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TiAl金屬間化合物納米粉末的相轉(zhuǎn)變
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中法“蔡元培”國(guó)際交流合作項(xiàng)目;西南科技大學(xué)極端條件物質(zhì)特性實(shí)驗(yàn)室開放基金(11zxjk07)


Phase Transformation of TiAl Intermetallic Compound Nanoparticles
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    摘要:

    對(duì)采用自懸浮定向流技術(shù)制備的TiAl金屬間化合物納米粉末進(jìn)行真空退火,考察退火工藝參數(shù)對(duì)其相轉(zhuǎn)變過程的影響。X射線衍射等分析表明:隨著退火溫度的升高以及退火時(shí)間的延長(zhǎng),純a2-Ti3Al相納米粉末向g-TiAl相轉(zhuǎn)化的程度逐漸增加,其晶粒尺寸也逐漸變大。將其納米粉末真空壓制成塊體也有助于上述相轉(zhuǎn)變。對(duì)復(fù)相的納米塊體進(jìn)行真空退火,可以得到純g-TiAl相的納米晶合金。

    Abstract:

    Experiments of vacuum annealing were carried out for nanoparticles of TiAl intermetallic compound prepared by the flow-levitation method. And the effect of annealing parameters on the phase transformation of TiAl alloy was investigated by X-ray diffraction analysis. The results show that more g-TiAl phase is transformed from a2-Ti3Al phase with the increasing of annealing temperature and time. And the grain size of two phases increases accordingly. This phase transformation is promoted after nanoparticles are compressed into a bulk by vacuum-pressing. The nanocrystalline alloy with pure g-TiAl phase is obtained after the bulk compressed from mixed phase nanoparticles is vacuum-annealed.

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羅江山,易 勇,李喜波,舒遠(yuǎn)杰,唐永建. TiAl金屬間化合物納米粉末的相轉(zhuǎn)變[J].稀有金屬材料與工程,2015,44(5):1281~1284.[Luo Jiangshan, Yi Yong, Li Xibo, Shu Yuanjie, Tang Yongjian. Phase Transformation of TiAl Intermetallic Compound Nanoparticles[J]. Rare Metal Materials and Engineering,2015,44(5):1281~1284.]
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  • 收稿日期:2014-05-12
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  • 在線發(fā)布日期: 2015-06-08
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