粉末冶金(SiCp+B_(4)C)/6061Al复合材料组织与性能研究  

Research on microstructures and properties of(SiCp+B_(4)C)/6061Al composite by powder metallurgy

作　　者：付玉 王宇 徐永东[1] 施虹霞[1] 王荫洋 朱秀荣[1] 王军[1] FU Yu;WANG Yu;XU Yongdong;SHI Hongxia;WANG Yinyang;ZHU Xiurong;WANG Jun(Ningbo Branch of Chinese Academy of Ordnance Science,Ningbo 315103,China)

机构地区：[1]中国兵器科学研究院宁波分院,浙江宁波315103

出　　处：《兵器材料科学与工程》2024年第5期78-83,共6页Ordnance Material Science and Engineering

基　　金：冲击环境材料技术重点实验室基金(6142902220104)。

摘　　要：采用热等静压工艺制备了体积分数为40%的(SiCp+B4C)/6061Al复合材料,研究固溶时效处理对40%(SiCp+B_(4)C)/6061Al复合材料显微组织、热导率、线膨胀系数、力学性能和微屈服强度的影响。结果表明:热等静压法制备的铝基复合材料组织致密;热等静压态复合材料的平均线膨胀系数为13.1×10^(-6) K^(-1),热导率为165.3 W/(m·K);固溶时效态复合材料的平均线膨胀系数为13×10^(-6) K^(-1),热导率为146.4 W/(m·K);与热等静压态相比,固溶时效态复合材料的抗拉强度提高了88%,为477 MPa,抗弯强度为644 MPa,微屈服强度为236 MPa,具有较高的力学性能和尺寸稳定性。本文采用的材料设计方法与热等静压成形技术,为高品质高体积分数颗粒增强铝基复合材料低成本制造提供基础。40%(SiCp+B_(4)C)/6061Al composites were prepared by hot isostatic pressing.The effects of solution aging treatment on the microstructure,thermal conductivity,linear expansion coefficient,mechanical properties and micro-yield strength of 40%(SiCp+B_(4)C)/6061Al composites were investigated.The results show that the microstructure of aluminum matrix composites prepared by hot isostatic pressing is dense.The average linear expansion coefficient and thermal conductivity of the composites are 13.1×10^(-6) K^(-1) and 165.3 W/(m·K)respectively.The average linear expansion coefficient and thermal conductivity are 13×10^(-6) K^(-1) and 146.4 W/(m·K)respectively.Compared with the hot isostatic pressing state,the tensile strength of the solid solution aging composite is increased by 88%,and the bending strength is 477 MPa,the bending strength is 644 MPa,and the micro-yield strength is 236 MPa,which has higher mechanical properties and dimensional stability.The material design method and hot isostatic forming technology used in this paper provide the basis for low-cost manufacturing of high quality and high volume fraction particle reinforced aluminum matrix composites.

关 键 词：铝基复合材料 粉末冶金 线膨胀系数 显微组织 力学性能 

分 类 号：TG146.2[一般工业技术—材料科学与工程]