| Autor: |
He, Jinjiang, Jia, Qian, Ding, Zhaochong, Wang, Xingquan, Cao, Xiaomeng, Cao, Ziqi, Gu, Xinfu |
| Předmět: |
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| Zdroj: |
Crystals (2073-4352); Feb2024, Vol. 14 Issue 2, p200, 12p |
| Abstrakt: |
Al-Sc alloys containing high Sc content are employed as sputtering targets for the fabrication of high-performance piezoelectric films during magnetic sputtering. Due to the high proportion of the Al3Sc phase, their workability is quite limited, and they are often used in the as-cast state. In this study, the crystallography of Al3Sc dendrites in as-casted Al-10at.%Sc and Al-20at.%Sc samples is examined using electron backscatter diffraction (EBSD). With increasing Sc content, the fraction of Al3Sc also increases. The Al3Sc dendrites exhibit a cubic relationship with the Al matrix in both alloys. However, in Al-10%Sc alloys, the facets of the Al3Sc dendrites are parallel to {001} planes, while twinning is observed in Al-20at.%. The twinning plane is parallel to the {111} plane, and the dendrite growth direction aligns with the <110> directions. The different morphologies of the dendrite structures in these two alloys are discussed in relation to thermodynamic and kinetic considerations based on the phase diagram and nucleation rate. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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