Properties of the intermetallic phase Nb3Al prepared by a calcium hydride reduction process

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• 作者：A. V. Kasimtsev (1)
  S. N. Yudin (2)
  A. I. Logacheva (3)
  T. A. Sviridova (4)
  
• 刊名：Inorganic Materials
• 出版年：2015
• 出版时间：January 2015
• 年：2015
• 卷：51
• 期：1
• 页码：43-50
• 全文大小：907 KB
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• 作者单位：A. V. Kasimtsev (1)
  S. N. Yudin (2)
  A. I. Logacheva (3)
  T. A. Sviridova (4)
  
  1. OOO Metsintez, ul. Frunze 9, Tula, 300041, Russia
  2. Tula State University, pr. Lenina 92, Tula, 300012, Russia
  3. OAO Kompozit, Pionerskaya ul. 4, Korolev, Moscow oblast, 142092, Russia
  4. Moscow Institute of Steel and Alloys, National University of Science and Technology, Leninskii pr. 4, Moscow, 119049, Russia
  
• ISSN：1608-3172

文摘

This paper demonstrates the feasibility of and examines the main steps in preparing the Nb3Al compound by a metallothermic process: by heating a mixture of niobium and aluminum oxides and calcium hydride (calcium hydride reduction process). Our calculations indicate that, when thermodynamic equilibrium sets in during the reaction between the components of a starting mixture, the oxygen content of the intermetallic phase may be very low. We obtained experimental Nb3Al intermetallic powders of nearly 100% purity and investigated their physicochemical and technological properties.