Jéferson Aparecido Moreto
Professor DoutorÁrea de atuação: materiais metálicos.
Grupo de pesquisa (Groupe/Lab): Núcleo de Estudos em Eletroquímica, Superfície e Corrosão – NEESC
E-mail: jamoreto@usp.br
ORCID: https://orcid.org/0000-0001-9837-3216
Currículo Lattes
Possui graduação em Física pela Universidade Estadual do Centro-Oeste (Unicentro), mestrado em Engenharia pela Universidade Federal do Paraná (UFPR), doutorado em Ciência e Engenharia de Materiais pela Universidade de São Paulo (USP) com período sanduíche na Engineering School of Mechanical & Materials Technologies Centre (Minho University – Portugal) e Pós-doutorado em Engenharia de Materiais pelo Instituto de Pesquisas Energéticas e Nucleares (IPEN).
Foi professor visitante do Seneca College of Applied Arts and Technology (Toronto – Canada) e do Instituto Superior Técnico da Universidade de Lisboa (IST-Portugal).
Atuou como professor do Instituto Federal de Educação, Ciência e Tecnologia Goiano (IF Goiano) e da Universidade Federal do Triângulo Mineiro (UFTM) entre os anos de 2013 e 2023.
Atuou como professor permanente no Programa de Pós-graduação em Agroquímica (PPGAq-IFGoiano), Programa de Pós-graduação Multicêntrico em Química de Minas Gerais (PPGMQ-MG-UFTM) e no Programa de Pós-graduação em Ciência e Tecnologia de Materiais (PPGCTM-UFTM).
Atualmente é professor na área de Comportamento Mecânico da Escola de Engenharia de São Carlos (EESC) da Universidade de São Paulo (USP).
Desde o ano de 2015 é Bolsista de Produtividade em Pesquisa (Nível 2) do Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) na área de Engenharia de Materiais e Metalurgia.
É orientador com credenciamento pleno em 02 Programas de Pós-Graduação a nível de mestrado e doutorado.
Tem experiência na área de Engenharia de Materiais e Metalúrgica, com ênfase em Propriedades Mecânicas de Metais e Ligas, atuando principalmente nos seguintes temas: Fadiga de Materiais Metálicos, Propriedades Mecânicas, Tenacidade à Fratura e Processos Sinérgicos de Corrosão-fadiga. Possui experiência em estudos eletroquímicos de materiais metálicos, atuando principalmente nos seguintes temas: Espectroscopia de Impedância Eletroquímica (EIE), Scanning Vibrating Electrode Technique (SVET), Scanning Kelvin Probe (SKP), Scanning Ion-Sensitive Electrode Technique (SIET) e curvas de polarização potenciodinâmica em eletrodos plano e rotatório. Tem experiência em Física da Matéria Condensada, atuando nos seguintes temas: Refinamento Estrutural (Método Rietveld), Difração de raios-X e Nanotecnologia Química.
Possui parcerias internacionais com o Instituto Superior Técnico de Lisboa (IST-Portugal), Universidade do Minho (UM-Portugal), Jain University (Índia) e Bundesanstalt für Materialforschung und-prüfung (BAM-Alemanha). No Brasil, possui parcerias com a Universidade Federal do Rio Grande do Sul (UFRGS), Universidade Estadual de Santa Catarina (UDESC), Universidade Federal do Paraná (UFPR), Universidade Federal Tecnológica do Paraná (UTFPR), Universidade Estadual de Londrina (UEL), Universidade Estadual de Campinas (UNICAMP), Escola Politécnica da USP, Faculdade de Ciências Farmacêuticas da USP-Ribeirão Preto, Escola de Engenharia de São Carlos da USP, Universidade Federal do Triângulo Mineiro (UFTM), Universidade Federal de Uberlândia (UFU), Universidade Federal de Minas Gerais (UFMG), Universidade Federal de São João Del Rei (UFSJ) e Unidade EMBRAPII do Instituto Federal de Educação, Ciência e Tecnologia do Triângulo Mineiro (IFTM).
Atua como Revisor em mais de 30 Periódicos Internacionais com JCR.
Oxidação em Altas Temperaturas
Objetivo: Esta linha de pesquisa tem por objetivo estudar os processos de oxidação em altas temperaturas em meio de H2S na indústria petroquímica..
Grande área: Engenharias
Grande Área: Engenharias / Área: Engenharia de Materiais e Metalúrgica.
Palavras-chave: Oxidação; Indústria Petroquímica; Sulfetação.
Mecânica e Metalurgia da Fratura
Objetivo: Esta linha de pesquisa tem por objetivo o desenvolvimento de metodologias e determinação da vida em nucleação e propagação de materiais utilizados em engenharia, buscando a correlação entre microestrutura e propriedade, considerando o efeito do meio e da temperatura..
