Roughness Average
Mostrando 13-24 de 62 artigos, teses e dissertações.
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13. Failure criterion for adhesively bonded joints using Arcan´s experimental method
Characterization of polymeric materials mechanical behavior requires some previous knowledge about their structure, which allows the choice of more appropriated models and methods. Polymeric materials, below their glass transition temperature (Tg), may be handled as perfect elastic solids, allowing the use of classic mechanics to characterize their behavior.
Polímeros. Publicado em: 2014-08
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14. Characterization of SiC thin films deposited by HiPIMS
In this work thin films of silicon carbide (SiC) were deposited on silicon wafers by High Power Impulse Magnetron Sputtering (HiPIMS) technique varying the average power of the discharge on a stoichiometric SiC target. X-ray diffraction, Raman spectroscopy, scanning electron microscopy and profilometry were used to analyze the films. It was observed that hig
Mat. Res.. Publicado em: 01/04/2014
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15. Bulk and surface properties related to composite filler size
There are few studies that fully characterize the effect of the filler size on the surface, optical and mechanical properties of resin composites. AIM: To determine the influence of the filler size content on surface, optical and mechanical properties before and after accelerated aging. METHODS: Seven resin composites were investigated: Filtek Supreme® (3M/
Braz. J. Oral Sci.. Publicado em: 2013-12
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16. Microtopografia de implantes de titânio com diferentes tratamentos de superfícies à microscopia eletrônica de varredura e de força atômica / Microtopography of titanium implants with different surface treatments scanning in electronic microscopy and atomic force microscopy
Introduction: Bone-implant interface quality may be influenced by surface roughness and determines how cells interact, cling to and fix to, therefore can enhance and shorten the time for osseointegration. This study aims to analyze qualitatively the topography and architecture of different dental implants surfaces, to compare and describe them. MATERIALS AND
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 31/08/2012
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17. The influence of surface treatment on the implant roughness pattern
An important parameter for the clinical success of dental implants is the formation of direct contact between the implant and surrounding bone, whose quality is directly influenced by the implant surface roughness. A screw-shaped design and a surface with an average roughness of Sa of 1-2 µm showed a better result. The combination of blasting and etching ha
J. Appl. Oral Sci.. Publicado em: 2012-10
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18. Modelling and optimization of the surface roughness in the dry turning of the cold rolled alloyed steel using regression analysis
Surface quality of the machined parts is one of the most important product quality indicators and one of the most frequent customer requirements. The average surface roughness (Ra) represents a measure of the surface quality, and it is mostly influenced by the following cutting parameters: the cutting speed, the feed rate, and the depth of cut. Quantifying t
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2012-03
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19. Avaliação do desgaste e da alteração da rugosidade superficial em resinas compostas de diferentes características submetidas à escovação simulada e ciclagem de pH / Wear and surface roughness alteration evaluation of different composite resins after toothbrushing and pH cycling
The present study aimed to quantitatively evaluate the surface roughness alteration and wear of resin composites with different characteristics of organic matrix and inorganic filler when submitted to simulated toothbrushing abrasion and pH cycling. Three different resin composites were evaluated: Filtek Z250 (Bis-GMA, microhybrid), Filtek Z350 (Bis-GMA, nan
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/08/2011
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20. Influência da rugosidade e energia livre de superfície de materiais para próteses removíveis a base de polimetilmetacrilato nas propriedades do biofilme de Candida albicans / Influence of the roughness and free energy surfasse of the materials for removable prosthesis the base of polymethymethacrylate in the properties of biofilm of Candida albicans
The properties of surface of the resins and reliners base of polymethymethacrylate used in removable dental prosthesis can interfere in the adhesion, colonization and formation of biofilm of Candida spp., microorganism associated to the prosthetic stomatitis. The objective of this research was to evaluate the influence of the roughness and the free energy of
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/07/2011
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21. Physical-chemical characteristics of whitening toothpaste and evaluation of its effects on enamel roughness
This in vitro study evaluated the physical-chemical characteristics of whitening toothpastes and their effect on bovine enamel after application of a bleaching agent (16% carbamide peroxide). Physical-chemical analysis was made considering mass loss by desiccation, ash content and pH of the toothpastes. Thirty bovine dental enamel fragments were prepared for
Brazilian Oral Research. Publicado em: 08/07/2011
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22. Surface roughness of orthodontic band cements with different compositions
OBJECTIVES: The present study evaluated comparatively the surface roughness of four orthodontic band cements after storage in various solutions. MATERIAL AND METHODS: Eight standardized cylinders were made from 4 materials: zinc phosphate cement (ZP), compomer (C), resin-modified glass ionomer cement (RMGIC) and resin cement (RC). Specimens were stored for 2
Journal of Applied Oral Science. Publicado em: 2011-06
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23. Efeito de substâncias ácidas e alcoólica sobre a rugosidade de superfície de resinas compostas / Effect of alcohol and substances acid on surface roughness of composite resins
The aim of this study was to evaluate in vitro of superficial roughness and surface morphology of composite resins stored 180 days in acid and alcoholic solutions present in the diet. Seven composite resins indicated for the previous and posterior teeth restorations were selected for this study (Charisma / Kulzer, Opallis / FGM, Esthet-X/Dentsply, 4Season/Iv
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/09/2010
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24. Atmospheric flow measurements using the PIV and HWA techniques
Abstract: Alcântara Space Center (ASC) is the Brazilian gate to the space where rockets of different sizes are launched. At ASC there is a relative topographical variation, coastal cliff, which modifies the atmospheric boundary layer characteristics and can cause interference for operations of rockets. In the present work, a simplified model (mock-up) was s
J. Aerosp. Technol. Manag.. Publicado em: 2010-08