Thermal ablation behavior of SiBCN-Zr composites prepared by reactive spark plasma sintering

Yang Miao, Zhihua Yang, Qishuai Zhu, Bin Liang, Quan Li, Zhuo Tian, Dechang Jia, YiBing Cheng, Yu Zhou

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17 Citations (Scopus)

Abstract

To meet the ultrahigh temperature requirements of a thermal protection system, an ultrahigh temperature phase of ZrB2 was introduced into a SiBCN matrix that was fabricated using a reactive spark plasma sintering method. The thermal ablation behavior of SiBCN-Zr composites was investigated using an oxyacetylene flame test. The test results indicated that the ablation behavior of the modified ceramic composites was significantly improved over that of a monolithic SiBCN ceramic. The linear and mass ablation rates of the SiBCN-Zr material were found to be 0.004 mm/s and 4.75×10−4 g/s, which was indicative of excellent ablation resistance. Analysis of the material after thermal ablation testing showed that ablation products mainly consisted of the ZrSiO4, SiO2 and ZrO2 phases. A reaction occurred between the SiO2 and ZrO2 phases in the central region of the ceramic forming ZrSiO4 that protected the material from further thermal damage. A loose and porous oxidation layer was found from the matrix based on analysis of a cross-section image.

Original languageEnglish
Pages (from-to)7978-7983
Number of pages6
JournalCeramics International
Volume43
Issue number11
DOIs
Publication statusPublished - 1 Aug 2017

Keywords

  • Ablation properties
  • SiBCN
  • SPS
  • ZrB

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