Characterization of the icosahedral quasicrystalline phase in rapidly solidified Al–Cu–Fe alloys

2008 ◽  
Vol 223 (11-12) ◽  
Author(s):  
Baris Avar ◽  
Musa Gogebakan ◽  
Fikret Yilmaz

2020 ◽  
Vol 21 (2) ◽  
pp. 260-265
Author(s):  
Yu. V. Syrovatko ◽  
O. O. Levkovich

The paper deals with the calculations of heat capacity of quasicrystalline decagonal Al69Co21Ni10 and icosahedral Al63Cu25Fe12 quasicrystalline phases of Al–Co–Ni and Al–Cu–Fe alloys, respectively. According to the Gruneisen law, heat capacity is an energy characteristic, which reflects the phases’ resistance to failure. For calculations of the heat capacity, structure of quasicrystalline phases is considered in the model representation of anisotropic crystals. As a result, it is found that the heat capacity of quasicrystalline phases at high temperatures is the excessive one, i.e. it exceeds the Dulong-Petit value. Therefore, quasicrystalline phases at high temperatures are more stable, than the crystalline phase. For the decagonal quasicrystalline phase, heat capacity is more than 3R in the temperature range of ~480–1500 К, and for the icosahedral quasicrystalline phase – in the temperature range of ~380–1120 К. It follows that decagonal phases remain stable at high temperatures at which the icosahedral phases are destroyed.





2015 ◽  
Vol 29 (1) ◽  
pp. 28-31
Author(s):  
Hui-Jun Kang ◽  
Zhong-Lue Hu ◽  
Xiao-Xia Gao ◽  
Zong-Ning Chen ◽  
Yi-Ping Lu ◽  
...  




2000 ◽  
Vol 42 (12) ◽  
pp. 2177-2183 ◽  
Author(s):  
M. N. Mikheeva ◽  
G. Kh. Panova ◽  
A. A. Teplov ◽  
M. N. Khlopkin ◽  
N. A. Chernoplekov ◽  
...  


2001 ◽  
Vol 42 (8) ◽  
pp. 1493-1496 ◽  
Author(s):  
Junji Saida ◽  
Mitsuhide Matsushita ◽  
Akihisa Inoue




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