Detonation gun and plasma spraying of amorphous metal coatings with improved corrosion resistance: Simulation and experiment

Conference · Sun Dec 31 04:00:00 EST 1995

OSTI ID:377765

Shmyreva, T; Mukhin, A; Mukhina, L ^[1]

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1. State Metallurgical Academy of Ukraine, Dnepropetrovsk (Ukraine)

Coating formation in detonation gun or plasma spraying involves direct contact of molten particles with cool metal of the substrate, which results in extra high cooling rates in the melt and enables synthesis of coatings with amorphous or metastable crystalline structure. Mathematical modeling of detonation gun and plasma spraying was carried out to determine the physical and engineering parameters for producing hard corrosion resistant coatings. For an iron-base (Fe-Cr-P-C) and a nickel-base (Ni-Cr-Si-B-C) eutectic alloy, spraying process parameters were determined theoretically. Purely amorphous or amorphous-crystalline coatings can be produced by detonation gun and plasma spraying with the use of values of individual layer thickness, pulse separation, powder feed rate, etc. thus obtained. The structure of these coatings whose hardness may be as high as 1,100 HV was described in more detail in a previous paper. Amorphous coatings are shown to outperform 304 stainless steel in resistance to corrosion in hydrochloric acid by no less than an order of magnitude.

• OSTI ID: 377765
• Report Number(s): CONF-9509182--; ISBN 0-87170-541-9
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AMORPHOUS STATE
BORON ALLOYS
CARBON
CHROMIUM ALLOYS
COOLING
CORROSION RESISTANCE
CURRENT DENSITY
ELECTROCHEMICAL CORROSION
EUTECTICS
HEAT TRANSFER
HYDROCHLORIC ACID
IRON BASE ALLOYS
LIQUID METALS
MATHEMATICAL MODELS
NICKEL BASE ALLOYS
PHOSPHORUS
POWDERS
SILICON ALLOYS
SPRAY COATING