徐吉林,陶寿晨,金晓飞,罗军明,刘勇.颗粒尺寸对微波烧结多孔NiTi合金的显微结构及力学性能的影响[J].稀有金属材料与工程,2020,49(2):454~460.[Xu Jilin,Tao Shouchen,Jin Xiaofei,Luo Junming,Liu Yong.Effect of particle size on the microstructure and mechanical properties of the porous NiTi alloys prepared by microwave sintering[J].Rare Metal Materials and Engineering,2020,49(2):454~460.]
颗粒尺寸对微波烧结多孔NiTi合金的显微结构及力学性能的影响
投稿时间:2018-09-26  修订日期:2018-11-02
中文关键词:  多孔NiTi合金  微波烧结  颗粒尺寸  力学性能  显微结构
基金项目:国家基金,航空基金,江西省轻质高强结构材料重点实验室开放基金
中文摘要:
      以不同颗粒尺寸Ni/Ti粉末为原料,采用微波烧结技术制备了多孔NiTi合金,并系统考察了颗粒尺寸对多孔NiTi合金的显微结构和力学性能的影响。结果表明随着颗粒尺寸的减小,多孔NiTi合金中的Ti2Ni和Ni3Ti第二相减少而单质Ni相消失。同时,多孔NiTi合金的孔隙形貌由带尖角的不规则形状向近圆形形状转变。此外,多孔NiTi合金的孔隙率和孔径随着颗粒尺寸的增大而增大,而洛氏硬度、抗压强度和抗弯强度均下降。因此,减小颗粒尺寸是非常有利于获得理想的显微结构(纯净的物相和均匀的孔隙结构)和高力学性能的微波烧结多孔NiTi合金。
Effect of particle size on the microstructure and mechanical properties of the porous NiTi alloys prepared by microwave sintering
英文关键词:Porous NiTi alloy  Microwave sintering  Particle size  Mechanical property  Microstructure
英文摘要:
      The porous NiTi alloys were prepared by microwave sintering with different Ni/Ti powder particle sizes, and the effect of particle size on the microstructure and mechanical properties of the porous NiTi alloys was systematically investigated. The results show that the undesired Ti2Ni and Ni3Ti phases in the porous NiTi alloys decrease and the Ni phase disappears with decreasing the particle sizes. At the same time, the pore shapes of the porous NiTi alloys change from the irregular shape with sharp angles to the suborbicular shape. Moreover, both of the porosities and pore sizes of the porous NiTi alloys increase with increasing the particle sizes, while all of the Rockwell hardness, compressive strength and bending strength decrease. Therefore, the decrease of particle sizes can be beneficial to obtain the microwave sintered porous NiTi alloys with desired microstructure (pure phase composition and uniform pore structure) and high mechanical properties.
作者单位E-mail
徐吉林 南昌航空大学材料科学与工程学院 jlxu@nchu.edu.cn 
陶寿晨 南昌航空大学材料科学与工程学院  
金晓飞 南昌航空大学材料科学与工程学院  
罗军明 南昌航空大学材料科学与工程学院  
刘勇 南昌大学江西省轻质高强结构材料重点实验室  
摘要点击次数: 42
全文下载次数: 41
查看全文  查看/发表评论  
关闭