Materials Map

Discover the materials research landscape. Find experts, partners, networks.

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The Materials Map is an open tool for improving networking and interdisciplinary exchange within materials research. It enables cross-database search for cooperation and network partners and discovering of the research landscape.

The dashboard provides detailed information about the selected scientist, e.g. publications. The dashboard can be filtered and shows the relationship to co-authors in different diagrams. In addition, a link is provided to find contact information.

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The Materials Map is still under development. In its current state, it is only based on one single data source and, thus, incomplete and contains duplicates. We are working on incorporating new open data sources like ORCID to improve the quality and the timeliness of our data. We will update Materials Map as soon as possible and kindly ask for your patience.

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in Cooperation with on an Cooperation-Score of 37%

Topics

Publications (6/6 displayed)

  • 2023Effect of tungsten carbide reinforcement phase on the abrasive wear performance of metal matrix composites deposited by laser cladding2citations
  • 2022Tribological performance of Ni-Cr-B-Si coatings deposited via laser cladding process4citations
  • 2021Laser remelting of WC-CoCr surface coated by HVOF: Effect on the tribological properties and energy efficiency20citations
  • 2020Abrasion resistance of Ni-Cr-B-Si coating deposited by laser cladding process56citations
  • 2018Avaliação tribológica de óleos hidráulicos biodegradável e mineral com deslizamento entre as ligas de Cu-Zn e WC-CoCr1citations
  • 2018A Comparison of Microstructural, Mechanical and Tribological Properties of WC-10Co4Cr - HVOF Coating and Hard Chrome to Use in Hydraulic Cylinders14citations

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Pereira, Milton
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Panziera, Renato Camponogara
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Castro, Richard De Medeiros
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Neto, Flavio Guedin
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Pereira, Adriano De Souza Pinto
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  • Pereira, Milton
  • Panziera, Renato Camponogara
  • Castro, Richard De Medeiros
  • Neto, Flavio Guedin
  • Pereira, Adriano De Souza Pinto
  • De Souza Pinto Pereira, Adriano
  • Machado, Paulo Cordeiro
  • Sousa, Jurandir Marcos Sá De
  • Silva, Rafael Gomes Nunes
  • Inacio, Luiz Fernando Feltrim
  • Rocha, Alexandre Da Silva
  • Ratusznei, Francisco
  • Marcello, Reginaldo Rosso
  • Peruch, Fábio
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article

Avaliação tribológica de óleos hidráulicos biodegradável e mineral com deslizamento entre as ligas de Cu-Zn e WC-CoCr

  • Inacio, Luiz Fernando Feltrim
  • Curi, Elvys Isaías Mercado
  • Marcello, Reginaldo Rosso
  • Castro, Richard De Medeiros
Abstract

RESUMO A correta seleção dos óleos lubrificantes e das superfícies de contato melhoram o desempenho e reduzem o consumo de energia das máquinas Por isso, a engenharia de superfícies propõe novos revestimentos aos quais seu comportamento tribológico combinado com o uso de óleos biodegradáveis em componentes de sistema hidráulicos, não são conhecidos. O objetivo deste trabalho foi avaliar o comportamento do óleo mineral - HLP e do biodegradável sintético - HEES, submetido ao deslizamento de um pino de liga Cu-35Zn, contra uma superfície plana revestida com WC-10Co4Cr por alta velocidade térmica. pulverização - HVOF. A combinação de óleos biodegradáveis com superfícies de menor impacto ambiental é importante para a sustentabilidade e crescimento da indústria moderna. O desempenho dos lubrificantes foi avaliado por meio de testes de deslizamento em um tribômetro pino sobre disco, modificando as cargas, para identificar os regimes de lubrificação, fricção e desgaste. Os testes indicaram que os valores do coeficiente de atrito médio foi de µHEES = 0,054 e µHLP = 0,044, assim mesmo o limite do regime de lubrificação foram próximos. A espessura mínima do filme (hmín) foi 23 % maior para o HLP e os valores obtidos de parâmetro do filme (λ) foi diferente a resultados de outras superfícies. Na avaliação do desgaste do pino e disco, percebeu-se que as maiores concentrações dos aditivos de Zn e P, encontradas no HLP, reduz o dano na superfície. Portanto, há a necessidade de se avaliar o tipo de superfície lubrificada com óleo do tipo HEES, bem como, fazer alterações das concentrações de aditivos. ABSTRACT The correct selection of lubricating oils and contact surfaces improves performance and reduces the energy consumption of the machines. Therefore, surface engineering proposes new coatings to which their tribological behavior combined with the use of biodegradable oils in hydraulic system components are unknown. The aim of this study was to evaluate the behavior of the mineral oil - HLP and the synthetic biodegradable - HEES, subjected to sliding of a pin made of Cu-35Zn alloy, against a flat surface coated with WC-10Co4Cr by high-speed thermal spraying - HVOF. The combination of biodegradable oils with surfaces of lesser environmental impact is important for the sustainability and growth of the modern industry. The performance of the lubricants was evaluated by means of sliding tests on a pin-on-disc tribometer, modifying the loads, to identify the lubrication, friction and wear regimes. The tests indicated that the average coefficient of friction was μHEES = 0,054 and μHLP = 0,044, so the limit of the lubrication regimes was close. The minimum film thickness hmín was 23 % higher for HLP and the obtained values of the film parameter (λ) were different from the results of other surfaces. In the evaluation of the wear of the pin and disk, it was found to that the higher concentrations of the additives of Zn and P, found in the HLP, reduces the surface damage. Therefore, it is necessary to evaluate the type of surfaces lubricated with oils of the HEES type, as well as changes in additive concentrations should be made.

Topics
  • impedance spectroscopy
  • mineral
  • surface
  • coefficient of friction