钛铝锡碳固溶体粉体的合成研究  

Fabrication of the Ti_3Al_(1.2-x)SnxC_(1.8) Solid Solutions Powder

作　　者：艾明星[1] 翟洪祥[1] 梁胜国[1] 黄振莺[1] 

机构地区：[1]北京交通大学材料工程中心,北京100044

出　　处：《稀有金属材料与工程》2007年第A01期150-152,共3页Rare Metal Materials and Engineering

基　　金：国家自然科学基金项目(50472045);国家863计划项目(2003AA332080);北京交通大学博士生科技创新基金项目(48014)

摘　　要：以单质粉为原料,用无压烧结法制备了一系列高纯Ti3Al1.2-xSnxC1.8(x=0～0.8)固溶体粉体材料。利用XRD、SEM着重研究了x=0.2时,高纯Ti3Al1.2Sn0.2C1.8固溶体粉体的形成条件、显微形貌。结果表明:在1350～1500℃温度范围内,保温5min,都可获得高纯Ti3AlSn0.2C1.8粉体材料;SEM观察结果显示,烧结温度对Ti3AlSn0.2C1.8的显微形貌有很大影响,随着温度的升高,粉体晶粒逐渐向板状晶转变;在此基础上,通过优化工艺条件可获得单一相的连续Ti3Al1.2-xSnxC1.8固溶体粉体材料。High purity Ti3Al1.2-xSnxC1.8（x=0-0.8） solid solutions powders were fabricated using elemental powder mixture as the raw materials by the pressureless sintering. The formative condition and the microstructure of Ti3AlSn0.2C1.8 were investigated via X-ray diffraction （XRD）, scanning electron microscope （SEM） in details. The high purity Ti3AlSn0.2C1.8 powders can be fabricated by a pressureless calcining process from titanium, aluminum, tin and graphite powders at the temperatures from 1350 ℃ to 1500 ℃ for 5 min. The SEM analysis indicated that the calcining temperatures have obvious influence on the microstructure. With the increase of the temperature, the grain morphology is changed to plate-like grain. On the basise of the investigation, a series of high purity Ti3Al1.2-xSnxC1.8 （x=0-0.8） powder were synthesized under the optimized technical condition.

关 键 词：钛铝锡碳 固溶体 无压合成 颗粒形貌 

分 类 号：TQ174.1[化学工程—陶瓷工业]