Influence of spark plasma sintering on microstructure and corrosion behaviour of Ti-6Al-4V alloy reinforced with micron-sized Si3N4 powder

摘要：

　　Ti-6Al-4V-Si3N4 composites were effectively fabricated by spark plasma sintering (SPS) technique.The addition of Si3N4 on Ti-6Al-4V was varied from 5% to 15% (wt fraction).The effect of Si3N4 addition on the densification, microstructure, and microhardness and corrosion behaviour of Ti-6Al-4V was investigated.An increase in microhardness value was recorded from 325.46 HV0.1 to 585.73 HV 0.1.X-ray diffraction (XRD) analysis showed that the intensity of diffraction peaks of Si3N4 phase in the composites increased.The sintered Ti-6Al-4V reinforced with Si3N4 compacts revealed the non existence of intermediate phases, such as TiSi2 (titanium silicide) which was expected.SEM analysis of the spark plasma sintered composites revealed α and β phase microstructures in Ti-6Al-4V with uniform distribution of Si3N4 particulates in the matrix.The corrosion resistance property of the material was improved by the addition of Si3N4 from 0,986629 mm/year to 0,030547 mm/year.

关键词： Spark plasma sintering Si3N4 Ti-6Al-4V Microsturcture Corrosion

作者: F.M.Kgoete A.P.I.Popoola O.S.I.Fayomi

作者单位: Department of Chemical, Metallurgical & Materials Engineering, Tshwane University of Technology, P.M.B X680, Pretoria, 0001, South Africa

会议类型: 国际会议

会议名称: 2018 International Conference on Defence Technology (2018国际防务技术会议)

会议地点: 北京

会议语种:英文

页码: 465-468

在线出版日期: 2018-10-21（万方平台首次上网日期，不代表论文的发表时间）