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Embedding ceramic particles with a negative thermal expansion coefficient into a metallic corrosion resistant coating can establish a reversible thermal activation of a defined surface microstructure with the aim of having a shark-skin at high temperatures (in use) and self-cleaning at low temperatures (out of use). For that, CoNiCrAlY alloy is intermixed with yttrium and tungsten oxide as powder...
Pure titanium was irradiated by pulsed Nd:YAG laser irradiation in nitrogen atmosphere. As a result, nitrogen uptake and diffusion occurred and a TiN layer was synthesized at the titanium surface. These TiN coatings were analyzed by X-ray diffraction and the diffraction patterns were investigated in detail, in order to obtain more information about the physical processes during the coating formation...
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