Synthesis of a Composite Alloy Based on Ore Concentrate and Oxide Compounds

Abstract:

The conditions for the synthesis of Al-Cr-W alloys during the aluminothermic reduction of a mineral tungsten concentrate - scheelite were considered. The alloys were identified as an aluminum matrix by the methods of elemental and X-ray phase analyzes. It is shown that the alloy synthesized from scheelite concentrate contains small amounts of iron and oxygen impurities (1.2 wt. %). It has been established that the alloys have a composite structure: inclusions of continuously solid solutions based on chromium and tungsten, as well as chromium aluminides Al₃(Cr, W, Fe)2, which have increased microhardness values (12.9 GPa) are distributed in the aluminum matrix.

• Periodical: Materials Science Forum (Volume 1037)
• Pages: 218-223
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.1037.218
• Online since: July 2021
• Authors: E.D. Kim*, Ernst H. Ri, Michail A. Ermakov, Hosen Ri, Andrey S. Zhivetyev
• Keywords: Aluminothermic Synthesis, Chromium, Composite Alloys, Intermetallic Compound, Microstructure, Tungsten

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