材料期刊网

PHASES AND STRUCTURE OF PREFORM DURING PREPARING PROCESS OF Al/TiCp COMPOSITES BY DIRECT REACTION SYNTHESIS

S. Y Zeng , B. Yang and E.L. Zhang(Harbin Institute of Technology , Harbin 150001 , China)M.Z. Ma(Jiamusi University , Jiamusi 154002 , China Manuscript received 26 August 1996)

金属学报(英文版)

Direct reaction synthesis(DRS), based on the principle of self-propagating hightemperature synthesis (SHS), is a new method for preparing particulate metal matrix composites (PMMCs). The effects of the temperature of the aluminum melt and the aluminum content in the preform on the phases and structure of the reacted preform have been investigated by X-ray diffraction and scanning electron microscopy.It has been shown that TiC phase is prone to be synthesized with the increasing of the temperature of the aluminum melt and the decreasing of the aluminum powder content in the preform, and that the size of TiC particle becomes fine with the increasing of the temperature and the decreasing of the aluminum powder content.

关键词: :direct reaction synthesis , null , null