Foams
Mostrando 1-12 de 99 artigos, teses e dissertações.
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1. Manufacturing and characterization of sustainable macroporous glass foams
Abstract This work produced glass foams from soda-lime glass bottles, bentonite, and alumina by the replica method. Compositions with different contents of bentonite (5, 10, 15, and 20 wt%) were prepared and heat-treated at 800 °C. In the alumina-added compositions, 50 wt% of the bentonite was replaced by the alumina. The influences of the content of benton
Cerâmica. Publicado em: 2022
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2. Production of Carbon Foams from Rice Husk
The production of a material with rigid, multifunctional three-dimensional porous structure at a low cost is still challenging to date. In this work, a light and rigid carbon foam was prepared using rice husk as the basic element through a simple fermentation process followed by carbonization. For the fermentation process, the amount of biological yeast (7.5
Mat. Res.. Publicado em: 11/11/2019
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3. Preparation of Syntactic Foams made from Green Polyethylene and Glass Microspheres: Morphological and Mechanical Characterization
Polymeric syntactic foams are composites made from the mixture of Hollow Glass Microspheres (HGM) and polymer matrices. One of their main characteristics is their low density and the production of these composites using a matrix derived from renewable sources potentiates their development without neglecting sustainability. In this paper , the properties of H
Mat. Res.. Publicado em: 11/11/2019
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4. Desenvolvimento de espumas vítreas a partir de garrafa e casca de ovo
RESUMO Este trabalho tem como foco a produção de espumas vítreas a partir de materiais reciclados, fazendo uso de matéria-prima de fácil acesso local e alta incidência no mercado: garrafas de cerveja não retornáveis e casca de ovo, como agente espumante. Para tanto, investigou-se a influência da temperatura de queima, da granulometria do vidro precu
Matéria (Rio J.). Publicado em: 20/05/2019
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5. Sustainable Glass Foams Produced from Glass Bottles and Tobacco Residue
In this work, discarded soda-lime-silica glass bottles and tobacco residue (after oil extraction to produce biodiesel) were prepared in different formulations to obtain glass foams. The formulated compositions were homogenized and uniaxially compacted at 40 MPa then fired at 850 ºC and 900 ºC for 60 min to investigate the effects of tobacco residue and tem
Mat. Res.. Publicado em: 03/12/2018
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6. Influence of Ionizing Radiation on Biodegradable Foam Trays for Food Packaging Obtained from Irradiated Cassava Starch
ABSTRACT Biodegradable polymers, such as starch, cellulose, and derivatives thereof, are being studied to produce innovative packaging in the most diverse shapes (films, bags, trays, bottles, etc.) to attend this current market trend. The aim of this work was to produce foam trays from cassava starch for food packaging via extrusion followed by thermoforming
Braz. arch. biol. technol.. Publicado em: 29/10/2018
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7. Espuma ultraliviana de Mg a partir de viruta reciclada
ABSTRACT Hundreds of people worldwide die or are severely maimed in collisions during traffic accidents, due to the energy transmitted to the passengers on impact. A dissipation of said energy is necessary to minimize it's effects, which can be achieved through absorbers. In recent years, metallic foams have started to be considered as energy absorbers. Meta
Matéria (Rio J.). Publicado em: 19/07/2018
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8. Manufacturing of Cu-Sn foams through SDP
ABSTRACT This work reports the processing of bronze foams manufactured by using the powder metallurgy method known as Sintering Dissolution Process. During the sintering step, a device with controlled atmosphere separated from the heating furnace was employed to avoid the quick oxidation of metal particles. The device allows to control its internal atmospher
Matéria (Rio J.). Publicado em: 19/07/2018
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9. Fabricación de espumas de cobre por pulvimetalurgia
ABSTRACT A method for the fabrication of copper foams by powder metallurgy, employing carbamide beads as space holders, is presented. These are removed by water dissolution before sintering the compact. The method allows for a precise control of the cell characteristics (size, shape and distribution) within an interconnected porosity. The use of metal powder
Matéria (Rio J.). Publicado em: 19/07/2018
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10. Investigations on the mechanism and behavior of dynamic energy absorption of metal foam
Abstract Metal foams have been widely used in the engineering fields due to its excellent energy absorption capacity under impact. Under different impact velocities, metal foam exhibits different energy absorption properties. It is important to investigate the mechanism and behavior of energy absorption of metal foam under impact. In this study, a 3D micros
Lat. Am. j. solids struct.. Publicado em: 02/07/2018
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11. Effect of PVA and PDE on selected structural characteristics of extrusion-cooked starch foams
Abstract The aim of this work was to determine selected physical properties of biodegradable thermoplastic starch (TPS) filling foams manufactured by extrusion-cooking technique from different combinations of potato starch and two additives: poly(vinyl alcohol) PVA and Plastronfoam PDE. Foams were processed with seven starch/additives combinations at two di
Polímeros. Publicado em: 15/03/2018
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12. Cellular Ceramics Produced from Ceramic Shell: Processing and Characterization
In this work, ceramic shell (mullite source), an industrial solid waste from the lost-wax casting process, after crushing and milling steps, was used and evaluated as an alternative raw material source for the production of cellular ceramics for high temperature applications (> 1400 °C). The obtained ceramic shell powder, with particle size distribution (d5
Mat. Res.. Publicado em: 09/11/2017