| 等离子体烧结制备TiNi合金的表征 |
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| 引用本文： | 马维刚,起华荣,冯中学,王效琪,史庆南,陈亮维,杨刚.等离子体烧结制备TiNi合金的表征[J].稀有金属材料与工程,2016,45(7):1793-1797. |
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| 作者姓名： | 马维刚 起华荣 冯中学 王效琪 史庆南 陈亮维 杨刚 |
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| 作者单位： | 昆明理工大学,昆明理工大学,昆明理工大学,昆明理工大学,昆明理工大学,昆明理工大学,昆明冶金研究院 |
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| 摘 要： | 将高能球磨制备的原子比为1:1的Ti Ni合金粉进行等离子体真空烧结。利用XRD、EDS和SEM对合金粉和烧结样进行了成分与微观形貌的表征,同时对烧结样进行了硬度测试。结果表明:球磨22 h后Ti Ni粉呈非晶态粉末,球磨30 h后的TiNi合金粉发生了明显的固相反应,生成了TiNi、Ni_3Ti、Ti_3Ni_4等物相。等离子体烧结样的物相是Ti Ni,Ni_4Ti_3、Ni_3Ti和Ti_2Ni。平均晶粒尺寸约2μm,平均硬度(HV)达到9000 MPa,自然时效1年后的平均硬度达到6800MPa,是常规电弧熔炼法制备的Ti Ni合金的2~5倍。
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| 关 键 词： | 机械合金化 Ti-Ni合金 等离子体烧结 |
| 收稿时间： | 2014/6/20 0:00:00 |
| 修稿时间： | 2014/12/29 0:00:00 |
Characterization of TiNi alloy prepared by spark plasma sintering |
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| maweigang,Qihuarong,FengZhongxue,Wang xiao qi,Sh iQing nan,Chen Liang wei and Yang Gang.Characterization of TiNi alloy prepared by spark plasma sintering[J].Rare Metal Materials and Engineering,2016,45(7):1793-1797. |
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| Authors: | maweigang Qihuarong FengZhongxue Wang xiao qi Sh iQing nan Chen Liang wei and Yang Gang |
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| Affiliation: | Kunming University of Science and Technology,Kunming University of Science and Technology,Kunming University of Science and Technology,Kunming University of Science and Technology,Kunming University of Science and Technology,Kunming University of Science and Technology,Kunming Metallurgical Research Institute |
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| Abstract: | Atomic ratio of 1:1 TiNi alloy powder was prepared by high energy ball milling process, then sintered by plasma in vacuum. The TiNi alloy powder and TiNi sintered sample were used to characterize the composition and microstructure by XRD, EDS and SEM, the hardness of the sintered sample was tested. The experimental results show that the TiNi powder was amorphous form after 22h high energy ball milling, the solid state reactions obviously take place and the new phases,such as TiNi, ,Ti3Ni4 ,appear after 30h high energy ball milling. phases of the sintered sample phase are TiNi, Ni4Ti3,Ni3Ti and Ti2Ni, its microstructure is mainly composed of fine grain with size of less 2 micron, its average Vickers hardness is up to 900Hv, after one year natural aging, its average Vickers hardness is down to 680Hv. The hardness of TiNi alloy prepared by plasma sintering is 2 ~ 5 times of that prepared by arc melting method. |
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| Keywords: | Mechanical Alloying(MA ) Ti-Ni alloy Spark plasma sintering(sps) |
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