2005 Volume 46 Issue 11 Pages 2541-2544
New Ce–Cu–Fe–Al–Si bulk metallic glasses (BMGs) with high glass formation ability (GFA) and large supercooled liquid regions (ΔTx, ΔTx=Tx–Tg) were developed. Investigation shows that the addition of Fe and Si elements is very effective to improve the glass formation ability of Ce-based BMGs. For an optimizing composition, the ΔTx value is 95 K and the alloy can be prepared into bulk metallic glass rods with the diameters of at least 10 mm. In the Ce–Cu–Al–Fe alloys, the glass transition temperature (Tg), crystallization temperature (Tx) and ΔTx increase with increasing Fe content. The reduced glass transition temperature (Trg=Tg⁄Tl) of the present BMG system is about 0.5–0.6 and is much lower than that of other metal base BMG systems with high GFA. Compressive fracture strength (σf) and Young’s modulus (E) of the Ce–Cu–Al–Fe BMGs are ∼930 MPa and ∼45 GPa, respectively, and increase with increasing Fe content.