【作者】 张云鹤； 陈国钦； 修子扬； 武高辉；

【Author】 ZHANG Yun-he1,CHEN Guo-qin2,XIU Zi-yang3,WU Gao-hui2(1.School of Electromechanical Engineering,Northeast Forestry University,Harbin 150040,China;2.School of Materials Science and Engineering,Harbin Institute of Technology,Harbin 150080,China;3.Research Academy of Science and Industry Technology,Harbin Institute of Technology,Harbin 150080,China)

【机构】 东北林业大学机电学院； 哈尔滨工业大学材料学院； 哈尔滨工业大学科学与工业技术研究院；

【摘要】 碳纤维增强铝基复合材料(Cf/Al)具有高比强度、高比刚度和优异的物理性能,是优异的航空航天备选材料。本文以6061Al为基体,M40纤维为增强体,采用压力浸渗法制备了碳纤维增强铝基复合材料。结果表明,Cf/Al复合材料组织致密,纤维分布均匀;界面处仅有极少量界面反应物Al4C3的存在。弯曲强度为1400MPa以上。材料的纵向热膨胀系数为(0～2)×10-6℃-1,横向热膨胀系数为(17～20)×10-6℃-1,通过铺层等方法可对热膨胀系数设计。材料在14次-20～60℃冷热冲击后,纵向尺寸相对变化小于4×10-6,横向尺寸相对变化小于12×10-6,具有良好的尺寸稳定性。采用Cf/Al复合材料制备的空间遥感器镜筒结构完全满足使用要求,较之钛合金镜筒结构减重31.8%,说明Cf/Al复合材料是一种性能优异、应用价值高的新型光学结构材料。更多还原

【Abstract】 Carbon fibre reinforced aluminum matrix composites(Cf/Al)have been identified as potential candidate materials for application in optical structure.In this paper,M40 carbon fibres were used to reinforce 6061Al by pressure infiltration method.Cf/Al composite were well infiltrated with good fibre dispersion,and little reactants Al4C3 were observed at the C/Al interface.The bending strength of Cf/Al composite was over 1 400 MPa,while its coefficient of thermal expansion(CTE)in longitudinal and perpendicular direction were(0～2)×10-6/℃ and(17～20)×10-6/℃ respectively,and its thermal expansion properties could be optimized via ply design.Thermal cycling testing between 20 C and 150 C for 14 complete cycles revealed good dimensional stability of Cf/Al composite,while residual relative length change in longitudinal and perpendicular direction were less than 4×10-6 and 12×10-6,respectively.The drawtube of Cf/Al composite in space remote instrument fully met the application requirements,indicating that Cf/Al composite has wildly application in optical structure.更多还原