In this article, changes in structural and electrical properties of surface coatings were investigated after laser remelting. The surface Ni-coating under investigation has been obtained by plasma spraying. Surface remelting was carried out under a pulse Nd:YAG laser. Microstructure evolution and phase identification was investigated by means of optical and scanning microscopy and X-ray microanalysis. Laser remelting eliminated defects and porosity of a surface layer and suppressed the oxide phase. The electrical resistivity of a plasma sprayed layer was decreased and the temperature resistivity coefficient was increased due to these structural changes.

Date Published: 6 October 2003
PDF: 4 pages
Proc. SPIE 5229, Laser Technology VII: Applications of Lasers, (6 October 2003); doi: 10.1117/12.520757

Published in SPIE Proceedings Vol. 5229:
Laser Technology VII: Applications of Lasers
Wieslaw L. Wolinski; Zdzislaw Jankiewicz; Ryszard Romaniuk, Editor(s)