Ghosh, Sumana and Pal, Kalyan Sundar and Dandapat, Nandadulal and Datta, Someswar and Basu, Debabrata (2012) Interfacial properties of metallized alumina ceramics. Metals and Materials International, 18 (4). pp. 625-630. ISSN 1598-9623

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Abstract

An alumina ceramic material (purity-96%) was metallized by the conventional molybdenum-manganese (Mo-Mn) process in which an alumina substrate was coated with Mo-Mn paste and subsequently heat treated at 1400 A degrees C for 10 min. During the entire process a moist H-2 and N-2 gas mixture (dew point-20 A degrees C) with 3:1 ratio was passed continuously through the furnace. X-ray diffraction analysis of the metallized alumina substrate identified only molybdenum phase at the surface of the metallizing layer. The microstructural observations of the metallized alumina substrate were made by scanning electron microscopy. Energy dispersive X-ray analysis showed the elemental compositions along the cross-sectional region of the metallized alumina substrate. The adhesion of the metallic coatings on the alumina substrates was evaluated qualitatively by a scratch testing technique and quantitatively by an adhesion tester. Nanohardness measurements showed gradual change in the nanohardness values across the metallized alumina substrate.

Item Type:	Article
Uncontrolled Keywords:	ceramics; coating; X-ray diffraction; scanning electron microscopy (SEM); mechanical properties
Subjects:	Engineering Materials
Divisions:	Bioceramics & Coating
Depositing User:	Bidhan Chaudhuri
Date Deposited:	01 Nov 2012 08:32
Last Modified:	01 Nov 2012 08:32
URI:	http://cgcri.csircentral.net/id/eprint/1808

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