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Mechanochemical Synthesis of Mo-Doped Nickel Aluminides

Mechanochemical Synthesis of Mo-Doped Nickel Aluminides The structure and thermal stability of Mo-doped Ni–Al intermetallic phases prepared by mechanical alloying were studied by x-ray diffraction and differential scanning calorimetry. The results demonstrate that mechanical processing of 50Ni + 45Al + 5Mo and 45Ni + 5Mo + 50Al powder mixtures yields nonstoichiometric aluminides and that a part of the Mo remains unreacted. The Mo introduced instead of Ni occupies some Ni sites in the structure of the forming aluminide, and this distribution persists during subsequent heating to 700°C. When Mo partially replaces Al, the Mo atoms also occupy some Ni sites, but subsequent heating to 700°C drives them to Al sites. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Inorganic Materials Springer Journals

Mechanochemical Synthesis of Mo-Doped Nickel Aluminides

Inorganic Materials , Volume 38 (9) – Sep 29, 2004

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References (14)

Publisher
Springer Journals
Copyright
Copyright © 2002 by MAIK “Nauka/Interperiodica”
Subject
Chemistry; Inorganic Chemistry; Industrial Chemistry/Chemical Engineering
ISSN
0020-1685
eISSN
1608-3172
DOI
10.1023/A:1020086023807
Publisher site
See Article on Publisher Site

Abstract

The structure and thermal stability of Mo-doped Ni–Al intermetallic phases prepared by mechanical alloying were studied by x-ray diffraction and differential scanning calorimetry. The results demonstrate that mechanical processing of 50Ni + 45Al + 5Mo and 45Ni + 5Mo + 50Al powder mixtures yields nonstoichiometric aluminides and that a part of the Mo remains unreacted. The Mo introduced instead of Ni occupies some Ni sites in the structure of the forming aluminide, and this distribution persists during subsequent heating to 700°C. When Mo partially replaces Al, the Mo atoms also occupy some Ni sites, but subsequent heating to 700°C drives them to Al sites.

Journal

Inorganic MaterialsSpringer Journals

Published: Sep 29, 2004

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