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首页> 外文会议>Euro PM2008 congress amp; exhibition proceedings >Formation of Intermediary Phases During Reactive Sintering Productionof Ti-Al and Ti-Al-Si Alloys
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Formation of Intermediary Phases During Reactive Sintering Productionof Ti-Al and Ti-Al-Si Alloys

机译：Ti-Al和Ti-Al-Si合金反应烧结生产过程中中间相的形成

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摘要

Bulk intermediary phases of Ti-Al and Ti-Al-Si systems are promising materials for highrntemperature applications. However, their production by melt metallurgy is problematic due tornhigh melting points of the intermediary phases and high reactivity of the melt. The reactivernsintering powder metallurgy is a simple alternative to conventional melting processes. Duringrnthis process, a pressed powder mixture of pure metals or other precursors is transformed intornbulk intermediary phases by thermally activated in-situ reaction. During reactive sintering of Ti-rnAl-Si alloys, molten Al-Si alloy fills pores and reacts with titanium producing a mixture of titaniumrnsilicides and aluminides. In this work, kinetics and mechanism of the formation of intermediaryrnphases in Ti-Al and Ti-Al-Si systems were described. Titanium was exposed to moltenrnaluminium or Al-Si alloys with silicon content of 30 and 50 wt.%. Results were successfullyrnapplied to the preparation of low-porosity Ti-Al-Si alloys.
机译：Ti-Al和Ti-Al-Si系统的本体中间相是有希望的高温应用材料。然而，由于中间相的高熔点和熔体的高反应性，它们通过熔体冶金法生产是有问题的。反应烧结粉末冶金是常规熔化工艺的一种简单替代方法。在此过程中，纯金属或其他前体的压制粉末混合物通过热活化原位反应转变为本体中间相。在Ti-rnAl-Si合金的反应烧结过程中，熔融的Al-Si合金填充孔并与钛反应，生成钛硅化钛和铝化物的混合物。在这项工作中，描述了在Ti-Al和Ti-Al-Si系统中形成中间相的动力学和机理。钛暴露于硅含量为30和50 wt。％的熔融铝或Al-Si合金中。结果成功地应用于低孔隙度Ti-Al-Si合金的制备。

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  • 来源
  • 会议地点 Mannheim(DE);Mannheim(DE)
  • 作者

    P. Novák; J. ?erák; D. Vojtěch; J. Kubásek; A. Michalcová;

  • 作者单位

    Department of Metals and Corrosion Engineering, Institute of Chemical Technology, PraguernTechnicka 5, 166 28 Prague 6, Czech Republic, e-mail: panovak@vscht.cz;

    rnDepartment of Metals and Corrosion Engineering, Institute of Chemical Technology, PraguernTechnicka 5, 166 28 Prague 6, Czech Republic;

    Department of Metals and Corrosion Engineering, Institute of Chemical Technology, PraguernTechnicka 5, 166 28 Prague 6, Czech Republic;

    Department of Metals and Corrosion Engineering, Institute of Chemical Technology, PraguernTechnicka 5, 166 28 Prague 6, Czech Republic;

    Department of Metals and Corrosion Engineering, Institute of Chemical Technology, PraguernTechnicka 5, 166 28 Prague 6, Czech Republic;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 粉末冶金（金属陶瓷工艺）;
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