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Twenty-six solutions capable of electrodepositing alloys were prepared, electroreduced, and the products examined for uniformity, control of alloy ingredient, and solution stability. In the second phase three solutions were selected from the screening test. Limited experiments were conducted with a nickel manganese alloy, while more extensive experiments were performed with a Co-W and a Co-W-Ni solution. In the third phase the latter two were adapted and improved to function as true electroforming solutions. Test specimens of a cobalt-nickel-tungsten alloy were prepared and tested to obtain tensile strength and hardness data.
This publication documents Proceedings of the Symposium on Metal lurgy and Technology of Refractory Metal Alloys, held in Washington, D.C. at the Washington Hilton Hotel on April 25-26, 1968, under sponsorship of the Refractory Metals Committee, Institute of Metals Division, of the Metallurgical Society of AIME, and the National Aeronautics and Space Administration. The Symposium presented critical reviews of selected topics in refractory metal alloys, thereby contributing to an in-depth understanding of the state-of-the-art, and establishing a base line for further research, development, and application. This Symposium is fifth in a series of conferences on refractory metals, sponsored by the Metallurgical Society of AlME. Publications issuing from the conferences are valuable technical and historical source books, tracing the evolution of refractory metals from early laboratory alloying studies to their present status as useful engineering materials. Refractory metals are arbitrarily defined by melting point. A 0 melting temperature of over 3500 F was selected as the minimum for this Symposium, thus excluding chromium and vanadium, which logically could be treated with other refractory metals in Groups VA and VIA of the periodic table. The Refractory Metals Committee is planning reviews of chromium and vanadium in subsequent conferences.
This project involved an investigation of electroplating of refractory metals, chiefly chromium, from the molten LiF-NaF-KF ternary eutectic. Initial objectives were to establish the mechanisms of the electro-reduction processes, especially for chromium, to explore the conditions that might lead to thick, coherent, electrodeposited coatings of chromium, and to examine the effects of co-deposits of other elements on the properties of the deposits. The electrochemical behavior of other refractory metals, tantalum and niobium, was also examined. (Author).
This collection of papers is from the 1993 TMS annual Meeting held in Denver, Colorado, February 21-25, 1993. It provides a review of the development of refractory metal alloys (those based on vanadium, columbian, niobium, tantalum, molybdenum, tungsten and rhenium) from the 1950s to the present. The technology of many of the leading researchers in this area has been recorded and preserved as a reference for current and future researchers.