SPS烧结Ti-Ta合金的组织、力学及电化学腐蚀性能研究  

Research on Microstructure,Mechanical and Electrochemical Corrosion Properties of Ti-Ta Alloys Prepared by SPS

作　　者：张文博 王彦龙 韩子轩 马昕宇 Zhang Wenbo;Wang Yanlong;Han Zixuan;Ma Xinyu(School of Materials Science&Engineering,Xi’an Polytechnic University,Xi’an 710048,China)

机构地区：[1]西安工程大学材料工程学院,陕西西安710048

出　　处：《钛工业进展》2025年第1期1-7,共7页Titanium Industry Progress

基　　金：陕西省大学生创新创业训练计划项目(S202310709073);西安市纺织复合材料重点实验室科技指导性项目(xafzfc-zd02)。

摘　　要：以Ti、Ta粉末为原材料,采用放电等离子烧结(SPS)技术,在不同烧结温度下制备了Ti-20Ta、Ti-26Ta和Ti-32Ta合金,利用SEM、EDS及XRD对合金进行表征,并分析其抗压缩性能及电化学腐蚀性能。结果表明,SPS烧结的Ti-Ta合金具有较高的致密度,随着烧结温度和Ta含量的增加,其组织中β-Ti含量增多,针状马氏体α′-Ti减少,合金的硬度及强度升高,而弹性模量呈现下降趋势。较高烧结温度和较多Ta含量时,Ti-Ta合金的自腐蚀电流密度下降,自腐蚀电位升高,电荷转移电阻增加,合金的耐腐蚀性能提高。1250℃烧结温度下,Ti-32Ta合金中α-Ti的质量分数为45.08%,硬度、屈服强度和弹性模量分别为2.83 GPa、868.26 MPa和83.03 GPa。Ti-20Ta,Ti-26Ta and Ti-32Ta alloys were prepared by spark plasma sintering(SPS)technology using Ti and Ta powders as raw materials at different sintering temperatures,SEM,EDS and XRD were applied to characterize the alloys and their compression resistance and electrochemical corrosion properties were analyzed.The results show that the Ti-Ta alloys sintered by SPS has high densities,and with the increase of sintering temperature and Ta content,the content ofβ-Ti in the microstructure increased,the acicular martensiteα′-Ti decreased,and the hardness and strength of the alloys are improved,while the modulus of elasticity show a decreasing trend.With the higher sintering temperature and more Ta content,the self-corrosion current density of Ti-Ta alloy decreases,self-corrosion potential increases,charge transfer resistance is enhanced,and the corrosion resistance of the alloy is improved.Theα-Ti mass fraction of Ti-32Ta alloy at the sintering temperature of 1250℃is 45.08%,the hardness,yield strength and elasticity modulus are 2.83 GPa,868.26 MPa and 83.03 GPa,respectively.

关 键 词：Ti-Ta合金 放电等离子烧结 微观结构 力学性能 电化学腐蚀 

分 类 号：TF124[冶金工程—粉末冶金] TG146.23[冶金工程—冶金物理化学]