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Erosion behavior of EEDS cermet coatings
- Source :
- Applied Surface Science. 254:5470-5474
- Publication Year :
- 2008
- Publisher :
- Elsevier BV, 2008.
-
Abstract
- This paper investigates the erosion performance of electro-thermal explosion directional spraying (EEDS) cermet WC/Co coatings using an air solid particle erosion rig. The influences of the different parameters such as impact angle, impingement velocity, environment temperature, particle diameter, on the erosion property of the coatings were studied. The eroded surfaces were examined by scanning electron microscopy (SEM) equipped with energy dispersive spectrometry (EDS) and the erosion mechanisms were discussed. The structure and bond characters of the coatings were also determined by transmission electron microscopy (TEM), X-ray diffraction (XRD) and SEM. The results indicate that the EEDS WC/Co coatings are characterized by fine grain structure, good metallurgical bond and brittle erosion character. The erosion rates of the coatings decrease with temperature increasing and increase with impact angle and impingement velocity increasing. At elevated temperature, the oxidation happens on the coatings surface, which affects the erosion behavior.
- Subjects :
- Materials science
Scanning electron microscope
General Physics and Astronomy
chemistry.chemical_element
Mineralogy
Surfaces and Interfaces
General Chemistry
Cermet
Condensed Matter Physics
Surfaces, Coatings and Films
chemistry.chemical_compound
Surface coating
Brittleness
chemistry
Transmission electron microscopy
Tungsten carbide
Erosion
Composite material
Cobalt
Subjects
Details
- ISSN :
- 01694332
- Volume :
- 254
- Database :
- OpenAIRE
- Journal :
- Applied Surface Science
- Accession number :
- edsair.doi...........c503f510027b59add94c5f975087265f