Abstract
A ternary Al-8Si-5.1Cu (in wt.%) alloy was rapidly quenched from the melt at cooling rates between 106 and 107 K/s using the melt-spinning technique. The resulting ribbons were characterized using optical microscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and microhardness techniques. On the basis of the Al peak shifts measured in the XRD scans, a solid solubility extension value of 3.83 at.% Si in Al was determined. Whereas SEM investigations showed the presence of dendrites rich in Al, TEM investigations revealed nanosized spherically shaped Si crystals 20-25 nm in size. Both XRD and TEM investigations confirmed the absence of any intermetallic phase formation. The microhardness value of the melt-spun alloy was measured as 201 kg/mm2.
Original language | English |
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Pages (from-to) | 3296-3301 |
Number of pages | 6 |
Journal | Materials Letters |
Volume | 57 |
Issue number | 21 |
DOIs | |
Publication status | Published - Jul 2003 |
Keywords
- Alloys
- Characterisation methods
- Melt-spinning
- Metals
- Microstructure
- Solidification
- Ternary Al-Si-Cu alloy