کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1605079 | 1516208 | 2016 | 6 صفحه PDF | دانلود رایگان |
• A high removal rate of P in refined Si in Al-Si-P system is confirmed.
• An apparent segregation coefficient is introduced to characterize the process.
• P contents in primary Si controlled by thermodynamic factors are evaluated.
• Critical effect of kinetic factors on P removal at low temperature is confirmed.
To determine the effect of kinetics on P removal in Al-Si-P system, three sets of experiments with different solidification temperature ranges have been carried out. High P removal rates can be confirmed. An apparent segregation coefficient is introduced to characterize the P removal in this Al-Si-P system, which are determined to be 0.0207, 0.00822 and 0.00679, when the cooling rate is 0.556 mK·s−1 and the Si contents in the melt are 39.1, 29.3, 19.4 at.%, respectively. Theoretical P contents in the primary Si phase controlled by thermodynamic factor (X¯PinprimarySiT) and theoretical P contents in the primary Si phase controlled by kinetic factor (X¯PinprimarySiK) are calculated. The results reveal that the kinetic factors have critical influence on P removal at low solidification temperature.
Journal: Journal of Alloys and Compounds - Volume 685, 15 November 2016, Pages 604–609