Carlos Roberto Camello Lima

Mackenzie Presbyterian University | Mackenzie · Escola de Engenharia (EE)

Ceramic detachments in cladding systems are indicative of adhesion loss between the ceramic tiles and the substrate or its adhesive mortar due to inadequate quality workmanship, the quality of the adhesive mortar or that of the ceramic material, whether acting simultaneously or not. The shear stresses resulting from the ceramic tiles’ expansion due...

The main objective of the research was to identify factors related to the usage of the Internet service of readings, assessed by Brazilian readers and evaluate the intended use of readers based on the factors we have found. The methodological procedures involved conducted an online survey research, with the formation of a database formed by the Bra...

Materials with enhanced wear resistance are constantly in high demand. Nickel-based self-fluxing materials deposited by atmospheric plasma spraying (APS) have feasible wear resistance performance. This study aimed to evaluate the results of a nickel-based self-fluxing alloy coating deposited on AISI 4340 steel substrate using APS. Additionally, the...

Aims: The training and development of people is essential for the companies that want to adopt the Circular Economy, but little has been objectively discussed in the literature on the subject, leaving several gaps for research. Then, the main goal of this study is to identify the people management practices organizations must adopt for the circular...

Aluminum matrix reinforced with carbide powders is considered one of the best ways to improve abrasion resistance in pure alloys. Thus, this study aims to evaluate the abrasive wear resistance of A380 aluminum alloy reinforced with different amounts of NbC reinforcement. The A380 aluminum alloy was selected as the matrix and melted at a temperature...

Thermal barrier coatings have provided a revolution in the industry as they allow a higher operating temperature of equipment, improving the efficiency of gas turbines. However, one of the biggest challenges in terms of increasing the lifespan of TBC systems is the attack of fused silicates or simply CMAS (Calcium-Magnesium-Alumina-Silicate). CMAS...

This article compares the creep testing behavior of AISI 4340 high-strength steel in the as-received and coated conditions. The coating material used is a NiCrBSi self-fluxing alloy. The microstructural characterization was carried out using optical and scanning electron microscopy. The creep tests were conducted at a temperature of 550 • C and wit...

Purpose Construction industry (CI) has great prominence for the world economy, and it is expected that, with the use of the innovative technologies and approaches of Industry 4.0 (I4.0), the new industrial paradigm, construction can reach higher levels of productivity. This study aims to develop a model (readiness model) to assess the level of use...

Abrasive wear behavior of high-pressure high-velocity oxygen fuel (HP-HVOF) and wire arc spray (WAS) iron-based coatings were compared. Microstructural analysis of the coatings was carried out by scanning electron microscopy and energy dispersive spectroscopy. X-ray diffraction was also used to characterize the microstructures of the coatings. A PA...

A fundição de peças com cavidades requer moldes e machos. Para a fabricação dos machos, diversos processos podem ser aplicados. Este trabalho objetiva estudar a viabilidade da mudança do processo da fabricação de machos de Hot Box para Shell Molding. É realizado um estudo de caso em uma fundição de latão, buscando maior produtividade e menor perda...

Corporate challenges imposed by global economic competitiveness, coupled with addressing social inequalities and environmental problems, have been growing and becoming increasingly a silent form of selection in the business environment. In this sense, an evolution of society awareness and public governments, to a notion change, with regard to socia...

The abrasive wear resistance of coatings of NiCrBSiFeC with the addition of 40% SiC applied by the flame spray process was evaluated. 420 μm thick layers were applied onto AISI 1020 steel substrates. The powder used is a commercial Metco ML16-C (Ni16Cr4Si4B3Cu3Mo2.5Fe0.5C) with particle size in the range of -125 +53 μm and mechanically mixed for 2...

Nesta terceira edição do relato de experiência a Comissão Local Organizadora e Científica da Universidade Federal do Recôncavo da Bahia (UFRB) foi a responsável por operacionalizar a confecção deste com o apoio da Diretoria da ABEPRO. Os objetivos são: • promover e incentivar experiências inovadoras na área de Educação em Engenharia de Produção no...

Product-service systems have been used as a tool for the practical application of the concepts of sustainability and circular economy. The customer experience through such systems has become an ally for its broad implementation, while customer acceptance is a barrier. However, it is unclear what contributes to customer experience and acceptance. Th...

A flexibilidade das tecnologias híbridas de fabricação (HMT) para integrar os processos produtivos e as atividades de manutenção contribui para o aumento do ciclo de vida de peças funcionais ou remanufaturadas, agregando-lhes valor, dado que, pelo elevado custo de fabricação, não se justifica seu descarte. O objetivo deste artigo é investigar quais...

