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THE ISOTHERMAL SECTIONS AT 1200℃ OF THE EQUILIBRIUM DIAGRAMS OF THE SYSTEMS Mo-Ti-Zr AND Mo-Nb-Zr |
CHUANG Y-CHIH; T'ANG CH'AN-HONG; CHUANG HSIANG-LIN |
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Cite this article:
CHUANG Y-CHIH; T'ANG CH'AN-HONG; CHUANG HSIANG-LIN. THE ISOTHERMAL SECTIONS AT 1200℃ OF THE EQUILIBRIUM DIAGRAMS OF THE SYSTEMS Mo-Ti-Zr AND Mo-Nb-Zr. Acta Metall Sin, 1966, 9(1): 63-124.
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Abstract The isothermal sections at 1200℃ of the systems Mo-Ti-Zr and Mo-Nb-Zr have been determined by metallographic and X-ray diffraction methods supplemented by hardness measurements. The constitutions of these two systems are strikingly similar; besides a b.c.c, ternary terminal solid solution and a ternary Laves phase isomorphous with MgCu_2 structure, no new intermediate phase has been found.In the Mo-Ti-Zr system the lattice parameter of the ternary solid solution increases with the increase of Ti or Zr in solid solution, and the ternary Laves phase is (Ti, Zr) Mo_2. In the Mo-Nb-Zr system, the lattice parameter of the ternary solid solution also increases with the increase in the Nb- or Zr-content, and the ternary phase in this case is Zr(Mo, Nb)_2.The iso-hardness contours of the Mo-Ti-Zr system tend to expand towards the titanium corner as the Ti-content is increased, whereas those of the Mo-Nb-Zr system expand towards the niobium corner with the increase in Nb-content in a like manner.
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Received: 18 January 1966
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