Interface bonding nature and tensile behaviour of Ti2AlC(0001)/TiC(111) interface from first-principles calculation

Bibliographic Details
Title: Interface bonding nature and tensile behaviour of Ti2AlC(0001)/TiC(111) interface from first-principles calculation
Authors: Xin Pei, Meini Yuan, Pengfei Zhou, Wei Yang, Yang Wang, Lezhang Yin, Xiaosheng Zhou, Xingquan Shen
Source: Journal of Materials Research and Technology, Vol 33, Iss , Pp 9926-9939 (2024)
Publisher Information: Elsevier, 2024.
Publication Year: 2024
Collection: LCC:Mining engineering. Metallurgy
Subject Terms: Ti2AlC/TiC interface, First-principles calculation, Interface fracture toughness, Tensile properties, Fracture process, Mining engineering. Metallurgy, TN1-997
More Details: Using first principles, a systematic investigation of interface bonding nature and tensile behaviour of Ti2AlC(0001)/TiC(111) interface has been carried out at the atomic scale. The results show that Ti(Al)-on-top-C2 has the largest work of adhesion (13.1160 J/m2), the smallest interface energy (−2.6161 J/m2), and the largest interface fracture toughness (3.9660–4.9372 MPa⋅m1/2). Its interfacial bond is Ti–C covalent bond. And its tensile properties (critical strain of 12% and ideal tensile strength of 26.32 GPa) are second only to the best tensile properties (13% and 28.73 GPa). Except for Ti(Al)-fcc-hollow-Ti3, the fracture locations of seven interface models in the tensile simulation correspond to Griffith theory and work of interface separation. The inconsistency arises from the mutual repulsion of two Ti atoms in the Ti2–Ti3 bond in Ti(Al)-fcc-hollow-Ti3. And movement of C atoms on Ti2AlC bulk of C1–C2 bond changes stacking site from “hcp-hollow” to “on-top”, which leads to a decrease in stress of C-hcp-hollow-C2 before inflection point. The fracture process of the interface is summarized as follows: tiny electron holes form at lower strains, followed by electron microcrack as strain increases, and finally fracture failure due to the breakage of the chemical bond allowing the charge depletion region to form.
Document Type: article
File Description: electronic resource
Language: English
ISSN: 2238-7854
Relation: http://www.sciencedirect.com/science/article/pii/S2238785424028254; https://doaj.org/toc/2238-7854
DOI: 10.1016/j.jmrt.2024.12.022
Access URL: https://doaj.org/article/66159f93f0d0494b8b6683f4a3faf27f
Accession Number: edsdoj.66159f93f0d0494b8b6683f4a3faf27f
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  Data: Interface bonding nature and tensile behaviour of Ti2AlC(0001)/TiC(111) interface from first-principles calculation
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  Data: <searchLink fieldCode="AR" term="%22Xin+Pei%22">Xin Pei</searchLink><br /><searchLink fieldCode="AR" term="%22Meini+Yuan%22">Meini Yuan</searchLink><br /><searchLink fieldCode="AR" term="%22Pengfei+Zhou%22">Pengfei Zhou</searchLink><br /><searchLink fieldCode="AR" term="%22Wei+Yang%22">Wei Yang</searchLink><br /><searchLink fieldCode="AR" term="%22Yang+Wang%22">Yang Wang</searchLink><br /><searchLink fieldCode="AR" term="%22Lezhang+Yin%22">Lezhang Yin</searchLink><br /><searchLink fieldCode="AR" term="%22Xiaosheng+Zhou%22">Xiaosheng Zhou</searchLink><br /><searchLink fieldCode="AR" term="%22Xingquan+Shen%22">Xingquan Shen</searchLink>
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  Data: Journal of Materials Research and Technology, Vol 33, Iss , Pp 9926-9939 (2024)
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  Data: Using first principles, a systematic investigation of interface bonding nature and tensile behaviour of Ti2AlC(0001)/TiC(111) interface has been carried out at the atomic scale. The results show that Ti(Al)-on-top-C2 has the largest work of adhesion (13.1160 J/m2), the smallest interface energy (−2.6161 J/m2), and the largest interface fracture toughness (3.9660–4.9372 MPa⋅m1/2). Its interfacial bond is Ti–C covalent bond. And its tensile properties (critical strain of 12% and ideal tensile strength of 26.32 GPa) are second only to the best tensile properties (13% and 28.73 GPa). Except for Ti(Al)-fcc-hollow-Ti3, the fracture locations of seven interface models in the tensile simulation correspond to Griffith theory and work of interface separation. The inconsistency arises from the mutual repulsion of two Ti atoms in the Ti2–Ti3 bond in Ti(Al)-fcc-hollow-Ti3. And movement of C atoms on Ti2AlC bulk of C1–C2 bond changes stacking site from “hcp-hollow” to “on-top”, which leads to a decrease in stress of C-hcp-hollow-C2 before inflection point. The fracture process of the interface is summarized as follows: tiny electron holes form at lower strains, followed by electron microcrack as strain increases, and finally fracture failure due to the breakage of the chemical bond allowing the charge depletion region to form.
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        Value: 10.1016/j.jmrt.2024.12.022
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      – Text: English
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        PageCount: 14
        StartPage: 9926
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      – SubjectFull: Ti2AlC/TiC interface
        Type: general
      – SubjectFull: First-principles calculation
        Type: general
      – SubjectFull: Interface fracture toughness
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