摘要
以钛粉,硅粉和石墨粉为原料,采用放电等离子烧结技术制备密度为4.14 g/cm3的Ti3SiC2和密度为4.03 g/cm3的0.8 Ti3SiC2+0.2 SiC复合材料,并以此为基础制备Ti/Ti3SiC2/0.8Ti3SiC2+0.2SiC层状材料。通过扫描电镜(SEM)和X射线衍射仪(XRD)分析材料的显微结构与相组成。结果表明:该层状材料的界面结合紧密,没有明显的孔洞、裂纹等缺陷,各层的相组成符合设计要求。经800℃热处理40 h后Ti/Ti3SiC2界面处生成稳定的TiC层,在高温下该层状材料的界面基本稳定。
Ti3SiC2 with a density of 4.14 g/cm^3 and composite of 0.8Ti3SiC2＋0.2SiC with a density of 4.03 g/cm^3 were prepared using Ti,Si,and graphite powders as raw materials.On this basis,layered composite of Ti/Ti3SiC2/0.8Ti3SiC2＋ 0.2SiC was prepared by spark plasma sintering.Microstructure and phase composition of the layered composite were analysed by scanning electron microscope and X-ray,respectively.Results show that interfaces of the layered composite are tight and clean,no obvious pore and crack can be observed,and the phase composition in each layer is in accorded with the design requirement.After annealed at 800 ℃ for 40 h,a stable TiC layer was formed between the Ti/Ti3SiC2 interface.The prepared layered composite has good high temperature stability.
出处
《粉末冶金材料科学与工程》
EI
2010年第5期469-473,共5页
Materials Science and Engineering of Powder Metallurgy
基金
国家自然科学基金资助项目(5070560)
广东省自然科学基金资助项目(8151064101000029)
国家重点基础研究计划(973计划)专项课题(2007CB616905)
