder bed. The infiltration height increases parabolically with time. The activation energy for infiltration is about 166 kJ/mol, which suggests that the infiltration procedure is controlled by an interface reaction. The oxidized SiC particles are distributed uniformly with clean boundaries in the metal matrix and no Al4C3 present in the composites.关键词
碳化硅/铝复合材料/自发熔渗/界面反应Key words
silicon carbide/aluminum composites/ spontaneous infiltration/ interface reaction分类
通用工业技术引用本文复制引用
刘君武,郑治祥,王建民,汤文明,吕君,徐光青..SiCp/Al复合材料的自发熔渗机理[J].硅酸盐学报,2007,35(10):1337-1341,5.基金项目
合肥工业大学科学研究发展基金(103-037508) （103-037508）
合肥工业大学院士基金(204-035014)资助项目. （204-035014）
