Microstructure and thermal properties of recyclable Si_p/1199Al composites

Recyclable Sip/1199Al composites with high volume fraction of Si particles were fabricated by squeeze-casting method. The microstructure was observed and the thermal properties were tested and calculated by theoretical models.Sip/1199Al composites are all dense and macroscopically homogeneous without any particle clustering.The interface of Sip/1199Al is clean,smooth and free from any interfacial reaction products.Sip/1199Al composites have high thermal diffusivity(65.083 mm 2/s)and thermal conductivity (168.211 W/(m·℃)).The specific heat capacity of Sip/1199Al composites at constant pressure increases while the thermal diffusivity and thermal conductivity decrease with increasing temperature.Annealing treatment could improve the thermal properties.The results of Maxwell model and P.G.model are higher than those of experiment.

Recyclable Sip/1199A1 composites with high volume fraction of Si particles were fabricated by squeeze-casting method. The microstructure was observed and the thermal properties were tested and calculated by theoretical models. Sip/1199A1 composites are all dense and maeroscopically homogeneous without any particle clustering. The interface of Sip/1199A1 is clean, smooth and free from any interracial reaction products. Sip/1199A1 composites have high thermal diffusivity （65.083 mm^2/s） and thermal conductivity （168.211 W/（m·℃ ））. The specific heat capacity of Sip/1199A1 composites at constant pressure increases while the thermal diffusivity and thermal conductivity decrease with increasing temperature. Annealing treatment could improve the thermal properties. The results of Maxwell model and P.G. model are higher than those of experiment.