Abstract

The composite materials (CM) based on Co, Ti-Cu, and Pt and reinforced with diamond-like carbon particles and diamonds with different component ratios have been obtained by high-pressure high-temperature synthesis (5–9 GPa, 800–1800 °C). The methods of optical microscopy, dynamic indentation, and tribological tests were used to establish the correlation between the structure and properties of the reinforcing phase and CM and to define the limits of the applicability of the CM as tribotechnical materials. Low friction coefficients (0.08–0.06) were demonstrated by the CM reinforced with a superhard (35–40 GPa) diamond-like phase obtained from ball-milled fullerites with a cobalt binder as well as by the CM with diamonds regardless of the binder type and particle size. The wear resistance of the cobalt-based CM increases with increasing hardness of the reinforcing diamond-like particles. The condition for obtaining super wear-resistant CM from metal-fullerene mixtures is the synthesis at a temperature of about 800 °C, which ensures the collapse of fullerene molecules, but limits the graphitization of the diamond-like structure.

摘要

通过高压高温合成（5-9 GPa, 800-1800 ℃）。光学显微镜、动态压痕和摩擦学测试的方法用于建立增强相和 CM 的结构和性能之间的相关性，并确定 CM 作为摩擦技术材料的适用范围。低摩擦系数 (0.08–0.06) 由超硬 (35–40 GPa) 类金刚石相增强的 CM 证明，该相由球磨富勒体和钴粘合剂以及由金刚石与金刚石（无论粘合剂类型）获得和粒径。钴基 CM 的耐磨性随着增强类金刚石颗粒的硬度增加而增加。从金属-富勒烯混合物中获得超耐磨CM的条件是在800℃左右的温度下合成，保证了富勒烯分子的塌缩，但限制了类金刚石结构的石墨化。