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摻雜Nb2O5對自生Al2O3強(qiáng)化TiAl復(fù)合材料結(jié)構(gòu)的影響
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TG146.4

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國家自然科學(xué)基金資助項目（50432010,0372037）;陜西科技大學(xué)創(chuàng)新基金（SUST-B14）


Effect of Doping Nb2O5 on Microstructure of Autogeny Al2O3 Reinforced of TiAI Composite
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    摘要:

    采用原位反應(yīng)熱壓法制備了自生Al2O3增強(qiáng)TiAl間金屬化合物復(fù)合材料，通過第三元素（氧化鈮）摻雜的形式，對其進(jìn)行強(qiáng)化研究。采用DTA結(jié)合XRD分析對其反應(yīng)過程進(jìn)行了探討。SEM，XRD及其它測試分析顯示，引入氧化鈮使鋁熱反應(yīng)生成了更高的熱能，材料能夠在較低的溫度下燒結(jié)。同時，Nb2O5的摻入對基體相生成比例（TiAl：Ti3Al）有一定的調(diào)控作用，也使材料中的自生氧化鋁成分增強(qiáng)，對材料結(jié)構(gòu)及性能產(chǎn)生了較大影響。

    Abstract:

    Spontaneous Al2O3 reinforced TiAl composite was prepared by reaction synthesis with hot pressing. The effect of doping Nb2O5 on microstructure was investigated as well. Adopting DTA, XRD analysis, their reaction courses were analysed and discussed. SEM, XRD, metallography analysis and other test showed that it is niobium oxide improved aluminium thermal reaction and released much higher energy which made the composite could be sintered under lower temperature. Meanwhile, the doping of Nb2O5 has a function to control and alter the proportion of the matrix (TiAl: Ti3Al)phase, strengthen the forming of spontaneous alumina composition in the material, and produce greater influence on the microstructure.

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王芬 安世武 范志康 朱建鋒.摻雜Nb2O5對自生Al2O3強(qiáng)化TiAl復(fù)合材料結(jié)構(gòu)的影響[J].稀有金屬材料與工程,2006,35(11):1744~1747.[Wang Fen, An Shiwu, Fan Zhikang, Zhu Jianfeng. Effect of Doping Nb2O5 on Microstructure of Autogeny Al2O3 Reinforced of TiAI Composite[J]. Rare Metal Materials and Engineering,2006,35(11):1744~1747.]
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  • 收稿日期:2005-11-14
  • 最后修改日期:2005-11-14
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