Synchrotron X-ray diffraction observation of phase transformation during annealing of Si processed by high-pressure torsion

被引：11

作者：

Ikoma, Yoshifumi ^{[1
]}

Yamasaki, Terumasa ^{[1
]}

Masuda, Takahiro ^{[1
,2
]}

Tange, Yoshinori ^{[3
]}

Higo, Yuji ^{[3
]}

Ohishi, Yasuo ^{[3
]}

McCartney, Martha R. ^{[4
]}

Smith, David J. ^{[4
]}

Horita, Zenji ^{[1
,5
,6
,7
]}

机构：

[1] Kyushu Univ, Dept Mat Sci & Engn, Fukuoka 8190395, Japan

[2] Yokohama Natl Univ, Dept Mech Engn & Mat Sci, Yokohama, Kanagawa, Japan

[3] Japan Synchrotron Radiat Res Inst JASRI, Sayo, Hyogo, Japan

[4] Arizona State Univ, Dept Phys, Tempe, AZ 85287 USA

[5] Kyushu Inst Technol, Grad Sch Engn, Kitakyushu, Fukuoka, Japan

[6] Kumamoto Univ, Magnesium Res Ctr, Kumamoto, Japan

[7] Saga Univ, Synchrotron Light Applicat Ctr, Saga, Japan

来源：

PHILOSOPHICAL MAGAZINE LETTERS | 2021年 / 101卷 / 06期

基金：

日本学术振兴会;

关键词：

Severe plastic deformation; semiconductors; metastable phases; phase transformation; synchrotron radiation; PHOTOCATALYTIC PROPERTIES; NANOGRAINED SILICON; METASTABLE PHASES; TRANSITIONS; GERMANIUM;

D O I：

10.1080/09500839.2021.1905192

中图分类号：

T [工业技术];

学科分类号：

08 ;

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 similar to 180 degrees C while another metastable phase having a hexagonal diamond (hd) structure appeared at similar to 190 degrees C. High-resolution transmission microscopy analysis revealed that hd and dc grains were present after annealing at 200 degrees C. The results indicate that a phase transformation, mainly from bc8 to hd, occurred during annealing.

引用

页码：223 / 231

页数：9

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