Carbide formation in tungsten coatings on carbon-fibre reinforced carbon substrates

► Thin Mo/W layers system on carbon-fibre reinforced carbon divertor tile ► Heat treatment at 1470 K results in two tungsten carbide creation - W2C and WC ► The total tungsten carbide creation is limited by carbon diffusion ► WC carbide creation is limited by W2C-WC reaction rate