界面反应对铝熔体与Si_3N_4多孔陶瓷界面的润湿作用  

Research on Wetting Effectiveness of Interface Reaction between Al Melt and Porous Si_3N_4

作　　者：王扬卫[1] 于晓东[1] 王富耻[1] 马壮[1] 王璀轶[1] 

机构地区：[1]北京理工大学材料科学与工程学院,北京100081

出　　处：《稀有金属材料与工程》2007年第A01期727-730,共4页Rare Metal Materials and Engineering

摘　　要：应用界面润湿理论从热力学角度计算了铝熔体和Si3N4陶瓷存在界面反应时的润湿角;通过测量不同浸渗时间下浸渗厚度,结合浸渗动力学模型,获得实际浸渗过程中铝合金熔体与Si3N4多孔预制体之间润湿角,并将该试验结果与上述理论计算结果相比较。研究表明:Al/Si3N4界面反应过程对熔体与预制体的润湿起到重要作用;应用界面润湿理论计算得到T=1223K(950℃)时,Al/Si3N4界面实际接触角θ值为60.2o,界面反应对界面接触角的贡献达到47.6o,计算结果与浸渗动力学试验吻合。By employing interface wetting theory, the wetting angle between Al melt and porous Si3N4 was calculated based on thermodynamic method. And infiltration kinetics curves were obtained by pressureless infiltration experiments, and then combining the infiltration kinetics model, the actual wetting angle between Al melt and porous Si3N4 was achieved, and the two wetting angles were compared. It is shown that Al / Si3N4 interface reaction perform a significant role on the wetting between Al melt and porous Si3N4. On the basis of interface wetting theory, the actual contact angle θ is 60.2° when T is 1223 K （950℃）, and the contribution of interface reaction on the θ is 47.6°. Such results are consistent with relevant kinetics experiments.

关 键 词：无压浸渗 复合材料 SI3N4 界面反应 反应润湿 

分 类 号：TB383.4[一般工业技术—材料科学与工程]