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 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 I Related Binary Systems Volume Ix Hf b System written by E. Rudy and published by . This book was released on 1966 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: The binary alloy system hafnium-boron has been invetigated by means of X-ray, metallographic, melting point, and differential-thermoanalytical techniques. The experimental alloy material comprised of hot-pressed and heat-treated, arc- and electron-beam melted, as well as equilibrated and quenched alloy material. All phases of the experimental investigations were supported by chemical analysis. The results of the present investigation, which resulted in the establishment of a complete phase diagram for the system, are discussed and compared with previously established system data. (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 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 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 written by E. Rudy and published by . This book was released on 1966 with total page 52 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 Xi Hf mo b and Hf w b Systems written by David P. Harmon and published by . This book was released on 1966 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 1400 C isothermal sections of the ternary systems hafnium-Molybdenum-boron and hafnium-tungsten-boron have been investigated using X-ray and metallographic techniques. The phase equilibria in both systems are dominated by the hafnium diboride phase, and a new ternary phase was observed in both systems. Cursory melting point investigations were performed in the ternary systems; melting points of the pseudobinary systems HfB2-MoB2 and HfB2-W2B5 were also determined. (Author).
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 Ii Ternary Systems Vol Xiv the Hafnium iridium boron System written by Charles E. Brukl and published by . This book was released on 1967 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: Constitution diagrams of the binary hafnium-iridium and iridium-boron systems as well as an isothermal section of the hafnium-iridium-boron ternary system have been established by means of Pirani melting point investigations, metallography, Debye-Scherrer X-ray, and chemical analysis. There are three intermediate phases, Ir(3)B(2), IrB(0.89), and IrB(1.50) in the rather low melting iridium-boron system which contains four eutectics. Hf2Ir, Hf3Ir2, HfIr(1-x), HfIr, HfIr(1+x), and HfIr3 are the phases present in the hafnium-iridium system. The highest melting phase in this system is HfIr(3) whose melting point is 2460 C. The phase relationships in the central portion of the binary system are quite complex. The ternary hafnium-iridium-boron system has five ternary phases: Hf(.32)Ir(.46)B(.22), Hf(.19)Ir(.49)B(.32), Hf(.07)Ir(.51)B(.42), Hf(.07)Ir(.42)B(.51), and Hf(.02)Ir(.60)B(.38). HfIr3 has an extended solubility for boron. HfB2, which does not form a two-phase equilibrium with iridium, exhibits no solubility into the ternary field. High temperature application possibilities of hafnium-iridium-boron composite borides are briefly discussed. (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 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 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 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 Equilibrium in Transition Metal boron carbon silicon Systems Part Ii Ternary Systems Volume Xii Ti zr b System Investigation of Pseudo binary Systems Zrb2 nbb2 Zrb2 tab2 and Hfb2 nbn2 written by T. E. Eckert and published by . This book was released on 1967 with total page 47 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ternary system titanium-zirconium-boron was investigated from 1000 C to 3245 C, 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 the minimum melting; zirconium exchanges with titanium in titanium monoboride to about 9 At.% zirconium; and the metal diborides form a continuous 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. (Author).
Download or read book Ternary Phase Equilibria in Transition Metal boron carbon silicon Systems Part Ii Ternary Systems Volume Xiii Phase Diagrams of the Systems Ti b c Zr b c and Hf b c written by E. Rudy and published by . This book was released on 1966 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ternary alloy systems Ti-B-C, Zr-B-C, and Hf-B-C have been investigated by means of X-ray, metallographic, melting point, and differential- thermoanalytical techniques. The experimental alloy material comprised of hot- pressed and sintered, arc- and electron-beam molten, as well as high temperature equilibrated and quenched, specimens; each phase of the experimental work was supported by chemical analysis. The results of this investigation are discussed and possible fields of application outlined.
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 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).
