Chemically Deposited Niframe0Wframe1B Coatings: Composition, Structure, and Properties
30.09.2008 г.

Chemically Deposited Niframe0Wframe1B Coatings: Composition, Structure, and Properties1

A. B. Drovosekov, M. V. Ivanov, V. M. Krutskikh, E. N. Lubnin, and Yu. M. Polukarov

 

Institute of Physical Chemistry, Russian Academy of Sciences,
Leninskii pr. 31, Moscow, 119991 Russia

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Received December 26, 2003

 

Abstract - The effect of temperature and solution components of the chemical catalytic reduction on the composition of Ni–W–B alloy coatings is studied. The x-ray photoelectron spectroscopy in combination with the layer-by-layer profile analysis is used to determine the chemical state of elements and the composition of surface and bulk layers of the coatings containing 28 and 1.8 wt % (10 and 12 at. %) tungsten and boron, respectively. The surface of such coatings is shown to contain up to 90 and 80 at. % reduced nickel and boron, respectively. The deposits have amorphous structure. The effect of thermal treatment conditions on the structure and microhardness of the coatings is investigated. The coatings with a tungsten content of 10 at. % are shown to be nonmagnetic.