Fracture toughness of VO2 microcrystals across metal-insulator transition

Divya Verma; Davinder Singh; Viswanath Balakrishnan

doi:10.1016/j.matlet.2022.132006

Fracture toughness of VO₂ microcrystals across metal-insulator transition

Divya Verma
, Davinder Singh
, Viswanath Balakrishnan

Indian Institute of Technology Mandi

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

Abstract

In this work, we report the fracture behavior of plate-shaped VO₂ microcrystals across metal–insulator transition with the aid of in-situ nanoindentation at 25 °C and 95 °C. The fracture toughness of VO₂ is found to be influenced by the thermal mismatch stress and transformation stress. The measured crack length generated from indentations is 40% lower after transition. The determined fracture toughness value for the monoclinic phase is 2.02 ± 0.07 MPa.m^1/2, while it is 2.67 ± 0.02 MPa.m^1/2 for the tetragonal phase.

Original language	English
Article number	132006
Journal	Materials Letters
Volume	315
DOIs	https://doi.org/10.1016/j.matlet.2022.132006
Publication status	Published - 15 May 2022

Keywords

Deformation and fracture
Nanoindentation
Phase transformation
Vanadium dioxide

Access to Document

10.1016/j.matlet.2022.132006

Cite this

@article{288ed4b7d51242afa62b535ab269eef5,

title = "Fracture toughness of VO2 microcrystals across metal-insulator transition",

abstract = "In this work, we report the fracture behavior of plate-shaped VO2 microcrystals across metal–insulator transition with the aid of in-situ nanoindentation at 25 °C and 95 °C. The fracture toughness of VO2 is found to be influenced by the thermal mismatch stress and transformation stress. The measured crack length generated from indentations is 40\% lower after transition. The determined fracture toughness value for the monoclinic phase is 2.02 ± 0.07 MPa.m1/2, while it is 2.67 ± 0.02 MPa.m1/2 for the tetragonal phase.",

keywords = "Deformation and fracture, Nanoindentation, Phase transformation, Vanadium dioxide",

author = "Divya Verma and Davinder Singh and Viswanath Balakrishnan",

note = "Publisher Copyright: {\textcopyright} 2022 Elsevier B.V.",

year = "2022",

month = may,

day = "15",

doi = "10.1016/j.matlet.2022.132006",

language = "English",

volume = "315",

journal = "Materials Letters",

issn = "0167-577X",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Fracture toughness of VO2 microcrystals across metal-insulator transition

AU - Verma, Divya

AU - Singh, Davinder

AU - Balakrishnan, Viswanath

PY - 2022/5/15

Y1 - 2022/5/15

N2 - In this work, we report the fracture behavior of plate-shaped VO2 microcrystals across metal–insulator transition with the aid of in-situ nanoindentation at 25 °C and 95 °C. The fracture toughness of VO2 is found to be influenced by the thermal mismatch stress and transformation stress. The measured crack length generated from indentations is 40% lower after transition. The determined fracture toughness value for the monoclinic phase is 2.02 ± 0.07 MPa.m1/2, while it is 2.67 ± 0.02 MPa.m1/2 for the tetragonal phase.

AB - In this work, we report the fracture behavior of plate-shaped VO2 microcrystals across metal–insulator transition with the aid of in-situ nanoindentation at 25 °C and 95 °C. The fracture toughness of VO2 is found to be influenced by the thermal mismatch stress and transformation stress. The measured crack length generated from indentations is 40% lower after transition. The determined fracture toughness value for the monoclinic phase is 2.02 ± 0.07 MPa.m1/2, while it is 2.67 ± 0.02 MPa.m1/2 for the tetragonal phase.

KW - Deformation and fracture

KW - Nanoindentation

KW - Phase transformation

KW - Vanadium dioxide

UR - https://www.scopus.com/pages/publications/85125675059

U2 - 10.1016/j.matlet.2022.132006

DO - 10.1016/j.matlet.2022.132006

M3 - Article

AN - SCOPUS:85125675059

SN - 0167-577X

VL - 315

JO - Materials Letters

JF - Materials Letters

M1 - 132006

ER -

Fracture toughness of VO₂ microcrystals across metal-insulator transition

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this