Grinding And Polishing
Mostrando 1-11 de 11 artigos, teses e dissertações.
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1. Microstructural Characterization and Influence of Ceramography Method on the Microhardness of Sintering Agents Added Silicon Carbide
This study carried out the microstructural characterization, by light microscopy, of sintered SiC in the presence of liquid phase at temperatures of 1800, 1850 and 1900 ºC, added with Al2O3 and Y2O3 as well with Al2O3-YAG composite in the proportions of 5, 10 and 15% by weight. It was possible to observe the formation of microstructural patterns resulting f
Mat. Res.. Publicado em: 15/05/2017
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2. Effect of surface finishing on friction and wear of Poly-Ether-Ether-Ketone (PEEK) under oil lubrication
Abstract The tribological properties of poly-ether-ether-ketone (PEEK) containing 30% of carbon fiber were studied in an oil-lubricated environment and different surface finishing of the metallic counterbody. Four different finishing processes, commonly used in the automotive industry, were chosen for this study: turning, grinding, honing and polishing. The
Polímeros. Publicado em: 08/12/2016
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3. The Influence of Sample Preparation on the Quantitative Analysis of the Volume Fraction of Martensite Formed in a 304l Trip Steel
The metastable 304L austenitic stainless steels are susceptible to phase transformation induced by plastic deformation. The traditional metallographic preparation, via mechanical methods, introduces superficial plastic deformation from grinding and polishing. It is important to evaluate this effect on the results of quantitative analysis of martensite formed
Mat. Res.. Publicado em: 23/10/2015
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4. Uma contribuição ao estudo do torneamento em eixo comando de motores de ferro fundido cinzento / A turning contribution study to gray casting iron engine camshaft
A busca pela competitividade industrial tem sido a tônica dos últimos tempos. Uma das formas de se atingir alto nível nesse quesito é a diminuição dos custos de fabricação. A usinagem é um dos processos de fabricação mais importantes quando se necessita de tolerâncias mais precisas. Dentro da usinagem, um dos processos que apresentam maior custo
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/07/2011
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5. Estudo de retificação de vidros ópticos / A study of optical glasses grinding
The development of optical systems, the use of laser and consequently the need of refractive surface with high finish levels and precision are increasing significantly the demand for research on high precision machining. The surfaces obtained with the usual polishing process are lirnited in plane, cilindrical and spherical shape and spend a lot of time to ob
Publicado em: 2006
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6. Influencia do tratamento de superficie na rugosidade Ra e dureza Vickers de ceramicas para cobertura incisal
The objective of this study was to evaluate the influence of surface treatment on surface roughness and Vickers hardness number of the eight dental enamel ceramics, after abrasive grinding and 4 surface treatments with polishing and/or glaze. Forty enamel ceramic disks with 8 mm in diameter and 2.0 mm thickness were made in bipartite metallic matrix for each
Publicado em: 2005
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7. Improvements of ultra-high molecular weight polyethylene mechanical properties by nitrogen plasma immersion ion implantation
Nitrogen Plasma Immersion Ion Implantation (PIII) has been used to modify the surface chemical structure of Ultra High Molecular Weight Polyethylene (UHMWPE). Grinding and polishing processes based on abrasive papers and alumina pastes have been evaluated with regard to their results on the improvement of polymer surface roughness, which has shown to be of c
Brazilian Journal of Physics. Publicado em: 2004-12
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8. Omega 900 e vitadur alpha ceramics using three different polishing systems / "Análise in vitro da rugosidade superficial apresentada pelas porcelanas omega 900 e vitadur alpha após a utilização de três diferentes sistemas de polimento"
SUMMARY Aesthetic dentistry uses materials that can copy some lost caractheristics of the natural dentition, as color, mechanical resistance and smoothness.The better material for this are the ceramics. On the other hand, it is commum to have to grind them with diamond instruments for adjustment wich removes the glazed surfaces. This procedure can cause abra
Publicado em: 2003
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9. Uma contribuição para o monitoramento de retificação cilindrica de mergulho / A contribution to cylindrical plunge grinding monitoring
The main goal of this work is to verify the feasibility of employing artificial neural networks to analyse signals from several sensors (acoustic emission, vibration and electric current) attached to the tailstock of a cylindrical plunge grinding machine in order to increase the accuracy of the automatic decision of the wheel dressing momento A second goal i
Publicado em: 1999
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10. Efeito do tratamento superficial na devitrificação e dissolução da silica vitrea / Effect of surface treatment on devitrification and dissolution of vitreous silica
The effect of surface stress and roughness, produced by polishing process with abrasive powder, was investigated on the devitrification and dissolution of silica glass. The characterization studies of the silica glass treated by grinding, polishing and etching and their effect on the devitrification were conducted by X-ray diffraction, optical and electronic
Publicado em: 1997
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11. Comparação sobre a utilização de diferentes sensores no monitoramento do processo de retificação
A determinação de forma objetiva do fim da vida do rebolo é de fundamental importância para a minimização do custo do processo, pois evita a rejeição de peças, que nesta fase do processo possuem alto valor agregado e otimiza a utilização da ferramenta bem como dos tempos de dressagem. Este trabalho tem como objetivo, mostrar o comportamento de div
Publicado em: 1997