The 1300 8 C isothermal section in the Nb – Sn – C ternary phase diagram
نویسنده
چکیده
In this paper we map out the 1300 8C isothermal section in the Nb–Sn–C ternary system. The results show that the only ternary compound in the system, Nb SnC, is in equilibrium with Sn, NbC , and Nb Sn, but not with Nb, Nb C or C. The Nb SnC phase is not a 2 x 3 2 2 stoichiometric compound but exists over a range of compositions that range from an Nb:Sn:C ratio of |54:22:24 at.%, when in equilibrium with NbC and Nb Sn, to |49:28:23 at.% when in equilibrium with NbC and Sn. Assuming, the Nb and Sn sublattices to be 3 fully occupied these chemistries translate to: Nb Sn C and Nb Sn C , respectively. When in equilibrium with NbC and 2.2 0.8 0.93 1.92 1.08 0.91 Nb SnC, Nb Sn can dissolve up to 5 at.% C. Similarly, Nb can simultaneously dissolve 2.5 at.% and 4.6 at.% of Sn and C, respectively. 2 3 A correlation was also found between the lattice parameters and the Nb-concentration. 2002 Elsevier Science B.V. All rights reserved.
منابع مشابه
The 13001C Isothermal Section in the Ti–In–C Ternary Phase Diagram
In this paper we map out the 13001C isothermal section in the Ti–In–C ternary system. Two ternary compounds exist: Ti2InCa and Ti3InCd. At 13001C TiCx is in equilibrium with all phases, Ti3InCd is in equilibrium with all the phases except C, and Ti2InC is in equilibrium with all phases except Ti and C. The range of d in Ti3InCd varies from 0.95 to 0.8. A correlation was found between d and the ...
متن کاملPhase relations in the Nb–Ni–Cr system at 1,100 °C
ABSTRACT The isothermal cross section through the ternary phase diagram Nb-Ni-Cr at 1,100 °C was constructed by means of diffusion couples and equilibrated alloys. It was found that nearly 28 at.% of Cr can be dissolved in the μ phase (Nb7Ni6) at this temperature, and the solubility of chromium in NbNi3 is approximately 5 at.%. Under these circumstances the low-temperature (cubic) modification ...
متن کاملBeta Ti Alloys with Low Young’s Modulus
Composition dependence of Young’s modulus in Ti-V and Ti-Nb binary alloys and Sn-added ternary alloys quenched from phase region was investigated at room temperature in relation to the stability of phase. A minimum of Young’s modulus in the binary alloys appears at such a composition that athermal ! phase transformation is almost completely suppressed. Formation of isothermal ! phase by aging a...
متن کاملTernary Phase Diagram Modeling of Chiral Medetomidine Salts Using NRTL-SAC Model
Experimental determination of solubility and ternary phase diagram of chiral compound are of tedious and time consuming tasks, and in many cases, there is not enough experimental data for different enantiomeric compositions to access the experimental ternary phase diagram. Using thermodynamic models with predictive capability, having less dependency on experimental data, affords a great advanta...
متن کاملInteraction of Lanthanum with Boron and Carbon: Phase Diagram and Structural Chemistry
8 The isothermal section of the La–B–C phase diagram at 1270 K has been investigated by 9 means of X-ray, neutron powder diffraction, microstructure and EPMA analyses. Eight ternary 10 compounds were found, and for six of them the crystal structures have been established. The 11 phase with the structure type of La5B2C6 has a broad homogeneity range described by the 12 formula La5(BC)x (5.6x8....
متن کامل