The phase transition of fullerene C₆₀ under high pressure and high temperature has been widely studied, but the research on the spark‐plasma sintering of C₆₀ is limited, and the mechanical properties of synthesized materials are still unknown. In this study, a series of amorphous carbon materials were synthesized by spark‐plasma sintering fullerene C₆₀ at different temperatures. The structural characterizations showed that they were composed of multi‐graphene fragments with different sizes, curvatures, and ordering degrees. The densities of the synthesized amorphous carbons were 1.3‐1.4 g/cm³, which were lower than the values for graphite, but the mechanical properties were excellent. The highest compressive strength, indentation hardness, and elastic recovery of the amorphous carbons synthesized at different temperatures could reach up to ~1.25 GPa, ~3.8 GPa, and ~85.5%, respectively, which are far better than the values for commercial isotropic graphite materials.

中文翻译：

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通过等离子烧结C60制备的强无定形碳

富勒烯C ₆₀在高压和高温下的相变已经得到了广泛的研究，但是对C ₆₀的火花等离子体烧结的研究有限，合成材料的力学性能仍然未知。在本研究中，通过火花等离子体烧结富勒烯C ₆₀在不同温度下合成了一系列非晶碳材料。结构表征表明它们由具有不同大小，曲率和有序度的多石墨烯片段组成。合成的无定形碳的密度为1.3-1.4 g / cm ³低于石墨的值，但机械性能优异。在不同温度下合成的无定形碳的最高抗压强度，压痕硬度和弹性回复率分别可以达到约1.25 GPa，约3.8 GPa和约85.5％，这远好于商用各向同性石墨材料的值。 。