固态相变-热压烧结制备Ti_3Al/TiC+Al_2O_3陶瓷复合材料  

Prepare Ti_3Al/TiC+Al_2O_3 Ceramic Composite by Phase Change in Solid State-Sintering under Hot Press

作　　者：赵萍[1] 孙康宁[1] 李江田[1] 

机构地区：[1]山东大学材料液态结构及其遗传性教育部重点实验室,山东济南250061

出　　处：《材料热处理学报》2004年第1期12-14,共3页Transactions of Materials and Heat Treatment

摘　　要：采用机械球磨工艺使Ti粉和Al粉在高能碰撞下发生固态相变形成Ti Al非晶及固溶体 ,并利用X射线衍射对不同时间球磨结果进行了分析。球磨粉料与TiC和Al2 O3粉混合后在真空下热压烧结 ,促进Ti Al粉向Ti3Al金属间化合物的转变 ,最终形成了以Ti3Al为增韧相的陶瓷复合材料 ,断裂韧度值较单纯TiC陶瓷提高近一倍。Make Ti and Al powders change into Ti-Al non-crystals and solid solution by mechanical ball milling technique under high energy collisions, then X-ray method is used to analyze the milling results of different hours. The milled powder is mixed with TiC and Al 2O 3 powders and sintered in vacuum under hot press to induce Ti-Al powder turn into Ti 3Al intermetallic compound. As a result, Ti 3Al/TiC+Al 2O 3ceramic composite is got with Ti 3Al as a toughen phase, its fracture toughness is twice of the pure TiC ceramic.

关 键 词：固态相变 金属间化合物 断裂韧度 

分 类 号：TB332[一般工业技术—材料科学与工程]