부산대학교 도서관

The current study investigates the thermo-physical properties of the Mg-based hybrid composite produced via hot press sintering. The Al2O3Al2O3Al2O3Al2O3 SiC and Al2O3 particulates were selected as reinforcement in the Mg matrix. The volume fraction of the matrix and the reinforcements is kept constant at 40:60. However, by varying the volume fraction ratio of SiC and Al2O3 five different composites were prepared, designated as Mg–10SiC50Al2O3, Mg–20SiC40Al2O3, Mg–30SiC30Al2O3, Mg–40SiC20Al2O3 and Mg–50SiC10Al2O3. The effect of SiC and Al2O3 reinforcement on thermal conductivity, specific heat capacity and density were evaluated. XRD analysis determined the formation of intermittent phases like Mg2Si and MgO in the Mg matrix composite, whereas SEM analysis confirmed an almost uniform distribution of the reinforcements in the Mg matrix. Among the developed composites, the highest thermal conductivity of 193.42 W/mK (for Mg–50SiC10Al2O3) and highest specific heat of 4.68 kJ/kg°C (for Mg–30SiC30Al2O3) were observed along with the relative density of 85–77%. The properties achieved by the developed composites are found to be aligned with the requirement of third-generation solar energy storage materials and could be used for thermal storage usage such as solar thermal applications.