Icosahedral quasicrystal in annealed ZnMgSc alloys

Kaneko, Yasushi; Arichika, Yasuomi; Ishimasa, Tsutomu

doi:10.1080/09500830110084984

Cited by 97 publications

(98 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We examined a few possibilities of local atomic structure and chemical composition in the 1/1-phase based on the HAADF image, and found that the structure shown in Fig. 5 10) whereas Au/Al ratio of mixed sites in the model is slightly different from that in the Au 51 Al 35 Yb 14 . To confirm the validity of the model, a HAADF simulation was performed using the model, and the result is shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Formation of an Icosahedral Quasicrystal and Its Approximant in Au-Al-Sc System

Kimoto²,

Edagawa

2015

Mater. Trans.

View full text Add to dashboard Cite

The formation of the icosahedral (i-) and 1/1-approximant (1/1-) phases in the Au-Al-Sc system has been investigated. A primitive-type i-phase was found to form in an Au 45 Al 40 Sc 15 alloy. This i-phase was shown to be thermodynamically stable at 973 K. A stable 1/1-phase was found to form at 1173 K for compositions of Au 44+x Al 41¹x Sc 15 (x = 0, 1, 2, 3). High-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) revealed that the 1/1-phase consists of Tsai-type icosahedral clusters. Similar local structures were observed in the HAADF-STEM image for the i-phase, indicating that the i-phase consists of Tsai-type clusters identical to the clusters in the 1/1-phase. The composition of the Au-Al-Sc i-phase is consistent with the formation conditions, including those in the valence electrons per atom ratio and in the atomic size factor, which has been shown previously for other Tsai-type i-phases. This fact demonstrates the importance of these conditions for stabilization of Tsai-type i-phases.

show abstract

Section: Resultsmentioning

confidence: 99%

Formation of an Icosahedral Quasicrystal and Its Approximant in Au-Al-Sc System

Kimoto²,

Edagawa

2015

Mater. Trans.

View full text Add to dashboard Cite

show abstract

“…Al-based alloys (Shechtman et al, 1984;Chattopadhyay et al, 1985) and later in other binary Al-TM-based alloys containing Cr (Inoue et al, 1987),V (Inoue et al, 1986,and different ternary alloys (Rabe et al, 1991;Kelton, 1995).Additionally, the icosahedral phase was observed in Ga-, Ti-, Mg-, and Pd-based alloys (Louzguine-Luzgin et al, 2008) as well as in Cd- (Guo et al, 2000), are-earth (RE)- (Fisher et al, 2000), and Zn-based (Kaneko et al, 2001) alloys.…”

mentioning

confidence: 99%

Hydrogen Energy in India: Storage to Application

Awasthi¹,

Shahi²,

Srivastava³

et al. 2015

Proceedings of the Indian National Science Academy

View full text Add to dashboard Cite

It is well-known that the evolution of society is guided by several environmental strains. One of the important strains existing at this point of time is climate change due to pollution. Other issue of paramount importance is "energy". One of the comparatively new energy vectors which is typically suited for India is "hydrogen". Hydrogen is an indigeneous fuel since it can be produced by dissociating water with a variety of input energies, out of which solar energy is of particular importance. India has both of these in plenty. Hydrogen produced from water burns back to water after use. It is thus climate-friendly, inexhaustible, clean and indigenous fuel. Hydrogen must first be produced, afterwards stored, and then used, particularly in vehicular transport. Hydrogen storage is the crucial issue of hydrogen economy, cutting across production, distribution and applications. Finding efficient materials capable of storing hydrogen with high gravimetric and volumetric efficiencies is the central issue for harnessing hydrogen to replace fossil fuel oil (petroleum). We have brought out the relevance of hydrogen, particularly its storage aspect. The study then focuses on various aspects of hydrogen storage materials. The article describes some hydrogen-fuelled devices with particular emphasis on vehicular transport (three-wheelers and small cars).

show abstract

“…Later the icosahedral phase was observed in other Al-, Ga-, Ti-, Mg-and Pd-based alloys [8] as well as Cd- [9], Rare Earth- [10], Zn-based [11] alloys. The icosahedral phase has been also produced in NM-free Zrbased glassy alloys as a result of oxygen contamination [12] at more than 1700 mass ppm of O content as well as a result of NM additions at low oxygen content of about 800 mass ppm [13].…”

Section: Introductionmentioning

confidence: 99%