The compression strength of thermoexfoliated graphite (TEG) is investigated in the compacted samples of various densities (from 1 to 2 g/cm~3) at the temperature 293K and 673K. The density dependence of strength shows a maximum, which has the position and magnitude dependent on temperature. The compression strength of compacted TEG is found to be decreased at heating to 673K and fallen sharply as the density is increased from 1.9 to 2.1g/cm~3. The model is proposed to describe the mechanism of TEG sample fracture. According to this model, the fracture of TEG samples occurs due to the increase of intrinsic pressure in closed voids under the application of external load and at increased temperature.
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机译：在温度为293K和673K的各种密度（从1到2 g / cm〜3）的压实样品中研究了热剥离石墨（TEG）的抗压强度。强度的密度依赖性显示最大值，其位置和大小取决于温度。发现压实的TEG的压缩强度在加热至673K时降低，并且随着密度从1.9增加至2.1g / cm〜3而急剧下降。提出该模型来描述TEG样品断裂的机理。根据该模型，TEG样品的断裂是由于施加外部载荷和温度升高时封闭空隙中的固有压力增加而发生的。
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