When solid particles of different types are mixed together, a random distribution of the components is rarely produced and deterioration of the mixture can occur on subsequent handling. Among the microscopic processes responsible, one important mechanism for free-flowing materials is thought to be interparticle percolation, the drainage of particles through the interstices between larger ones. If the larger particles are stationary this is ca ... [truncated at 450 characters in length]
|Author||Cooke, Michael H.;|
|Subject||Cohesion Materials Mechanical properties Particles|
This thesis describes a series of fretting fatigue experiments carried out under closely controlled conditions of partial slip. These experiments confirm the existence of a size effect whereby the fretting fatigue life of an aluminium alloy is shown to vary with contact size.
The configuration chosen, of cylindrical fretting pads contacting a plane specimen is amenable to classical stress analysis and the surface tractions between the co ... [truncated at 450 characters in length]
|Subject||Contact mechanics Fretting corrosion Materials Fatigue Testing|
This thesis describes results obtained using high resolution electron microscopy, acoustic microscopy and chemical analysis to study the structure and properties of the superionic β-aluminas.
The acoustic microscopy and chemical analysis results relate solely to sodium β- and β" -alumina, which are used as the solid state electrolyte in the sodium/sulphur cell.
The high resolution electron microscopy results cover sodium β- and β" ... [truncated at 450 characters in length]
|Subject||Superionic conductors Materials Defects|
|Abstract||Excitonic transitions offer a possible route to ultrafast optical spin manipulation in coupled nanostructures. We perform here a detailed study of the three principal exciton-mediated decoherence channels for optically controlled electron spin qubits in coupled quantum dots: radiative decay of the excitonic state, exciton-phonon interactions, and Landau-Zener transitions between laser-dressed states. We consider a scheme for producing an entangli ... [truncated at 450 characters in length]|
|Author||Erik M. Gauger; Ahsan Nazir; Simon C. Benjamin; et al|
|Subject||Materials Physics Atomic and laser physics|