TiAl金属间化合物微滤膜的制备与性能  

Preparation and properties of microporous TiAl intermetallic compound filter membrane

作　　者：高麟[1] 贺跃辉[1] 江垚[1] 黄伯云[1] Liu C T 

机构地区：[1]中南大学粉末冶金国家重点实验室,长沙410083

出　　处：《粉末冶金材料科学与工程》2005年第4期216-219,共4页Materials Science and Engineering of Powder Metallurgy

基　　金：国家自然科学基金资助项目(20476106)

摘　　要：微滤膜广泛应用于环保、生物、医药、化工和冶金等领域,而现有微滤膜通常存在亟待解决的强度低、对服役环境的要求较高以及异质材料之间的界面匹配和相容性差等问题。为此,采用Ti、Al元素粉末为原料,通过复合成形和反应合成工艺,制备了TiAl金属间化合物微滤膜。检测表明:该微滤膜的孔隙分布非常均匀,孔径细小,最大孔径仅3.2μm,平均孔径为1.2μm;650℃下的氧化速率常数k=0.005g·m-2·h-1,仅为不锈钢多孔材料的3.42%,经过13.5h×10次的循环氧化后,单位面积的质量增值仅为不锈钢多孔材料的3.2%。Microporous filter (MF) membranes have extensive applications in many fields such as environmental protection, biological materials, medicine, chemical industry, metallurgy and so on. However, low strength, weak environment resistance properties, and bad consistency with support materials limit the application of the present MF membranes. Thereupon microporous TiAl intermetallic compound filter membrane with even aperture distribution was reactively synthesized with Ti, Al elemental powders. The measured results show that its maximum aperture and mean aperture are 3.2μm and 1.2μm, respectively; oxidation rate constant at 650℃ is 0.005g·m -2·h -1, which is only 3.42% of that of porous stainless steel; and after cycle oxidation of 13.5h per time for 10 times, the gaining in mass per unit area is only 3.2% of that of porous stainless steel.

关 键 词：TIAL合金 微滤膜 循环氧化 

分 类 号：TF125.24[冶金工程—粉末冶金]