Synthesis and Characterization of Ti-Si3N4 Metal Matrix Composites Prepared by Press-and-sinter
Titanium matrix composites(TMCs)have received more attraction for aerospace and automobile applications due to their excellent performance(especially high specific strength,outstanding creep resistance and elevated temperature resistance),over titanium and titanium alloys.In this paper titanium based metal matrix composites with different weight fractions(2 wt.,5 wt.and 10 wt.%)of Si3N4 reinforcement were prepared by a simple press-and-sinter route.The resultant composites were characterized using X-ray diffraction(XRD)and scanning electron microscopy(SEM)analyses.The results demonstrate decomposition of Si3N4 when sintered at 1300 ℃,resulting in the formation of silicide phases within titanium matrix.A maximum value of hardness of 811 HV1 was achieved for the 5 wt.%Si3N4 reinforced Ti composite samples.Wear properties were studied using a Ducom tribometer.It is observed that the wear resistance increases with increasing reinforcement content in the titanium matrix.The high microhardness,arising from solid solution and uniform distribution of silicide phase,as well as good interfacial bonding between matrix and secondary phases are responsible for the observed wear behavior.
Titanium composite Microhardness Tribometer Wear Sintering X-ray diffraction
Singh Harshpreet Hayat Muhammad Dilawer Das Raj Cao Peng
Department of Chemical and Materials Engineering,University of Auckland,Private Bag 92019,Auckland 1 Sir Lawrence Wackett Aerospace Research Centre,School of Engineering,RMIT University,Melbourne,Victo
国际会议
北京
英文
1066-1070
2018-09-16（万方平台首次上网日期，不代表论文的发表时间）