Lfa 467 ht hyperflash

Thermal conductivity is related to the efficiency of holding time during the hot press. In other words, a higher thermal conductivity of samples in the hot press may produce higher mechanical properties of samples. Ti₄₂Zr₃₅Ta₃Si₅Co_12.5Sn_2.5 BMG foams with Cu spacers were fabricated using a cylinder with a diameter of 7 mm and a thickness of 2 mm by using the hot press machine. Their thermal conductivity was measured using the thermal property tester (LFA 467 HT HyperFlash, Netzsch, Selb, Germany). To calculate thermal conductivity, the density and specific heat capacity were measured using the Archimedes method and a differential scanning calorimeter (DSC), respectively. Finally, the thermal conductivity of the samples was calculated using the following Equation (5): $$k=\alpha \times \rho \times \complement \rho$$
where $k$ is the thermal conductivity (W/mK), $\alpha$ is the thermal diffusivity (mm²/s), $\rho$ is the density (g/cm²), and $\complement \rho$ is the specific heat capacity of the samples (J/gK).
The glass-forming ability of Ti₄₂Zr₃₅Ta₃Si₅Co_12.5Sn_2.5 foams without Cu spacers was analyzed using a DSC (DSC404, Netzsch, Selb, Germany) at a heating rate of 40 K/min.

SDT Q600 (accuracy ± 2%, TA instrument, Newcastle, Delaware, USA) was used to obtain a glass transition temperature of neat SMP epoxy and GrF-SMP composite. The specimens were heated to 200 °C at a heating rate of 100 °C/min in the argon environment. The T_g values of epoxy SMP and GrF-epoxy SMP composites were determined from the curves’ inflection temperatures. Thermal diffusivities and specific heat capacities of the epoxy SMP and GrF-epoxy SMP composites were measured by the flash method using NETZSCH LFA 467 HT HyperFlash (accuracy of thermal diffusivity ± 3%, accuracy of specific heat ± 3%, Burlington, MA, USA) within the temperature range of 25 to 70 °C. A circular sample of 11 mm diameter and 3 mm thickness was used for thermal diffusivity measurements. The GrF-epoxy SMP, when cut to the dimension mentioned above, had 0.13 wt.%. of GrF. Thermal conductivity was calculated by measuring the diffusivities, specific heats, and bulk densities of at least 5 samples.