摘要
向Ti3Si C2材料中引入Al、Al-Si合金粉,研究Al组元对Ti_3Si C_2材料致密度、力学性能、相组成及显微结构的影响。结果表明:引入适量的Al、Al-Si合金粉,能够促进Ti3Si C2材料的生成,可以得到纯度更高的Ti3Si C2材料,且引入Al-Si的效果较为明显;会生成Ti_3Si(1-x)AlxC_2,随着Al、Al-Si合金粉含量的增加,生成较多的Ti_3Si(1-x)AlxC_2,从而降低Ti3Si(Al)C_2材料的体积密度能生成固溶相,起到固溶强化的作用,可得到性能良好Ti3Si C材料,有助于提高Ti_3Si C材料的力学性能,当引入量为0.3Al-Si合金粉时,抗弯强度为352 MPa,断裂韧性为5.68 MPa·m1/2。
The Al and Al-Si alloy powder was introuduced to fabricate Ti3SiC2materials by reactive hot pressing sintering method.The effect of different Al contents on the volume density,phase constituent,mechanical properties and microstructure of Ti3SiC2materials was investigated. The results show that the Ti3SiC2with higher purity can be obtained by the appropriate introduction of Al and Al-Si alloy powder,which can promote the formation of Ti3SiC2,and the effect of Al-Si is more obvious. Ti3Si（1-x）AlxC2can be generated when Al and Al-Si alloy powder is introduced. More Ti3Si（1- x）AlxC2is generated with the increase of Al and Al-Si alloy powder content,which reduces the volume density of Ti3SiC2material. Solid solution phase is formed by appropriate introduction of Al and Al-Si alloy powder content,which has the effect of solidification-strenthening and improves the mechanical properties of composite materials,so Ti3SiC2materials with good properties can be prepared. When the addition amount of 0.3AlSi alloy powder,the bending strength is 352 MPa and the fracture toughness is 5.68 MPa·m^1/2.
出处
《兵器材料科学与工程》
CAS
CSCD
北大核心
2016年第2期17-20,共4页
Ordnance Material Science and Engineering
基金
国家自然科学基金青年基金项目(51302206)
