摘要
利用搅拌摩擦加工法制备了碳纳米管增强AZ80镁基复合材料,对所制备的该复合材料热膨胀性能进行了研究。结果显示,MWCNTs/AZ80复合材料的热膨胀系数比退火态AZ80镁合金试样及搅拌摩擦加工后的AZ80试样有所减小,这说明MWCNTs的加入可有效减小基体材料的热膨胀系数。随MWCNTs体积分数增加,该复合材料的线膨胀系数呈减小的趋势。后续热处理对MWCNTs/AZ80复合材料的热膨胀系数也有影响,退火和固溶时效处理均可降低该复合材料的热膨胀系数。
AZ80 based composite reinforced with multi-walled nanotubes was prepared by friction stir processing. The thermal expansion characteristic of MWCNTs/AZ80 composite was investigated. The results show that the composite has smaller thermal expansion coefficients compared with annealed AZ80 matrix materials and the FSPed AZ80 samples, which indicates that the addition of MWCNTs can effectively decrease the thermal expansion coefficient of the matrix. The thermal expansion coefficients of MWCNTs/AZ80 composite decrease along with the increase of volume fraction of MWCNTs. The heat treatment has a positive effect on the thermal expansion coefficients of the composite, and the annealing or solution ＋ aging treatments can decrease the thermal expansion coefficients of the composite.
出处
《热加工工艺》
CSCD
北大核心
2013年第18期1-6,共6页
Hot Working Technology
基金
国家自然科学基金资助项目(51201087
51165038
51364037)
江西省自然科学基金项目(20132BAB216013)
西北工业大学凝固技术国家重点实验室开放基金项目(SKLSP201306
SKLSP201225)
江西省教育厅科学技术研究基金项目(GJJ13493)
南昌航空大学科研启动金项目(EA201203072)
关键词
搅拌摩擦加工
碳纳米管
复合材料
热膨胀
friction stir processing
carbon nanotubes
composite
thermal expansion
