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High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes
SJR: 0.19 SNIP: 0.341 CiteScore™: 0.43

ISSN Печать: 1093-3611
ISSN Онлайн: 1940-4360

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

DOI: 10.1615/HighTempMatProc.v13.i1.60
pages 77-91

SPLAT HEAT TRANSFER AND CRYSTAL GROWTH UNDER THERMAL SPRAY CONDITIONS

Y. Lahmar-Mebdoua
Centre de Développement des Technologies Avancées, Algiers, Algeria
Armelle Vardelle
ENSIL, ESTER Technopole, 87068 Limoges - France
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
Dominique Gobin
Laboratoire FAST-URA CNRS 871 (Universites Paris VI et Paris XI) Campus Universitaire − Batiment 502 91405 Orsay Cedex, France

Краткое описание

A recent development in thermal spraying is to design the microstructure of coatings by controlling the sizes of the structural features within the coating so that they exhibit dimensions at the nanoscale. Improvements in performance can be in mechanical properties as well as functional properties. The size of these nano-structured features depend both on the form of the starting material (agglomerates of nanoparticles, liquid precursors) and the process conditions employed during production. Narrowing the crystal size distribution can be obtained from a carefully-controlled nucleation and growth process.
This study presents a one-dimensional heat transfer model of splat cooling and solidification under plasma spray conditions. The model involves melt undercooling, nucleation and crystal growth kinetics. It intends to investigate the effect of the oxidation of various steel substrates, on the size and density of the nucleated grains.


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