Institute of Industrial Science, The University of Tokyo, Komaba, Meguro-ku, Tokyo 153-8505, Japan.
Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan.
Phys Rev Lett. 2015 Aug 14;115(7):075501. doi: 10.1103/PhysRevLett.115.075501. Epub 2015 Aug 10.
The growth of an Al-Ni-Co decagonal quasicrystal was observed by in situ, high-temperature, high-resolution transmission electron microscopy. The tiling patterns extracted from a series of high-resolution transmission electron microscopy images were analyzed on the basis of the high-dimensional description of quasicrystalline structures. The analyses indicated that the growth proceeded with frequent error-and-repair processes. The final, grown structure showed nearly perfect quasicrystalline order. Our observations suggest that the repair process by phason relaxation, rather than local growth rule, plays an essential role in the construction of ideal quasicrystalline order in real materials.
通过原位、高温、高分辨率透射电子显微镜观察到了 Al-Ni-Co 十次准晶的生长。从一系列高分辨率透射电子显微镜图像中提取的平铺图案基于准晶结构的高维描述进行了分析。分析表明，生长过程伴随着频繁的错误-修复过程。最终生长的结构显示出几乎完美的准晶有序性。我们的观察结果表明，通过位错弛豫而不是局部生长规律的修复过程在实际材料中理想准晶序的构建中起着至关重要的作用。
