Application of carbon-tungsten, carbon-beryllium and carbon-aluminium nanostructures in divertors coatings from fusion reactor

Carbon fiber composites (CFCs) are currently used in current ITER design. The strike point zone area is covered by tungsten based CFCs tiles. Beryllium based CFCs are use in other parts of divertor region. Those materials are a compromise based on experience with individual materials in many different tokamaks. Also aluminum CFCs can be a candidate material for the First Wall in ITER. We see that TVA method is suitable for the synthesis of wide range of materials, and more important is a low cost method that allow variation of concentration in one shot deposition. We compare CFCs nanostructures (Al, Be, W) by modeling and simulated TEM images, and also by evaluate the response of generated structure under ions bombardements. TEM comparative studies show that Al and Be CFCs contrast of images are verry closed to each other. Better contrast are obtain for W-CFCs. Ion bombardments shows same conclusion, Al and Be exibits the same behavior under ions bombardments. We estimate the energy limit of deflects apparition from stoping range versus energy graphics. The energy of defects apparition are close for Be and Al, between 500-1000ev and larger than 1000eV for W-CFCs. The Michelson contrast evaluated from TEM images show a similar value for Al and Be, but increased for W-CFCs.