Books by Keyword: Twins

Description: Energy, and especially its minimization, are factors which govern all physical processes. Given sufficient time and thermal activation, for instance, grain boundaries will move so as to tend towards a regular array of 14-sided grains. When a grain boundary intercepts a surface, the energies of the surface and boundary govern the precise form of the triple-point. Regions of mismatch within the solid, especially those associated with dislocations, interfere with dislocation cross-slip and thereby affect mechanical properties. The present volume comprises a compilation of measured values of the energies of various planar defects in solids: including grain boundaries, stacking-faults, twins, etc. for a wide range of material groups: metals, semiconductors, oxides, carbides, diamond, graphite, nitrides, halides, ice, and various minerals. The 451 entries cover the period from 1958 to 2014.

Description: Lanthanum hexaboride is useful because it possesses a high melting point (2210C), a low work function, one of the highest known electron emissivities, and is stable in vacuum. This volume summarises the extant data on the properties of this material, including the: bulk modulus, conductivity, crystal structure, Debye temperature, defect structure, elastic constants, electronic structure, emissivity, Fermi surface, hardness, heat capacity, magnetoresistance, reflectivity, resistivity, specific heat, surface structure, thermal conductivity, thermoelectric power, toughness and work function. The issue also includes original research papers on: the Pitting Resistance of 316 Stainless Steel in Ringer’s Solution, the Effect of Different Modifiers on the Microstructure and Strength of Locally Developed A356 Al-Si Alloy, the Site Preference of Zr in NiAl Dislocation Cores and its Effects on Bond Character, the Effect of Different Combinations of Salt Modifier on the Mechanical Properties and Microstructure of A356 Al-Si Alloy, Quasicrystalline Phase Formation in High Frequency Induction Melted Al80Cu14Fe6 Alloy, Numerical Investigation of the Effect of Sprue Base Design on the Flow Pattern of Aluminum Gravity Castings, the Evaluation of Surface Preparation Techniques for Steel Substrates Prior to Coating, Thermal Desorption of Hydrogen from AISI 316L Stainless Steel and Pure Nickel, Structural and Concentration Heterogeneities during the Formation of Silicide Phases in the Ti(5nm)/Ni(24nm)/Si(001)Thin-Film System, Studies of the g-Factor and Hyperfine Structure Constant for Ir4+ in CdO, Theoretical Studies of the Local Structures and Spin Hamiltonian Parameters for the Cu2+ Centers in Alkali Barium Borate Glasses, Study of the Properties of CR-39 Polymer Irradiated with Alpha Particles, Review of Diffusion and Interfacial Reactions in Sandwich Thin-Film Couples and the Correlation Coefficient between Vickers Hardness and Nuclear Techniques.

Description: The nickel aluminide intermetallic is a particularly useful alloy for application at high temperatures because, unlike most materials, it exhibits the unusual property of becoming stronger with increasing temperature: depending upon the minor alloying additions, the 0.2% yield strength peaks at between 600 and 800C. The reason for this anomalous behaviour can be traced to the effect of the superlattice structure upon diffusional mass transfer and defect motion. The present volume contains a compilation (350 items, 176 pages) of data specifically covering the known diffusion and defect properties of this material.

Description: This system, consisting of compositions lying between the end-members, CdTe and HgTe, constitutes perhaps the third most important semiconductor after Si and GaAs. Its importance stems from the ability to tailor the band-gap precisely between that (1.5eV) of the semiconductor, CdTe, and the zero value of the semi-metal, HgTe; giving, in particular, one of the most versatile infra-red detectors known. The intermediate compositions also benefit from the usual mechanisms which improve the mechanical properties of alloys.

Description: Defect and Diffusion Forum Vols. 111-112