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On the evaluation of stability of rare earth oxides as face coats for investment casting of titanium

Saha, RL and Nandy, TK and Misra, RDK and Jacob, KT (1990) On the evaluation of stability of rare earth oxides as face coats for investment casting of titanium. In: Metallurgical and Materials Transactions B, Process Metallurgy and Materials Processing Science, 21 (3). pp. 559-566.

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Abstract

Attempts have been made to evaluate the thermal stability of rare earth oxide face coats against liquid titanium. Determination of microhardness profiles and concentration profiles of oxygen and metallic constituents of oxide in investment cast titanium rods has allowed grActation of relative stability of rare earth oxides. The relative stability of evaluated oxides in the order of increasing stability follows the sequence CeO2 — ZrO2 — Gd2O3 — didymium oxide — Sm2O3 —Nd2O3 — Y2O3. The grading does not follow the free energy data of the formation of these oxides. A better correlation with the experimental observations is obtained when the solubility of the metallic species in titanium is also taken into consideration.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to The Minerals, Metals & Materials Society.
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Depositing User: Ms TV Yashodha
Date Deposited: 27 Apr 2011 06:08
Last Modified: 27 Apr 2011 06:08
URI: http://eprints.iisc.ac.in/id/eprint/34999

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