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Wood can be defined as a composite, porous material as it is effectively made of two different substances. This property is reflective of how differently the wood grows with respect to the four seasons and how the materials in the wood can change based on ambient heat. The constant change in seasons therefore forms wood grains, which show the differing thermal properties of wood material. This paper finds the apparent ...
In this study, sintering parameters in conventional pressure-less sintering are analyzed and the effects of uncoated, Cu(Ni)-coated, and Cr-coated diamond particles are compared for their bulk thermal conductivities. Thermal conductivity was measured at room temperature using a Thermal Constant Analyzer. The addition of diamond particles caused a decrease in the thermal conductivity due to facial air gaps in the composites....
Soft tooling processes use flexible polymeric materials to manufacture moulds. However, the malleable materials used for soft tooling, such as silicone rubber, have low thermal conductivities and take an extensive amount of time to cool. In this study, metallic (Aluminum fine powder, grey iron, copper, magnesium, titanium, zinc) and non-metallic (graphite, silicone, glass) thermally conductive filler particles were added to silicone rubber to condense the cooling time of soft tooling ...
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 ...
A disc of a composite ceramic material composed of silicon nitride (Si3N4) and 20% hBN was prepared and its tribological characteristics were investigated by sliding a Si3N4 pin across its surface at different sliding speeds. The friction coefficient and wear coefficient were determined for the composite using two different test modes: one in which the pin was kept stationary and the disc was rotated on top of the pin, ...
