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a b s t r a c tWe fabricated ternary CaeMgeZn and quaternary CaeMgeZneAg bulk metallic glasses with diameter of 7 mm by unidirectional quenching into water-cooled GaeIneSn liquid alloys. It was suggested that the electromagnetic stirring caused by induction eddy current facilitated the glass formation. Glass forming ability of Ca 62.5 Mg 17.5 Zn 20Àx Ag x (x ¼ 0, 1, 3, 5, 7, 9) system was dependent on Ag content. It was found that in the system the in-situ formed crystalline phases enhanced the second-stage crystallization, whereas there seemed no contribution to the third-stage crystallization.

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