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Z. Tang and D. Ellsworth
Northwest Mettech Corp., 467 Mountain Highway, North Vancouver, BC, Canada
ABSTRACT
Suspension plasma spraying is gaining greater interest in commercial applications for durable Thermal Barrier Coatings (TBCs). Mettech’s process, termed as Axial Suspension Plasma Spray (ASPS) is unique as it combines Mettech’s axial injection plasma process and an automatic suspension feed system. With over 6 years of development, the technology is ready for industrial applications, and the ASPS process is being adopted to replace EB-PVD for durable TBCs on aircraft turbines. This paper will present the ASPS development history, development challenges especially on automatic suspension feeder, and axial suspension injection. The ASPS process stability and durability, and some coatings structure and properties will be presented.
Abstract submitted to ITSC 2012 Technology Panel Discussion session: entitled “Advanced Thermal Barrier Coatings: Technology Transition and Applications”,