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Proceedings Papers

Reactive Plasma Spraying of 80:20 Ni/Cr and MCrAlY Powders with Hydrocarbon Reactive Gases

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O. Al-Sabouni, D.J. Stephenson, J.R. Nicholls, G. Creffield
ITSC1998, Thermal Spray 1998: Proceedings from the International Thermal Spray Conference, 1315-1320, May 25–29, 1998,
https://doi.org/10.31399/asm.cp.itsc1998p1315
Abstract
Reactive plasma spraying (RPS) with hydrocarbon (HC) gas has been studied as a way to improve the mechanical properties of Ni-Cr alloys and reduce the oxygen content of MCrAlY coatings. A conventional dc plasma torch has been modified by attaching a conical graphite tube (reactor) onto the end of the gun and spraying parameters were adjusted accordingly. Significant improvements have been achieved in terms of both objectives. As test results indicate, the hardness of Ni-Cr alloys has been doubled and the oxygen content in MCrAlY coatings has been reduced by an order of magnitude.
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