Ghosh, Sumana and Chakraborty, R and Dandapat, N and Pal, K S and Datta, Someswar and Basu, Debabrata (2012) Characterization of alumina-alumina/graphite/monel superalloy brazed joints. Ceramics International, 38 (1). pp. 663-670. ISSN 0272-8842

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Abstract

Active metal brazing of alumina with alumina, graphite and monel 404 superalloy was performed at 910 degrees C for 5 min using TICUSIL (68.8Ag-26.7Cu-4.5Ti in wt.%) as the braze alloy in vacuum of 5 x 10(-6) mbar. The brazed joints were characterized by X-ray diffraction, scanning electron microscopy, energy dispersive X-ray analysis, nanohardness and Young's modulus measurements by depth sensitive indentation technique. X-ray diffractrometry showed that the Ti-based compounds were formed at the substrate-filler alloy interfaces of the brazed joints as reaction products. The cross sectional microstructures of the brazed joints were observed by scanning electron microscopy. The energy dispersive X-ray analysis determined the elemental compositions at the selective points of the joint cross section, which supported the X-ray diffraction results. The nanohardness and Young's modulus of the substrate-filler alloy interface showed no abrupt change, which suggests reliable joint performance in service. (C) 2011 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

Item Type:	Article
Uncontrolled Keywords:	Joining; X-ray methods; Microstructure-final; Hardness
Subjects:	Engineering Materials
Divisions:	Bioceramics & Coating
Depositing User:	Bidhan Chaudhuri
Date Deposited:	01 Jun 2012 06:21
Last Modified:	01 Jun 2012 06:21
URI:	http://cgcri.csircentral.net/id/eprint/1445

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