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Preparation of TiAl/Al_2O_3 composites by combustion synthesis
作者姓名:李志强  韩杰才  赫晓东  张幸红
作者单位:Center for Composite Materials,Harbin Institute of Technology,Harbin 150001,China
基金项目:SponsoredbytheScientificResearchFoundationofHarbinInstituteofTechnology(GrantNo .HIT2 0 0 0 41)
摘    要:0 INTRODUCTIONTitaniumaluminidesbasedonTiAlhaveexcel lentpotentialtotaketheplaceofconventionaltitani umandnickelalloysinadvancedspacecraftduetotheirlowdensity ,goodelevated temperaturestrengthandhighresistancetooxidation1~ 3] .However ,thewaytopracticalapp…


Preparation of TiAl/Al2O3 composites by combustion synthesis
LI Zhi-qiang,HAN Jie-cai,HE Xiao-dong,ZHANG Xing-hong.Preparation of TiAl/Al_2O_3 composites by combustion synthesis[J].Journal of Harbin Institute of Technology,2002,9(2).
Authors:LI Zhi-qiang  HAN Jie-cai  HE Xiao-dong  ZHANG Xing-hong
Abstract:Studies the combustion synthesis of Al Ti TiO 2 system and concludes that, due to its low exothermic nature, a stable combustion wave can be maintained only when the system is ignited at a certain preheating temperature, and coupled with appropriate pseudo HIP process, dense TiAl/Al 2O 3 composites with density as high as 97% of the theoretical value can be produced, and points out. Microstructure observation shows in situ formed Al 2O 3 particles are of an average size smaller than one micron, and the hardness of TiAl matrix is enhanced by introduction of these particles.
Keywords:combustion synthesis  TiAl/Al  2O  3  composites
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