WEBREVIEW

Study of structural and mechanical properties of tungsten carbides coatings

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 W2C 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.


Document joint


 
| info visites 3364378

Suivre la vie du site fr  Suivre la vie du site Science et Technologie  Suivre la vie du site NATURE & TECHNOLOGIE  Suivre la vie du site Numéro 05   ?

Creative Commons License