摘要
利用区域熔化定向凝固的方法，研究了Al／Al2O3及Al－Si／Al2O3中颗粒在凝固界面的行为通过在Al－Si／Al2O3中添加微量元素，实现了颗粒被捕捉并在固相中均匀分布的状态.
The behavior of particles at solidification interface of Al/Al2O3 and Al-Si/Al2O3 composites was studied by using the zone-melting unidirectional solidification method. The particles were pushed by S/L interface in most of the composites, but the state of particle engulfment was realized by adding minute elements into an Al-Si/Al2O3 composite. An explanation model based on interfacial energies was proposed. If the contact angle between a solidification front and a particle is more than 90°, the particle can be engulfed into the solid. Otherwise the particle would be pushed.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
1998年第9期939-944,共6页
Acta Metallurgica Sinica
关键词
铝基
复合材料
凝固界面
颗粒分布
接触角
陶瓷
metal-matrix composite, solidification, particle distribution, contact angle
