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High temperature performance of two-layered ceramics and the implications for Roman crucibles

Gardner, C; Müller, NS; Vekinis, G; Freestone, IC; Kilikoglou, V; (2020) High temperature performance of two-layered ceramics and the implications for Roman crucibles. Archaeometry , 62 (5) pp. 935-951. 10.1111/arcm.12569.

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Abstract

Roman metalworking crucibles are frequently characterised by an extra outer layer (EOL) of clay, applied to a pre‐formed vessel. Three‐point bending and standardised dead‐weight loading tests were conducted to determine the advantages offered by the EOL. Deformation and fracture behaviour, at temperatures up to 1,100°C, of two‐layer, monolithic, and tempered‐monolithic briquettes were compared. Measurements indicate that the two‐layer briquettes are more resistant to fracture at high‐temperatures: above 850°C they show more extensive plastically deformed regions than monolithic briquettes. The influence of temper is consistent with previous results: tempering causes quasi‐stable fracture and reduced fracture strength. Results suggest EOLs assisted in preventing catastrophic failure.

Type: Article
Title: High temperature performance of two-layered ceramics and the implications for Roman crucibles
DOI: 10.1111/arcm.12569
Publisher version: http://dx.doi.org/10.1111/arcm.12569
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions
Keywords: Roman crucibles, multi‐layer ceramics, mechanical properties, high temperature performance
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL SLASH
UCL > Provost and Vice Provost Offices > UCL SLASH > Faculty of S&HS
UCL > Provost and Vice Provost Offices > UCL SLASH > Faculty of S&HS > Institute of Archaeology
UCL > Provost and Vice Provost Offices > UCL SLASH > Faculty of S&HS > Institute of Archaeology > Institute of Archaeology Gordon Square
URI: https://discovery.ucl.ac.uk/id/eprint/10095280
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