采用DSC和SEM等研究了采用不封装热等静压法(CF-HIP)在不同烧结时间下制备的多孔NiTi形状记忆合金时效时的马氏体相变行为。结果表明: 经1 050 ℃烧结1 h后, 合金中主要含有Ti2Ni相和大块的Ni3Ti相, 随着烧结时间的延长, 大块Ni3Ti相逐渐消失, Ti2Ni相几乎没有变化; 将烧结试样经450 ℃时效后, 随着时效时间的延长, Ni4Ti3相在母相中逐渐析出长大, 短时烧结试样的马氏体相变过程分为三步(B2→R, R→B19′ 和B2→B19′), 而长时烧结试样的则为两步(B2→R和R→B19′)。
所属栏目
国家自然科学基金资助项目(50701019)
收稿日期
2009/12/182010/7/15
作者单位
袁斌:华南理工大学材料科学与工程学院, 广州 510640
赖铭:华南理工大学材料科学与工程学院, 广州 510640
梁锦霞:华南理工大学材料科学与工程学院, 广州 510640
曾美琴:华南理工大学材料科学与工程学院, 广州 510640
高岩:华南理工大学材料科学与工程学院, 广州 510640
备注
袁斌(1977-), 男, 江西泰和人, 副教授, 博士。
引用该论文:
YUAN Bin,LAI Ming,LIANG Jin-xia,ZENG Mei-qin,GAO Yan.Effect of Sintering Time on Martensitic Transformation during Ageing of Porous NiTi Shape Memory Alloys[J].Materials for mechancial engineering,2011,35(1):6～10
袁斌,赖铭,梁锦霞,曾美琴,高岩.烧结时间对多孔NiTi形状记忆合金时效时马氏体相变的影响[J].机械工程材料,2011,35(1):6～10
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