The author compares some currently existing method of measuring thermal conductivity and elaborates on a couple of newer methods. The pre-existing methods include hot wire and laser flash diffusivity, and the newly introduced methods are the modified how wire (MHW) and transient plane source (TPS) techniques. The necessary conditions (samples sizes, sample composition, test times, etc) are explained for the two newly introduced techniques. Experimental runs are carried out using ...
Thermal barrier coatings (TBC) are plasma sprayed onto gas turbine parts in order to improve combustion efficiency and component life time. Two TBC are looked at in this report: yttria partially stabilized zirconia (YPSZ) and dysprosia partially stabilized zirconia (DyPSZ). Both the TPS and laser flash techniques were used to measure the thermal conductivity of the coatings and the results were compared. In addition the effect of barrier microstructure on ...
The authors prepared a series of carbon nanotube (CNT) nanorefrigerants with varying size and amount of nanotubes to determine how these properties affect thermal conductivity. A TPS Instrument was used to measure thermal conductivity of the nanorefrigerants; R113 was used as a host nanorefrigerant. It was determined that higher concentrations of smaller diameter CNTs results in higher nanofrigerant thermal conductivity. A few theoretical models were also used to compare to ...
The transient plane source (TPS) technique was used for the measurement of thermal properties of superconductors at low temperatures. The superconductors explored include Y123 and Bi2223. One of the main goals of the work was to develop a system where measurements could be made in the temperature range from 84 - 293 K....
The thermal conductivity and diffusivity of a series of three-phase styrene butadiene composites were investigated using the transient plane source (TPS) technique. Both of the series contained a variable amount of natural rubber, as well as variable amounts of silica and clay. The thermal properties decreased sharply at 10 phr filling, but increased subsequently after that. It was determined that silica resulted in better (higher) thermal properties as compared to clay....
