Effect of Ti addition on supercooled liquid region and glass forming ability of bulk amorphous Zr60Cu20Ni10-xAl10Tix alloys
来源期刊：中国有色金属学报(英文版)2003年第z1期
论文作者：XING Da-wei（邢大伟） SUN Jian-fei（孙剑飞） LIU Yu-qiang(刘玉强) WANG Gang（王 刚） YAN Ming（严 明） SHEN Jun（沈 军）
文章页码：68 - 70
Key words：bulk metallic glass; supercooled liquid; glass forming ability; wedge-shaped sample
Abstract: The effect of partial substitute of Ti for Ni in bulk metallic glass Zr60Cu20Ni10-xAl10Tix(x=1, 2, 3, 4, 5) is studied. The results show that the width of the supercooled liquid region ΔTx is enlarged when a small amount (1%-2%) of Ni is replaced by Ti , but minimized when the replacing amount is over 2%, due to the emergence of exothermic peaks at temperature lower than the previous Tx in DSC curves. Meanwhile, the reduced transition temperature Trg increases with increasing amount of Ti from 1% to 5% in the alloys. The relative glass forming ability shown by wedge-shaped samples of different Ti contents reveals the same trend with that of Trg. Therefore, it is implied from the above results that a large ΔTx (or a high thermal stability of supercooled liquid ) is not necessarily connected with a high glass forming ability.
XING Da-wei（邢大伟）, SUN Jian-fei（孙剑飞）,LIU Yu-qiang(刘玉强),WANG Gang（王 刚）, YAN Ming（严 明）, SHEN Jun（沈 军）
(School of Materials Science and Engineering,
Harbin Institute of Technology, Harbin 150001, China)
Abstract:The effect of partial substitute of Ti for Ni in bulk metallic glass Zr60Cu20Ni10-xAl10Tix(x=1, 2, 3, 4, 5) is studied. The results show that the width of the supercooled liquid region ΔTx is enlarged when a small amount (1%-2%) of Ni is replaced by Ti , but minimized when the replacing amount is over 2%, due to the emergence of exothermic peaks at temperature lower than the previous Tx in DSC curves. Meanwhile, the reduced transition temperature Trg increases with increasing amount of Ti from 1% to 5% in the alloys. The relative glass forming ability shown by wedge-shaped samples of different Ti contents reveals the same trend with that of Trg. Therefore, it is implied from the above results that a large ΔTx (or a high thermal stability of supercooled liquid ) is not necessarily connected with a high glass forming ability.
Key words:bulk metallic glass; supercooled liquid; glass forming ability; wedge-shaped sample
