The Liquidus in Cu–O–CaO System at Metallic Copper Saturation up to 1698 K. Issue 1 (10th October 2014)

• Record Type: Journal Article
• Authors: Hamuyuni, Joseph; Hellstén, Niko; Akdogan, Guven; Taskinen, Pekka; Vanderah, T. A.
• Is Part Of: Journal of the American Ceramic Society. Volume 98:Issue 1(2015)
• Page Start: 320
• Page End: 323
• Publication Date: 2014-10-10
• Subjects: Ceramics -- Periodicals; 620.1405
• DOI: 10.1111/jace.13282
• Languages: English
• ISSNs: 0002-7820

Abstract

<abstract abstract-type="main" id="jace13282-abs-0001"> <title> <x xml:space="preserve">Abstract</x> </title> <p>We present experimental results for the liquidus of the pseudo binary system Cu₂O–CaO at metallic copper saturation up to 1698 K in steps of 25 K. In this study, we quantified the liquidus (on the CaO side of the binary) by the equilibration, quench, and analysis technique, with Cu₂O, CaO, and Cu as the only primary crystalline phases. Experiments were conducted in an atmosphere of pure argon up to the critical temperature (1618 K) in the Cu–O system. Above this temperature, experiments were performed at a fixed oxygen pressure of (P_O2 = 1.01 kPa). Equilibrated specimens were quenched in ice‐cold water. We then quantified the liquid chemical compositions by means of energy‐dispersive X‐ray spectroscopy and electron probe micro‐analyzer. Results from this study reveal that below the critical point, some previous studies have overestimated CaO solubility amounts in the molten phase of the system, by up to 4.35 wt% CaO. Thermodynamic modeling of systems containing this binary should therefore also account for this variance.</p> </abstract>