Comparative investigation of the properties of graphene nanoplatelet reinforced titanium diboride and niobium diboride ceramics

Ipek Akin; Burak Cagri Ocak; Melis Kaplan Akarsu; Onuralp Yucel; Filiz Sahin; Gultekin Goller

doi:10.1016/j.ijrmhm.2021.105761

Comparative investigation of the properties of graphene nanoplatelet reinforced titanium diboride and niobium diboride ceramics

Ipek Akin^*, Burak Cagri Ocak, Melis Kaplan Akarsu, Onuralp Yucel, Filiz Sahin, Gultekin Goller

^*Corresponding author for this work

Department of Metallurgical and Materials Engineering

Istanbul Technical University

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

2 Citations (Scopus)

Abstract

In this study, the effect of GNP concentration on the mechanical properties of spark plasma sintered TiB₂ and NbB₂ ceramics was investigated. GNP reinforced TiB₂ and NbB₂ specimens were aimed to produce with nearly full densification. Herein, SEM investigations, Raman analysis, and oxidation behavior of the samples were reported. GNP addition into the TiB₂ and NbB₂ matrices showed a different effect on various properties of the composites. GNP loading tends to enhance densification by removing native oxides of both TiB₂ and NbB₂ matrices. GNPs were more effective in the oxygen removal mechanism for TiB₂ composites than NbB₂. The highest relative density was obtained for TiB₂-GNP and NbB₂-GNP composites as 98.6% with 7 vol% and 5 vol% GNP additions, respectively. The Vickers microhardness decreased with increasing GNPs loading for both matrices. NbB₂-GNP composites possessed higher fracture toughness and better oxidation resistance than TiB₂-GNP composites.

Original language	English
Article number	105761
Journal	International Journal of Refractory Metals and Hard Materials
Volume	103
DOIs	https://doi.org/10.1016/j.ijrmhm.2021.105761
Publication status	Published - Feb 2022

Bibliographical note

Publisher Copyright:
© 2021

Funding

The work was supported by the Scientific and Technological Research Council of Turkey (TUBITAK) [grant number 215M617 ].

Funders	Funder number
TUBITAK	215M617
Türkiye Bilimsel ve Teknolojik Araştirma Kurumu

Keywords

Graphene
Niobium diboride
Oxidation
Spark plasma sintering
Titanium diboride

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10.1016/j.ijrmhm.2021.105761

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title = "Comparative investigation of the properties of graphene nanoplatelet reinforced titanium diboride and niobium diboride ceramics",

abstract = "In this study, the effect of GNP concentration on the mechanical properties of spark plasma sintered TiB2 and NbB2 ceramics was investigated. GNP reinforced TiB2 and NbB2 specimens were aimed to produce with nearly full densification. Herein, SEM investigations, Raman analysis, and oxidation behavior of the samples were reported. GNP addition into the TiB2 and NbB2 matrices showed a different effect on various properties of the composites. GNP loading tends to enhance densification by removing native oxides of both TiB2 and NbB2 matrices. GNPs were more effective in the oxygen removal mechanism for TiB2 composites than NbB2. The highest relative density was obtained for TiB2-GNP and NbB2-GNP composites as 98.6% with 7 vol% and 5 vol% GNP additions, respectively. The Vickers microhardness decreased with increasing GNPs loading for both matrices. NbB2-GNP composites possessed higher fracture toughness and better oxidation resistance than TiB2-GNP composites.",

keywords = "Graphene, Niobium diboride, Oxidation, Spark plasma sintering, Titanium diboride",

author = "Ipek Akin and Ocak, {Burak Cagri} and Akarsu, {Melis Kaplan} and Onuralp Yucel and Filiz Sahin and Gultekin Goller",

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doi = "10.1016/j.ijrmhm.2021.105761",

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AU - Akin, Ipek

AU - Ocak, Burak Cagri

AU - Akarsu, Melis Kaplan

AU - Yucel, Onuralp

AU - Sahin, Filiz

AU - Goller, Gultekin

PY - 2022/2

Y1 - 2022/2

N2 - In this study, the effect of GNP concentration on the mechanical properties of spark plasma sintered TiB2 and NbB2 ceramics was investigated. GNP reinforced TiB2 and NbB2 specimens were aimed to produce with nearly full densification. Herein, SEM investigations, Raman analysis, and oxidation behavior of the samples were reported. GNP addition into the TiB2 and NbB2 matrices showed a different effect on various properties of the composites. GNP loading tends to enhance densification by removing native oxides of both TiB2 and NbB2 matrices. GNPs were more effective in the oxygen removal mechanism for TiB2 composites than NbB2. The highest relative density was obtained for TiB2-GNP and NbB2-GNP composites as 98.6% with 7 vol% and 5 vol% GNP additions, respectively. The Vickers microhardness decreased with increasing GNPs loading for both matrices. NbB2-GNP composites possessed higher fracture toughness and better oxidation resistance than TiB2-GNP composites.

AB - In this study, the effect of GNP concentration on the mechanical properties of spark plasma sintered TiB2 and NbB2 ceramics was investigated. GNP reinforced TiB2 and NbB2 specimens were aimed to produce with nearly full densification. Herein, SEM investigations, Raman analysis, and oxidation behavior of the samples were reported. GNP addition into the TiB2 and NbB2 matrices showed a different effect on various properties of the composites. GNP loading tends to enhance densification by removing native oxides of both TiB2 and NbB2 matrices. GNPs were more effective in the oxygen removal mechanism for TiB2 composites than NbB2. The highest relative density was obtained for TiB2-GNP and NbB2-GNP composites as 98.6% with 7 vol% and 5 vol% GNP additions, respectively. The Vickers microhardness decreased with increasing GNPs loading for both matrices. NbB2-GNP composites possessed higher fracture toughness and better oxidation resistance than TiB2-GNP composites.

KW - Graphene

KW - Niobium diboride

KW - Oxidation

KW - Spark plasma sintering

KW - Titanium diboride

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DO - 10.1016/j.ijrmhm.2021.105761

M3 - Article

AN - SCOPUS:85121128708

SN - 0263-4368

VL - 103

JO - International Journal of Refractory Metals and Hard Materials

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ER -

Comparative investigation of the properties of graphene nanoplatelet reinforced titanium diboride and niobium diboride ceramics

Abstract

Bibliographical note

Funding

Keywords

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