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Proceedings Paper

Influence of annealing on the morphology and phase composition of plasma-sprayed Ni/Al coatings
Author(s): Sigitas Tamulevicius; Rytis Dargis; Kestutis Slapikas; A. Meskauskas
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Paper Abstract

Thermal annealing of plasma sprayed Ni/Al coatings used as the catalyst was investigated. The coatings were plasma sprayed on Cu substrate at low vacuum conditions (approximately 1 Pa) and were heated at temperatures of 600 degree(s)C and 800 degree(s)C in Ar atmosphere for 5 hours. Scanning electron microscopy and X-ray diffraction were used to study influence of annealing on the morphology and phase transformation in the Ni/Al coatings. A change of morphology of the coatings to smoother and less porous during thermal treatment was observed. Grain size number changes from n equals 5.52 for annealed coatings to n equals 5.37 and n equals 5.26 for coatings annealed at 600 degree(s)C and 800 degree(s)C, respectively. At the same time phase transformation with appearance of new alloys took place. These changes greatly influence other properties of the Ni/Al coatings.

Paper Details

Date Published: 8 April 1999
PDF: 4 pages
Proc. SPIE 3725, International Conference on Solid State Crystals '98: Epilayers and Heterostructures in Optoelectronics and Semiconductor Technology, (8 April 1999); doi: 10.1117/12.344713
Show Author Affiliations
Sigitas Tamulevicius, Kaunas Univ. of Technology (Lithuania)
Rytis Dargis, Kaunas Univ. of Technology (Lithuania)
Kestutis Slapikas, Kaunas Univ. of Technology (Lithuania)
A. Meskauskas, Kaunas Univ. of Technology (Lithuania)


Published in SPIE Proceedings Vol. 3725:
International Conference on Solid State Crystals '98: Epilayers and Heterostructures in Optoelectronics and Semiconductor Technology
Antoni Rogalski; Jaroslaw Rutkowski, Editor(s)

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