多孔TiB2＋Al2O3／NiAl基复合材料的研究  

Study on porous TiB_2+Al_2O_3/NiAl-based composite material

作　　者：崔洪芝[1,2] 王勇[1] 黑鸿君[2] 曹丽丽[2] 

机构地区：[1]中国石油大学华东机电工程学院,山东东营257061 [2]山东科技大学材料科学与工程学院,山东青岛266510

出　　处：《粉末冶金技术》2008年第5期350-353,共4页Powder Metallurgy Technology

基　　金：国家高新技术发展计划项目(2006AA06Z381)

摘　　要：采用自蔓延高温合成技术制备NiAl/Al2O3+TiB2多孔复合材料,Ni-Al体系的反应产物的相组成主要为NiAl;Ni、Al、B2O3和TiO2组成的反应体系在进行燃烧合成反应之后,生成物主要是NiAl、Al2O3和TiB2,表明燃烧过程中很短的时间内反应能完全充分地进行;加入10Al+3TiO2+3B2O3→5Al2O3+3TiB2颗粒增强体系后,反应合成的多孔产物的孔径减小,孔洞间的连通性增强,孔隙度升高。It＇s promising to replace existing Ni and Fe base superalloy by intermetallies NiAl applicable to higher temperature and worse environment due. to its advantages of high melting point, low density, high heat conductivity,good oxidation resistance and high temperature stability etc. However, its lower strength at high temperature and lower ductility at low temperature hinder its practical applications. Porous NiAl based composite material strengthened by ceramic particles can find applications in purification of auto-exhaust and waste water disposal etc. Using Ni, Al, B2O3 and TiO2, porous NiAt/Al2O3 ＋ TiB2 composite material was prepared by SHS. The porous products particle-reinforced by adding 10Al ＋ 3TiO2 ＋ 3 B2O3→5Al2O3 ＋ 3TiB2, have reduced pore size, heightened connectivity of pore and increased porosity.

关 键 词：自蔓延高温合成 NIAL金属间化合物 Al2O3+TiB2复相陶瓷 多孔复合材料 

分 类 号：TB333[一般工业技术—材料科学与工程] TB332