Results 31 to 40 of about 20,648 (237)

Rayleigh Waves Propagating in the Functionally Graded One-Dimensional Hexagonal Quasicrystal Half-Space

Crystals, 2023
For the manufacturing and optimization of quasicrystal structures, Rayleigh waves propagating in the functionally graded one-dimensional hexagonal quasicrystal half-space are investigated.
Bo Zhang, Honghang Tu, Liangjuan Li, Jiangong Yu, Jun Dai   +4 more
doaj   +1 more source

Entropic formation of a thermodynamically stable colloidal quasicrystal with negligible phason strain

Proceedings of the National Academy of Sciences of the United States of America, 2021
Significance Quasicrystals––ordered crystals lacking translational periodicity––occur in systems comprising building blocks ranging from atoms to nanoparticles.
Kwanghwi Je, Sangmin Lee, E. Teich, M. Engel, S. Glotzer   +4 more
semanticscholar   +1 more source

Influence of cerium content on the microstructure and thermal expansion properties of suction cast Al-Cu-Fe alloys

Royal Society Open Science, 2021
Low-expansion alloys are of great importance and can be used for the development of new aerospace materials. Herein, we report diverse rare earth quasicrystal alloys fabricated by the vacuum suction casting process. The effects of the addition of cerium (
Juan Wang, Zhong Yang, Zhijun Ma, Yaping Bai, Hongbo Duan, Dong Tao, Guoqing Shi, Jiachen Zhang, Zhen Wang, Jianping Li   +9 more
doaj   +1 more source

Analysis alloy quasicrystalline Al62,2 Cu25,3 Fe12,5 for steam reforming of methanol

Semina: Ciências Exatas e Tecnológicas, 2015
This study shows a good performance of quasicrystal Al62,2Cu25,3Fe12,5 as catalyst in catalytic reactions. This metal catalyst, without being leached with acid or base, with dry stoichiometric composition, Al62,2Cu25,3Fe12,5 is revealed among the ...
Lourdes Cristina Lucena Agostinho Jamshidi, Luciano Nascimento, Celmy Maria B. de Menezes Barbosa, Reza Jamshidi Rodbari   +3 more
doaj   +1 more source

Anomalous upper critical field in the quasicrystal superconductor Ta_1.6Te [PDF]

npj Quantum Materials
Superconductivity in quasicrystals poses a new challenge in condensed matter physics. We measured the resistance and ac magnetic susceptibility of a Ta_1.6Te dodecagonal quasicrystal, which is superconducting below T _ c  ~ 1 K.
Taichi Terashima, Yukihiro Tokumoto, Kotaro Hamano, T. Konoike, Naoki Kikugawa, Keiichi Edagawa   +5 more
semanticscholar   +1 more source

Layer-dependent topological phase in a two-dimensional quasicrystal and approximant [PDF]

Proceedings of the National Academy of Sciences of the United States of America, 2020
Significance The behavior of electrons in solids is intimately related to symmetry and dimensionality, and it is the interaction of these two that dictates the topological properties of materials.
Jeffrey D. Cain, A. Azizi, M. Conrad, S. Griffin, A. Zettl   +4 more
semanticscholar   +1 more source

Quasicrystals

Journal of Research of the National Institute of Standards and Technology, 2001
The discretely diffracting aperiodic crystals termed quasicrystals, discovered at NBS in the early 1980s, have led to much interdisciplinary activity involving mainly materials science, physics, mathematics, and crystallography. It led to a new understanding of how atoms can arrange themselves, the role of periodicity in nature, and has created a new ...
openaire   +3 more sources

Microstructure and Nanoindentation Behavior of Ti₄₀Zr₄₀Ni₂₀ Quasicrystal Alloy by Casting and Rapid Solidification

Metals, 2021
A Ti40Zr40Ni20 quasicrystal (QCs) rod and ribbons were prepared by conventional casting and rapid solidification. The X-ray diffractometry (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and differential scanning ...
Junli Hou, Zhong Yang, Hongbo Duan, Yiyi Feng, Yongchun Guo, Jianping Li   +5 more
doaj   +1 more source

Dodecagonal bilayer graphene quasicrystal and its approximants [PDF]

npj Computational Materials, 2019
Dodecagonal bilayer graphene quasicrystal has 12-fold rotational order but lacks translational symmetry which prevents the application of band theory. In this paper, we study the electronic and optical properties of graphene quasicrystal with large-scale
G. Yu, Zewen Wu, Z. Zhan, M. Katsnelson, S. Yuan   +4 more
semanticscholar   +1 more source

Topological Photonic Quasicrystals: Fractal Topological Spectrum and Protected Transport

Physical Review X, 2016
We show that it is possible to have a topological phase in two-dimensional quasicrystals without any magnetic field applied, but instead introducing an artificial gauge field via dynamic modulation.
Miguel A. Bandres, Mikael C. Rechtsman, Mordechai Segev   +2 more
doaj   +1 more source