Niobium pentoxide (Nb2O5) has excellent physicochemical properties regardless of the processing technology. The interest in its application in several fields has increased, especially in corrosive environments. However, when higher wear resistance is required, this material shows poorer results when compared to carbide base metals. In this work, th...

El objetivo de este artículo es presentar un modelo conceptual para describir qué parámetros pueden servir como base para gestionar la actividad de mantenimiento y sus políticas con alineamiento a las estrategias corporativas y de producción, en el contexto del uso de tecnologías de fabricación híbrida de productos metálicos, como parte del desarro...

Different coating technologies imply a large variation in the properties of the deposited material. This work compares, for the first time, the wear and corrosion performance of Stellite 6® coatings applied onto substrates of low carbon steel by the Gas Tungsten Arc Welding hot- wire cladding and by High Velocity Oxygen Fuel spraying technologies....

When looking at the tire maintenance work in a truck fleet, it is evident that the unplanned corrective maintenance is the most frequent. In this sense, the objective of this work was to develop maintenance engineering to improve tire management in a fleet. The work adopted the case study as its methodological approach and the company studied is a...

RESUMO Revestimentos são aplicados com o intuito de prolongar a vida útil de componentes que operam em ambientes agressivos. Revestimentos de material metal-cerâmico, conhecidos como cermet, como o WC-Co, consistem de carbonetos de tungstênio imersos numa matriz de cobalto e são utilizados como materiais resistentes ao desgaste. O processo de asper...

NbC coatings were flame sprayed on AISI 304L substrates and further remelted using a 400-W power ytterbium-doped fiber laser (YLR-500-MM-AC-Y11), inserted into a chamber for argon atmosphere control. For the selection of the remelting parameters, isolated beads with remelting of the coatings were performed using three focal lengths and three remelt...

Niobium pentoxide (Nb2O5) has excellent chemical and thermodynamic stabilities, characteristics that have accelerated the applications of this material in the form of coatings to protect against corrosive processes. However, few studies have evaluated its performance in wear protection applications. In this research, the slurry wear erosion resista...

Different factors drive transition from Linear Economy (LE) to Circular Economy (CE). In this context, this article aims to perform a systematic literature review about the factors that drive the transition to circular economy using a bibliometric analysis. The results of this bibliographic study lie in the identification of main publications and j...

In this study, NbC coatings, 250 µm thick, were deposited by low-velocity flame spraying on stainless steel substrates and were laser remelted in a controlled argon atmosphere. Isolated passes transverse of the coatings were performed at different focal lengths at speeds of 10, 15, and 20 mm/min. Using the selected laser parameters, layers were rec...

The retreading of truck and bus tires has economic importance, decreasing haulier operating costs, and environmental importance, reducing use of natural resources such as oil. In Brazil, mainly because it is an economic advantage, most of haulier companies have the practice of retreading their tires. The Brazilian providers of this type of service...

The development of research related to the characterization of niobium pentoxide (Nb 2 O 5) has been of great interest in the scientific and commercial community due to promising performances in bio-electrochemical applications, advanced catalysts and corrosive environments. In this work, layers of 250 μm, 350 μm and 550 μm of Nb 2 O 5 were deposit...

The objective of this research was to define and evaluate the threats and opportunities of digital media pose to traditional print media, from the perspective of journalists and readers with regards to the future of the press. The research took the form of an online survey, which produced two databases, one for journalists and one for readers. A va...

The objective of this research was to define and evaluate the threats and opportunities of digital media pose to traditional print media, from the perspective of journalists and readers with regards to the future of the press. The research took the form of an online survey, which produced two databases, one for journalists and one for readers. A va...

This paper assesses the microstructure, porosity, microhardness (Hv ) and fracture toughness (Kc) of cemented carbides coatings deposited by High-Velocity Oxygen Fuel (HVOF) and Flame (FSFC) spray processes. Three types of coatings were applied for each process from similar feedstock materials in powder and cored wire form. Measurements of fracture...

A análise convencional de investimentos em ativo fixo ocorre por meio de indicadores predominantemente financeiros. A proposta deste artigo é criar uma forma alternativa para complementar esta análise a partir da utilização dos objetivos de desempenho de operações aliado a métodos qualitativos e quantitativos. Para tanto foi feita uma revisão teóri...

This paper analyzes the maintenance function as a competitive approach within the company, as well as types, policies and conceptual elements related. The main objective is to present a conceptual schema to describe which constructs can serve as the basis for managing the maintenance activity and its policies aligned with the corporate and producti...

Purpose A competitive business strategy with a greater chance of success depends on an accurate quantitative analysis of business strategic factors prevailing in a company. This study conducts the latter to determine the level of competitiveness in a sector. Design/methodology/approach This study develops a tool based on literature classics and...

