热压对短碳纤维增强2024复合材料组织和性能影响  

Effects of VHPS Process on Microstructure and Properties of Short C_f/2024 Composites

作　　者：王飞舟 杨瑞宾 张云杰 谭欣荣 刘小方 刘忠侠 Wang Feizhou Yang Ruibin Zhang Yunjie Tan Xinrong Liu Xiaofang Liu Zhongxia(Key Laboratory of Materials Physics, Ministry of Education, School of Physical Engineering, Zhengzhou University Department of Equipment Management Engineering, Rocket Force University of Engineering)

机构地区：[1]郑州大学物理工程学院材料物理教育部重点实验室 [2]火箭军工程大学装备管理工程系

出　　处：《特种铸造及有色合金》2017年第9期1002-1006,共5页Special Casting & Nonferrous Alloys

摘　　要：采用真空热压烧结工艺制备了纤维长度为3mm、质量分数为3%的短碳纤维增强2024铝基复合材料。研究了热压工艺对复合材料密度、晶粒尺寸、界面结构和硬度的影响。结果表明,在450℃、50MPa下保温50min时,复合材料致密程度较高,纤维与α(Al)基体的界面结合良好,硬度达到最高。由于镀铜层提高了纤维与α(Al)基体的润湿性,镀铜短碳纤维比没有镀铜的短碳纤维对复合材料的性能提高更显著。3% short carbon fiber with a length of 3mm reinforced 2024 Al matrix composites were fabricated by vacuum hot press sintering（VHPS）.The effects of VHPS parameters on density,grain size,interface structure and hardness of the composites were investigated.The results reveal that the optimized VHPS processing parameters are sintered at 450 ℃ for 50 min and 50 MPa,where the specimens sintered exhibit compact structure with the desirable interface bonding between Cfandα-Al matrix,and the maximum hardness can be obtained.The improvement of mechanical properties by addition of 3% Cucoated Cfare more obvious than that of the non-coating Cfwith Cu coating on carbon fiber as a result of Cu-coating improving wettability of fiber withα-Al matrix.

关 键 词：短碳纤维增强铝基复合材料 真空热压烧结 界面 硬度 

分 类 号：TB333[一般工业技术—材料科学与工程]