Effects of Al substitution by Si in Ti3AlC2 nanolaminate

Abstract Recently, a series of high-purity Ti3(Al1−x Si x )C2 solid solutions with new compositions (x = 0.0, 0.2, 0.4, 0.6, 0.8 and 1.0) have been reported with interesting mechanical properties. Here, we have employed density functional theory for Ti3(Al1−x Si x )C2 solid solutions to calculate a...

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Autores principales:	M. A. Hadi, Md Roknuzzaman, M. T. Nasir, U. Monira, S. H. Naqib, A. Chroneos, A. K. M. A. Islam, Jose A. Alarco, Kostya (Ken) Ostrikov
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/8593b3520f964d8994b7781aa03d249e
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spelling	oai:doaj.org-article:8593b3520f964d8994b7781aa03d249e2021-12-02T12:09:51ZEffects of Al substitution by Si in Ti3AlC2 nanolaminate10.1038/s41598-021-81346-w2045-2322https://doaj.org/article/8593b3520f964d8994b7781aa03d249e2021-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-81346-whttps://doaj.org/toc/2045-2322Abstract Recently, a series of high-purity Ti3(Al1−x Si x )C2 solid solutions with new compositions (x = 0.0, 0.2, 0.4, 0.6, 0.8 and 1.0) have been reported with interesting mechanical properties. Here, we have employed density functional theory for Ti3(Al1−x Si x )C2 solid solutions to calculate a wider range of physical properties including structural, electronic, mechanical, thermal and optical. With the increase of x, a decrease of cell parameters is observed. All elastic constants and moduli increase with x. The Fermi level gradually increases, moving towards and past the upper bound of the pseudogap, when the value of x goes from zero to unity, indicating that the structural stability reduces gradually when the amount of Si increases within the Ti3(Al1−x Si x )C2 system. In view of Cauchy pressure, Pugh’s ratio and Poisson’s ratio all compositions of Ti3(Al1−x Si x )C2 are brittle in nature. Comparatively, low Debye temperature, lattice thermal conductivity and minimum thermal conductivity of Ti3AlC2 favor it to be a thermal barrier coating material. High melting temperatures implies that the solid solutions Ti3(Al1−x Si x )C2 may have potential applications in harsh environments. In the visible region (1.8–3.1 eV), the minimum reflectivity of all compositions for both polarizations is above 45%, which makes them potential coating materials for solar heating reduction.M. A. HadiMd RoknuzzamanM. T. NasirU. MoniraS. H. NaqibA. ChroneosA. K. M. A. IslamJose A. AlarcoKostya (Ken) OstrikovNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q M. A. Hadi Md Roknuzzaman M. T. Nasir U. Monira S. H. Naqib A. Chroneos A. K. M. A. Islam Jose A. Alarco Kostya (Ken) Ostrikov Effects of Al substitution by Si in Ti3AlC2 nanolaminate
description	Abstract Recently, a series of high-purity Ti3(Al1−x Si x )C2 solid solutions with new compositions (x = 0.0, 0.2, 0.4, 0.6, 0.8 and 1.0) have been reported with interesting mechanical properties. Here, we have employed density functional theory for Ti3(Al1−x Si x )C2 solid solutions to calculate a wider range of physical properties including structural, electronic, mechanical, thermal and optical. With the increase of x, a decrease of cell parameters is observed. All elastic constants and moduli increase with x. The Fermi level gradually increases, moving towards and past the upper bound of the pseudogap, when the value of x goes from zero to unity, indicating that the structural stability reduces gradually when the amount of Si increases within the Ti3(Al1−x Si x )C2 system. In view of Cauchy pressure, Pugh’s ratio and Poisson’s ratio all compositions of Ti3(Al1−x Si x )C2 are brittle in nature. Comparatively, low Debye temperature, lattice thermal conductivity and minimum thermal conductivity of Ti3AlC2 favor it to be a thermal barrier coating material. High melting temperatures implies that the solid solutions Ti3(Al1−x Si x )C2 may have potential applications in harsh environments. In the visible region (1.8–3.1 eV), the minimum reflectivity of all compositions for both polarizations is above 45%, which makes them potential coating materials for solar heating reduction.
format	article
author	M. A. Hadi Md Roknuzzaman M. T. Nasir U. Monira S. H. Naqib A. Chroneos A. K. M. A. Islam Jose A. Alarco Kostya (Ken) Ostrikov
author_facet	M. A. Hadi Md Roknuzzaman M. T. Nasir U. Monira S. H. Naqib A. Chroneos A. K. M. A. Islam Jose A. Alarco Kostya (Ken) Ostrikov
author_sort	M. A. Hadi
title	Effects of Al substitution by Si in Ti3AlC2 nanolaminate
title_short	Effects of Al substitution by Si in Ti3AlC2 nanolaminate
title_full	Effects of Al substitution by Si in Ti3AlC2 nanolaminate
title_fullStr	Effects of Al substitution by Si in Ti3AlC2 nanolaminate
title_full_unstemmed	Effects of Al substitution by Si in Ti3AlC2 nanolaminate
title_sort	effects of al substitution by si in ti3alc2 nanolaminate
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/8593b3520f964d8994b7781aa03d249e
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Effects of Al substitution by Si in Ti3AlC2 nanolaminate

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