Niobium and its alloys have been used for several industrial applications including high strength low alloy steels (HSLA) in the automotive and aerospace industries, mainly because of being highly corrosion resistant in different media. Niobium pentoxide is an excellent option to reduce costs in repairing damages caused by corrosion, protection of...

Com a economia cada vez mais globalizada, as empresas precisam ser competitivas para continuarem existindo e, nesse sentido, investir é fundamental. Com essa percepção, este trabalho busca alternativas aos processos de análise de investimento em ativo imobilizado. Entendida essa relação e não identificando na literatura pesquisada nenhuma proposta...

Photoluminescence piezospectroscopy (PLPS) was used as a non-destructive technique for the measurement of residual stresses within the thermally grown oxide (TGO) layer beneath plasma-spray thermal barrier coatings (TBC). The technique has proved to be very effective for such measurements in YSZ thermal barrier coatings applied by EB-PVD but its ap...

A busca pela competividade no cenário atual de mercado obriga as indústrias a buscar constantemente soluções que possibilitem um ganho de vantagem competitiva por parte das organizações. Assim, cada vez mais, as empresas buscam métodos de gestão que lhes permitam reduzir custos, aumentar a rentabilidade e a satisfação dos clientes. O método Six Sig...

Stellite 6 is a widely applied hardfacing alloy with good corrosion and wear resistance. Several different techniques have been used to deposit this alloy, like oxyacetylene, Tungsten Inert Gas welding overlay, CO2 laser cladding and thermal spray methods. This paper evaluates the wear and corrosion resistance of Stellite 6 coatings applied by high...

An artificial neural network (ANN) analysis is used to obtain a model to predict the rate of erosive wear of hard coatings deposited by two different kinds of thermal spray techniques. High Velocity Oxygen Fuel (HVOF) and Flame Spray FlexiCords (FS/FC) techniques were used under various operational conditions. Different microstructural features tha...

Coatings are being increasingly used as an engineering alternative for advanced projects. Various techniques and processes are available for applying coatings, depending on the specific situation they are intended for. Thermal barrier coatings, known as TBCs, form part of a particular series of metal-ceramic coatings that are traditionally used in...

An evaluation of the relationship between the microhardness and fracture toughness with resistance to erosive wear of WC10Co4Cr, WC-12Co, and Cr3C2-25NiCr coatings was conducted. Powder and flexible cored wire feedstock materials were applied by high-velocity oxygen fuel (HVOF) and flame spray (FS), respectively. The erosive wear mechanism prevaili...

Companies constantly operate under pressure to produce more and faster with fewer resources. Managing factories, in this scenario, requires quantitative information on production to enable effective decision-making. In this study, we measured indexes concerning the bottleneck process of the production line of a large dairy company in order to suppo...

A study of the behavior of erosive wear was performed on two cemented carbides (WC-10Co-4Cr and WC-12Co) and chromium carbides (Cr3C2-25NiCr), deposited through methods thermal spray flame at low speed (flame Spray, FS) and hypersonic (High velocity Oxygen Fuel, HVOF). In the FS method novel materials were used as a deposit in the form of cord (Fle...

Residual Stresses Measurements in Plasma Sprayed TBCs with Cold Sprayed Bond Coats by Photoluminescence Piezospectroscopy” C.R.C.Lima, S. Dosta, J. M. Guilemany, D.R.Clarke DVS-Berichte .Vol 324.ISBN 978- 3-87155-574-9. pp 586-590.DVS Media GmbH. Germany. (2016).

The erosive wear and corrosion resistance of three types of flame spray-deposited polymer coatings was analyzed. The erosive wear test was performed in slurry pot tester with rotational movement using distilled water and mix quartz particles (300 g/l). Two impact angles of the particles were used, reaching 4.15 m/s average impact velocity. Corrosio...

In this study, Vickers indentation testing is used to determine the fracture toughness of hard flame spray coatings produced from cored-wire feedstocks, including WC-10Co4Cr, 75CrCo-25NiCr, and WC-12Co. Average measured values are compared with fracture toughness values calculated from seven different equations found in the literature in order to v...

Residual Stresses Measurements in Plasma Sprayed TBCs with Cold Sprayed Bond Coats by Photoluminescence Piezospectroscopy C.R.C.Lima, S. Dosta, J. M. Guilemany, D.R.Clarke International Thermal Spray Conference and Exhibition. ITSC 2016. ASM International & DVS. Thermal Spray Society. Ref 4860. ISBN 978-3-96144-000-9. Shanghai.P.R.China. (2016).

Most of materials used in applications that require high wear resistance also undergo corrosive action of the service environment. The damage caused by the combination of both processes on the materials leads to huge economic losses in industry. Hard coatings are widely used as engineering solution to increase the lifetime of components operating i...

Failures while nonconformities in production affect the availability of assets, reducing competitiveness, so that its control and prevention are essential for increased competitiveness. Several analysis tools are available and help in the control and prevention of failures. Each of the available tools has specific characteristics that promote its u...

