Abstract
Diamond films were synthesized on a Mo substrate using combustion flame. During cooling process, the most diamond films delaminated between the diamond film and the Mo substrate. It was caused by the thermal stresses due to a mismatch of thermal expansion between the diamond film and Mo substrate. In the previous study, a three-step synthesis method was proposed. According to the results, the delamination could be prevented to some extent, but it was not able to protect completely. Scratching treatments on the surface of the substrate and distances from inner cone to the surface of the substrate were remarked as influence factors of the delamination. Experiments were performed with changed parameters of its influence factors, and effects of influence for the delamination were discussed from experimental results. Optimal conditions of diamond film synthesized using combustion flame were discussed in terms of prevention of the delamination.
