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等離子體燒結(jié)制備TiNi合金的表征
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昆明理工大學(xué),昆明理工大學(xué),昆明理工大學(xué),昆明理工大學(xué),昆明理工大學(xué),昆明理工大學(xué),昆明冶金研究院

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中圖分類號(hào):

TG174.4

基金項(xiàng)目:

國家教育部博士點(diǎn)基金


Characterization of TiNi alloy prepared by spark plasma sintering
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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

Fund Project:

Natural Science Foundation of Yunnan Province (2009ZC027M); Innovation Fund of Science and Technology for Students (2012YA027)

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    摘要:

    將高能球磨制備的原子比為1:1的TiNi合金粉進(jìn)行等離子體真空燒結(jié)。利用XRD,EDX和SEM對(duì)合金粉和燒結(jié)樣進(jìn)行了成分與微觀形貌的表征，同時(shí)對(duì)燒結(jié)樣進(jìn)行了硬度測試。實(shí)驗(yàn)結(jié)果表明：球磨22h后TiNi粉呈非晶態(tài)粉末，球磨30h后的TiNi合金粉發(fā)生了明顯的固相反應(yīng)，生成了TiNi, Ni3Ti ,Ti3Ni4等物相。等離子體燒結(jié)樣的物相是TiNi、Ni4Ti3、Ni3Ti和Ti2Ni，微觀結(jié)構(gòu)主要是由2微米以下細(xì)晶粒組成，平均維氏硬度達(dá)到900Hv，自然時(shí)效1年后的平均維氏硬度達(dá)到680Hv，是常規(guī)電弧熔煉法制備的TiNi合金的2～5倍。

    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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馬維剛,起華榮,馮中學(xué),王效琪,史慶南,陳亮維,楊剛.等離子體燒結(jié)制備TiNi合金的表征[J].稀有金屬材料與工程,2016,45(7):1793~1797.[maweigang, Qihuarong, FengZhongxue, Wang xiao qi, Sh iQing nan, Chen Liang wei, 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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  • 收稿日期:2014-06-20
  • 最后修改日期:2014-12-29
  • 錄用日期:2015-01-13
  • 在線發(fā)布日期: 2016-10-09
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