Abstract: A process is described for coating parts (1) made of an aluminium alloy, in particular made of a die-cast aluminium alloy, comprising the steps of; pre-treating the parts (1); washing the pre-treated parts (1); and depositing the parts on at least one first layer (3) and at least one second layer (5), each one of the first and the second layer (3, 5) being composed of a mixture of two constituents with variable relative molar fractions: 1) a metallic material, and 2) an oxide-based material of an element of Group IVA of the Periodic Table. A part (1) made of an aluminium alloy is further described, made through the above process.

Abstract: An optical channel (OC) is produced in a tellurite glass (T) by selectively (M) exposing the glass surface to UV laser radiation (L), whereby the exposed areas define an optical channel (OC) photoinduced in the glass (T). The UV laser radiation (L) has a wavelength around 240-270 nm or around 193 nm and may be both continuous wave and pulsed laser radiation. The core of an optical waveguide (OC) can thus be produced in the tellurite glass (T), while a cladding may be provided by means of glass or polymer spinning, sol-gel or other conventional techniques.