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6367 |
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Wednesday, June 10, 2020, Hall K2 11:10 AM Suspension Spraying I |
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Development of ceramic coatings by using suspension plasma spraying (SPS) process with a cascaded torch |
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Geoffrey Darut* / UTBM, France Elodie Labreuche / UBFC, ICB-PMDM-LERMPS , FRANCE Christian Adam/ UBFC, ICB-PMDM-LERMPS , FRANCE Marie-Pierre Planche/ UBFC, ICB-PMDM-LERMPS , FRANCE Hanlin Liao/ UBFC, ICB-PMDM-LERMPS , FRANCE Armando Salito/ GULHFI Consulting AG, Switzerland Manfred Rösli/ GULHFI Consulting AG, Switzerland |
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Suspension plasma spraying has clearly shown its potential over the last few years and can offer a big improvement on coatings properties regarding toughness and thermal barriers. Plasmas properties are crucial to control the quality of the deposit in order to obtain the best composition of coating. Nature and proportion of the gas used to maintain the electrical arc could cause fluctuations that create failure inside the thermal treatment and have an impact on the flying particles cinematic. Choosing the good parameters can help to find an optimal way to limit the arc fluctuations while keeping enough plasma power to obtain an effective spraying. The cascade configuration of electrodes used in our torches are showing an improvement on the arc stability compared to conventional plasma torches like the F4 model. This preliminary study aims to show the potential of the new generation of cascaded torches to realize suspension plasma spraying with ceramic coating. To present the cascaded torches potential, we would analyze the in-flight properties of the particles (by spectroscopy method) and make a chemical and mechanical characterization of the ceramic coating. |