Thermal stability of mechanically alloyed boride/Ti(50)Cu(18)Ni(22)Al(4)Sn(6) glassy alloy composites

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	Thermal stability of mechanically alloyed boride/Ti(50)Cu(18)Ni(22)Al(4)Sn(6) glassy alloy composites
	L. C. Zhang; Z. Q. Shen; J. Xu
	2005
发表期刊	Journal of Non-Crystalline Solids
ISSN	0022-3093
卷号	351 期号:27-29 页码:2277-2286
摘要	The Ti(50)Cu(18)Ni(22)Al(4)Sn(6) multicomponent alloy was chosen as base alloy due to a complete glass formation under ball milling and a sizable supercooled liquid region, Delta T(x) = 66 K. The mixtures of prealloyed Ti(50)Cu(18)Ni(22)Al(4)Sn(6) fragments with CrB or TiB(2) particles up to 30 vol.% were mechanically milled to fabricate the boride/Ti-based glassy alloy composites. The structural features of the as-milled products were characterized using X-ray diffraction, transmission electron microscopy and differential scanning calorimetry. In the ball-milled composites, the CrB or TiB2 particles with sizes ranging around 10-200 nm are dispersed in the Ti-based glassy alloy matrix. Similar to the Ti(50)Cu(18)Ni(22)Al(4)Sn(6) glassy alloy without any borides, a well-defined glass transition temperature, T(g), and a wide supercooled liquid region, Delta T(x) are observed also for the boride-containing composites. Furthermore, the glass transition and thermal stability of supercooled liquid for the matrix alloy in the composites are dependent on the fraction of boride addition. In the case of CrB addition, the Delta T(x), value of glassy phase matrix was reduced due to a strong fraction dependence of the Tg than that of the T(x), remaining at about 60 K for boride fractions less than 15 vol.%. In contrast, both the T(g) and T(x) of the TiB(2)-containing composites were raised with increasing TiB(2) fraction up to 30 vol.%, resulting in no significant change for the AT,. (c) 2005 Elsevier B.V. All rights reserved.
部门归属	cas, met res inst, shenyang natl lab mat sci, shenyang 110016, peoples r china.;xu, j (reprint author), cas, met res inst, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china;jianxu@imr.ac.en
关键词	Bulk Metallic-glass Supercooled Liquid Region Gas-atomized Powders Channel Angular Extrusion Al-cu-ni Matrix Composites Amorphous-alloys Warm Extrusion Zrc Particles High-strength
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文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/35216
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	L. C. Zhang,Z. Q. Shen,J. Xu. Thermal stability of mechanically alloyed boride/Ti(50)Cu(18)Ni(22)Al(4)Sn(6) glassy alloy composites[J]. Journal of Non-Crystalline Solids,2005,351(27-29):2277-2286.
APA	L. C. Zhang,Z. Q. Shen,&J. Xu.(2005).Thermal stability of mechanically alloyed boride/Ti(50)Cu(18)Ni(22)Al(4)Sn(6) glassy alloy composites.Journal of Non-Crystalline Solids,351(27-29),2277-2286.
MLA	L. C. Zhang,et al."Thermal stability of mechanically alloyed boride/Ti(50)Cu(18)Ni(22)Al(4)Sn(6) glassy alloy composites".Journal of Non-Crystalline Solids 351.27-29(2005):2277-2286.