Effect of ZrB2 Powders on Densification, Microstructure, Mechanical Properties and Thermal Conductivity of ZrB2-SiC Ceramics

Jin-Hao Yuan, Qiu-Yu Liu, Yang You, Ling-Yong Zeng, Mingwen Bai, Lewis R. Blackburn, Wei-Ming Guo, Hua-Tay Lin

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    22 Citations (Scopus)
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    Abstract

    With the view to improve the densification behaviour and mechanical properties of ZrB 2-SiC ceramics, three synthesis routes were investigated for the production of ZrB 2, prior to the fabrication of ZrB 2-20 vol. % SiC via spark plasma sintering (SPS). Two borothermal reduction routes, modified with a water-washing stage (BRW) and partial solid solution of Ti (BRS), were utilised, alongside a boro/carbothermal mechanism (BRCR) were utilised to synthesise ZrB 2, as a precursor material for the production of ZrB 2-SiC. It was determined that reduction in the primary ZrB 2 particle size, alongside a diminished oxygen content, was capable of improving densification. ZrB 2-SiC ceramics, with ZrB 2 derived from BRW synthesis, exhibited a favorable combination of high relative density (98.6%), promoting a marked increase in Vickers hardness (21.4 ± 1.7 GPa) and improved thermal conductivity (68.7 W·m -1K -1).

    Original languageEnglish
    Pages (from-to)15843-15848
    Number of pages6
    JournalCeramics International
    Volume47
    Issue number11
    Early online date2 Mar 2021
    DOIs
    Publication statusPublished - 1 Jun 2021

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    This document is the author’s post-print version, incorporating any revisions agreed during the peer-review process. Some differences between the published version and this version may remain and you are advised to consult the published version if you wish to cite from it.

    Funder

    Pearl River Nova Program of Guangzhou under grant numbers 201710010142 , National Natural Science Foundation of China (No. 51402055 , 51602060 , 52072077 , 51832002 and U1401247 ), and Guangdong Innovative and Entrepreneurial Research Team Program (No. 2013G061 , 2017BT01C169 and 2014YT02C49 ).

    Keywords

    • ZrB-SiC
    • borothermal reduction
    • powder preparation
    • mechanical properties
    • thermal conductivity
    • spark plasma sintering
    • Spark plasma sintering
    • Powder preparation
    • Mechanical properties
    • Thermal conductivity
    • Borothermal reduction
    • ZrB -SiC

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Ceramics and Composites
    • Materials Chemistry
    • Surfaces, Coatings and Films
    • Process Chemistry and Technology

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