烧结工艺对多孔钛微观结构及力学性能的影响  

Effect of Sintering Process on Microstructure and Mechanical Property of Porous Ti

作　　者：赵家豪 曲扬 罗洪杰 杨世杰[1] ZHAO Jia-hao;QU Yang;LUO Hong-jie;YANG Shi-jie(School of Metallurgy,Northeastern University,Shenyang 110819,China;Engineering Technology Research Center of Ministry of Education for Materials Advanced Preparation,Northeastern University,Shenyang 110819,China)

机构地区：[1]东北大学冶金学院,辽宁沈阳110819 [2]东北大学教育部材料先进制备技术工程研究中心,辽宁沈阳110819

出　　处：《东北大学学报（自然科学版）》2024年第6期816-822,共7页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(51874093).

摘　　要：烧结作为多孔钛成型过程中的关键步骤之一,通过控制烧结条件能够赋予多孔钛优异的力学性能.以镁粉和镁颗粒作为造孔剂,采用真空蒸馏烧结在不同烧结条件下制备了造孔剂添加量为60%的液固过滤用多孔钛,并对其微观结构、压缩性能和抗弯性能进行了表征和测试.研究表明:随烧结温度的升高和烧结时间的延长,多孔钛的孔径减小、孔隙率下降、孔隙球化;当烧结温度低于1 150℃时,多孔钛的轴向收缩始终大于径向收缩;屈服强度和弯曲强度在烧结温度为1 150℃、烧结时间为180 min时达到最大,分别为158.60和230.40 MPa.Sintering is a critical step in the formation process of porous Ti.Porous Ti can be endowed with excellent mechanical properties by controlling sintering conditions.Porous Ti for liquid‑solid filtration with a 60%space holder was manufactured using vacuum distillation sintering,which uses Mg powder and Mg particles as the space holder under different sintering conditions.The microstructure,compressive property and bending property were characterized and tested,providing a reference for the preparation and performance optimization of porous Ti.The results show that with increasing of sintering temperature and time,the pore size of porous Ti decreases,the porosity decreases,and the pore spheroidizes.When the sintering temperature is below 1150℃,the axial shrinkage of porous Ti is always greater than the radial shrinkage.The yield strength and bending strength reach the maximum values of 158.60 MPa and 230.40 MPa respectively at a sintering temperature of 1150℃and a sintering time of 180 min.

关 键 词：多孔钛 真空蒸馏 孔隙率 屈服强度 弯曲强度 

分 类 号：TG146.2[一般工业技术—材料科学与工程]