Glass formation and sluggish nucleation: Growth in ternary eutectic Co-Hf-B system

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	Glass formation and sluggish nucleation: Growth in ternary eutectic Co-Hf-B system
	W. S. Sun ; H. F. Zhang ; Z. Q. Hu ; T. Kulik
刊名	Journal of Non-Crystalline Solids
	2005
卷号	351 期号:19-20 页码:1696-1700
关键词	bulk amorphous-alloys metallic glasses transition temperature rapid solidification supercooled liquid undercooled melts forming ability crystal-growth fe crystallization
ISSN号	0022-3093
中文摘要	Four rapidly quenched (RQ) ribbons of Co-Hf-B alloys with the ternary eutectic compositions were obtained by melt-spinning. The thermal stability and glass forming ability (GFA) were studied using high-temperature differential scanning calorimetry (DSC) measurements. Very high GFA was found for all the alloys studied, which are characterized by high values (above 0.64) of the reduced crystallization temperature (T-rx = T-x/T-m). The supercooled liquid region (Delta T-x = T-x - T-g = 45 K) was found for Co66Hf6.5B27.5 amorphous alloy with equilibrium microstructure composed of three intermetallic compounds (Co2B, Co21Hf2B6 and Co3HfB2). The high GFA was explained by the sluggish nucleation and slow growth of the complex structure intermetallic compounds in the ternary Co-Hf-B system. The Hf presence in the alloys studied plays an important role due to the slow diffusivity of relatively large atoms of this element. (c) 2005 Elsevier B.V. All rights reserved.
原文出处	://WOS:000229990500020
公开日期	2012-04-14
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/35049]
专题	金属研究所_中国科学院金属研究所
推荐引用方式 GB/T 7714	W. S. Sun,H. F. Zhang,Z. Q. Hu,et al. Glass formation and sluggish nucleation: Growth in ternary eutectic Co-Hf-B system[J]. Journal of Non-Crystalline Solids,2005,351(19-20):1696-1700.
APA	W. S. Sun,H. F. Zhang,Z. Q. Hu,&T. Kulik.(2005).Glass formation and sluggish nucleation: Growth in ternary eutectic Co-Hf-B system.Journal of Non-Crystalline Solids,351(19-20),1696-1700.
MLA	W. S. Sun,et al."Glass formation and sluggish nucleation: Growth in ternary eutectic Co-Hf-B system".Journal of Non-Crystalline Solids 351.19-20(2005):1696-1700.