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Recommended Papers for: density

Total Papers Found: 110

Low-cost preparation and frictional behaviour of a three-dimensional needled carbon/silicon carbide composite

Phenolic resin impregnation was combined with liquid silicon infiltration to create a carbon/silicon carbide composite. The potential application for this material is in disc brakes in vehicles due to their oxidation resistance and friction behaviour. The density of the composite was altered until a final value of 2.10g/cm3 was achieved. The thermal conductivity of the composite was measured using the TPS method, and was determined to be 48.72 W/...

Author(s): , , , , , ,

A study of the thermal conductivity of granular silica materials for VIPs at different levels of gaseous pressure and external loads

This research investigates the core materials used to create vacuum insulation panels. Of particular interest to the investigators was the thermal conductivity of the initial materials (usually powders) under different pressures. The researchers designed their own powder sample cell holder. The powders tested were low density silica powders, and using the sample set up the team was able to test them along a pressure range from atmospheric pressure to 0.1mbar. ...

Author(s): , , ,

Effect of carbon nanotube interfacial geometry on thermal transport in solid–liquid phase change materials

The thermal conductivities of four composite paraffin phase change materials (PCMs) containing embedded multi-walled carbon nanotubes (MWCNTs) with varying dimensions were determined. The goals of this study were to investigate the interfacial thermal resistance between two MWCNTs, and to investigate the ballistic and diffusive components of the thermal resistance at the interface. It was found that the thermal conductivity of the composite PCMs increased with the diameter of the MWCNT ...

Author(s): ,

Novel lightweight and highly thermally insulative silica aerogel-doped poly (vinyl chloride)-coated fabric composite

In this research silica aerogels were incorporated into PVC fabrics by the research team to improve the overall performance of the fabrics. The aerogel was added in percent fractions of 0, 2, 3, and 4%. Comprehensive analysis of physical and mechanical properties was also performed. Thermal conductivity measurements revealed that the addition of the silica aerogel had reduced the thermal conductivity of the fabric; when 4% silica was added, the thermal conductivity dropped by 26%. As ...

Author(s): , , ,

Thermal conductivity of polyamide 12 powder for use in laser sintering

In order to better understand how the laser sintering process affects polyamide 12 powder, the authors measured the thermal conductivity of polyamide 12 powder at various densities and conditions. The investigations determined that thermal conductivity of polyamide 12 powder is influenced by temperature and density. The researchers hope to improve the thermal control in laser sintering processes....

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