MoSi₂ Oxidation-Resistance Lifetime of Functionally Graded Materials Coatings for γ-TiAl
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- Ohshima Masayuki
- Intelligent Structures and Mechanics Systems Engineering, Graduate School of Advanced Science and Technology, Tokushima University
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- Matsuda Shohei
- Intelligent Structures and Mechanics Systems Engineering, Graduate School of Advanced Science and Technology, Tokushima University
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- Tetsui Toshimitsu
- High-Temperature Materials Center, National Institute for Materials Science
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- Hasezaki Kazuhiro
- Department of Mechanical Science, Graduate School of Science and Technology, Tokushima University
書誌事項
- タイトル別名
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- MoSi<sub>2 </sub>Oxidation-Resistance Lifetime of Functionally Graded Materials Coatings for γ-TiAl
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説明
<p>A functionally graded material (FGMs) MoSi2/Mo was adopted for oxidation resistance coating of γ-TiAl. The MoSi2 coating was produced by dipping Mo plates in the molten salt. The obtained MoSi2 coating layer resulted was approximately 60 μm in thickness. The oxidation resistance of MoSi2/Mo was examined at 1323-1423 K for 3-400 h in still air, as a criterion for the lifetime of MoSi2/Mo/γ-TiAl FGMs. The oxidation at 1423 K for 30 h in still air caused Si to diffuse into Mo without cracks or voids at MoSi2/Mo interlayer. The MoSi2 activation energy of volume diffusion was estimated as 523 ± 75 kJ/mol, which was consistent with the available data. The lifetime of the MoSi2 coating was approximately five times larger than that of a NbSi2 coating under the same condition. An oxidation-resistant MoSi2/Mo FGMs coating has a longer lifetime than an NbSi2/Nb coating for γ-TiAl.</p><p></p>
収録刊行物
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- 傾斜機能材料論文集
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傾斜機能材料論文集 31 (0), 1-5, 2017
傾斜機能材料研究会