Effects of SiC and SiC-GNP additions on the mechanical properties and oxidation behavior of NbB                         2

Ipek Akin; Burak Cagri Ocak; Filiz Sahin; Gultekin Goller

doi:10.1080/21870764.2019.1595929

Effects of SiC and SiC-GNP additions on the mechanical properties and oxidation behavior of NbB ₂

Ipek Akin^*, Burak Cagri Ocak, 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

13 Citations (Scopus)

Abstract

Monolithic NbB ₂ , NbB ₂ -SiC, and NbB ₂ -SiC-GNP samples were produced by spark plasma sintering (SPS), and the effects of additives on the mechanical and thermal properties, microstructures, and oxidation behavior of the samples were investigated. The addition of SiC up to 30 vol% decreased the Vickers hardness of the binary composites due to microcrack formation. The fracture toughness and oxidation resistance of NbB ₂ were improved with the incorporation of SiC. Fracture toughness was higher for all the composites in comparison to monolithic NbB ₂ , moreover the highest value of ~5.2 MPa·m ^1/2 exhibited by 3 vol% GNP-containing composite. A strong interface and homogeneous distribution of GNPs enhanced the thermal transfer properties and improved the oxidation resistance of selected NbB ₂ -SiC ceramics in oxidation studies at 1200°C. A combination of high mechanical properties, high thermal conductivity, and low mass gain was achieved for the NbB ₂ -SiC-GNP samples with 1 and 3 vol% GNPs.

Original language	English
Pages (from-to)	170-182
Number of pages	13
Journal	Journal of Asian Ceramic Societies
Volume	7
Issue number	2
DOIs	https://doi.org/10.1080/21870764.2019.1595929
Publication status	Published - 3 Apr 2019

Bibliographical note

Publisher Copyright:
© 2019, © 2019 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group on behalf of The Korean Ceramic Society and The Ceramic Society of Japan.

Funding

This work was supported by the Türkiye Bilimsel ve Teknolojik Araştirma Kurumu [215M617]. Provision of financial support for this research by the Scientific and Technological Research Council of Turkey (TUBITAK) under project number 215M617 is gratefully acknowledged. The authors are also thankful to B. Yavas and H. Sezer for SPS experiments and microstructural investigations, respectively. This work was supported by the T?rkiye Bilimsel ve Teknolojik Ara?tirma Kurumu [215M617]. Provision of financial support for this research by the Scientific and Technological Research Council of Turkey (TUBITAK) under project number 215M617 is gratefully acknowledged. The authors are also thankful to B. Yavas and H. Sezer for SPS experiments and microstructural investigations, respectively.

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

Keywords

graphene
Niobium diboride
oxidation
sintering

Access to Document

10.1080/21870764.2019.1595929

Cite this

@article{e022935f82b34fadb6abbdb0c9ad9970,

title = " Effects of SiC and SiC-GNP additions on the mechanical properties and oxidation behavior of NbB 2 ",

abstract = " Monolithic NbB 2 , NbB 2 -SiC, and NbB 2 -SiC-GNP samples were produced by spark plasma sintering (SPS), and the effects of additives on the mechanical and thermal properties, microstructures, and oxidation behavior of the samples were investigated. The addition of SiC up to 30 vol% decreased the Vickers hardness of the binary composites due to microcrack formation. The fracture toughness and oxidation resistance of NbB 2 were improved with the incorporation of SiC. Fracture toughness was higher for all the composites in comparison to monolithic NbB 2 , moreover the highest value of ~5.2 MPa·m 1/2 exhibited by 3 vol% GNP-containing composite. A strong interface and homogeneous distribution of GNPs enhanced the thermal transfer properties and improved the oxidation resistance of selected NbB 2 -SiC ceramics in oxidation studies at 1200°C. A combination of high mechanical properties, high thermal conductivity, and low mass gain was achieved for the NbB 2 -SiC-GNP samples with 1 and 3 vol% GNPs.",

keywords = "graphene, Niobium diboride, oxidation, sintering",

author = "Ipek Akin and Ocak, {Burak Cagri} and Filiz Sahin and Gultekin Goller",

note = "Publisher Copyright: {\textcopyright} 2019, {\textcopyright} 2019 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group on behalf of The Korean Ceramic Society and The Ceramic Society of Japan.",

year = "2019",

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T1 - Effects of SiC and SiC-GNP additions on the mechanical properties and oxidation behavior of NbB 2

AU - Akin, Ipek

AU - Ocak, Burak Cagri

AU - Sahin, Filiz

AU - Goller, Gultekin

PY - 2019/4/3

Y1 - 2019/4/3

N2 - Monolithic NbB 2 , NbB 2 -SiC, and NbB 2 -SiC-GNP samples were produced by spark plasma sintering (SPS), and the effects of additives on the mechanical and thermal properties, microstructures, and oxidation behavior of the samples were investigated. The addition of SiC up to 30 vol% decreased the Vickers hardness of the binary composites due to microcrack formation. The fracture toughness and oxidation resistance of NbB 2 were improved with the incorporation of SiC. Fracture toughness was higher for all the composites in comparison to monolithic NbB 2 , moreover the highest value of ~5.2 MPa·m 1/2 exhibited by 3 vol% GNP-containing composite. A strong interface and homogeneous distribution of GNPs enhanced the thermal transfer properties and improved the oxidation resistance of selected NbB 2 -SiC ceramics in oxidation studies at 1200°C. A combination of high mechanical properties, high thermal conductivity, and low mass gain was achieved for the NbB 2 -SiC-GNP samples with 1 and 3 vol% GNPs.

AB - Monolithic NbB 2 , NbB 2 -SiC, and NbB 2 -SiC-GNP samples were produced by spark plasma sintering (SPS), and the effects of additives on the mechanical and thermal properties, microstructures, and oxidation behavior of the samples were investigated. The addition of SiC up to 30 vol% decreased the Vickers hardness of the binary composites due to microcrack formation. The fracture toughness and oxidation resistance of NbB 2 were improved with the incorporation of SiC. Fracture toughness was higher for all the composites in comparison to monolithic NbB 2 , moreover the highest value of ~5.2 MPa·m 1/2 exhibited by 3 vol% GNP-containing composite. A strong interface and homogeneous distribution of GNPs enhanced the thermal transfer properties and improved the oxidation resistance of selected NbB 2 -SiC ceramics in oxidation studies at 1200°C. A combination of high mechanical properties, high thermal conductivity, and low mass gain was achieved for the NbB 2 -SiC-GNP samples with 1 and 3 vol% GNPs.

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