Indentation toughness of Mo_5Si_3-based alloys  

作　　者：E.Strom 张继 冯荻 

机构地区：[1]Chalmers University of Technology, SE-412 96 Gothenburg, Sweden [2]Central Iron and Steel Research Institute, Beijing 100081, China

出　　处：《中国有色金属学会会刊：英文版》2002年第4期676-680,共5页Transactions of Nonferrous Metals Society of China

基　　金：Project ( 5 98810 0 4)supportedbytheNationalNaturalScienceofChina

摘　　要：The indentation toughness of Mo 5Si 3 based phases was studied with regard to different alloying elements, amount of alloying addition as well as the presence of secondary phases. Cr, Ti, Nb, Ni and Co were added as alloying elements. The results show that the indentation fracture toughness of Mo 5Si 3 increases with the alloying additions, from 2.4?MPa·m 1/2 for monolithic to just over 3?MPa·m 1/2 for highly alloyed Mo 5Si 3. Small volume fractions of brittle secondary phases may have a positive impact on the indentation toughness; while larger fractions seems to lower the toughness.The indentation toughness of Mo_5Si_3-based phases was studied with regard todifferent alloying elements, amount of alloying addition as well as the presence of secondaryphases. Cr, Ti, Nb, Ni and Co were added as alloying elements. The results show that the indentationfracture toughness of Mo_5Si_3 increases with the alloying additions, from 2.4 MPa centre dotm^(1/2) for monolithic to just over 3 MPa centre dot m^(1/2) for highly alloyed Mo_5Si_3. Smallvolume fractions of brittle secondary phases may have a positive impact on the indentationtoughness; while larger fractions seems to lower the toughness.

关 键 词：Mo5Si3基合金 压痕韧性 自润滑材料 

分 类 号：TG146.412[一般工业技术—材料科学与工程] TH117[金属学及工艺—金属材料]