Thermodynamic Properties of Platinum-rich Intermetallics in the Pt-Gd System

Jacob, KT and Waseda, Y (1990) Thermodynamic Properties of Platinum-rich Intermetallics in the Pt-Gd System. In: Materials Transactions, JIM, 31 (2). pp. 135-140.

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Abstract

Phase relations in the Pt-GdPt portion of the system have been determined at 1100 K by X-ray and microscopic examination of quenched samples equilibrated for 610 ks. Five compounds have been identified; $GdPt_5$, $`GdPt_3'$, $GdPt_2$, $Gd_3Pt_4$ and GdPt. The phase $GdPt_3$ with $AuCu_3$ type structure has not been reported earlier. The compound $GdPt_3$ is nonstoichiometric with a homogeneity range extending from 23 to 28 mol% Gd. The phase $GdPt_2$ has a narrower nonstoichiometric range varying from 32 to 33 mol% Gd. The relative partial Gibbs' energy of Gd in the two-phase fields has been determined in the temperature range 925-1125 K using solid state galvanic cells incorporating single crystal $CaF_2$ as the solid electrolyte and an equimolar mixture of $Gd + GdF_3$ as the reference electrode.

Item Type:	Journal Article
Publication:	Materials Transactions, JIM
Publisher:	The Japan Institute of Metals
Additional Information:	Copyright of this article belongs to The Japan Institute of Metals.
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	30 Jul 2007
Last Modified:	30 Jan 2012 06:52
URI:	http://eprints.iisc.ac.in/id/eprint/11616

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