Atmosphere-Induced Effect in Microhardness, Dislocation Mobility and Plasticity of C60and Graphite Crystals

6533b7d2fe1ef96bd125f36b

RESEARCH PRODUCT

Atmosphere-Induced Effect in Microhardness, Dislocation Mobility and Plasticity of C60and Graphite Crystals

I. Manika Janis Maniks J. Kalnacs

subject

Crystallography Brittleness Fullerene Molecular solid Materials science General Chemical Engineering Bilayer Indentation Graphite Dislocation Composite material Indentation hardness

description

Abstract Formation of hard, brittle and toluene-insoluble near-surface layer (∼0.3 μm) of C60 crystals under atmospheric exposure was observed. Similar atmosphere-induced effect was found for graphite crystals and might also be expected for other molecular solids. Data on ageing kinetics of C60 and graphite crystals are presented. Variation of hardness with indentation depth can be described by the microhardness model for bilayer medium with different mechanical properties. Specific feature of C60 and graphite crystals is that no size effect appears in the intrinsic microhardness and dislocation mobility characteristics in the indentation depth range of 0.6–4μm.

year	journal	country	edition	language
1997-01-01	Fullerene Science and Technology

https://doi.org/10.1080/15363839708011979

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