首页|镁造孔多孔NiTi合金的微波烧结制备与表征

镁造孔多孔NiTi合金的微波烧结制备与表征

Preparation and characterization of porous NiTi alloys synthesized by microwave sintering using Mg space holder

扫码查看
原文链接
  • NETL
  • NSTL
  • 万方数据
  • 维普
为了获得轻质、高强和高阻尼的多孔NiTi合金,采用微波烧结协同镁造孔技术制备多孔NiTi合金.考察多孔NiTi合金的显微组织、力学性能、相变行为、超弹性和阻尼性能.结果表明:当烧结温度低于或等于900℃时,多孔NiTi合金主要由B2 NiTi相和少量B19'NiTi相组成.随着烧结温度的升高,多孔NiTi合金的孔隙率逐渐降低,而压缩强度先增加后下降,在900℃时获得最大值.随着造孔剂Mg的含量从1％增加到7％(质量分数),多孔NiTi合金的孔隙率从37.8％ 增加到47.1％,而压缩强度从2058 MPa降低至1146 MPa.与碳酸氢铵造孔多孔NiTi合金相比,镁造孔多孔NiTi合金的相变行为发生变化,而压缩强度、超弹性、形状记忆效应和阻尼性能均获得极大的提高.
To obtain the lightweight, high strength, and high damping capacity porous NiTi alloys, the microwave sintering coupled with the Mg space holder technique was employed to prepare the porous NiTi alloys. The microstructure, mechanical properties, phase transformation behavior, superelasticity, and damping capacity of the porous NiTi alloys were investigated. The results show that the porous NiTi alloys are mainly composed of the B2 NiTi phase with a few B19' NiTi phase as the sintering temperature is lower than or equal to 900 ℃. With increasing the sintering temperature, the porosities of the porous NiTi alloys gradually decrease and the compressive strength increases first, reaching the maximum value at 900 ℃, and then decreases. With increasing the Mg content from 1 wt.％ to 7 wt.％, the porosities of the porous NiTi alloys increase from 37.8％ to 47.1％, while the compressive strength decreases from 2058 to 1146 MPa. Compared with the NH4HCO3 space holder, the phase transformation behavior of the porous NiTi alloys prepared with Mg space holder changes, and all of the compressive strength, superelasticity, shape memory effect and damping capacity are greatly improved.

porous NiTi alloymicrowave sinteringMg space holdersuperelasticitydamping capacity

赖涛、徐吉林、肖奇飞、佟运祥、黄俊、张剑平、罗军明、刘勇

展开 >

南昌航空大学材料科学与工程学院,南昌 330063

哈尔滨工程大学生物医学材料与工程研究中心,哈尔滨 150001

南昌大学江西省轻质高强结构材料重点实验室,南昌 330031

多孔NiTi合金 微波烧结 Mg造孔 超弹性 阻尼性能

financial supports from the National Natural Science Foundation of Chinafinancial supports from the National Natural Science Foundation of Chinafinancial supports from the National Natural Science Foundation of ChinaAeronautical Science Foundation of ChinaAeronautical Science Foundation of ChinaOpening Project of National Engineering Research Center for Powder Metallurgy of Titanium & Rare Metals, ChinaKey Laboratory of Lightweight and High Strength Structural Materials of Jiangxi Province, ChinaJiangxi Provincial Natural Science Foundation, China

5110108551764041517041672015ZF560272016ZF56020201900420171BCD4000320202ACBL214011

2021

10.1016/S1003-6326(21)65511-5

中国有色金属学报(英文版)
中国有色金属学会

中国有色金属学报(英文版)

CSTPCDCSCDSCI
影响因子：1.183
ISSN：1003-6326
年,卷(期)：2021.31(2)
  • 4
  • 6