Due to the high strain of ε c = 0.61, the work W = σ c 0 ε c done by the plastic deformation of graphite, which is necessary to pop material out of the channel, is quite significant (σ c 0 is the critical stress needed to activate mechanisms of plastic deformation of the graphite).
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Covalent Diamond-Graphite Bonding: Mechanism of Catalytic Transformation.
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