Grande área: Engenharias
Grande Área: Engenharias / Área: Engenharia de Materiais e Metalúrgica / Subárea: Metalurgia Física / Especialidade: Propriedades Mecânicas dos Metais e Ligas.
Palavras-chave: Ligas de Alumínio; Vida de nucleação em fadiga; Vida de propagação em fadiga; Meio salino.
Nanotecnologia Química
Objetivo: Esta linha de pesquisa tem por objetivo a obtenção e caracterização de micropartículas e nanopartículas de alginato e quitosana para liberação controlada de herbicidas e quimioterápicos..
Grande área: Ciências Exatas e da Terra
Grande Área: Ciências Exatas e da Terra / Área: Física / Subárea: Física da Matéria Condensada / Especialidade: Estruturas Eletrônicas e Propriedades Elétricas de Superfícies; Interf. e Partículas.
Palavras-chave: Nanotecnologia; Liberação controlada; Drug system delivery.
Corrosão
Objetivo: Esta linha de pesquisa tem por objetivo estudar os processos de corrosão global e localizada em ligas de alumínio de grau aeronáutico..
Grande área: Engenharias
Grande Área: Engenharias / Área: Engenharia de Materiais e Metalúrgica / Subárea: Metalurgia Física / Especialidade: Estrutura dos Metais e Ligas.
Grande Área: Engenharias / Área: Engenharia de Materiais e Metalúrgica / Subárea: Metalurgia Física / Especialidade: Transformação de Fases.
Palavras-chave: corrosao; Ligas de Alumínio; Espectroscopia de Impedância Eletroquímica; SVET; SKP
Ensino de Física
Objetivo: Foundations of Teaching & Learning. Inclusive Teaching & Scholarly Practice. Technology Enhanced Learning. Teaching and Learning with Technology..
Fatigue
Objetivo: Many of the aircraft in service today have exceeded their original design life span and economic consideration have driven the industry towards the retention of older aircraft. Material degradation due to corrosion and fatigue processes are the major factors that contribute to the aging of an aircraft. Corrosion and corrosion fatigue are recognized as significant damage mechanisms to the navy aircraft structures. With extension of operation life, the problem is becoming increasingly important and has received more attention of the aeronautic researchers. Aircraft in flight situations are subject to repeated loads, frequencies and aggressive media. Thus, many structures are expected to endure long lives while exposed to corrosive environments, as well as repetitive loads. The aircraft industry has recently shown renewed interest in the aluminum-lithium (AlLi) alloys, which offer improvements in structural performance through density reduction, increased stiffness, better fracture toughness and higher fatigue crack growth resistance, as well as enhanced corrosion resistance. The corrosion and fatigue properties of aluminum alloys are major issues in the service life assessment of aircraft structures and in the management of aging air fleets. Corrosion Fatigue (CF) phenomena is an important and complex failure mode that may take place in high performance structural metals submitted to repeated loads in an aggressive environment. The understanding of the CF phenomena, the kinetics and micromechanisms of fatigue crack growth under these circumstances, is essential for life prediction and for the development of more resistant alloys. Here, we study the correlation between intrinsic (chemical composition, microstructure) and extrinsic factors (frequency, type of loading, medium, temperature) in the nucleation life and fatigue crack growth of 2xxx and 7xxx series aluminium alloys..
Grande área: Engenharias
Palavras-chave: fatigue; Fatigue Crack Growth; Fatigue-corrosion; Aluminium alloys
Localised Electrochemical Techiniques
Objetivo: The use o localised eletrochemical techniques such as SVET and SIET may help to shed some light on the corrosion mechanisms. In fact, metallic corrosion is associated with anodic oxidation (metal oxidation followed by hydrolysis of the formed cation, with production of H+) and cathodic reduction (water and oxygen reduction with production of OH-). Thus, the combination of SVET (measuring the localised anodic and cathodic currents produced in the corrosion process) and SIET (probing the changes in local pH due to anodic acidification or cathodic alkalinisation) is a powerful tool for the assessment of the nature and evolution of the microgalvanic corrosion process..
Grande área: Engenharias
Palavras-chave: SVET; SIET; Corrosion.
Biomaterials: Dental and Orthopedic Implants
Objetivo: The demand for the development and use of biomaterials, especially orthopedic, traumatological or dental implants has been increasing daily. Among metallic biomaterials, titanium (Ti) and its alloys are given preference to use as orthopedic implants. Ti alloys display good mechanical strength, good resistance to corrosion process in an aggressive medium, low density , relatively low Young´s modulus as well as good biocompatibility. Considering all production of Ti alloy about 50% is related to the Ti-6Al-4V. The Ti-6Al-4V alloy is used as reference material for the development and improving other alloys. Despite the range of attractive properties mentioned above, Ti-6Al-4V alloy exhibits low hardness, poor resistance to wear and corrosion processes in a medium containing fluoride aggressive ion. In fact, when the Ti-6Al-4V alloy is exposed to an aggressive media, the TiO2 thin films produced spontaneously on the alloy surface are broken, leading the material to global and localised corrosion processes. In this sense, considering the most diverse applications of the Ti-6Al-4V alloy, it is crucial to improve its surface properties. Here, surface treatments are used to improve the corrosion resistance of Ti-6Al-4V alloy..
