【作者】 张广安； 杜之明； 罗守靖；

【Author】 Zhang Guang-an DuZhi-ming Luo Shou-jing School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China

【机构】 哈尔滨工业大学材料科学与工程学院；

【摘要】 短碳纤维增强铝基复合材料,具有工艺简单、界面反应易于控制,制件具有较好的各向同性性能等特点,并可以进行二次塑性加工,直接成形各种形状的零件。但常规的固态塑性加工,会使增强碳纤维发生断裂,影响增强效果。本文采用M40石墨纤维和LY12合金,挤压浸渗后半固态下直接充填成形,制备了短碳纤维增强铝基复合材料。研究了半固态加工对材料的组织与性能的影响及与固态塑性成形的区别。结果表明:半固态下加工,碳纤维的就位长度明显高于固态加工。材料强度也有较大的提高。更多还原

【Abstract】 Short carbon reinforced aluminum matrix composite materials, which have the characteristics of simplified processing, easily controlled of interfacial reaction and good isotropy properties et al., can be re-performed to make varieties of parts directly. Whereas ordinary plasticity forming in solid state will make a bad effect on reinforcement due to the fracture of reinforced short carbon fibers. Short carbon fibers reinforced aluminum matrix composite materials are formed immediately after squeezing-infiltrating process in semi-solid state, M40 carbon fibers and LY12 alloys are used as raw materials in the paper. The influences of semi-solid forming on the materials microstructures and properties, and the difference between semi-solid forming and solid plasticity forming have been studied. The results show that the length of carbon fibers in semi-solid forming is higher than that of solid forming obviously. Moreover the strength has increased a lot in semi-solid state.更多还原