Download or read book Ternary Phase Equilibria in Transition Metal boron carbon silicon Systems Part 4 Thermochemical Calculations Volume 2 Thermodynamic Interpretation of Ternary Phase Diagrams written by Erwin Rudy and published by . This book was released on 1966 with total page 185 pages. Available in PDF, EPUB and Kindle. Book excerpt: The equilibrium conditions for two-phase and three-phase equilibria in ternary systems are derived from the minimum condition for the free energy, and special solutions are discussed on model examples. The predictive capabilities of the thermodynamic approach are demonstrated on a number of refractory carbide systems, and methods for the determination of phase stabilities from experimental phase equilibrium data are outlined. The thermodynamic discussions are supplemented by a general review of recent phase diagram work on refractory transition metal-B element systems.
Download or read book Ternary Phase Equilibria in Transition Metal boron carbon silicon Systems Part 4 Thermochemical Calculations Volume 1 Thermodynamic Properties of Group Iv V and Vi Binary Transition Metal Carbides written by Y. A. Chang and published by . This book was released on 1965 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: All available data concerning the thermodynamic properties of the group IV, V, and VI binary metal carbides have been critically evaluated and the values judged to be most reliable were selected. The compositional variation of the free energies of the group IV binary metal carbides has been calculated based on theoretical models.
Download or read book TERNARY PHASE EQUILIBRIA IN TRANSITION METAL BORON CARBON SILICON SYSTEMS PART 4 THERMOCHEMICAL CALCULATIONS VOLUME 3 COMPUTATIONAL APPROACH TO THE CALCULATION OF TERNARY PHASE DIAGRAMS written by and published by . This book was released on 1966 with total page 81 pages. Available in PDF, EPUB and Kindle. Book excerpt: The general conditional equations which govern the phase equilibria in three-component systems are presented. Using the general conditional equations, a general method has been developed to precalculate the phase equilibria in three-component systems from first principle using computer technique. The method developed has been applied to several model examples and the system Ta-Hf-C. The phase equilibria in three-component systems calculated using the simplified method as originally developed by Rudy, agree well with those calculated by the present method. The only difference is in the homogeneous range with respect to the interstitial component of solid solutions which exhibit large variation with metal exchange. This is to be expected in view of the assumptions made in the simplified method.
Download or read book Technical Abstract Bulletin written by and published by . This book was released on with total page 812 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ternary Phase Equilibria in Transition Metal boron carbon silicon Systems Part Ii Ternary Systems Volume Viii Ta w c System written by E. Rudy and published by . This book was released on 1966 with total page 141 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ternary alloy system Ta-W-C has been investigated by means of X-rays, metallographic, melting point, and differentila-thermoanalytical techniques, and a complete phase diagram was established. Thermodynamic approaches for the interpretation and prediction of ternary alloy systems are briefly discussed and applied to the tantalumtungsten-carbon system. The thermodynamic data obtained from an evaluation of the system sections are compatible with previous values obtained from other carbide systems, and the calculated temperature sections and isopleths are in good agreement with the experimental observations. The results of this investigation are discussed and possible fields of applications outlined. (Author).
Download or read book Phase Diagrams for Ceramists written by Ernest M. Levin and published by . This book was released on 1964 with total page 494 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ternary Phase Equilibria in Transition Metal boron carbon silicon Systems Part I Related Binary Systems Volume 4 Hf c System written by Erwin Rudy and published by . This book was released on 1965 with total page 63 pages. Available in PDF, EPUB and Kindle. Book excerpt: The alloy system hafnium-carbon was investigated by means of X-ray, DTA, and melting point techniques on chemically analyzed alloys, and a complete phase diagram was established. The results are discussed and compared with previously reported data.
Download or read book Ternary Phase Equilibria in Transition Metal boron carbon silicon Systems Part I Binary Systems Volume Xii Revision of the Vanadium carbon and Niobium carbon Systems written by Erwin Rudy and published by . This book was released on 1967 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: The binary systems vanadium-carbon and niobium-carbon were reinvestigated by means of X-ray, melting point, DTA, and metallographic techniques on chemically and thermally characterized specimens; revised phase diagrams for both binary systems are given. In addition, recent investigations have also shown that some of the intermediate phases exhibit a more complex thermal behavior than previously anticipated. Thus, for example, the thermodynamic evaluation of the equilibria in ternary metal-carbon systems pointed to the existence of sublattice order-disorder transformations in the Me2C phases. These indications have, in the meantime, been confirmed experimentally by X ray and differential-thermoanalytical means.
Download or read book Ternary Phase Equilibria in Transition Metal boron carbon silicon Systems Part I Related Binary Systems Volume X Systems V b Nb b and Ta b written by E. Rudy and published by . This book was released on 1966 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: The binary systems V-B, Nb-B, and Ta-B have been investigated by means of X-ray, metallographic, melting point, and differential-thermo-analytical techniques, and complete phase diagrams for all three systems were established. The results of this investigation are discussed and critically compared with available data from the literature. (Author).
