Relationship between wettability of ceramics by liquid metal and surface obserbation of ceramics with acomic scale

通过座滴法和金刚石的表面观察来测量金刚石与液体金属的润湿性，并且通过原子力显微镜来测量作用在金刚石表面上的原子间力。研究结果如下：1.液态金属对金刚石的润湿性取决于其表面取向。其表面取向依赖性在高温下比在低温下更显著.金刚石表面结构的变化对金刚石的润湿性有显著影响.液态金属对金刚石的润湿性与原子力显微镜测得的原子间相互作用力有关.液态纯锡对金刚石润湿性的温度依赖性表现出特征行为。液态锡在金刚石表面的接触角保持在150-160 °。在较低的温度下，然后突然降低到70 ℃。在1100 K下，并回复到110-120 °。在1650 K时，接触角再次增大到130- 130 K，这可以用金刚石表面结构随温度的变化来解释。

The wettability of diamond by liquid metal was measured by the sessile drop method and surface observation of diamond and an interatomic force acting at the diamond surface was measured by an atomic force microscope. The results can be summarized as follows ;1. The wettability of diamond by liquid metal depends on is surface orientation. Its surface orientation dependence at high temperature is more significant than at low temperature.2. The wettability of diamond is significatly affected by surfce structure change of diamond.3. The wettability of diamond by liquid pure metal relates to interatomic force measured by the atomic force microscope.4. Temperature dependence of the wettability of diamond by liquid pure Sn shows characteristic behavior. The contact angle of liquid Sn on diamond maintains high value, 150-160 deg. at lower temperature, then suddenly decreases to 70 deg. at 1100K, and recvers to 110-120 deg.. At 1650K, the contact angle increases again to 130-130K.The behavior can be explained by surface structure change of diamond with temperature.