亚稳态
退火(玻璃)
同步加速器
结晶学
材料科学
衍射
钻石
同步辐射
X射线晶体学
凝聚态物理
化学
光学
冶金
物理
有机化学
作者
Yoshifumi Ikoma,Terumasa Yamasaki,Takahiro Masuda,Yoshinori Tange,Yuji Higo,Yasuo Ohishi,Martha R. McCartney,David J. Smith,Zenji Horita
标识
DOI:10.1080/09500839.2021.1905192
摘要
In situ observation of a phase transformation during annealing of Si containing diamond-cubic (dc) and metastable phases has been performed using synchrotron X-ray diffraction. Metastable body-centred-cubic (bc8) and rhombohedral (r8) phases were formed by high-pressure torsion. These metastable phases gradually disappeared when increasing the annealing temperature to ∼ 180°C while another metastable phase having a hexagonal diamond (hd) structure appeared at ∼ 190°C. High-resolution transmission microscopy analysis revealed that hd and dc grains were present after annealing at 200°C. The results indicate that a phase transformation, mainly from bc8 to hd, occurred during annealing.
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