10 documents found, page 1 of 1
Manufacturing and characterisation of a piezoresistive strain sensor based on t...
Gonçalves Ferreira, Rodrigo; Pereira Silva, A; Nunes-Pereira, JoãoDue to an ever-increasing amount of population focusing more on their personal health, thanks to rising living standards, there is a pressing need to improve personal healthcare devices. These devices presently require laborious, time-consuming, and convoluted procedures that heavily rely on cumbersome equipment, causing discomfort and pain for the patients during invasive methods such as sample-gathering, bloo...
Multifunctional Ceramics for Aeronautical and Aerospace Applications
Shvydyuk, Kateryna; Nunes-Pereira, João; Rodrigues, Frederico; Pascoa, Jose; Lanceros-Mendez, Senentxu; Pereira Silva, AIn the areas of aeronautics and aerospace, ceramic composites play an essential and increasing role due to their superior performance and tailorable properties, exhibiting highly specialized mechanical, thermal, and electric features1. Their main applications include thermal protection systems (TPS), thermal barrier coatings (TBC), and dielectric barrier discharge (DBD) plasma actuators, both for instrumentatio...
Attribution of somatosensory properties to an upper limb prosthesis
Fonseca, Gonçalo; Nunes-Pereira, João; Pereira Silva, AThe nervous system is a complex network composed by cells, tissue, and organs that have the ability of receiving, transmit, regulate, and send information and stimuli, not only within our body but from our surroundings1. This information is produced by a complex system of neurochemical and electrical reactions that produce the perceptions of heat, smell, taste, proprioception, and touch that lead to physical re...
CFRP laminates enhanced with graphene nanoparticles in multifunctional applicat...
Parente, J.M.; Carvalho, Ana; Nunes-Pereira, João; Reis, Paulo; Pereira Silva, AIn automobile, aeronautical, aerospace, sports and energy fields, there has been an increase of the use of carbon fibre reinforced polymers (CFRP) due their considerable advantages, such as, low weight, static and fatigue strength as well as corrosion resistance1. The addition of nanoparticles, in particular carbon allotropes, like graphene nanoplatelets (GNP) or carbon nanotubes (CNT) allow not only enhanced m...
Dielectric barrier discharge plasma actuators based on thermosetting composites...
Nunes-Pereira, João; Rodrigues, Frederico; Abdollahzadehsangroudi, Mohammadmahdi; Santos, Paulo Sérgio Pina dos; Silva, Marco; Pereira Silva, AThe massive use of fibre reinforced plastics (FRP) in several industrial sectors such as aeronautics, aerospace, or wind turbines, raises serious environmental concerns with respect to the end-of-life of these structures, based on their poor recyclability. The low density of FRP gives it outstanding specific properties, such as strength and stiffness, when compared to materials with high recyclability rates, su...
Modelling of elastic modulus of CaZrO3-MgO composites using isotropic elastic a...
Nunes-Pereira, João; Carneiro, Pedro; Maceiras, Alberto; Baudin, Carmen; Pereira Silva, AStarting from synthetic raw materials (CaZrO3 and MgO), microstructural and mechanical properties were optimised in order to obtain dense multiphasic ceramic, then finite element method (FEM) of an equimolar (1:1) CaZrO3-MgO composite was performed in order to obtain the effective elastic modulus. Composite presents two main phases of orthorhombic CaZrO3 (81.5 wt.%) and cubic MgO (18.5 wt.%); For 1500 °C, relat...
Advanced CaZrO3-MgO Ceramic Compositions for High Responsability Applications
Nunes-Pereira, João; Pereira Silva, A; Pena, Pilar; Baudin, CarmenThe development of new advanced materials for harsh environment operation conditions, such as high temperature, wear and severe erosion and corrosion, is of growing interest, namely for transport and energy industries, due to the ecological and energetic current concerns on a global scale. Particularly, in aerospace industry the increase of working temperature of engines and turbines combined with weight reduct...
Design and Thermal Conductivity Characterization of a Functionally Gradient Cer...
Babo, Débora Rafaela Telha de; Nunes-Pereira, João; Pereira Silva, A; Pena, Pilar; Baudin, CarmenSpace exploration involves the use of state-of-the-art technologies such as satellite production, propulsion systems, avionics, aerodynamics, research and development of materials, etc. In the particular case of human spaceflight, the insulation system of the spacecraft is also required in order to ensure crew safety in re-entry of the atmosphere and, if possible, the spacecraft re-use. In the case, where the s...
Characterization of a Functionally Gradient Ceramic Based on CaZrO3 – MgO
Babo, Débora Rafaela Telha de; Nunes-Pereira, João; Silva, Pedro D.; Pena, Pilar; Baudin, Carmen; Pereira Silva, AIn the case, where the structure is exposed to severe conditions of operation, such as high strength, wear and high-temperature gradients (e.g. engine components, insulation system, thermal barrier and thermal shield) must be applied. In this work, it was developed and characterized a functional gradient ceramic coating. A ceramic composite based in CaZrO3 – MgO was used in order to design a material with succe...
Development and characterization of ceramic composites based on CaZrO3-MgO
Nunes-Pereira, João; Pena, Pilar; Baudin, Carmen; Pereira Silva, AAdvanced materials for severe environment conditions, such as high temperature, wear and high erosion and corrosion, are of growing interest, namely for transport and energy industries. Particularly, in aerospace industry the increase of working temperature of engines and turbines combined with weight reduction will give rise to higher thrust and lower fuel consumption and consequently less emissions. In this s...