High-performance bulk Ti-Cu-Ni-Sn-Ta nanocomposites based on a dendrite-eutectic microstructure

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	High-performance bulk Ti-Cu-Ni-Sn-Ta nanocomposites based on a dendrite-eutectic microstructure
	Q. L. Dai; B. B. Sun; M. L. Sui; G. He; Y. Li; J. Eckert; W. K. Luo; E. Ma
	2004
发表期刊	Journal of Materials Research
ISSN	0884-2914
卷号	19 期号:9 页码:2557-2566
摘要	Using a Ti-Cu-Ni-Sn-Ta alloy as an example, we demonstrate a strategy for the in situ formation of nanocomposite microstructures that can lead to simultaneous high strength and ductility. Our approach employs copper mold casting for the production of bulk alloys from the melt, and the solidification microstructure is designed to be composed of micrometer-sized ductile dendrites uniformly distributed inside a matrix of nanoscale eutectic reaction products. The nanostructured matrix is achieved at a relatively deep eutectic, which facilitates the formation of an ultrafine eutectic microstructure over a range of cooling rates. The multi-component recipe stabilizes a ductile solid solution as the toughening phase and helps to reduce the eutectic spacing down to nanoscale. The multi-phase microstructure (including phase distributions, morphologies, and interfaces) has been examined in detail using transmission electron microscopy (TEM) and high-resolution TEM. The metastable eutectic reaction and the nanoscale spacing achieved are explained using thermodynamic and solidification modeling. The benefits expected from the microstructure design are illustrated using the high strength and large plasticity observed in mechanical property tests. Our nanocomposite design strategy is expected to be applicable to many alloy systems and constitutes another example of tailoring the microstructure on nanoscale for extraordinary properties.
部门归属	chinese acad sci, met res inst, shenyang natl lab mat sci, shenyang 110016, peoples r china. natl inst mat sci, light mat grp, tsukuba, ibaraki 3050047, japan. natl univ singapore, dept mat sci, singapore 0511, singapore. tech univ darmstadt, div phys met, dept mat & geosci, d-64287 darmstadt, germany. johns hopkins univ, dept mat sci & engn, baltimore, md 21218 usa.;sui, ml (reprint author), chinese acad sci, met res inst, shenyang natl lab mat sci, shenyang 110016, peoples r china;mlsui@imr.ac.cn
关键词	Enhanced Plasticity Amorphous-alloys Cooling Rate Composite Solidification Powders Growth
URL	查看原文
WOS记录号	WOS:000223689000009
引用统计	被引频次：37[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/321006/35337
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Q. L. Dai,B. B. Sun,M. L. Sui,et al. High-performance bulk Ti-Cu-Ni-Sn-Ta nanocomposites based on a dendrite-eutectic microstructure[J]. Journal of Materials Research,2004,19(9):2557-2566.
APA	Q. L. Dai.,B. B. Sun.,M. L. Sui.,G. He.,Y. Li.,...&E. Ma.(2004).High-performance bulk Ti-Cu-Ni-Sn-Ta nanocomposites based on a dendrite-eutectic microstructure.Journal of Materials Research,19(9),2557-2566.
MLA	Q. L. Dai,et al."High-performance bulk Ti-Cu-Ni-Sn-Ta nanocomposites based on a dendrite-eutectic microstructure".Journal of Materials Research 19.9(2004):2557-2566.