Nanostructured TiO anatase-rutile-carbon solid coating with visible light antimicrobial activity.

TiO photocatalyst is of interest for antimicrobial coatings on hospital touch-surfaces. Recent research has focused on visible spectrum enhancement of photocatalytic activity. Here, we report TiO with a high degree of nanostructure, deposited on stainless steel as a solid layer more than 10 μm thick by pulsed-pressure-MOCVD.

Polarity of prismatic facets delimiting WC grains in WC-Co alloys.

This study reports a determination of the polarity of WC facets in WC-Co alloys sintered at the liquid state. In these alloys, WC grains are delimited by basal facets and two sets of {10 10} prismatic facets, one set of facets being much more developed than the other. A variation of the shape is observed as a function of the composition of the alloy.

Quantitative analysis of WC grain shape in sintered WC-Co cemented carbides.

The morphology of WC grains is examined by ab initio calculations, and by transmission electron microscopy in a WC-Co cemented carbide. Two compositions are studied to determine the effect of carbon chemical potential on the shape development. The WC grains are found to be truncated triangles, and the grain morphology is adequately reproduced by the ab initio calculations.