MICROSTRUCTURE AND PROPERTIES OF TiC_p/Al COMPOSITE FABRICATED BY CONTACT REACTION METHOD AND SEMISOLID EXTRUSION

来源期刊：中国有色金属学报(英文版)1997年第2期

论文作者：Luo Shoujing Sun Jiakuan

文章页码：114 - 118

Key words：composite; microstructure; properties; semisolid; extrusion

Abstract: The microstructure and properties were experimentally examined of TiC particle reinforced Al alloy composite (TiCp/LY12) fabricated by the Contact Reaction Method (CRM) and immediately followed semisolid extrusion. It was found that the microstructure of TiCp/LY12 composite is characterized by a well densified matrix free from microvoids, uniformly distributed TiC particles with approximately spherical shape and about 1μm in diameter, no fracture of TiC particles and some banding and realignment of TiC particles along the extrusion direction. It was also found that the mechanical properties (E,σ_0.2 ,σ_b) of the composite increase simultaneously with increasing volume fraction(V_p) of TiC particles while the elongation(δ) is still maintained at a relatively high level. Additionally, the reasons for the above observations were revealed.