To prevent the carbon/carbon (C/C) composites from ablation, a new type of ablation protective coating was prepared on the surface of the C/C composites by a step pack cementation technique. X-ray diffraction (XRD) and scanning electron microscopy (SEM) analysis show, the coatings obtained by...

The initial stage of Au adsorption on the Si(111)-7 × 7 surface has been investigated by the first-principles calculations. Different configurations have been considered and the high coordination sites were determined as the most possible places for the Au adsorption. The diffusion barriers for...