@article{176339ae7d114d4f85a5c0e5a33fa3c8,
title = "Synchrotron X-ray diffraction observation of phase transformation during annealing of Si processed by high-pressure torsion",
abstract = "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.",
keywords = "Severe plastic deformation, metastable phases, phase transformation, semiconductors, synchrotron radiation",
author = "Yoshifumi Ikoma and Terumasa Yamasaki and Takahiro Masuda and Yoshinori Tange and Yuji Higo and Yasuo Ohishi and McCartney, {Martha R.} and Smith, {David J.} and Zenji Horita",
note = "Funding Information: This work was supported by Grants-in-Aid for Scientific Research (S), (A), and (B) from the Japan Society for the Promotion of Science, Japan [JP26220909, JP19H00830, JP18H01384]. The HPT process was carried out in the International Research Center on Giant Straining for Advanced Materials at Kyushu University. The authors also acknowledge the use of facilities in the John M. Cowley Center for High Resolution Electron Microscopy at Arizona State University. The synchrotron radiation experiments were performed at the BL04B1 of SPring-8 with the approval of JASRI [2017A1851, 2017A1864, 2017A1972, 2017B1487, 2018A1451, 2018B1494, 2018B1697]. Publisher Copyright: {\textcopyright} 2021 Informa UK Limited, trading as Taylor & Francis Group.",
year = "2021",
doi = "10.1080/09500839.2021.1905192",
language = "English (US)",
volume = "101",
pages = "223--231",
journal = "Philosophical Magazine Letters",
issn = "0950-0839",
publisher = "Taylor and Francis Ltd.",
number = "6",
}