High-Velocity Air Plasma Spraying of (Ti, Cr)C–32 wt.% Ni Clad Powder
| Autor: | M. A. Vasil’kovskaya, Yu. S. Borisov, M. V. Kolomytsev, O.P. Masyuchok, A. L. Borisova, I. I. Timofeeva |
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| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Reproducibility Dense plasma focus Materials science Metallurgy Metals and Alloys 02 engineering and technology Plasma engineering.material 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Indentation hardness Anode Coating Mechanics of Materials 0103 physical sciences Materials Chemistry Ceramics and Composites engineering Composite material Nichrome 0210 nano-technology Porosity |
| Zdroj: | Powder Metallurgy and Metal Ceramics. 56:305-315 |
| ISSN: | 1573-9066 1068-1302 |
| DOI: | 10.1007/s11106-017-9898-0 |
| Popis: | The influence of air plasma spraying (parameters such as plasma gun power, spraying distance, plasma gas flow, anode diameter) of (Ti, Cr)C–32 wt.% Ni clad powder on the characteristics of resultant coatings (structure, microhardness, porosity, phase composition) is studied. The experimental procedure is designed using the mathematical planning method. The experimental data are processed to derive regression equations, determining the quantitative dependence of average microhardness and stability of microhardness characteristics on spraying process parameters. It is found that plasma gun power and plasma gas flow have the greatest impact on microhardness of the coatings and ΔX/HVav parameter, which characterizes the reproducibility of coating properties. The spraying distance has hardly any influence on the properties studied within the test range (160–220 mm). The hardness of coatings produced from the (Ti, Cr)C–32 wt.% Ni clad powder (12.15–14.58 GPa) is higher than that of the coatings obtained by air plasma spraying of a mechanical mixture of 75 wt.% (Ti, Cr)C + 25 wt.% NiCr (5.3–12.6 GPa). |
| Databáze: | OpenAIRE |
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