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
	2005
发表期刊	Journal of Non-Crystalline Solids
ISSN	0022-3093
卷号	351 期号:19-20 页码:1696-1700
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.
部门归属	chinese acad sci, met res inst, shenyang natl lab mat sci, shenyang 110016, liaoning, peoples r china. warsaw univ technol, fac mat sci & engn, pl-02507 warsaw, poland.;sun, ws (reprint author), chinese acad sci, met res inst, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, liaoning, peoples r china;wssun@imr.ac.cn
关键词	Bulk Amorphous-alloys Metallic Glasses Transition Temperature Rapid Solidification Supercooled Liquid Undercooled Melts Forming Ability Crystal-growth Fe Crystallization
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WOS记录号	WOS:000229990500020
引用统计	被引频次：8[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/35049
专题	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.