Thermal spraying of reactive materials to form wear-resistant composite coatings

Journal Article · Sat Feb 29 23:00:00 EST 1992 · Journal of Thermal Spray Technology; (United States)

DOI:https://doi.org/10.1007/BF02657016· OSTI ID:7040436

Dallaire, S ^[1]

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1. National Research Council of Canada, Boucherville (Canada)

The dispersion of more than 20 vol pct submicrometer ceramic particles within a metallic matrix and the deposition of such a cermet to form a thick and tough coating presents problems. Most of the coating techniques have failed in attempting to homogeneously disperse very fine and hard particles in large amounts while avoiding their decomposition or reaction with the metal matrix during the deposition process. A simple and efficient method has been developed for producing ceramic-containing composite coatings. It consists in synthesizing cermet-based materials and in depositing them by a rapid solidification process, such as thermal spraying. Boride- and carbide-based materials have been successfully obtained by plasma spraying reactive powders comprising the basic reagents. These materials, with a microstructure of submicrometer ceramic particles dispersed in a metallic matrix, exhibit good wear-resistant properties (abrasion and sliding wear). Finally, reactive core wire arc spraying is suggested as a flexible way to produce coatings containing up to 25 vol pct TiB2. 25 refs.

• OSTI ID: 7040436
• Journal Information: Journal of Thermal Spray Technology; (United States), Journal Name: Journal of Thermal Spray Technology; (United States) Vol. 1:1; ISSN 1059-9630; ISSN JTTEE
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
ABRASION
BORIDES
BORON COMPOUNDS
CARBIDES
CARBON COMPOUNDS
CERAMICS
CERMETS
COATINGS
COMPOSITE MATERIALS
CRYSTAL STRUCTURE
DEPOSITION
DIMENSIONS
EROSION
MATERIALS
MECHANICAL PROPERTIES
MICROSTRUCTURE
PHASE TRANSFORMATIONS
PLASMA ARC SPRAYING
PROTECTIVE COATINGS
SOLIDIFICATION
SPRAY COATING
SURFACE COATING
THICKNESS
TITANIUM BORIDES
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
WEAR RESISTANCE