Micrometer-sized quasicrystals in the Al85Ni5Y6Co2Fe2 metallic glass: A TEM study and a brief discussion on the formability of quasicrystals in bulk and marginal glass-forming alloys

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	Micrometer-sized quasicrystals in the Al85Ni5Y6Co2Fe2 metallic glass: A TEM study and a brief discussion on the formability of quasicrystals in bulk and marginal glass-forming alloys
	M. Yan; J. Q. Wang; C. Kong; G. B. Schaffer; M. Qian
	2012
发表期刊	Journal of Materials Research
ISSN	0884-2914
卷号	27 期号:16 页码:2131-2139
摘要	Large quasicrystals up to similar to 10 mu m in size with a volume fraction of similar to 30% have been identified in a nitrogen gas-atomized marginal glass-forming alloy Al85Ni5Y6Co2Fe2 by detailed transmission electron microscopy. The formation of the large quasicrystal (Q) phase is discussed through the configuration of the valence electrons of its constituent elements, and the thermodynamic and kinetic factors associated with the solidification of this marginal glass-forming alloy during gas atomization. The finding leads to an important inference that marginal glass-forming alloys could be ideal systems for the formation of bulk quasicrystals under appropriate kinetic conditions. The Q phase is stable up to similar to 500 degrees C and decomposes thereafter. The activation energy for the decomposition of the Q phase is similar to the self-diffusion of Al. Two new intermetallic phases associated with the formation and decomposition of the Q phase have also been identified and characterized.
部门归属	[yan, m.; schaffer, g. b.; qian, m.] univ queensland, sch mech & min engn, arc ctr excellence design light met, ctr adv mat proc & mfg, brisbane, qld 4072, australia. [wang, j. q.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. [kong, c.] univ new s wales, electron microscopy unit, sydney, nsw 2052, australia.;yan, m (reprint author), univ queensland, sch mech & min engn, arc ctr excellence design light met, ctr adv mat proc & mfg, brisbane, qld 4072, australia.;m.yan2@uq.edu.au; ma.qian@uq.edu.au
关键词	Al-ni-fe Transmission Electron-microscopy Phase-formation Crystallization Behavior Thermal-stability Amorphous-alloys Decagonal Phase Cooling Rate Aluminum System
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文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/60384
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	M. Yan,J. Q. Wang,C. Kong,et al. Micrometer-sized quasicrystals in the Al85Ni5Y6Co2Fe2 metallic glass: A TEM study and a brief discussion on the formability of quasicrystals in bulk and marginal glass-forming alloys[J]. Journal of Materials Research,2012,27(16):2131-2139.
APA	M. Yan,J. Q. Wang,C. Kong,G. B. Schaffer,&M. Qian.(2012).Micrometer-sized quasicrystals in the Al85Ni5Y6Co2Fe2 metallic glass: A TEM study and a brief discussion on the formability of quasicrystals in bulk and marginal glass-forming alloys.Journal of Materials Research,27(16),2131-2139.
MLA	M. Yan,et al."Micrometer-sized quasicrystals in the Al85Ni5Y6Co2Fe2 metallic glass: A TEM study and a brief discussion on the formability of quasicrystals in bulk and marginal glass-forming alloys".Journal of Materials Research 27.16(2012):2131-2139.