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鈦鎳多孔材料的制備及其顯微組織與形狀記憶性能
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國家自然科學(xué)基金(50371072)；湖南省自然科學(xué)基金(05JJ30110)


Preparation of Porous NiTi Alloy and Its Microstructure and Shape Memory Properties
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    摘要:

    采用粉末燒結(jié)法制備了高孔隙率的Ti-50.8 at%Ni形狀記憶合金(SMA)，并對(duì)其顯微組織和形狀記憶性能進(jìn)行了研究。結(jié)果表明，用該種方法制備的多孔合金樣品具有孔隙分布均勻以及開孔率高的特點(diǎn)，其平均孔徑在200 μm左右。合金組織主要由奧氏體NiTi相(B2)和單斜馬氏體NiTi相(B19’)組成。循環(huán)加載-卸載實(shí)驗(yàn)結(jié)果表明，該多孔材料能表現(xiàn)出一定的形狀記憶效應(yīng)，而且形狀記憶效應(yīng)隨孔隙率的增加而降低

    Abstract:

    Porous Ti-50.8 at%Ni shape memory alloys (SMA) with high porosity were prepared by the powder metallurgical technique, and the microstructure and shape memory behavior of the porous alloys were investigated. The results indicate that the porous alloys prepared by this method exhibit a homogenous pore-space structure with a high open-cell ratio, and the average pore size is about 200 mm. The microstructure is mainly composed of Austenitic NiTi phase (B2) and monoclinic Martensite NiTi (B19’). The cyclic load-unload recovery curves reveal that the porous alloy can exhibit certain shape-memory effect, which decreases with the increase of the porosity

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廖 政,林建國,馬 驀.鈦鎳多孔材料的制備及其顯微組織與形狀記憶性能[J].稀有金屬材料與工程,2010,39(4):642~646.[Liao Zheng, Lin Jianguo, Ma Mo. Preparation of Porous NiTi Alloy and Its Microstructure and Shape Memory Properties[J]. Rare Metal Materials and Engineering,2010,39(4):642~646.]
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  • 收稿日期:2009-04-27
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