摘要
采用搅拌摩擦加工法制备了不同体积分数碳纳米管增强AZ80镁基复合材料,考察了固溶+时效热处理对复合材料的微观组织和力学性能的影响。结果表明:镁基复合材料组织致密,晶粒细小,其中的碳纳米管均匀分布;热处理导致碳纳米管与AZ80基体界面上有A13Ni2化合物生成,改善了界面结构;复合材料的抗拉强度随碳纳米管体积分数的增加逐渐增加,固溶+时效处理后的复合材料的抗拉强度有所提高,影响MWCNTs/AZ80复合材料力学性能的主要因素是碳纳米管与镁基体之间的界面结合情况。
AZ80 magnesium based composites strengthened by multi-walled carbon nanotubes （MWCNTs） of different volume fractions were fabricated by friction stir processing （FSP） and the effect of heat treatment on microstructure and mechanical property of MWCNTs/AZ80 were investigated. The results show that the Mg-based composites are dense with fine grains, in which MWCNTs distribute uniformly. A13Ni2 intermetallic compounds are formed on the interface between the MWCNTs and the magnesium matrix, leading to a sound bonding condition. The tensile strength of the composites increases with the increase of volume fraction of the MWCNTs, and it is also improved by the post heat treatment of solid solution and aging. The major factor affecting the mechanical property of the MWCNTs/AZ80 is the interface structure between the MWCNTs and the magnesium matrix.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2015年第4期989-994,共6页
Rare Metal Materials and Engineering
基金
国家自然科学基金(51201087,51265043,51364037)
江西省自然科学基金(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)
江西省教育厅科学技术研究项目(GJJ13493)
轻合金加工科学与技术国防重点学科实验室开放基金资助项目(GF201301003)
关键词
搅拌摩擦加工
碳纳米管
复合材料
热处理
friction stir processing
carbon nanotubes
composite
heat treatment
