Microstructural evolution of the rapidly quenched Fe-Cr-B alloy thermal spray coatings

Authors
Jin, HW Rhyim, YM Hong, SG Park, CG
Citation
Hw. Jin et al., Microstructural evolution of the rapidly quenched Fe-Cr-B alloy thermal spray coatings, MAT SCI E A, 304, 2001, pp. 1069-1074
Citations number
11
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
09215093 → ACNP
Volume
304
Year of publication
2001
Pages
1069 - 1074
Database
ISI
SICI code
0921-5093(20010531)304:<1069:MEOTRQ>2.0.ZU;2-K
Abstract
The microstructural development of Fe-Cr-B alloy thermal sprayings has been investigated by transmission electron microscopy (TEM), Anger electron spe ctroscopy and energy dispersive X-ray microanalysis. The Fe-Cr-B alloy powd er was composed of both Cr-rich boride phases, such as Cr1.65Fe0.35B0.96 an d Cr2B, and alpha-(Fe,Cr) solid solution phase of b.c.c. structure. The bor ide particles dissolved thermally during the thermal spraying process, resu lting in the supersaturation of boron within the nanocrystalline alpha-(Fe, Cr) solid solution phase. Cross-sectional TEM observation for the sprayed c oating layer revealed volume nucleation within a splat and the formation of FeCr2O4 oxide. These can contribute to the evolution of an equiaxed nanocr ystalline alpha-(Fe,Cr) phase. (C) 2001 Elsevier Science B.V. All rights re served.