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Mechanism of AlP modifying the morphology of Si in Al-20Si alloys based on experimental studies and first-principles calculations.
- Source :
-
International Journal of Cast Metals Research . Feb-Jun2023, Vol. 36 Issue 1-3, p56-64. 9p. - Publication Year :
- 2023
-
Abstract
- The modifying influence of aluminium phosphide to the morphology of primary Si and eutectic Si was investigated in hypereutectic Al-20Si alloys via adding Al-Cu-P master alloy (0.5, 1, 20 wt.%). Microstructural results showed when Al-Cu-P addition from 0 to 0.5%, primary Si phase decreases and eutectic Si phase size remains invariable; when addition higher than 0.5%, primary Si phase keeps invariable, eutectic Si phase size increases. To prove the nucleation effect of AlP on Si phase, interfacial properties of Si/AlP interface were investigated using first-principles calculations. Results showed the AlP(100)/Si(100) interface energy is between −1.45 J/m2 and −1.38 J/m2 for Al-terminated and P-terminated AlP model, both is much smaller than liquid Si/crystalline Si interface (0.34 J/m2), consolidates that AlP particles possess strong nucleation potency for Si phases. Therefore, the modifying influence of AlP to the morphology Si phase is well clarified as a function of AlP content in Al-20Si alloys. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 13640461
- Volume :
- 36
- Issue :
- 1-3
- Database :
- Academic Search Index
- Journal :
- International Journal of Cast Metals Research
- Publication Type :
- Academic Journal
- Accession number :
- 163764912
- Full Text :
- https://doi.org/10.1080/13640461.2023.2204041