Effects of Particle Size on Microstructure of the Matrix Alloy in Aluminum Matrix Composites
作者单位：Department of Metallurgical Engineering Chiba Institute of Technology Japan Analysis Center of Materials Chiba Institute of Technology Japan
会议名称：《International Conference on Aerospace Materials(ICAM 2006)》
会议日期：2006年
学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）]
关 键 词：Metal matrix composites Al2O3p/Al sub micron Al2O3 particles Microstructure
摘 要：Aluminum matrix composites, reinforced by 0.15μm and 5μm Al2O3 particles with 40% volume fractions were fabricated by squeeze casting technique. The microstructure characterization near the interfaces of Al2O3p/1070Al composites was investigated by SADP and HREM techniques. Results showed that high-density dislocations were generated in the 5μm-Al2O3p/Al composite due to the thermal mismatch stress. In contrast, the matrix of the 0.15μm-Al2O3p/Al composite appeared to be nearly free dislocations and some micro distortion areas of 1-5nm were observed, which was attributed to the dispersion of fine sub-micron particles and uniform distribution of the stress near the interfaces.