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Published August 23, 1999 | public
Journal Article Open

Large supercooled liquid region and phase separation in the Zr–Ti–Ni–Cu–Be bulk metallic glasses


Results of calorimetric, differential thermal analysis, and structural measurements are presented for a series of bulk metallic glass forming compositions in the Zr-Ti-Cu-Ni-Be alloy system. The calorimetric data for five alloys, prepared along the tie line between phase separating and nonphase separating compositions, show that the transition from phase separating to nonphase separating behavior is smooth. The bulk glasses near the center of the tie line exhibit large supercooled liquid regions: Delta T approximate to 135 K, the largest known for a bulk metallic glass.

Additional Information

©1999 American Institute of Physics. Received 30 April 1999; accepted 29 June 1999. The authors would like to acknowledge the support of the U.S. Department of Energy (Grant No. DEFG-03-86ER45242). One of us (C. C. Hays) would like to acknowledge fruitful discussions with Ulrich Geyer and T. A. Waniuk during the preparation of this manuscript. The authors would also like to thank John Haygarth of Teledyne Wah-Chang Inc. for providing the crystal bar Ti and Zr used in the preparation of these alloys.


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