Al_(2)O_(3)(p)增强Al基复合材料的制备及力学性能  

Preparation and Mechanical Properties of Al_(2)O_(3)(P)Reinforced Al Matrix Composites

作　　者：李晓微 吴和保[2] LI Xiao-wei;WU He-bao(Engineering College,Xianning Vocational and Technical College,Xianning 437000,Hubei,China;Wuhan Institute of Technology,Wuhan 430000,Hubei,China)

机构地区：[1]咸宁职业技术学院工学院,湖北咸宁437000 [2]武汉工程大学机电工程学院,湖北武汉430000

出　　处：《铸造》2023年第4期409-414,共6页Foundry

基　　金：湖北省教育厅科学研究计划指导性项目(B2021512)。

摘　　要：通过超声振动辅助制备Al_(2)O_(3)(p)增强2024复合材料,研究了制备工艺和Al_(2)O_(3)(p)对复合材料微观组织和力学性能的影响。结果显示,施加超声振动和加入Al_(2)O_(3)(p)可明显细化复合材料的微观组织。随着Al_(2)O_(3)(p)含量的增大,复合材料α-Al相尺寸先减小后增大,显微硬度、抗拉强度、屈服强度和伸长率均先增大后减小,当Al_(2)O_(3)(p)含量为1.5%时,均达到极大值,过量的Al_(2)O_(3)(p)加入会导致Al_(2)O_(3)(p)的团聚。复合材料显微硬度和力学性能的提高是超声振动和Al_(2)O_(3)(p)引起的细晶强化、颗粒强化和晶界强化的协同作用。Al_(2)O_(3)(p)reinforced 2024 composites were prepared assisted with ultrasonic vibration and the effects of preparation process and Al_(2)O_(3)(p)on the microstructure and mechanical properties of the composites were studied.The results showed that the ultrasonic vibration and the addition of the Al_(2)O_(3)(p)obviously refined the microstructure of the composites.With the increase of the Al_(2)O_(3)(p)content,the size ofα-Al phase decreased first and then increased,and the microhardness,tensile strength,yield strength and elongation increased first and then decreased.When the content of the Al_(2)O_(3)(p)was 1.5%,they all reached the maximum.The addition of the excessive Al_(2)O_(3)(p)led to the agglomeration of the Al_(2)O_(3)(p).The improvement of the microhardness and mechanical properties of the composites was the synergistic effect of fine grain strengthening,particle strengthening and grain boundary strengthening induced by the ultrasonic vibration and Al_(2)O_(3)(p).

关 键 词：Al_(2)O_(3)(p) 复合材料 微观组织 显微硬度 力学性能 

分 类 号：TB331[一般工业技术—材料科学与工程]