Abstract
For Mo-Cr nitride layer prepared by NH3 gas nitriding of pure Mo subjected to Cr-diffusion treatment, the oxidation behavior in air and corrosion behavior in boiling sulfuric acid were investigated. The surface nitride layer consisted of γ-Mo2N type solid solution of which Mo-Cr ratio was almost 1:1 on the surface. Although γ-Mo2N layer obtained by nitriding pure Mo was oxidized at temperatures above 773 K, Mo-Cr nitride layer exhibited superior oxidation resistance up to 1073 K. The corrosion resistance of Mo-Cr nitride layer in boiling sulfuric acid was as excellent as that of γ-Mo2N layer.
| Original language | English |
|---|---|
| Pages (from-to) | 529-533 |
| Number of pages | 5 |
| Journal | Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy |
| Volume | 56 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - Aug 2009 |
| Externally published | Yes |
Keywords
- Ammonia gas nitriding
- Chromium diffusion
- Corrosion resistance
- Molybdenum-chromium nitride
- Oxidation resistance
ASJC Scopus subject areas
- Mechanical Engineering
- Industrial and Manufacturing Engineering
- Metals and Alloys
- Materials Chemistry
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