Hot-pressing is a powder metallurgy process where loose powder is loaded into a mould, usually of graphite, and sintered by the simultaneous application of high temperature and pressure. In this study elemental titanium and Ti-6Al-7Nb alloy powders are hot-pressed under different conditions in order to study the influence of the processing parameters on the microstructure and mechanical propert...

Mg2NiH4 thin films have been prepared by activated reactive evaporation in a molecular beam epitaxy system equipped with an atomic hydrogen source. The optical reflection spectra and the resistivity of the films are measured in situ during deposition. In situ grown Mg2NiH4 appears to be stable in vacuum due to the fact that the dehydrogenation of the Mg2NiH4 phase is kinetically blocked. Hydrog...

The utility of the X-ray standing wave technique for the study of electrochemical interfaces is demonstrated. A platinum/carbon LSM (layered synthetic microstructure) with a d spacing of 56 A and with platinum as the outermost layer was used as a substrate. A layer of iodide was adsorbed, followed by the electrodeposition of a layer of copper. Simultaneously monitoring of the reflectivity as we...

The qualitative description of the major microstructure characteristics of microcrystalline silicon is achieved through a threedimensional discrete dynamical growth model. The model is based on three fundamental processes that determine surface morphology: (1) random deposition of particles, (2) local relaxation and (3) desorption. In this model, the incoming particle reaching the growing surfa...

Polycrystalline SrBi2Nb2O9-layered ferroelectric thin films were synthesized on PtyTiySiO2ySi substrate using the polymeric precursors solution. The dip-coated films were specular and crack-free and crystallized during firing at 700 ±C. Single-, double-, and triple-layered films were obtained by several dips in the deposition solution, and the influence of crystallization between each dip was s...

This paper focuses on the development of high temperatures in the cutting zone during high performance grinding. In order to identify the infl uence of grinding temperature on surface integrity, temperatures were measured in the workpiece surface layer under diff erent machining conditions. Beside this, under the same conditions, the surface layer properties of the workpiece material were deter...