Download or read book Ternary Phase Equilibria in Transition Metal boron carbon silicon Systems Part Ii Ternary Systems Volume Iii Zr ta c System written by D. P. Harmon and published by . This book was released on 1965 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ternary zirconium-tantalum- carbon system was investigated using X-ray, DTA, melting point, and metallographic techniques on chemically analyzed alloys; a complete phase diagram for temperatures above 1000 C was established. The system contains a high melting continuous solid solution of binary monocarbide phases; a moderate zirconium-tantalum exchange occurs in both the high and low temperature modifications of the subcarbide, Ta2C. Two four-phase reaction planes and two limiting tie-lines are present in the metal-rich portion of the ternary diagram. A minimum melting point occurs in the zirconium-rich portion of the ternary. The results of this investigation are described and discussed; selection of alloys for general high temperature applications is discussed in the light of the results of the Zr-Ta-C investigation. A brief thermodynamical evaluation of the system is given along with a calculated isothermal section at 1500 C. (Author).
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 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 Ix Zr w b System and the Pseudobinary System Tab2 hfb2 written by Y. A. Chang and published by . This book was released on 1966 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: The solid state phase equilibria of the system Zr-W-B at 1400 C and the phase equilibria in the melting range for the four pseudobinary systems: ZrB2-W2B5-ZrB2-WB, ZrB2-W2B and ZrB2-W have been investigated using X-ray technique, melting point determinations and metallographic examinations. At 1400 C, the intermetallic phase ZrW2 and the four tungsten-boron intermediate phases were found to be in equilibrium with ZrB2. Two ternary phases, one possibly stable only at high temperatures, were indicated to exist in this system. The pseudobinary system, TaB2-HfB2 forms a series of continuous solid solutions. The melting points increase smoothly from pure TaB2 to HfB2. (Author).
Download or read book Ternary Phase Equilibria in Transition Metal boron carbon silicon Systems Part Ii Ternary Systems Volume Vi Zr hf b Systems written by David P. Harmon and published by . This book was released on 1965 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ternary system zirconium-hafnium-boron has been established for temperatures above 750 C with the air of melting point, X-ray, and metallographic investigations of chemically analyzed alloys. A brief thermochemical evaluation of the system was made at 1400 C, and the Gibbs free energies of formation for both the hafnium monoboride and hypothetical zirconium monoboride were calculated. The zirconium-hafnium system was reviewed using differential-thermal analytical techniques, and the proposed binary diagram is given. (Author).
Download or read book Ternary Phase Equilibria in Transition Metal boron carbon silicon Systems Part Ii Ternary Systems Volume Iv the Ti zr c Ti hf c and Zr hf c Systems written by C. E. Brukl and published by . This book was released on 1966 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt: Solid-state sections of the ternary Ti-Zr-C and Ti-Hf-C systems were investigated; the complete Zr-Hf-C system was studied from 1600 C to melting using X-ray, DTA, melting point, and metallographic techniques on chemically analyzed alloys; a complete phase diagram for the Zr-Hf-C system for temperatures above 1600 C was established. The hafnium metal used contained 4 At.% zirconium. The Ti-Zr-C system contains a miscibility gap in the monocarbide region; the miscibility gap is completely closed at temperatures above approximately 2150 C.A miscibility gap is also present in the Ti-Hf-C system in the monocarbide region; complete solid solubility exists between the binary monocarbides at temperatures above approximately 2050 C. The Zr-Hf-C system contains a high melting, continuous monocarbide solid-solution in a carbon defect lattice. The a-hafnium phase is stabilized toward higher temperatures by carbon; this phase shows a moderate solubility for carbon and zirconium. One four-phase reaction plane is present in the metal-rich portion of the ternary diagram. The results of these investigations are described and discussed; application possibilities are briefly mentioned. (Author).
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 1965 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ternary Phase Equilibria in Transition Metal boron carbon silicon Systems Part 2 Ternary Systems Vol 1 Ta hf c System written by E. Rudy and published by . This book was released on 1965 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ternary alloy system tantalum-hafnium-carbon was investigated by means of X-ray, DTA, melting point, and metallographic techniques on chemically analyzed alloys, and a complete phase diagram for temperature above 1000 deg C was established. The system is characterized by a very high melting solid solution of the refractory monocarbides in both binary systems, and a limited exchange of hafnium in the low- and high-temperature modification of Ta2C. Four Class II four-phase reaction planes as well as three limiting tie lines occur in the concentration area metal-monocarbide solution. The results of this investigation are discussed and compared with previous, partial investigations of this system. Fields of application are outlined.
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 written by E. Rudy and published by . This book was released on 1967 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ternary Phase Equilibria in Transition Metal boron carbon silicon Systems written by C. E. Brukl and published by . This book was released on 1968 with total page 72 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 V Ti hf b System written by Y. A. Chang and published by . This book was released on 1966 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt: A complete phase diagram for the ternary alloy system titanium-hafnium-boron from 1000 C through the melting ranges of the diborides was established on the basis of X-ray, melting point and metallographic studies. The outstanding features of the system are that both the metal diborides and monoborides form continuous solid solutions with respect to metal exchange. From the distribution of the tie-lines in the metal monoboride two-phase field, the Gibbs free energy difference between the titanium monoboride and hafnium monoboride was derived. (Author).
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 1967 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 1968 with total page 36 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 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.
