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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.v9.i3.70
pages 401-413

MACROCRACK FORMATION IN PLASMA-SPRAYED YSZ TBCS WHEN SPRAYING THICK PASSES

A. Tricoire
SPCTS, 123 avenue Albert Thomas, 87060 Limoges cedex, France
Michel Vardelle
LMCTS-URA 320, University of Limoges, 123 Avenue Albert Thomas -87060 Limoges Cedex - 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
F. Braillard
SNECMA Services, ZI Nord, 1 rue Maryse Bastie, BP 129, 86101 Chatellerault cedex, France
A. Malie
SNECMA Services, ZI Nord, 1 rue Maryse Bastie, BP 129, 86101 Chatellerault cedex, France
P. Bengtsson
SNECMA Moteurs, RN 7, BP 81, 91003 Evry cedex, France

Краткое описание

The aim of this work is to study the formation of macrocracks orthogonal to the substrate in yttria-stabilised zirconia coatings, deposited in one or two thick passes (more than a hundred urn each), by a direct current (DC) plasma torch. Zirconia was air plasma sprayed on Hastelloy X substrates, with a NiCrAlY bond coat. The different parameters, which control this phenomenon, are considered through a statistical approach. A special attention is devoted to the quenching stress during deposition. A particular resulting microstructure with columnar zirconia grains is presented. A search of the most influent spray parameters has also been conducted.


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