Instituto Politécnico de Viana do Castelo

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Universidade Europeia

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Início / Engenharia Mecânica / docente

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João Carlos de Castro Abrantes

Resumo biográfico

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Contacto(s)

ORCID

0000-0003-4595-3641

Ciência ID

Área Cientifica / Grupo Disciplinar

Ciências da Engenharia e Tecnologias

Cargo

Professor Coordenador c/ agregação

Publicações

Design and Performance analysis of a High Field Side antenna for Plasma Position Reflectometry control on DTT

Santos J.M., Silva A., da Silva F., Nietiadi Y., Luís R., Ferreira J., De Masi G., et al. (2024) Design and Performance analysis of a High Field Side antenna for Plasma Position Reflectometry control on DTT. Fusion Engineering and Design

The Use of Asbestos and Its Consequences: An Assessment of Environmental Impacts and Public Health Risks

António Curado., Leonel J. R. Nunes, Arlete Carvalho., João Abrantes., Eduarda Lima., Mário Tomé. (2024) The Use of Asbestos and Its Consequences: An Assessment of Environmental Impacts and Public Health Risks. Fibers

The use of asbestos, once celebrated for its versatility and fire-resistant properties, has left a lasting legacy of environmental degradation and public health risks. This paper provides a comprehensive assessment of the environmental impacts and health risks associated with asbestos, highlighting its widespread use, environmental persistence, and adverse effects on human health. Through a literature review, this study examines the historical context of asbestos use, its adverse environmental effects and the mechanisms by which exposure to asbestos poses significant health risks, including the development of asbestos-related diseases such as mesothelioma, lung cancer, asbestosis, etc. It also assesses the current regulatory framework and provides a methodological analysis of the strategy for recycling end-of-life materials containing asbestos fibers, proposing the inclusion of asbestos-containing materials (ACMs) in the rock wool industry to reduce Greenhouse Gasses (GHG) emissions. Drawing on interdisciplinary insights from environmental science, public health, and regulatory analysis, this paper concludes with recommendations for improving asbestos management strategies, promoting safer alternatives and mitigating the long-term environmental and human health impacts of asbestos.

Characterization and processing of kaolin from southern Brazil for potential strategic application in the porcelain stoneware tiles manufacturing

André Biava Comin., Alexandre Zaccaron., Emily Saviatto., Juliana Acordi., Fabiano Raupp-Pereira., João Carlos de Castro Abrantes., Manuel Joaquim Ribeiro., Guilherme Silva de Souza. (2024) Characterization and processing of kaolin from southern Brazil for potential strategic application in the porcelain stoneware tiles manufacturing. Journal of South American Earth Sciences

Effect of yttrium ion on the space charge potential across grain boundaries regions of gadolinia-doped ceria electrolytes

Gomes E., Ramasamy D., Ferreira A.A.L., Abrantes J.C.C. (2024) Effect of yttrium ion on the space charge potential across grain boundaries regions of gadolinia-doped ceria electrolytes. Solid State Ionics

Defect chemistry of pyrochlore Pr2O3-ZrO2 system: the relevant thermodynamic parameters

J. C. C. Abrantes, E. Gomes., A. V. Shlyakhtina (2024) Defect chemistry of pyrochlore Pr2O3-ZrO2 system: the relevant thermodynamic parameters. Journal of Solid State Electrochemistry

AbstractMaterials of the system Pr2O3-ZrO2, namely the Pr2Zr2O7-based pyrochlores, have received considerable attention in the last decade, being a very interesting structure for defect chemistry because of its high solubility for various dopants, anti-site behaviour between A and B, and the multitude of possible combinations of A and B that are compatible in this type of structure. The compositions (Pr2-xZrx)Zr2O7+x/2 (x = 0.15), Pr2Zr2O7, and Pr2(Zr2-xPrx)O7-x/2 (x = 0.1), were prepared in previous works through the coprecipitation method and were characterised by impedance spectroscopy as a function of the oxygen partial pressure. In the present work, a defect chemistry model is proposed, and, based on the previously obtained experimental conductivity data, the relevant thermodynamic parameters were obtained by fitting, using a non-linear optimisation numerical method. The mobility of oxygen vacancies and interstitials oxygen were accurately determined, as well as the equilibrium constant of the formation of anti-Frenkel defects. It was observed that deviations from the stoichiometry promote an increase in ionic conductivity, respectively, 1.3x10-4, 1.4x10-3 and 1.7x10-2 S/cm, for the stoichiometric, excess of Pr and excess of Zr composition. The higher value obtained for the composition with an excess of Zr4+, suggests a higher interstitial oxygen mobility when compared with the oxygen vacancy mobility. It is also demonstrated that the novel applied methodology of fitting conductivity experimental data with an optimisation numerical method is suitable for determining the thermodynamically relevant parameters of defect chemistry models, allowing the prediction of material properties.

