Microstructure, deformation and cracking characteristics of thermal spray ferrous coatings

Citation
A. Rabiei et al., Microstructure, deformation and cracking characteristics of thermal spray ferrous coatings, MAT SCI E A, 269(1-2), 1999, pp. 152-165
Citations number
24
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN journal
0921-5093 → ACNP
Volume
269
Issue
1-2
Year of publication
1999
Pages
152 - 165
Database
ISI
SICI code
0921-5093(19990830)269:1-2<152:MDACCO>2.0.ZU;2-L
Abstract
The microstructure and local mechanical characteristics of thermal spray fe rrous coatings have been determined. The emphasis has been on coatings made by the high velocity oxyfuel (HVOF) process, especially the role of Al all oy additives. The oxide phase present in the material and preferred pathway s for local cracking and separation have been determined. Thin intersplat o xide layers emerge as preferential sites. These oxides are amorphous and th e cracks extend along the oxide/alpha-Fe interfaces with low local fracture toughness, in the range 0.2-1 MPa root m. These low toughness pathways gov ern coating deterioration. (C) 1999 Elsevier Science S.A. All rights reserv ed.