In this study, b-SiC powder was prepared using a pyrolysed spherical precursor derived from the hydrolysis mixture of phenyltrimethoxysilane and tetraethyl orthosilicate. Before the pyrolysed experiment, an alkoxide precursor was characterised using 29 Si solid nuclear magnetic resonance, Fourier transform infrared spectroscopy and thermogravimetric analysis. The alkoxide precursor was heated at 1800uC for 4 h under an Ar atmosphere. To examine the pyrolysed residue after heat treatment, the sample was collected and analysed with X-ray diffraction. The X-ray diffraction results for the sample show diffraction peaks at ,35, 60 and 73u, which correspond to the b-SiC phase. According to the results of chemical analysis, the SiC content of the powder that was prepared at 1800uC was determined to be 99?4%. The sintering behaviour of the prepared b-SiC powder was examined using B 4 C and C as sintering additives in the temperature range of 1900-2200uC.

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CoSb 3 -based skutterudite compounds are candidate materials for thermoelectric power generation in the mid-temperature range (600 -900 K) because their thermoelectric properties can be enhanced by doping and filling. The joining property of thermoelectric module electrodes containing thermoelectric materials is of great importance because it can dominate the efficiency of the thermoelectric module. This study examined the properties of CoSb 3 /Al/Ti/CuMo joined by the spark plasma sintering technique. Titanium thin foil was used to prevent the diffusion of copper into CoSb 3 and Aluminum thin foil was used to improve the adhesion between CoSb 3 and Ti. The insertion of an Aluminum interlayer between the Ti and CoSb 3 was effective for joining CoSb 3 to Ti by forming an intermediate layer at the Al-CoSb 3 boundary without any micro cracks. Specifically, the adhesion strength of the Ti/Al/ CoSb 3 joining interface showed a remarkable improvement compared with our previous results, without deterioration of electrical property in the interface.

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