摘要
原料摩尔配比为n(TiC)∶n(Ti)∶n(Si)∶n(Al) =2∶1∶1∶0 .2的起始混合粉料在 130 0～ 14 0 0℃和 30MPa压力下热压 2h制得高纯致密Ti3 SiC2 块体材料 .添加适量铝作助剂显著加快Ti3 SiC2 的反应合成 ,并使Ti3 SiC2 在 12 0 0℃下大量生成 ,能谱仪分析表明Al在材料中均匀分布 .所得Ti3 SiC2 颗粒为板状结晶形貌 ,平面内尺寸大小为 3～ 8μm .
Bulk Ti 3SiC 2 material with high purity and density was fabricated by the mixed powders with the composition of n (TiC)∶ n (Ti)∶ n (Si)∶ n (Al)=2∶1∶1∶0.2 in molar ratio, at the temperature of 1?300～ 1?400?℃ and the pressure of 30MPa for 2?h hot pressing. By studying X ray diffraction and scanning electron micrograph, it was showed that the appropriate addition of aluminum in the starting mixture accelerated the reaction synthesis of Ti 3SiC 2, causing the formation of Ti 3SiC 2 in great quantities at the temperature of 1?200?℃ . The EDS results show the uniform distribution of aluminum in the material. Ti 3SiC 2 obtained takes the shape of plane with the size 3～8?μm in elongated dimension.
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2005年第3期10-12,共3页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
国家自然科学基金资助项目 (5 0 172 0 37) .
关键词
碳化钛硅
热压
高纯致密
铝
titanium silicon carbide
hot pressing
high purity and density
aluminum
