烧结工艺对SiC_P/Al复合材料性能的影响  

Effect of Sintering Process on Properties of SiC_P/Al Composite

作　　者：苟亚楠[1] 马立群[2] 洪凤龙[2] 丁毅[2] 

机构地区：[1]南京工业大学材料科学与工程学院,江苏南京210009 [2]南京工业大学,江苏南京210009

出　　处：《热加工工艺》2012年第2期129-132,共4页Hot Working Technology

摘　　要：通过机械球磨法制备了SiCP/Al复合材料,采用粒径分析研究了复合粉末的粒度变化以及最优化的球磨时间。对复合粉末进行压片烧结处理,研究了烧结温度和保温时间对复合材料物相、形貌与性能的影响。结果表明:该复合材料的性能受烧结温度与保温时间的影响显著,烧结温度过高或保温时间过长会使材料过烧,晶粒发生异常长大,使该复合材料的硬度、电阻率和气孔率降低;烧结工艺为550℃×2 h时,该复合材料的硬度、电阻率和气孔率最佳。SiCP/Al composite was prepared by mechanical milling.The granularity change of composite powders and milling time was optimized by particle size analysis.SiCP/Al composite powders were pressed and sintered,and then the effects of sintering temperature and time on the phase,morphology and properties of the composite were studied.The experimental results demonstrate that too high sintering temperature or too long sintering time can result in the overheating of material,and the abnormally growth of grains,and then the performance of the composite reduces.When the sintering temperature is 500 ℃,and sintering time is 2 h,the hardness,resistivity and gas porosity of the composite is most excellent.

关 键 词：机械球磨 SICP/AL复合材料 烧结 

分 类 号：TG376.3[金属学及工艺—金属压力加工]