Archaeometallurgical study of artefacts from Castro de Vila Nova de São Pedro (Azambuja, Portugal)

Detalhes bibliográficos
Autor(a) principal: Pereira, Filipa Isabel Peralta da Silva
Data de Publicação: 2011
Tipo de documento: Dissertação
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10362/6220
Resumo: Dissertação para obtenção do Grau de Mestre em Conservação e Restauro
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spelling Archaeometallurgical study of artefacts from Castro de Vila Nova de São Pedro (Azambuja, Portugal)ArchaeometallurgyChalcolithicCopperArsenicDissertação para obtenção do Grau de Mestre em Conservação e RestauroThe Castro de Vila Nova de São Pedro (VNSP) is a settlement located at Azambuja, district of Lisbon, occupied during the third and second millennia BC, predominantly during the Chalcolithic period. A diversified collection of 275 copper-based artefacts (complete or in a fragmented condition) belonging to VNSP was studied for this thesis using non-destructive and micro-destructive analytical techniques. The classification of the objects according to its main chemical elements was performed by using EDXRF spectrometry. A selection of 53 of these artefacts was analysed by micro-EDXRF spectrometry to quantify the alloy compositions. The microstructural characterisation of the metal alloys, as well as the identification of the thermomechanical processes applied to the shaping of the artefacts was accomplished through optical microscopy, supported by SEM-EDS and supplemented by Vickers micro-hardness measures to establish the actual effectiveness of the thermomechanical processes in the hardness of the artefact. Results show that the initial collection is mainly composed of copper and arsenical copper. In the subset of 53 artefacts, 38% were considered copper alloyed with arsenic (As>2%). A statistically significant association was found between copper alloys with arsenic contents over 2% and artefacts identified as weapons. This could point out as the addition of arsenic in order to increase the weapon’s mechanical strength. The determination of the “chaîne opératoire” by microstructural analysis show that the majority of this subset (73%) was finished with forging plus annealing operations cycles and 23% of the artefacts received final cold hammering. In several cases, the presence of arsenic rich phases in the microstructure shows no evidence of controlling cooling rates during the casting operation. No direct correlation was found between the arsenic content of the alloy and its hardness, assessed by Vickers microhardness testing. Nevertheless, proof was found of a higher hardness near the blade regions of the artefacts.Fundação da Faculdade de Ciências e Tecnologia,project METALURGIA PRIMITIVA NO TERRITÓRIO PORTUGUÊS - PTDC/HIS-ARQ/110442/2008Faculdade de Ciências e TecnologiaSilva, RuiAraújo, Maria de FátimaSoares, AntónioRUNPereira, Filipa Isabel Peralta da Silva2011-11-10T12:11:14Z20112011-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://hdl.handle.net/10362/6220enginfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-03-11T03:37:20Zoai:run.unl.pt:10362/6220Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T03:16:46.747568Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Archaeometallurgical study of artefacts from Castro de Vila Nova de São Pedro (Azambuja, Portugal)
title Archaeometallurgical study of artefacts from Castro de Vila Nova de São Pedro (Azambuja, Portugal)
spellingShingle Archaeometallurgical study of artefacts from Castro de Vila Nova de São Pedro (Azambuja, Portugal)
Pereira, Filipa Isabel Peralta da Silva
Archaeometallurgy
Chalcolithic
Copper
Arsenic
title_short Archaeometallurgical study of artefacts from Castro de Vila Nova de São Pedro (Azambuja, Portugal)
title_full Archaeometallurgical study of artefacts from Castro de Vila Nova de São Pedro (Azambuja, Portugal)
title_fullStr Archaeometallurgical study of artefacts from Castro de Vila Nova de São Pedro (Azambuja, Portugal)
title_full_unstemmed Archaeometallurgical study of artefacts from Castro de Vila Nova de São Pedro (Azambuja, Portugal)
title_sort Archaeometallurgical study of artefacts from Castro de Vila Nova de São Pedro (Azambuja, Portugal)
author Pereira, Filipa Isabel Peralta da Silva
author_facet Pereira, Filipa Isabel Peralta da Silva
author_role author
dc.contributor.none.fl_str_mv Silva, Rui
Araújo, Maria de Fátima
Soares, António
RUN
dc.contributor.author.fl_str_mv Pereira, Filipa Isabel Peralta da Silva
dc.subject.por.fl_str_mv Archaeometallurgy
Chalcolithic
Copper
Arsenic
topic Archaeometallurgy
Chalcolithic
Copper
Arsenic
description Dissertação para obtenção do Grau de Mestre em Conservação e Restauro
publishDate 2011
dc.date.none.fl_str_mv 2011-11-10T12:11:14Z
2011
2011-01-01T00:00:00Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10362/6220
url http://hdl.handle.net/10362/6220
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Faculdade de Ciências e Tecnologia
publisher.none.fl_str_mv Faculdade de Ciências e Tecnologia
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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