Structural analysis of selective laser melted copper-tin alloy

Rahmani R., Resende P.R., Couto R., Lopes S.I., Kumar R., Maurya H.S., Karimi J., et al. (2024) Structural analysis of selective laser melted copper-tin alloy. Journal of Alloys and Metallurgical Systems

Overview of Selective Laser Melting for Industry 5.0: Toward Customizable, Sustainable, and Human-Centric Technologies

Ramin Rahmani., Javad Karimi., Pedro Miguel Rebelo Resende., JCC Abrantes., Sérgio Ivan Lopes. (2023) Overview of Selective Laser Melting for Industry 5.0: Toward Customizable, Sustainable, and Human-Centric Technologies. Machines

Industry 5.0 combines automation/digitalization with human capabilities to create a more intuitive, interactive, and sustainable working environment. Additive manufacturing, widely known as 3D printing, is a key technology used to increase customization and efficiency and reduce waste in manufacturing. Industry 5.0 enables manufacturers to create environmentally sustainable and consumer-centric products. However, there is a lack of studies on the introduction of AM technologies to Industry 5.0. The present study investigates the use of additive manufacturing for the fabrication of metallic parts/assemblies and the correlation between human-centric technologies, additive manufacturing, and environmental sustainability. Effective communication between these components is the key to achieving the goals of Industry 5.0, and the important parameters are shown in this article. The present work is focused on an overview and the impact of the futuristic subdivision of additive manufacturing applied to the fabrication of metallic parts/assemblies, more specifically, the 3D printing of challenging alloys or composites (such as copper alloys and/or composites with hard particles).

pH-Dependent Synthesis of Pure-Phase BiI₃ and BiOI by Electrodeposition**

G. Mohan Kumar., Deepak Suresh Varma., Sathiskumar Jothi., Devaraj Ramasamy., João C. C. Abrantes, Murali Rangarajan. (2023) pH-Dependent Synthesis of Pure-Phase BiI₃ and BiOI by Electrodeposition**. ChemistrySelect

Additive Manufacturing Integrated Technologies Applied to Human Machine Interfaces: An Industry 5.0 Overview

Rahmani R., Karimi J., Davoodi F., Abrantes J.C.C., Resende P.R., Lopes S.I. (2023) Additive Manufacturing Integrated Technologies Applied to Human Machine Interfaces: An Industry 5.0 Overview. Euro PM2023 Proceedings

The industry 5.0 revolution prioritizes digital transformation and automation, while also focusing on improving human-machine interface (HMI), improving production and reducing work-related injuries. On the other hand, to tackle the challenge of designing lightweight and complicated structures, new high-tech materials have been developed using combined additive manufacturing (AM) and powder metallurgy (PM) techniques. The futuristic subsections of additive manufacturing (AM) produce composite materials that incorporate both metallic and ceramic components, suitable for a range of applications from art to industrial use. This brief overview examines the key features of the fifth industrial revolution, with particular attention to the selective laser melting (SLM) process. Two specific areas of study include the exploration of an antiviral metal-ceramic composite and also reflective metal fabrication using integrated AM-PM technologies.

Hydration and phase development of recycled cement

José Alexandre Bogas., Sofia Real., Ana Carriço., J.C.C. Abrantes., Mafalda Guedes. (2022) Hydration and phase development of recycled cement. Cement and Concrete Composites

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Projetos

Regeneração de materiais em pilhas de combustível de óxido sólido

As inclusões purificantes conterão o aditivo de limpeza com afinidade para sílica e baixa solubilidade no eletrólito sólido, para evitar efeitos prejudiciais na condutividade de interior de grão. Serão usados critérios de seleção com base em análise termodinâmica.Verificar-se-á a aplicabilidade dos critérios de seleção de aditivos com validação experimental. A incorporação dos aditivos será efetuada por misturas de pós do eletrólito com aditivo de purificação ou com uma fase secundária que contenha o aditivo e seja compatível com o eletrólito. Será usada espectroscopia de impedância para separar contribuições microestruturais, e avaliar os efeitos das inclusões de purificação nas condutividades de interior e fronteiras de grão.Serão desenhados materiais com composição heterogénea. O conceito base será do tipo núcleo-invólucro, com núcleo de CGO e invólucro rico em lantanídio. O processamento basear-se-á em misturas de pós de CGO (núcleo) com precursores do invólucro em solução líquida, antes da sinterização, ou por impregnação de amostras de CGO porosas. Os resultados serão confrontados com caracterização por espectroscopia de impedâncias e outras técnicas eletroquímicas para avaliar efeitos das heterogeneidades nas propriedades de transporte.Um terceiro conceito é baseado na reparação eletroquímica in-situ de materiais com propriedades dependentes de condições redox. Os materiais modelo serão:Sr(Ti,Nb)O3 para demonstrar a capacidade de recuperação da sua elevada condutividade, por inversão da polarização;Ânodos baseados em (Sr,La)VO3, que serão usados para demonstrar que a inversão catódica pode reverter a degradação estrutural.Outro conceito visa auto-reparação de defeitos de processamento ou fissuras no eletrólito fino, despoletada pelas fugas, provocando alterações redox em iões Mn ou de outros elementos de valência variável, induzindo decréscimo de solubilidade e selagem por precipitação de fases secundárias e outras alterações estruturais.

Serviço WindPlus

AOWINDE- Atlantic Offshore Wind Energy

Criação de um roteiro transfronteiriço de indústria eólica marinhas. e de um Observatório transfronteiriço de "Tecnologias Emergentes" em energia eólica offshore que permita a identificação de agentes e capacidades de I+D+i na região Galiza-Norte de Portugal. Mapa de capacidades tecnológicas. Apoio à Indústria de Energia Eólica Offshore da Eurorregião Fazer campanhas de sensibilização e valorização da contribuição para a sustentabilidade deste tipo de energia renovável bem como da sua capacidade de atrair investimento inovador e emprego de qualidade

João Carlos de Castro Abrantes

Professor Coordenador c/ agregação

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