Preparation and characterization of diamond single crystal with native rough surface

Single crystal diamond with rough surface is obtained by adding a new type of catalyst, optimizing composition of the catalyst, adjusting reduction process, optimizing the temperature and pressure conditions in the synthetic procedure. The regulation of crystal color and surface morphology are realized. The results of scanning electron microscope (SEM) and atomic force microscope (AFM) show that there are regular wavy patterns on the surface of the crystal. Raman spectra indicates that the carbon atoms in the diamond crystal surface are in sp³ hybridization state. The test results of impact resistance and thermal impact resistance illustrate that the native roughened diamond has better thermal stability than the ordinary diamond does. In addition, the native roughened diamond has lower magnetic susceptibility and impurities in the crystal. The sawing test shows that the small diameter saw blade made of native surface roughened diamond has better sharpness and wear resistance.