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

    Research output: Contribution to journalArticlepeer-review

    12 Citations (Scopus)


    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
    Issue number11
    Early online date2 Mar 2021
    Publication statusPublished - 1 Jun 2021


    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 ).


    • 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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