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Influence of critical parameters on the properties of plasma sprayed coatings prepared from spray dried alumina powder

IR@NAL: CSIR-National Aerospace Laboratories, Bangalore


Field	Value

Title	Influence of critical parameters on the properties of plasma sprayed coatings prepared from spray dried alumina powder

Creator	Aruna, ST Balaji, N

Subject	Chemistry and Materials (General)

Description	Plasma sprayable -alumina powder was prepared by spray drying process. The powder was characterized by field emission scanning electron microscopy (FESEM), powder X-ray diffractometry, particle size analysis and flowability measurement. In the present work, the influences of three different critical plasma spray parameter (CPSP) values (675, 825 and 937.5 W/nl.pm) on the crystallographic forms, microstructure, microhardness, surface roughness, wear and corrosion resistance of the plasma sprayed alumina coatings were investigated. The coatings were characterized by X-ray diffractometry and the analysis revealed the presence of some traces of -alumina along with -alumina for the coating obtained at higher CPSP. The surface roughness, microhardness, corrosion and wear resistance of the coatings were evaluated. Plasma sprayed alumina coating obtained at the highest CPSP exhibited improved wear and corrosion resistance compared to the other two coatings which is attributed to the dense nature of the coating.

Publisher	The Indian Ceramic Society

Date	2014

Type	Journal Article PeerReviewed

Format	application/pdf application/pdf

Identifier	http://nal-ir.nal.res.in/12221/1/ja533.pdf http://nal-ir.nal.res.in/12221/2/ja533POST.pdf Aruna, ST and Balaji, N (2014) Influence of critical parameters on the properties of plasma sprayed coatings prepared from spray dried alumina powder. Transactions of the Indian Ceramic society, 73 (4). pp. 1-6. ISSN 0371-750X

Relation	http://dx.doi.org/10.1080/0371750X.2014.969773 http://nal-ir.nal.res.in/12221/