Carbon Displacement-Induced Single Carbon Atomic Chain Formation and its Effects on Sliding of SiC Fibers in SiC/graphene/SiC Composite

Joseph B. Wallace; Di Chen; Lin Shao

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Carbon Displacement-Induced Single Carbon Atomic Chain Formation and its Effects on Sliding of SiC Fibers in SiC/graphene/SiC Composite

机译：碳置换诱导的单碳原子链形成及其对SiC /石墨烯/ SiC复合材料中SiC纤维滑动的影响

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Understanding radiation effects on the mechanical properties of SiC composites is important to their application in advanced reactor designs. By means of molecular dynamics simulations, we found that due to strong interface bonding between the graphene layers and SiC, the sliding friction of SiC fibers is largely determined by the frictional behavior between graphene layers. Upon sliding, carbon displacements between graphene layers can act as seed atoms to induce the formation of single carbon atomic chains (SCACs) by pulling carbon atoms from the neighboring graphene planes. The formation, growth, and breaking of SCACs determine the frictional response to irradiation.

机译：了解辐射对SiC复合材料的机械性能的影响对其在先进反应堆设计中的应用至关重要。通过分子动力学模拟，我们发现由于石墨烯层与SiC之间的牢固界面结合，SiC纤维的滑动摩擦很大程度上取决于石墨烯层之间的摩擦行为。滑动时，石墨烯层之间的碳置换可以充当种子原子，通过从相邻的石墨烯平面拉出碳原子来诱导单碳原子链（SCAC）的形成。 SCAC的形成，生长和断裂决定了对辐射的摩擦响应。

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《Materials Research Letters》 |2016年第1期|共7页
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Joseph B. Wallace; Di Chen; Lin Shao;
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Carbon Displacement-Induced Single Carbon Atomic Chain Formation and its Effects on Sliding of SiC Fibers in SiC/graphene/SiC Composite

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