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High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes
SJR: 0.137 SNIP: 0.341 CiteScore™: 0.43

ISSN Imprimer: 1093-3611
ISSN En ligne: 1940-4360

High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes

DOI: 10.1615/HighTempMatProc.v11.i1.60
pages 71-81

Plasma sprayed basalt/chromium oxide coatings

Helene Ageorges
University of Angers, LETP, 2 Boulevard Lavoisier, 49045 Angers Cedex, France
Z. Medarhri
University of Limoges, SPCTS, 123 Avenue Albert Thomas, 87060 Limoges Cedex, France
P. Ctibor
Institute of Plasma Physics, Za Slovankou 3, 182 00, Praha 8, Czech Republic
Pierre Fauchais
Laboratoire Sciences des Procedes Ceramiques et de Traitements de Surface UMR CNRS 6638 University of Limoges 123 avenue Albert Thomas, 87060 LIMOGES - France

RÉSUMÉ

Volcanic basalt and chromium oxide (Cr2O3) have been co-sprayed in air with a direct current (d.c.) plasma to obtain composite coatings. Both powders were simultaneously injected by two separated injectors. The following spray parameters: arc current, hydrogen vol % and total plasma forming gas mass flow rate were optimized as well as injector positions. Different mass ratios of both components were used to achieve coatings. An uniform distribution of basalt among the Cr2O3 lamellae has been observed with SEM for all composite coatings. XRD showed that chromia became amorphous in the composite basalt/chromia coatings.


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