Output signal characteristics of thyristor- and transistor-controlled power supplies and its influence on the electric discharge in a plasma spray process

Thursday, May 14, 2015: 8:40 AM
Room 102B (Long Beach Convention and Entertainment Center)
Hartmut Koschnitzke , Oerlikon Metco AG (Switzerland), Wohlen, Switzerland
Dr. Majid Nabavi , Oerlikon Metco AG Wohlen, Wohlen, Switzerland
Mr. Uwe Jagow , Oerlikon Metco, Wohlen, Switzerland
Dr. Alexander Schwenk , Sulzer Metco AG (Switzerland), Wohlen, Switzerland

Output signal characteristics of  thyristor- and transistor-controlled  power supplies and its influence on the electric discharge in a plasma spray process

Hartmut Koschnitzke, Dr. Majid Nabavi, Dr.-Ing. Alexander Schwenk, Oerlikon Metco AG, Wohlen

In this study  two different types of power supplies are used in order to analyze the influence of the current output characteristics on the electric discharge characteristics. Three different plasma spray guns,   F4, 9MB and SinplexPro, will be studied with the use of three different powder feedstock materials (Metco 101NS, Metco 204NS and Amdry 6420)  by measuring the real-time gun voltage as well as the frequency spectra of the electric discharge during the spray process. In addition, a metallurgical analysis of the spray coating will be done in order to investigate the influence of the electric discharge characteristics on the spray coating quality in terms of the average coating porosity, hardness, degree of oxidation and microstructure.

See more of: Diagnostics & Characterization
See more of: Fundamentals/R&D