搅拌速率对FSP制备ZrO_2/2024表层复合材料的影响  

Research on ZrO_2/2024 Surface Composites Fabricated by Friction Stir Processing

作　　者：黎远哲[1] 王泓[1] 鄢君辉[1] 乙晓伟[1] 

机构地区：[1]西北工业大学材料学院,西安710072

出　　处：《机械科学与技术》2011年第2期262-264,269,共4页Mechanical Science and Technology for Aerospace Engineering

基　　金：陕西省自然基金项目(2003E119)资助

摘　　要：应用FSP(friction stir processing)制备ZrO2/2024表面复合材料,可以使得铝合金具有更好的耐磨性以及热障性能。在两种不同旋转速率参数条件下(搅拌头转速为1000 r/min和1600 r/min,横向移动速率为20 cm/min),制备的表面复合材料复合层厚度大约为200μm～700μm。对增强颗粒的分布、形貌和复合材料的显微硬度值进行的研究表明,ZrO2颗粒均匀地分布在铝合金基体内,与基体有良好的结合性;复合材料复合层的显微硬度值在1000 r/min以及1600 r/min条件下,较铝合金基体分别提高了83%和46%。Friction stir processing was applied to fabricate ZrO2/2024 surface composite with the expectation for better wear resistance and thermal barrier property.About 200 μm and 700 μm thick ZrO2/2024 surface composites were successfully fabricated at two rotation speeds（1000 r/min and 1600 r/min） with constant travel speed of 20cm/min.The microstructure,the distribution of the reinforcing particle and the microhardness of the obtained surface composites were evaluated.It is shown that the ZrO2 particles in the fabricated surface composites are well-distributed and have very good bonding with the matrix.Microhardness in surface composites fabricated at 1000 r/min and 1600 r/min increases by 83% and 46%,respectively,compared to aluminum alloy matrix.The thickness,the volume fraction of the reinforcing particle and the microhardness of the surface composite can be controlled by different rotation speed at a constant travel speed.

关 键 词：表面复合材料 FSP 铝合金 ZrO2颗粒 显微硬度 微观组织 

分 类 号：TG174.4[金属学及工艺—金属表面处理] TB34[金属学及工艺—金属学]