Real-time atomic-resolution observation of coherent twin boundary migration in CrN

Research output: Contribution to journal › Article › Research › peer-review

Standard

Real-time atomic-resolution observation of coherent twin boundary migration in CrN. / Chen, Zhuo; Zheng, Yong Hui; Löfler, Lukas et al.
In: Acta materialia, Vol. 208.2021, No. 15 April, 116732, 11.02.2021.

Research output: Contribution to journal › Article › Research › peer-review

Harvard

Chen, Z, Zheng, YH, Löfler, L, Bartosik, M, Sheng, H, Gammer, C, Holec, D & Zhang, Z 2021, 'Real-time atomic-resolution observation of coherent twin boundary migration in CrN', Acta materialia, vol. 208.2021, no. 15 April, 116732. https://doi.org/10.1016/j.actamat.2021.116732

APA

Chen, Z., Zheng, Y. H., Löfler, L., Bartosik, M., Sheng, H., Gammer, C., Holec, D., & Zhang, Z. (2021). Real-time atomic-resolution observation of coherent twin boundary migration in CrN. Acta materialia, 208.2021(15 April), Article 116732. https://doi.org/10.1016/j.actamat.2021.116732

Vancouver

Chen Z, Zheng YH, Löfler L, Bartosik M, Sheng H, Gammer C et al. Real-time atomic-resolution observation of coherent twin boundary migration in CrN. Acta materialia. 2021 Feb 11;208.2021(15 April):116732. doi: 10.1016/j.actamat.2021.116732

Author

Chen, Zhuo ; Zheng, Yong Hui ; Löfler, Lukas et al. / Real-time atomic-resolution observation of coherent twin boundary migration in CrN. In: Acta materialia. 2021 ; Vol. 208.2021, No. 15 April.

Bibtex - Download

@article{10656ad0d94b4c3a88305a20db2136d6,
title = "Real-time atomic-resolution observation of coherent twin boundary migration in CrN",
abstract = "Although coherent twin boundary (CTB) migration in fcc metals has been widely studied, little is known about the CTB migration behavior in the binary transition-metal nitrides system (e.g. rock-salt CrN). Using in-situ atomic-resolution electron microscopy, we report two different twin boundary defect (TD) nucleation and CTB migration modes at the CTB/ITB (incoherent twin boundary) and CTB/surface junctions. A new twin defect nucleation and CTB migration mode are observed from the CTB/surface junction. We show that such CTB migration is associated with a boundary structure alternating from an N-terminated to Cr-terminated, involving Cr and N atom respective motion, i.e., asynchronous CTB migration. We further reveal the dynamic and thermodynamic mechanism of such asynchronous migration through strain analysis and DFT simulations. Our findings uncover an atomic-scale dynamic process of defect nucleation and CTB migration in a binary system, which provides new insight into the atomic-scale deformation mechanism in complex materials.",
author = "Zhuo Chen and Zheng, {Yong Hui} and Lukas L{\"o}fler and Matthias Bartosik and Huaping Sheng and Christoph Gammer and David Holec and Zaoli Zhang",
year = "2021",
month = feb,
day = "11",
doi = "10.1016/j.actamat.2021.116732",
language = "English",
volume = "208.2021",
journal = "Acta materialia",
issn = "1359-6454",
publisher = "Elsevier",
number = "15 April",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - Real-time atomic-resolution observation of coherent twin boundary migration in CrN

AU - Chen, Zhuo

AU - Zheng, Yong Hui

AU - Löfler, Lukas

AU - Bartosik, Matthias

AU - Sheng, Huaping

AU - Gammer, Christoph

AU - Holec, David

AU - Zhang, Zaoli

PY - 2021/2/11

Y1 - 2021/2/11

N2 - Although coherent twin boundary (CTB) migration in fcc metals has been widely studied, little is known about the CTB migration behavior in the binary transition-metal nitrides system (e.g. rock-salt CrN). Using in-situ atomic-resolution electron microscopy, we report two different twin boundary defect (TD) nucleation and CTB migration modes at the CTB/ITB (incoherent twin boundary) and CTB/surface junctions. A new twin defect nucleation and CTB migration mode are observed from the CTB/surface junction. We show that such CTB migration is associated with a boundary structure alternating from an N-terminated to Cr-terminated, involving Cr and N atom respective motion, i.e., asynchronous CTB migration. We further reveal the dynamic and thermodynamic mechanism of such asynchronous migration through strain analysis and DFT simulations. Our findings uncover an atomic-scale dynamic process of defect nucleation and CTB migration in a binary system, which provides new insight into the atomic-scale deformation mechanism in complex materials.

AB - Although coherent twin boundary (CTB) migration in fcc metals has been widely studied, little is known about the CTB migration behavior in the binary transition-metal nitrides system (e.g. rock-salt CrN). Using in-situ atomic-resolution electron microscopy, we report two different twin boundary defect (TD) nucleation and CTB migration modes at the CTB/ITB (incoherent twin boundary) and CTB/surface junctions. A new twin defect nucleation and CTB migration mode are observed from the CTB/surface junction. We show that such CTB migration is associated with a boundary structure alternating from an N-terminated to Cr-terminated, involving Cr and N atom respective motion, i.e., asynchronous CTB migration. We further reveal the dynamic and thermodynamic mechanism of such asynchronous migration through strain analysis and DFT simulations. Our findings uncover an atomic-scale dynamic process of defect nucleation and CTB migration in a binary system, which provides new insight into the atomic-scale deformation mechanism in complex materials.

UR - http://www.scopus.com/inward/record.url?scp=85101764213&partnerID=8YFLogxK

U2 - 10.1016/j.actamat.2021.116732

DO - 10.1016/j.actamat.2021.116732

M3 - Article

VL - 208.2021

JO - Acta materialia

JF - Acta materialia

SN - 1359-6454

IS - 15 April

M1 - 116732

ER -

View graph of relations

SFX

Publication SFX

By the same authors

View more