摘要
采用放电等离子技术(SPS),利用Ti-Al-Ti_3AlC_2体系的原位反应制备Ti_2AlC/TiAl基复合材料。借助XRD、SEM和OM分析其组成及显微结构。结果表明,1100℃烧结后,Ti_3AlC_2全部转化为Ti_2AlC。产物由TiAl、Ti3Al和Ti_2AlC相组成。Ti_2AlC呈颗粒状分布于基体晶界处,部分钉扎于晶内。当Ti_3AlC_2掺杂量为10%时,综合力学性能最佳,维氏硬度、断裂韧性和抗弯强度分别达到了4.9 GPa、7.41 MPa·m1/2和699.9 MPa,较TiAl合金有较大提升。
The Ti2AlC/TiAl composites were in-situ prepared by spark plasma sintering technology（SPS） in Ti-Al-Ti3AlC2system.The phase transformation and the microstructure of the Ti2AlC/TiAl composites were characterized by XRD,SEM and OM,respectively.The results indicate that Ti3AlC2decompose into Ti2Al C after sintered at 1100 ℃.The composites consist of TiAl,Ti3 Al and Ti2Al C phases.Ti2Al C particles mainly distribute in the grain boundaries,part of which pinning in the intracrystalline.The mechanical properties of the composite with 10% Ti3AlC2exhibit the highest performances,and the Vickers hardness,fracture toughness and flexural strength reach to4.9 GPa,7.41 MPa·m^1/2 and 699.9 MPa,respectively,which are higher than that of the TiAl alloy.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2016年第8期20-24,共5页
Transactions of Materials and Heat Treatment
基金
国家自然科学基金青年科学基金(51201094)
陕西省青年科技新星科技计划(2014KJXX-75)
陕西省自然科学基础研究计划重点项目(2016JZ016)
陕西省教育厅自然科学重点科学研究计划(16JS018)
陕西省教育厅专项(15JK1157)
