Structure and properties of thermal sprayed coatings

Maria Richert 1Marzanna Książek 2Beata Leszczyńska-Madej 1Ilona H. Nejman 1

1. AGH University of Science and Technology (AGH), al. Mickiewicza 30, Kraków 30-059, Poland
2. Instytut Odlewnictwa, ul. Zakopiańska 73, Kraków 30-418, Poland

Abstract

Nowadays the coating technologies are more often applied for covering surfaces of intermediate products and industrial goods. The plasma sprayed technologies are very useful which do not require expensive devices such as example PVD and CVD methods. Plasma sprayed thermal coating is the method which produces multi-layers with the micrometer size of microstructure elements. The microstructure diminishing of plasma sprayed coats is possible by using the innovative methods as High Velocity Oxygen Fuel (HVOF) process. Nanometric structure of layers considerably improved the coating properties. The main aim of the work is investigations of the HVOF carbide Cr3C2 coats and its comparison to the plasma sprayed layers. The multilayer coats consisted from two layers: intermediate NiAl layer and the external Cr3C2 layer were prepared at the Al-Si substrate. The increase of microhardness HVOF coats with the nanometric features was found in comparison to the plasma sprayed coats with the micrometric structure.

 

 

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Presentation: Poster at E-MRS Fall Meeting 2009, Symposium H, by Ilona H. Nejman
See On-line Journal of E-MRS Fall Meeting 2009

Submitted: 2009-05-10 09:33
Revised:   2009-06-22 14:32