Plasma sprayed coatings of glass microspheres premixed with Al2O3 particles. (November 2013)

• Record Type: Journal Article
• Authors: Gupta, G.; Satapathy, A.
• Is Part Of: Surface engineering. Volume 29:Number 10(2013)
• Page Start: 755
• Page End: 760
• Publication Date: 2013-11
• Subjects: Coating, -- Characterisation, -- BGM, -- Adhesion, -- Alumina; Surfaces (Technology) -- Periodicals; Coatings -- Periodicals; 620.4405
• DOI: 10.1179/1743294413Y.0000000202
• Languages: English
• ISSNs: 0267-0844

Abstract

Abstract : Plasma sprayed coatings are widely used these days to improve wear, thermal and corrosion resistance of machine components. Although much work have been reported on such coatings made up of a large number of metals and ceramic particles, no effort has so far been made with glass microspheres for this purpose despite its high hardness. In view of this, the present work is undertaken to study the preparation and characterisation of a new class of coatings made up of borosilicate glass microspheres (BGMs) premixed with microsized aluminium oxide (Al2 O3 ) in different proportions. Deposition of BGM/Al2 O3 coatings is done at five different torch input power. The coatings are characterised in terms of their thickness, hardness, adhesion strength, porosity and deposition efficiency. This work reveals that premixing of Al2 O3 results in improved properties in BGM coatings. With fairly good hardness and low porosity, these coatings can be used in many engineering applications.