粉末热压成形工艺对WCP/2024Al复合材料力学性能的影响  

Effects of Powder Hot-pressing Process on Mechanical Properties of WC_P/2024Al Composites

作　　者：梁秋实[1] 毛昌辉[1] 杨剑[1] 

机构地区：[1]北京有色金属研究总院先进电子材料研究所,北京100088

出　　处：《材料工程》2011年第12期63-67,共5页Journal of Materials Engineering

摘　　要：采用真空热压方法制备了WC颗粒增强2024铝基复合材料(WCp/2024Al),并利用XRD,SEM,拉伸性能测试等检测手段研究了复合材料的热压温度和WC颗粒尺寸对WCp/2024Al复合材料力学性能的影响。结果表明,热压温度是控制复合材料发生界面反应的关键因素之一,并且界面反应所生成的反应产物导致复合材料的强度和塑性下降,使复合材料由韧性断裂向脆性断裂转变,复合材料的抗拉强度随成形温度的提高而降低。WC的颗粒尺寸对WCp/2024Al复合材料的抗拉强度未有显著的影响,但是对塑性影响较大,复合材料的塑性随WC颗粒尺寸增大而提高。2024 aluminum alloy matrix composites reinforced with tungsten carbide particle（WCp/2024Al） were fabricated by vacuum hot-pressing method.The effect of the forming temperature and WC particle size on the mechanical properties of the WCp/2024Al composites were carried by XRD,SEM and tensile testing.The results show that the forming temperature is one of the key factors that control the interfacial reaction of the WCp/2024Al composite.The products of the interfacial reaction lead to the strength and plasticity of the WCp/2024Al composite decline.The effects of WC particle size on the plasticity are more than that effects on the tensile strength of the WCp/2024Al composites.The elongation of the composites increases with the increasing of WC particle size.

关 键 词：复合材料 热压温度 颗粒尺寸 拉伸性能 

分 类 号：TB332[一般工业技术—材料科学与工程]