Lab for Thin Films - Nanobiomaterials - Nanosystems - Nanometrology


Development of a pilot vacuum system and adaptation of plasma techniques for surface treatment

PAVE 99BE392 (1/1/00-30/6/01)
Coordination by LTFN
AUTh Sci. Responsible : Prof. S. Logothetidis

The aims of the present project include the design and the construction of a pilot vacuum system (dimensions Æ1500x2000, base pressure 10-2mbar) and the adaptation of plasma transferred arc technique for surface treatments. Metallic alloys and ceramic coatings deposited onto steel substrates were compared to those deposited in the atmosphere. X-rays diffractometry (XRD), Scanning electron microscopy (SEM), and micro indentation techniques were used to characterize the coatings in terms of phase identification (XRD), microstructure features and morphology (SEM), and mechanical properties. It was found that coatings developed in vacuum exhibit significantly lower porosity and surface roughness, better crystallinity (bigger crystallites and less structure defects) and were harder than those developed in the atmosphere.

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