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Stabilizing the metastable superhard material wurtzite boron nitride by three-dimensional networks of planar defects

文献类型：期刊论文

作者Chen, Chunlin1,2; Yin, Deqiang2,3; Kato, Takeharu; Taniguchi, Takashi4,5; Watanabe, Kenji5; Ma, Xiuliang1; Ye, Hengqiang1; Ikuhara, Yuichi2,4,6
刊名PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
出版日期2019-06-04
卷号116期号:23页码:11181-11186
关键词metastable phase superhard material planar defect electron microscopy
ISSN号0027-8424
DOI10.1073/pnas.1902820116
通讯作者Chen, Chunlin(clchen@imr.ac.cn) ; Ma, Xiuliang(xlma@imr.ac.cn) ; Ikuhara, Yuichi(ikuhara@sigma.t.u-tokyo.ac.jp)
英文摘要Wurtzite boron nitride (w-BN) is a metastable superhard material that is a high-pressure polymorph of BN. Clarifying how the metastable high-pressure material can be stabilized at atmospheric pressure is a challenging issue of fundamental scientific importance and promising technological value. Here, we fabricate millimeter-size w-BN bulk crystals via the hexagonal-to-wurtzite phase transformation at high pressure and high temperature. By combining transmission electron microscopy and ab initio molecular dynamics simulations, we reveal a stabilization mechanism for w-BN, i.e., the metastable high-pressure phase can be stabilized by 3D networks of planar defects which are constructed by a high density of intersecting (0001) stacking faults and {10 (1) over bar0} inversion domain boundaries. The 3D networks of planar defects segment the w-BN bulk crystal into numerous nanometer-size prismatic domains with the reverse crystallographic polarities. Our findings unambiguously demonstrate the retarding effect of crystal defects on the phase transformations of metastable materials, which is in contrast to the common knowledge that the crystal defects in materials will facilitate the occurrence of phase transformations.
资助项目Key Research Program of Frontier Sciences, Chinese Academy of Sciences[QYZDY-SSW-JSC027] ; Thousand Youth Talents Plan of China ; National Natural Science Foundation of China[51771200] ; Japan Society for the Promotion of Science[JP17H06094] ; Nanotechnology Platform of the Ministry of Education, Culture, Sports, Science, and Technology (MEXT)[12024046] ; Elemental Strategy Initiative ; Core Research for Evolutional Science and Technology of the Japan Science and Technology Agency[JPMJCR15F3]
WOS研究方向Science & Technology - Other Topics
语种英语
WOS记录号WOS:000470136000022
出版者NATL ACAD SCIENCES
资助机构Key Research Program of Frontier Sciences, Chinese Academy of Sciences ; Thousand Youth Talents Plan of China ; National Natural Science Foundation of China ; Japan Society for the Promotion of Science ; Nanotechnology Platform of the Ministry of Education, Culture, Sports, Science, and Technology (MEXT) ; Elemental Strategy Initiative ; Core Research for Evolutional Science and Technology of the Japan Science and Technology Agency
源URL[http://ir.imr.ac.cn/handle/321006/133707]  
专题金属研究所_中国科学院金属研究所
通讯作者Chen, Chunlin; Ma, Xiuliang; Ikuhara, Yuichi
作者单位1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China
2.Tohoku Univ, Adv Inst Mat Res, Sendai, Miyagi 9808577, Japan
3.Chongqing Univ, Coll Aerosp Engn, Chongqing 400044, Peoples R China
4.Japan Fine Ceram Ctr, Nanostruct Res Lab, Nagoya, Aichi 4568587, Japan
5.Natl Inst Mat Sci, Tsukuba, Ibaraki 3050044, Japan
6.Univ Tokyo, Inst Engn Innovat, Tokyo 1138656, Japan
推荐引用方式
GB/T 7714		 Chen, Chunlin,Yin, Deqiang,Kato, Takeharu,et al. Stabilizing the metastable superhard material wurtzite boron nitride by three-dimensional networks of planar defects[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2019,116(23):11181-11186.
APA Chen, Chunlin.,Yin, Deqiang.,Kato, Takeharu.,Taniguchi, Takashi.,Watanabe, Kenji.,...&Ikuhara, Yuichi.(2019).Stabilizing the metastable superhard material wurtzite boron nitride by three-dimensional networks of planar defects.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,116(23),11181-11186.
MLA Chen, Chunlin,et al."Stabilizing the metastable superhard material wurtzite boron nitride by three-dimensional networks of planar defects".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 116.23(2019):11181-11186.

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来源：金属研究所

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