Abstract
Inviscid melt-spun calcia-alumina fibre-reinforced aluminium-silicon alloy (4032) composites were produced using a melt-infiltration technique. Scanning electron microscopy, energy dispersive X-ray spectroscopy (EDS), and X-ray diffraction (XRD) were used to investigate interfacial wetting and interphase formation, and identify the crystalline phase of the interphase of these composites. The composites processed at 700°C showed a good interfacial wetting and silicon accumulation at the interface. The composites processed at 927°C showed formation of an interphase region of about 10–20 μm thick, as well as excellent interfacial wetting. EDS analysis gave averaged compositions of this interphase region at 74 wt % Al and 26 wt % Si, which corresponds to the composition of mullite (3Al2O3 · 2SiO2). The formation of mullite at the interface was confirmed by XRD analysis.
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Sung, YM., Yon, KY., Dunn, S.A. et al. Wetting behaviour and mullite formation at the interface of inviscid melt-spun CaO-Al2O3 fibre-reinforced Al-Si alloy (4032) composite. JOURNAL OF MATERIALS SCIENCE 29, 5583–5588 (1994). https://doi.org/10.1007/BF00349950
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DOI: https://doi.org/10.1007/BF00349950