Synthesis of Mo(Si, Al)2 powder by carbothermal reduction method

Tomokazu Takeda; Masato Uehara; Naoya Enomoto; Junichi Hojo

doi:10.14853/pcersj.2002F.0.172.0

15th Fall Meeting of The Ceramic Society of Japan

DOI https://doi.org/10.14853/pcersj.2002F.0.172.0

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Host: The Ceramic Society of Japan

Synthesis of Mo(Si, Al)₂ powder by carbothermal reduction method

Tomokazu Takeda, Masato Uehara, Naoya Enomoto, Junichi Hojo

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Keywords: molybdenum disilicide, lattice constant, carbothermal reduction method, solid solution, intermetallic compound, chemical composition

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Pages 172

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Abstract

Mo(Si, Al)₂ alloy has been reported it have an excellent mechanical and oxidation properties. Mo(Si, Al)₂ powder was fabricated by carbothermal reduction method. Silica was mixed with (NH₄)₆Mo₇O₂4 aqueous solution and dried in vacuum. The powder was mixed with Al₂O₃ and carbon and heated at 1500°C in Ar + H₂. X-ray powder diffraction analysis showed MoSi₂ and Al₂O₃. For lattice constants of synthesis powder, c-axis changed by addition of Al₂O₃, indicating the substitution of Si with Al in MoSi₂.

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