摘要
采用超重力场燃烧合成工艺,进行TiB_2基陶瓷-钛合金的熔化连接以及钛合金-中间陶瓷-42CrMo合金钢的加压瞬间液相扩散连接,成功制备出陶瓷—金属—陶瓷—金属梯度复合仿生材料,在陶瓷—钛合金界面上原位生成多相(TiB_2、TiB与TiFe)尺寸与体积分数均呈连续变化的梯度复合结构,且在钛合金—中间陶瓷—42Cr Mo界面也原位生成Ti Fe相尺寸与体积分数均呈连续变化的梯度复合结构,继而通过微观形成仿生结构,就在宏观上使材料硬度具有硬—软—硬—软连续变化的分布特征。
By achieving fusion bonding of TiB_2-based ceramic and Ti-6Al-4V alloy as well as pressure-assisted transient liquid phase diffusion bonding of Ti alloy, intermediate ceramic and 42 Cr Mo steel, the biological graded composite with heterogeneous intercalation(i.e. ceramic-metal-ceramic-metal) was prepared by combustion synthesis in high-gravity field. The graded microstructure in which TiB_2, Ti B and Ti Fe continuously changed in size and volume fraction developed in the interface from the ceramic to Ti alloy, while the graded microstructure in which fine Ti Fe particles gradually changed was also formed in the inter-regions between Ti alloy, TiB_2-based ceramic and 42 Cr Mo steel. Therefore, so hard-by-soft distribution in hardness of the composite was finally built up due to the achievement of the biological microstructure with heterogeneous intercalation.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2015年第S1期816-820,共5页
Rare Metal Materials and Engineering
基金
国家自然科学基金(51072229)
武器装备预研基金项目(9140A12040213JB34001)
关键词
超重力场燃烧合成
异质插层
梯度复合
组织演化
仿生结构
combustion synthesis in high-gravity field
heterogeneous intercalation
graded composite
microstructure evolution
biological microstructure
