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.
出处
《机械科学与技术》
CSCD
北大核心
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
关键词
表面复合材料
FSP
铝合金
ZrO2颗粒
显微硬度
微观组织
surface composite
friction stir processing
aluminum alloy
ZrO2 particle
microhardness
microstructure