Resumo Revestimentos são crescentemente utilizados como alternativa de engenharia em projetos avançados. Diversas técnicas e processos estão disponíveis para a aplicação de revestimentos, dependendo da condição específica a que se destinam. Revestimentos para barreira térmica, conhecidos como TBC, fazem parte de uma série especial de revestimentos...

High Temperature Oxidation of Cold Gas Sprayed Bond Coats for TBC Application C.R.C.Lima, M.J.X.Belem, V.Crespo, I.G.Cano, S.Dosta, J.M. Guilemany ASM International. Thermal Spray Society.Vol 1. Pp 71- 76. ISBN 978-1-5108-1154-6.USA.(2015).

Computer numerical control (CNC) technology has received high level of investment around the world. Considering machine tool for machining operations, almost one third of those installed in Brazilian industrial companies is composed of CNC machines. About 46% of them are less than ten years old and belong to a generation of machine tools that shoul...

Strategic success requires a sound, firm structure and an effective system with which to analyze the competition, suppliers, and consumers, including structured and non-structured data (or “Big Data”).The more detailed the profiles of those players, the more useful the analyses will be to managers who ordinarily do not use a model to assess competi...

As result of Globalization, enterprises should act properly on very aggressive and competitive markets. To achieve this goal, not only product development cycles should be decreased, but also new added value services and products must be created, which, in turn, are delivered as a result of successful projects. Besides, ongoing processes have to be...

Sprayed deposits using conventional wire and powder materials open a wide range of possibilities to solve wear problems in engineering equipment. The option for new different spray technologies and consumables like nanostructured powder materials and nanocomposite cored wires has expanded the engineering possibilities. Cored wire technology allows...

The damage caused by the combination of corrosion and wear processes on the materials that machine elements are produced causes huge losses in several industries such as mineral processing, chemical, petrochemical and power generation. Some devices that operate in harsh environments, such as centrifugal pumps for transportation of caustic liquor us...

Plasma sprayed thermal barrier coatings (TBCs) have been extensively employed in most aerospace and land based turbine engines, permitting gas temperatures to be raised substantially above those for uncoated systems. Traditional TBC systems are composed of a metallic bond coat and a ceramic top coat both applied by plasma spraying. New deposition t...

Study of the Application of Photoluminescence Piezospectroscopy for Residual Stresses Measurements in Thermally Sprayed TBCs C.R.C.Lyma, V.Crespo, S. Dosta, I. G. Cano, J. M. Guilemany, D.R.Clarke Les Rencontres Internationales sur la Projection Thermique (7RIPT). European Thermal Spray Association (ETSA). Proceedings RIPT, CD Edition. Limoges. Fr...

Erosion-corrosion experiments on carbide coatings were conducted to quantify the contributions of erosion and corrosion components to the total wear weight loss. WC-17Co, WC-12Co and Cr 3 C 2-25NiCr coatings were deposited by HP-HVOF spray onto steel substrate. Wear-corrosion tests were carried out in a rotatory tribometer. The main degradation mec...

Há mais de quatro décadas, os revestimentos para barreira térmica, ou simplesmente TBC, vêm sendo decisivos para o desempenho de turbinas a gás no segmento aeronáutico e aeroespacial e, mais recentemente, também no desempenho de turbinas de geração de energia e motores diesel. Sua importância se sobrepõe aos desenvolvimentos conseguidos na área de...

This work evaluates and compares the properties of weld overlays and thermal spray coatings produced using different feedstock materials. The mechanical and metallurgical characteristics of the coatings and their performance in corrosion and wear tests are discussed.

Global companies and markets require greater flexibility and agility to compete, leading to supply chains (SC), structures in which each link is responsible for adding value through the operations it performs and aiding them to focus on optimization of operations and integrated logistics. From this productive arrangement, competition occurs now amo...

Thermal spray processes have been widely used to minimize losses caused by wear mechanisms. Sprayed deposits using conventional wire and powder materials have been long solving tribological problems in engineering equipment. More recently, the option for new different technologies and consumables like nanostructured powder materials and nanocomposi...

Nas últimas décadas, diversos modelos de gestão de processos de negócios foram apresentados e ajudaram empresas a melhorarem o seu desempenho organizacional. Nesse contexto, o objetivo desse trabalho é apresentar um modelo para o sistema de gestão de pneus em uma frota. O trabalho adota como abordagem metodológica o estudo de caso, por tratar-se de...

With the creation by law 7.256/84 status of micro and small enterprises occurred less bureaucracy of stockpiling, which generated a significant increase in the country's economy. In this direction, a concern about the condition competitiveness, especially as the gains competitive advantage to continue operating and elevating Brazil's position in th...