Microstructure and thermal properties of recyclable Si_p/1199Al composites

• 作 者: 修子扬 陈国钦 杨文澍 宋美慧 武高辉
• 机 构: School of Materials Science and Engineering,Harbin Institute of Technology,
• 出 处: Transactions of Nonferrous Metals Society of China
• 发表日期: 2009年06期
• 关键词: clustering dense Annealing Maxwell annealed squeeze interfacial have fabrication

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.

The microstructure was observed and the thermal properties were tested and calculated by theoretical models. SIP / 1199 Al 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 · ° C)). 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 PG model are higher than those of experiment.