Ordering and Disordering in Alloys

ISBN-13: 9781851667628 / Angielski / Twarda / 1992 / 516 str.

A. R. Yavari; A. R. Yavari

Opis

Proceedings of the European Workshop on Ordering and Disordering held in Grenoble, France, 10-12 July 1991.

Spis treści

Content.- I.- Mechanisms and kinetics in ordering and disordering.- Magnetic properties of disordered Ll2-Ni3Al+Fe.- Kinetic disordering of intermetallic compounds through first- and second-order transitions by rapid solidification.- Kinetic states of order in highly nonequilibrium materials.- Resistivity variations during ordering and disordering.- Calorimetric study of reordering of disordered Ll2,Ni3Al based alloys.- Order parameter and lattice parameter of Ll2 ordered alloys, with special reference to Ni3Al-based alloys.- Ordering kinetics in superalloy type intermetallic compounds in relation with diffusion mechanisms.- Phase transformation and order-disorder in Al-Li observed by high resolution microscopy.- Structural instabilities associated with phase transitions and an electron microscopy study.- Electron microscopy investigation of wetting phenomena in Ll2 alloys.- Long-range ordering kinetics in Ni3Al-based alloys with various ordering energies.- Equilibrium and kinetics of thermal ordering or disordering in Ni3Al.- Investigation of deformation induced disorder and re-ordering by subsequent annealing in Ni3Al+B.- Disordering by plastic deformation of short-range and long-range ordered Ni-based alloys.- Defect recombination phenomena in melt-spun ordered alloys of the Fe-Al system.- Ordering and disordering in CuPt-alloys.- Stochastic description of ordering in driven compounds.- Thermodynamical properties of antiphases in fcc ordered alloys.- CVM treatment of order-disorder transformations.- A Monte Carlo study of the antiphase free energy in fcc ordering transitions.- Interface stability in driven compounds.- Monte Carlo study of the phase stability of ordered fcc phases under irradiation.- LMTO/CVM calculations of partial BCC based phase relations in the system Ni-Al-Ti.- Statistical thermodynamics of ordering systems: an improved quasi-chemical approximation.- Martensitic phase transition in systems with frozen atomic order.- An isothermal calorimetric study of the ordering process in quenched ?-Cu-Zn-Al alloy.- II.- Mechanisms of radiation induced amorphization.- Electron-irradiation-induced crystalline-to-amorphous transition in metallic and non-metallic compounds.- Disordering and amorphization of Zr3Al by 3.8 MeV Zi3+ion bombardment.- Disordering induced by very high energy heavy oins in metallic compounds.- Stability of crystals against melting and vitrification.- On the amorphisation of NiGe alloys by mechanical alloying.- Prediction of metastable alloy formation and phase transformations induced by ion bombardment in binary metal systems.- Investigation of order-disorder in non-crystalline binaries using diffraction methods.- Direct imaging using scanning tunnelling microscopy of the atomic structure in amorphous CO1-xPx.- Computer simulation of glass formation in two dimensional networks.- Crystallization and structural transformations in CoZr2 studied by hydrogen-induced internal friction.- Energetics and statistics of order in alloys with application to oxide superconductors.- Characterization of the mechanical disordering process in the Y-Ba-Cu-O system.- Grain growth and gold tracer diffusion in thin films of nanocrystalline Fe and Fe95Zr5.- Mössbauer study of mechanically alloyed powders.- Mechanical alloying of immiscible elements.- Amorphization induced by ball-milling in some pure elements: Si, Ge.- The effect of concentration gradients on the stability of amorphous layers of ternary alloys.- Thermodynamic aspects of amorphization and deformation in Cu-Ti-TiH2 mixtures.- On the energy transfer mechanism in the ball milling powder processing.- Mössbauer study of Fe-B and (Fe, Co, Ni)-B ultra-fine amorphous powders prepared by chemical reduction.- Temperature dependence of the law of approach to magnetic saturation in nonocrystalline ferromagnets.- Electronic origin of stability of quasicrystals.- Quasicrystals and the concept of interpenetration in m35-approximant crystals with long-range icosahedral atomic clustering.- Application of magic strains to predict new ordered phases: a five-fold coordinated crystal structure for silicon.- Index of contributors.