| Because composite materials are light, specific stiffness, high specific strength, high shear strength, good electrical and thermal conductivity, good abrasion resistance, organic liquid erosion resistance, Lower preparation cost, and can be processed through hot pressing method, heat extrusion method, hot rolling method,also, Reinforcement uniformly dispersed in the matrix and have isotropic, composite materials have a very extensive application prospects, this study use high-energy ball milling mixing method for mixing materials. SiCp/Al were prepared by cold isostatic pressing, sintering atmosphere of argon and spark plasma sintering. Also, observe the microstructure of composite specimens and measured their mechanical properties. In order to improve the wettability of silicon carbide and aluminum body, distributed Silicon carbide uniformly in the Al matrix, Reduce adverse interface reactions. play to enhance the effectiveness of SiCp,thesis use Pre oxidation treatment and Pickling, whose effect is very obvious.In the process of high energy ball milling, the volume content, the milling time and ball milling speed are the main process parameters for affecting mixed powder quality. Experimental results show:the milling time of SiCp/Al is 3h.the best of milling parameter is 200r/min.In the sintering process of Cold isostatic pressing and argon atmosphere:remain 30min under 3.5MPa; rise to 640℃ at a heating rate of 5℃/min in the end; keep the temperature for 2h at 640℃; And made of SiCp/Al composite materials with the nature cooling. Under this condition, I get the best method of making SiCp/Al composite materials:heat to 500℃ at the speed of 100℃/min and remain 5 minute using Spark Plasma Sintering under 50MPaThis paper explores the influence of High-energy ball milling, Cold isostatic and Spark Plasma Sintering on the structure and properties of SiCp/Al composite materials. Finally obtains the best technological parameters of preparing SiCp/Al composite material. |
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