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Phase relations in the Ti-TiNi-NbNi-Nb region of the ternary system Ti-Nb-Ni

  • Investigation Methods And Properties Of Powdered Materials
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Abstract

We have used microstructural, differential thermal, x-ray phase, and electron probe analysis to study alloys in the Ti-TiNi-NbNi-Nb region of the ternary Ti-Nb-Ni system, both as-cast and annealed at 900°C. We have located a pseudobinary 〈TiNi〉-〈β〉 section, where β is a Nb-rich (Nb, Ti)-based solidsolution. The pseudobinary eutectic point parameters are 1170°C and 38 Ni 26 Nb (at. %). We have found two invariant peritectic four-phase equilibria for crystallization of the alloys in the region of interest: L + TiNi ⇔ β + Ti2Ni (950 °C) and L + β ⇔ TiNi + NbNi (1140°C). We have not confirmed the existence of a ternary compound Ti3(Ni,Nb)2.

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Institute of Materials Science Problems, Ukrainian Academy of Sciences, Kiev. Translated from Poroshkovaya Metallurgiya, Nos. 3/4, pp. 48–54, March–April, 1995.

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Prima, S.B., Tret'yachenko, L.A. & Petyukh, V.M. Phase relations in the Ti-TiNi-NbNi-Nb region of the ternary system Ti-Nb-Ni. Powder Metall Met Ceram 34, 155–160 (1996). https://doi.org/10.1007/BF00559560

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  • DOI: https://doi.org/10.1007/BF00559560

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