Ablation behavior and mechanism of boron nitride - magnesium aluminum silicate ceramic composites in an oxyacetylene combustion flame

Delong Cai, Zhihua Yang, Jingkun Yuan, Xiaoming Duan, Shengjin Wang, Vaclav Ocelik, J. TH. M. De Hosson, Dechang Jia, Yu Zhou

    OnderzoeksoutputAcademicpeer review

    4 Citaten (Scopus)
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    In the present study, ablation behavior and properties of BN-MAS (magnesium aluminum silicate) composites impinged with an oxyacetylene flame at temperatures up to 3100 degrees C were investigated. As ablation time ranged from 5 to 30 s, the mass and linear ablation rates increased from 0.0027 g/s and 0.001 mm/s to 0.0254 g/s and 0.087 mm/s, respectively. A SiO2-rich protective oxide layer formed during the ablation process, which contributed to the oxidation resistance of the composites. Ablation products mainly consisted of magnesium-aluminum borosilicate glass, mullite, spinel and indialite. The thermal oxidation of h-BN during flame ablation and scouring of MAS by high-speed gas flow were the main ablation mechanisms.

    Originele taal-2English
    Pagina's (van-tot)1518-1525
    Aantal pagina's8
    TijdschriftCeramics International
    Volume44
    Nummer van het tijdschrift2
    DOI's
    StatusPublished - 1-feb-2018

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