发动机用石墨烯增强TC11合金放电等离子烧结制备参数优化及力学性能研究  

Preparation parameter optimization and mechanical properties of the graphene-reinforced TC11 titanium alloys prepared by spark plasma sintering used for engine

作　　者：吴小俊 WU Xiao-jun(Chongqing Automotive Power System Test Engineering Technology Research Center,Chongqing 401120,China;College of Vehicle Engineering,Chongqing Polytechnic Institute,Chongqing 401120,China)

机构地区：[1]重庆市汽车动力系统测试工程技术研究中心,重庆401120 [2]重庆工业职业技术学院车辆工程学院,重庆401120

出　　处：《粉末冶金技术》2022年第4期291-295,共5页Powder Metallurgy Technology

摘　　要：通过添加石墨烯提高了放电等离子烧结(spark plasma sintering,SPS)制备发动机用耐高温TC11合金的力学性能,研究了不同烧结参数下TC11合金的密度,并观察了合金显微组织,分析了合金力学性能的影响因素。研究结果表明:随着烧结温度增加,试样密度先增加后平稳;提高烧结压力后,试样密度发生了略微上升。随着烧结温度的上升,更多α相转变成了高温β相,形成了相对稳定的β相比例。随着烧结时间的增加,合金室温压缩强度表现为升高的趋势。提高烧结压力后,TC11合金获得了更高的室温与高温力学强度。通过实验最终确定烧结时间5 min、温度900℃与压力50 MPa时制备的TC11合金具有最优力学性能。The mechanical properties of the high temperature resistant TC11 alloys prepared by spark plasma sintering(SPS)used for engine were improved by adding grapheme,the density of TC11 alloy under the different sintering parameters was studied,the microstructure was observed,and the influencing factors of mechanical properties were analyzed.The results show that,with the increase of sintering temperature,the density of the sample increases first and then becomes stable.With the increase of the sintering pressure,the density of the sample increases slightly.With the increase of sintering temperature,moreαphase is transformed into the high temperatureβphase,forming a relatively stable ratio ofβphase.With the increase of sintering time,the compressive strength at room temperature shows an upward trend.With the increase of sintering pressure,the TC11 alloys show the higher mechanical strength at room and high temperature.The sintering parameters for the TC11 alloys with the optimal mechanical properties are finally determined as the sintering time of 5 min,the sintering temperature of 900℃,and the sintering pressure of 50 MPa.

关 键 词：TC11合金 放电等离子烧结 密度 微观组织 力学性能 

分 类 号：TF124[冶金工程—粉末冶金]