TiC增强钨基复合材料微观结构及力学性能  

Microstructures and Mechanical Properties of TiC Reinforced W Matrix Composite

作　　者：种法力[1] 

机构地区：[1]徐州工程学院数理学院

出　　处：《特种铸造及有色合金》2014年第6期574-577,共4页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(11205130);江苏省"青蓝工程"资助项目

摘　　要：利用高能球磨和热压烧结方法制备TiC/W基复合材料,通过微观形貌、相对密度、显微硬度、杨氏模量和抗弯强度等表征方法分析了TiC弥散增强钨基复合材料的效果。结果发现,TiC弥散相有效地抑制了W晶粒的长大,断裂模式转为穿晶断裂,有效增强了W基合金材料的性能,特别是纳米TiC质量分数为1%时,增强效果较显著。与纳米TiC相比,微米TiC增强效果不明显。TiC dispersedly strengthened tungsten matrix composites were fabricated with the help of the high energy milling and vacuum hot pressing.The microstructure and mechanical properties such as relative density,micro-hardness,Young′s modulus and bending strength of the composites were investigated.The results show that a small addition of TiC can change the fracture mode from intergranular type to transgranular type as a result of inhibiting effectively the growth of W particle,improving the mechanical properties of TiC/W,especially for 1% n-TiC/W composite.Compared with the n-TiC,the effects of μ-TiC on the mechanical properties can be neglected.

关 键 词：W TIC 力学性能 

分 类 号：TB333[一般工业技术—材料科学与工程]