SEM images of the diamond layer of the sample show that there is an extensive intergrowth between diamond grains, which is one of the characteristics PDC synthesized by the growing technique.

• 对样品进行扫描电镜观察，表明PDC金刚石层存在广泛的金刚石颗粒之间的交互生长，这是生长法合成的PDC的结构特徵之一。