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....
Metal foams are materials composed of a solid grid with air-filled pores, and have applications in combustion chambers of gas turbines. In this study, the thermal properties of porous metal foams were tested to determine their usefulness in heating and cooling systems. The Transient Plane Source (TPS) method was used to measure the thermal conductivity of porous metallic foams. Because the porous foams were not as compacted as the dense ...
This study aimed to determine the thermal conductivity of gas-filled Metal Organic Framework (MOF) materials. Glass beads were used as the reference material, and nitrogen (N2) and helium (He) were added to the MOF materials. A TPS instrument measured the thermal conductivity of the MOF samples using the Transient Plane Source (TPS) method. Results showed that the MOF materials containing copper had higher thermal conductivities than iron-filled materials, and the ...
Porous monoliths, often referred to as polymerised High Internal Phase Emulsions (polyHIPEs), are materials made of polymers that have applications ranging from chemical engineering to biomedicine. In this paper, a TPS instrument measured the thermal conductivity of tannin-based monoliths with the transient plane source (TPS) technique. Results showed that as the porosity of the polyHIPEs increased, the thermal conductivity decreased linearly, a characteristic that could be used for applications in ...
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, ...
