Abstract
The investigation of reaction products produced on the tip of tungsten electrodes during the production of titanium- and titaniumalloy-powder by the Rotating-Electrode-Process showed that titanium and titanium alloys can penetrate into cracks of the tungsten electrodes and produce a solid solution between tungsten and titanium. By this reaction a break-away of tungsten particles is avoided. This penetration process was not observed during the production of powder of niobium so that the amount of powder which can be produced by one tungsten electrode doped with thorium oxide from titanium is higher than that which can be produced from niobium.
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References
US Patent 3099041 of July 1963, ref. in: G. H. Gessinger,Powder Metallurgy of Superalloys (Butterworths Monographs in Materials), Butterworths, London, 1984
U. Zwicker, J. Breme, U. Etzold,Poröse Titanwerkstoffe mit niedrigem E-Modul, 7. Vortragsreihe des DVM-Arbeitskreises “Implantate” und der Deutschen Sektion der AO-International, November 18, 1986, Berlin
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Zwicker, U., Breme, J. & Nigge, K. Microprobe analysis of reaction products of titanium and niobium with tungsten. Mikrochim Acta 91, 71–83 (1987). https://doi.org/10.1007/BF01199480
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DOI: https://doi.org/10.1007/BF01199480