Oxidation behavior of molybdenum alloy coatings at 1200 ℃
Three different coatings A, B and C were prepared on TZC molybdenum alloy surface by coating method. The A coating contains borosilicate glass, the B coating dopes MoSi2 powder with A mass fraction of 15% on the basis of the A coating, and the C coating adds a small amount of Al powder on the basis...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Editorial Office of Powder Metallurgy Technology
2025-02-01
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| Series: | Fenmo yejin jishu |
| Subjects: | |
| Online Access: | https://pmt.ustb.edu.cn/article/doi/10.19591/j.cnki.cn11-1974/tf.2023060008 |
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| Summary: | Three different coatings A, B and C were prepared on TZC molybdenum alloy surface by coating method. The A coating contains borosilicate glass, the B coating dopes MoSi2 powder with A mass fraction of 15% on the basis of the A coating, and the C coating adds a small amount of Al powder on the basis of the B coating. The oxidation behavior of the coatings at 1200 ℃ was studied by heating furnace, X-ray diffraction analyzer and scanning electron microscope. The results show that the C coating has a good protection performance within 1 h of high temperature oxidation, and the oxidation resistance of the C coating after 2 hours is 69% higher than that without coating protection. After high temperature oxidation, the cross-section morphology of A coating and B coating is dominated by the loose structure of MoO3 and TiO2 alternately distributed. The addition of aluminum powder changes the phase composition of the oxide film, and the C coating forms a three-layer structure of the outer aluminosilicate, the middle cerium titanium oxide, the inner TiO2 and molybdenum silicon compound, which makes it have excellent oxidation resistance. |
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| ISSN: | 1001-3784 |