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Effect of Oxygen Partial Pressure on the Cyclic Oxidation Behavior of Mo76Si14B10

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Abstract

Hot-pressed and arc-melted Mo76Si14B10 (at. pct) exhibits α-Mo solid solution, Mo3Si, and Mo5SiB2 in microstructures with varying morphologies. Cyclic oxidation tests performed at oxygen partial pressures of 0.21 and 1 atm show the mass loss of the hot-pressed alloy to be ≈1.5 and ≈4 times less, respectively, than that of the arc-melted alloy. The thickness of the protective silicate layer increases with an increase of both Moss grain size and oxygen partial pressure in the environment.

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The authors thank S. Mondal and P. Guha for technical assistance at the central research facility of IIT Kharagpur. Financial support provided by the Defence Research Development Organization, New Delhi, India, is gratefully acknowledged.

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Authors and Affiliations

  1. Department of Metallurgical and Materials Engineering, Indian Institute of Technology Kharagpur, Kharagpur, 721302, West Bengal, India

    Barna Roy (Research Scholar),  Khushboo (Graduate Student, Graduate Metallurgist), Jayanta Das (Assistant Professor), Rahul Mitra (Professor) & Sanat Kumar Roy (Professor)

  2. Rio Tinto Iron Ore, Perth, WA, Australia

    Khushboo (Graduate Student, Graduate Metallurgist)

Authors
  1. Barna Roy
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  2. Khushboo
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  3. Jayanta Das
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  4. Rahul Mitra
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  5. Sanat Kumar Roy
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Corresponding author

Correspondence to Jayanta Das.

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Manuscript submitted January 14, 2013.

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Roy, B., Khushboo, Das, J. et al. Effect of Oxygen Partial Pressure on the Cyclic Oxidation Behavior of Mo76Si14B10 . Metall Mater Trans A 44, 2910–2913 (2013). https://doi.org/10.1007/s11661-013-1756-1

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