Download or read book Ternary Phase Equilibria in Transition Metal boron carbon silicon Systems Part I Related Binary Systems Volume Iii Systems Mo b and W b written by Erwin Rudy and published by . This book was released on 1965 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: On the basis of X-ray, melting point, metallographic, and differential thermoanalytical studies on molybdenum-boron and tungsten-boron alloys, constitution diagrams for both binary systems are presented. In the high temperature regions, the newly established phase diagrams differ significantly from previously reported systems. The results are discussed and compared with available literature data. (Author).
Download or read book Ternary Phase Equilibria in Transition Metal Boron Carbon Silicon Systems Part 2 Ternary Systems Volume 12 Ti Zr B System Investigation of Pseudo Binary Systems ZrB2 NbB2 ZrB2 TaB2 and HfB2 NbB2 written by and published by . This book was released on 1966 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ternary system titanium-zirconium-boron was investigated from 1000C to 3245C, the melting temperature of zirconium diboride. The equilibria which exist have been determined except for the boron-rich equilibria which have been estimated. The following notable features were found: minimum melting occurs in the titanium rich corner of the ternary; a four-phase reaction involving Beta-metal phase, monoboride, diboride, and liquid occurs at a temperature slightly higher than theminimum melting; zirconium exchanges with titanium in titanium monoboride to about 9 At. % zirconium; and the metal diborides form a continuos series of solid solutions. No ternary compounds were found. The techniques used in the investigation were X-ray analysis, melting point determination, and metallographic examination. Lattice parameter plots of the pseudo-binary systems ZrB2-NbB2, ZrB2-TaB2, and HfB2-NbB2 indicate that in each of these systems the diborides form a continuous series of solid solutions. Melting point temperatures for these systems have been determined.
Download or read book Ternary Phase Equilibria in Transition Metal boron carbon silicon Systems Part Ii Ternary Systems Volume Xvii Constitution of Ternary Ta mo c Alloys written by E. Rudy and published by . This book was released on 1967 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ternary system tantalum-molybdenum-carbon was investigated by means of X-ray, melting point, DTA, and metallographic techniques on chemically and thermally characterized specimens; a complete phase diagram for temperatures above 1500C was established. The observed phase relationships are thermodynamically analyzed and the calculated temperature sections are found to be in good agreement with the experimental observations. (Author).
Download or read book Ternary Phase Equilibria in Transition Metal boron carbon Silicon Systems Part Ii Ternary Systems Volume Xv Constitution of Niobium molybdenum carbon Alloys written by Erwin Rudy and published by . This book was released on 1967 with total page 67 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ternary alloy system niobium-molybdenum-carbon was investigated by means of X-ray, melting point, DTA, and metallographic techniques; a complete phase diagram for temperatures above 1500 C was established. Above 1960 C, niobium monocarbide and the cubic (B1) high temperature phase in the molybdenum-carbon system form and uninterrupted series of solid solutions. Six isothermal reactions occur in the ternary system; three correspond to class II-type four-phase reactions involving a liquid phase, one to a class I (eutectoid)-type, and two further isotherms are associated with limiting tie lines. The results of the phase diagram investigation are discussed, and the thermodynamic interpretation identifies the low relative stability of the binary subcarbides in conjunction with the large stability differences between niobium and molybdenum carbides as the cause for the formation of a stable equilibrium between the monocarbide and the metal phase in the ternary region.
Download or read book Ternary Phase Equilibria in Transition Metal boron carbon silicon Systems Part 1 Related Binary Systems Volume 5 Ta c System Partial Investigation in the Systems Nb c and V c written by E. Rudy and published by . This book was released on 1965 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: The alloy system tantalum-carbon was investigated by means of X-ray, DTA, and melting point techniques on heat-treated and chemically analyzed alloys; a complete phase diagram was established. Analogously to the findings in the Ta-C systems, a previously unknown phase reaction of the Nb2C phase was found to occur at high temperatures. The melting temperatures of the monocarbide phase and the NbC-C eutectic reaction isotherm were redetermined. The alpha- beta-Me2C-phase reaction could not be found in the vanadium-carbon system.
Download or read book Ternary Phase Equilibria in Transition Metal boron carbon silicon Systems Part 5 Compendium of Phase Diagram Data written by E. Rudy and published by . This book was released on 1969 with total page 732 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report contains a summary of phase diagram work conducted over the time period from 1 January 1964 through April 1969. Systems studied include binary transition metal systems, binary and ternary systems of refractory transition metals with carbon, boron, silicon, and nitrogen, and selected concentration-temperature sections of higher order systems involving the same elements.
Download or read book Ternary Phase Equilibria in Transition Metal boron carbon silicon Systems written by E. Rudy and published by . This book was released on 1966 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ternary Phase Equilibria in Transition Metal Boron Carbon Silicon Systems Part 1 Related Binary Systems Volume 1 Mo C System written by and published by . This book was released on 1965 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: A complete phase diagram of the system molybdenum-carbon is presented. A thermodynamic model for the description of the phase separations of the Me2C phases in transition metal-carbon systems has been developed and was semiquantitatively applied to Mo2C. Literature data on thermodynamic properties of molybdenum carbides have been critically evaluated and data were selected. Apparative techniques for the precise study of phase reactions at high temperatures are described.
