Laser induced structural and microstructural transformations of plasma sprayed Al2O3 coatings

Air plasma sprayed Al2O3 coatings on metallic substrates suffer from porosities and metastable polymorphs. In this study, laser treatment employed to improve the coating properties resulted in transformation of the as-sprayed coating predominantly consisting of metastable gamma-Al2O3 into thermodyna...

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Veröffentlicht in:	Scripta materialia 2001-09, Vol.45 (6), p.693-700
Hauptverfasser:	KRISHNAN, R, DASH, S, BABU RAO, C, SUBBA RAO, R. V, TYAGI, A. K, RAJ, Baldev
Format:	Artikel
Sprache:	eng
Schlagworte:	Cross-disciplinary physics: materials science rheology Exact sciences and technology Materials science Methods of deposition of films and coatings film growth and epitaxy Physics Spray coating techniques
Online-Zugang:	Volltext
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Zusammenfassung:	Air plasma sprayed Al2O3 coatings on metallic substrates suffer from porosities and metastable polymorphs. In this study, laser treatment employed to improve the coating properties resulted in transformation of the as-sprayed coating predominantly consisting of metastable gamma-Al2O3 into thermodynamically stable alpha-Al2O3 phase with enhanced microhardness and reduced surface roughness. (Author)
ISSN:	1359-6462 1872-8456
DOI:	10.1016/S1359-6462(01)01081-8