增强相含量对SiCP/2024复合材料显微组织和力学性能的影响  

Effects of Enhanced Phase Content on Microstructure and Mechanical Properties of SiC_P/2024 Composites

作　　者：顾建 李冬青 刘胜春 郑树会 GU Jian;LI Dongqing;LIU Shengchun;ZHENG Shuhui(China Electric Power Research Institute,Beijing 102401,China)

机构地区：[1]中国电力科学研究院有限公司,北京102401

出　　处：《热加工工艺》2020年第16期93-96,101,共5页Hot Working Technology

基　　金：国家电网公司总部管理科技项目(基于新型陶瓷颗粒增强铝基复合材料的轻量化金具技术研究GC71-19-013)。

摘　　要：采用热等静压的方法制备了不同比例SiC颗粒增强相增强铝基复合材料,研究了SiC质量分数在15wt%~20wt%条件下,增强相含量对SiC_P/2024复合材料微观组织、拉伸性能及硬度的影响。结果表明:SiC颗粒在铝基体中呈骨架连续分布,经固溶热处理和自然时效后,晶粒尺寸增大,整体均匀化,界面结合状态良好,SiC_P/2024复合材料的拉伸强度有明显的提高;当SiC质量分数在15wt%~20wt%时,随着增强相含量的增加,SiC_P/2024复合材料抗拉强度和硬度变化不大,但会提高材料的屈服强度。相比未添加SiC颗粒的铝基体,SiC颗粒作为硬质相加入到铝基体后,在界面结合状态良好的状态下,对材料的力学性能具有良好的改善作用。The SiC particle reinforced aluminum matrix composites with different reinforcements proportion were made by hot isostatic pressure method. The effects of enhanced phase content on the microstructure, tensile properties and hardness of SiC_P/2024 composites under 15 wt%-20 wt% of the SiC mass fraction were studied. The results show that, the SiC particles are distributed continuously in aluminum matrix. After solid solution heat treatment and natural aging, the grain size increases,the whole is homogenized, and the interface bonding state is good, the tensile strength of SiC_P/2024 composites is obviously improved. When SiC mass fraction is 15 wt%-20 wt%, the tensile strength and hardness of the SiC_P/2024 composite do not change much, but the yield strength of the material increases. Compared with the aluminum material without adding SiC particles, SiC particles are added to the aluminum matrix as hard phase, which can improve the mechanical properties of the material in good interfacial bonding state.

关 键 词：SiCP/2024 复合材料 显微组织 拉伸性能 硬度 

分 类 号：TB333.12[一般工业技术—材料科学与工程]