Gradient Laser ZrB2–MoSi2 Coating on Graphite
| Autor: | A. M. Bloshchanevich, D. V. Yurechko, O. N. Grigor'ev, M. A. Vasil’kovskaya, Irina A. Podchernyaeva |
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| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Pulsed laser Materials science Metals and Alloys Liquid phase 02 engineering and technology Substrate (electronics) engineering.material 021001 nanoscience & nanotechnology Condensed Matter Physics Laser 01 natural sciences law.invention Coating Mechanics of Materials Intensive Phase law 0103 physical sciences Materials Chemistry Ceramics and Composites Graphite substrate engineering Graphite Composite material 0210 nano-technology |
| Zdroj: | Powder Metallurgy and Metal Ceramics. 54:679-685 |
| ISSN: | 1573-9066 1068-1302 |
| DOI: | 10.1007/s11106-016-9762-7 |
| Popis: | A high-temperature ZrB2–MoSi2 coating on graphite is produced by pulsed laser melting (in air) of a graphite sample with powder layers pre-deposited on the working surface. It is demonstrated that laser melting is accompanied by an intensive phase formation in the layers and at the interface. The main phases of the surface are: ZrB2, MoSi2, Mo5Si3, and ZrC. It is demonstrated that the coating forms with the liquid phase reinforced with ~1 μm thick fibers. It is characterized by a gradient change in the composition towards the substrate: the content of ZrC increases and the content of ZrB2 decreases towards the graphite substrate. Such a change in the composition leads to higher adhesive strength of the coating. |
| Databáze: | OpenAIRE |
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