摘要
利用差示扫描量热仪(DSC)、电子显微镜等设备对Al-12.8%Si合金粉末的原始状态及热处理后的状态进行了分析。发现其显微组织有两个连续的变化过程:在156℃时,固溶在基体Al中的过饱和Si开始析出,并在340℃发生粗化,随着加热温度的升高,粗化现象仍然存在。另外,对Si颗粒的粗化机理进行了研究,发现其粗化符合经典的LSW理论。
The powders of Al-12.8%Si alloy were studied by differential scanning calorimetry and electron microscope. Two successive types of microstructure development were found to appear in different temperatures. In 156 ℃ the supersaturated Si was decomposed from the primary AI, and structural coarsening of Si particles in 340 ℃ .The coarsening behavior was still existed when the heating temperature being elevated. Otherwise, the coarsening mechanism was studied and proved to be according with the classical LSW theory.
出处
《铸造》
EI
CAS
CSCD
北大核心
2007年第1期65-67,共3页
Foundry
关键词
快速凝固
Al-Si合金粉末
Si颗粒的粗化
rapidly solidification
powders of AI-Si alloys
coarsening beha
of Si particles
