Revue Nature et Technologie
Volume 3, Numéro 2, Pages 9-11
2011-06-30
Authors : Khechba Mourad . Hanini Faouzi . Halimi Rachid .
Hard coatings of tungsten carbides have been obtained by the deposition of tungsten thin layers, on steel substrates (containing 0.7% wt. carbon), according to the cathodic magnetron sputtering held at temperature of 500°C. It is established by X-rays diffraction that, in the temperature range 500-800°C, no formation of tungsten carbides was observed. However, the annealing at a temperature greater than or equal to 900°C promotes the reaction between the constituents of the samples (W, Fe, C) and hence the formation of W C carbide. No other compounds were detected. The micro-hardness measured by Vickers tests, increases with the rise in temperature, particularly from 900°C. The morphology of the surface samples depends on the temperature and duration of thermal annealing.
Thin films, RF magnetron sputtering, Coating, tungsten carbides.
Harkati C
.
Chekour L
.
Halimi R
.
pages 59-62.
Younes Rassim
.
Bradai M.a.
.
Sadeddine A.
.
Mouadji Y.
.
Benabbas A.
.
pages 49-53.
Hamidouche Mohamed
.
Khennafi-benghalem Nafissa
.
pages 33-38.
Benabadji M K
.
Faraoun H I
.
pages 21-25.
Kazi Tani Nabil
.
Nedjar Djamel
.
Tamine Tawfik
.
Hamane Mabrouk
.
pages 249-258.