Comparison of different hard, metal-like coatings sprayed by plasma and detonation gun processes
- Tampere Univ. of Technology (Finland)
- Fraunhofer Inst. of Ceramic Technologies and Sintered Materials, Dresden (Germany)
Structure and wear properties of atmospheric plasma sprayed and detonation gun sprayed coatings prepared from an experimental (Ti,Mo)C-28.4%NiCo powder were compared to coatings sprayed from commercially available WC-12%Co and Cr{sub 3}C{sub 2}-25%NiCr powders. All powders had an agglomerated (spray dried) and sintered structure and nearly the same content of the metallic binder of approximately 20 vol.-%. The powders were characterized by SEM (morphology and cross-sections) and X-ray diffraction (phase composition). The coatings were studied by optical microscope, microhardness measurements, X-ray diffraction analysis and by abrasion and erosion wear tests. The X-ray diffraction patterns of the coatings show that the (Ti,Mo)C-28.4%NiCo powder is characterized by high phase stability in both spray processes, whereas the WC-12%Co powder is prone to significant phase transformations during spraying. The results clearly show the high potential of the experimental (Ti,Mo)C-28.4%NiCo coatings in substituting the conventional systems in wear applications. For instance, it was found that plasma spraying of the (Ti,Mo)C-28.4%NiCo powder with an Ar-H{sub 2} plasma gas resulted in coatings with wear resistance comparable to WC-12%Co coatings. However, detonation gun sprayed WC-12%Co coatings showed somewhat better abrasion wear resistance.
- OSTI ID:
- 377776
- Report Number(s):
- CONF-9509182-; ISBN 0-87170-541-9; TRN: 96:024988
- Resource Relation:
- Conference: 1995 National thermal spray conference, Houston, TX (United States), 11-15 Sep 1995; Other Information: PBD: 1995; Related Information: Is Part Of Advances in thermal spray science and technology. Proceedings of the 8. national thermal spray conference; Berndt, C.C.; Sampath, S. [eds.]; PB: 795 p.
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
COMPOSITE MATERIALS
SPRAY COATING
MICROSTRUCTURE
MECHANICAL PROPERTIES
TITANIUM CARBIDES
MOLYBDENUM CARBIDES
NICKEL ALLOYS
COBALT ALLOYS
TUNGSTEN CARBIDES
COBALT
CHROMIUM CARBIDES
CHROMIUM ALLOYS
POWDERS
PARTICLE SIZE
SCANNING ELECTRON MICROSCOPY
X-RAY DIFFRACTION
OPTICAL MICROSCOPY
MICROHARDNESS
WEAR RESISTANCE
EROSION
EXPERIMENTAL DATA