Grande área: Ciências Exatas e da Terra
Palavras-chave: Corrosion resistance; Surface treatments; Biological applications.
Interfaces and Surfaces Engineering
Objetivo: The aim of this topic is to provide a respectful outlet for sound science research on surfaces and interfaces engineering area. This topic line studies coatings engineering, interfaces and thin films, nanostructured materials applied to aircraft industry, nanostructured materials used in biomedical application, modification and functionalization of surfaces, chemical and physical deposition methods, characterization and analysis.
Aluminium Alloys for Airfrafts
Objetivo: The aircraft industry is constantly looking for improved materials, which offer benefits in terms of performance, weight and cost savings. The 2XXX and 7XXX series aluminium alloys are commonly used in aircraft applications where high strength-to-weight ratios are required. The aim of this research topic is to evaluate the effect of localized corrosion mechanisms and corrosion-fatigue crack growth resistance of aluminium alloys used as aircraft materials. For this purpose, electrochemical techniques such as Open Circuit Potential (OCP), Potentiodynamic Polarization Curves (PPc), Electrochemical Impedance Spectroscopy (EIS), Scanning Vibrating Technique (SVET) and pH micro-potentiometry combined with mechanical tests is the specialty of this line..
Aluminium Alloys for Airfrafts
Objetivo: The aircraft industry is constantly looking for improved materials, which offer benefits in terms of performance, weight and cost savings. The 2XXX and 7XXX series aluminium alloys are commonly used in aircraft applications where high strength-to-weight ratios are required. The aim of this research topic is to evaluate the effect of localized corrosion mechanisms and corrosion-fatigue crack growth resistance of aluminium alloys used as aircraft materials. For this purpose, electrochemical techniques such as Open Circuit Potential (OCP), Potentiodynamic Polarization Curves (PPc), Electrochemical Impedance Spectroscopy (EIS), Scanning Vibrating Technique (SVET) and pH micro-potentiometry combined with mechanical tests is the specialty of this line..
Inherently Conductive Polymer Coatings
Objetivo: Intrinsically conductive polymers (ICP) can be useful in corrosion protection as a form of coating onto metals and metal alloys owing to their conductive ability and due to the strict environmental regulations on conventional heavy metals coatings. Thus, the aim of this research topic is to evaluate the effect of ICP coatings on the resistance of corrosion. Thus, the aim of this research line is the development of robust studies on surface treatment using ICPs in order to improve the corrosive properties of materials used in aircraft and biomedical applications..
Electrochemical Caracterization of Supercapacitors
Objetivo: Energy storage systems are a fundamental technological issue for a variety of topics that includes portable energy devices, electric automobiles, renewable environmental energy resources, and energy storage operations. In these systems, the energy-storage capacity, the charge-discharge rate, and the cycling stability are important characteristics to maintaining a device operating safely and efficiently in different scenarios and operating states. However, many new applications require not only high energy and power densities but device-oriented characteristics such as mechanical flexibility and tunable dimensions, demanding the development of new hybrid materials, production methods, and design techniques. Here, we develop pure and applied research of hybrid materials to be used as supercapacitors..
Palavras-chave: electrochemical; Supercapacitors; Energy storage systems.
Nanotechnology Applied to Agriculture
Objetivo: Agriculture uses large quantities of plant protection products to reduce productivity losses caused by biotic agents. Among the phytosanitary products regularly used in agriculture are herbicides, also known as agricultural pesticides. The agricultural pesticides presently employed in agriculture have different physicochemical properties, which give them different degrees of environmental persistence, mobility and toxicity potential. Studies on the encapsulation of herbicide molecules in microparticles, using biodegradable polymers aimed at their controlled release, have been the subject of research in recent years. The encapsulation may be established as a process for confining active compounds within a particulate matrix, to achieve one or more desirable effects. The particles can be used for immobilization, protection or stabilization, controlled release of the entrapped molecules, and for alteration of the characteristics of the active principle. Sodium alginate (Na-ALG) has been widely used in the encapsulation of compounds, by protecting the encapsulated compounds from adverse factors such as temperature, humidity and pH, improving stability and bioavailability. Here, we use biodegradable polymers for herbicide encapsulation..
Palavras-chave: Agriculture; Nanotechnology; Biodegradable polymers.