Article ID Journal Published Year Pages File Type
1417397 Carbon 2006 8 Pages PDF
Abstract

The thermal expansion coefficient (CTE) of Gilsocarbon graphite samples has been measured using strain gauges whilst the samples were subject to either tensile or compressive static loading. Compressive loading increased the CTE from ∼5.4 × 10−6 K−1 to ∼8 × 10−6 K−1 for a compressive load of −50 MPa, whilst tensile loading decreased the CTE to ∼4 × 10−6 K−1 for a tensile load of 12 MPa. There was also found to be corresponding changes to CTE perpendicular to the loading direction. Independent measurements on other samples using clip gauge extensometers were shown to support the strain gauge results. It is considered that the mechanism for this behaviour is related to closure of micro-cracks under load.

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Physical Sciences and Engineering Energy Energy (General)
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