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Volatility diagram of ZrB 2 ‐SiC‐ZrC system and experimental validation
Author(s) -
Lu Ying,
Zou Ji,
Xu Fangfang,
Zhang GuoJun
Publication year - 2018
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.15497
Subject(s) - materials science , volatility (finance) , zirconium carbide , ceramic , diagram , carbide , zirconium diboride , metallurgy , mathematics , econometrics , statistics
A volatility diagram of zirconium carbide (ZrC) at 1600, 1930, and 2200°C was calculated in this work. Combining it with the existing volatility diagrams of ZrB 2 and SiC, the volatility diagram of a ternary ZrB 2 ‐SiC‐ZrC ( ZSZ ) system was constructed in order to interpret the oxidation behavior of ZSZ ceramics. Applying this diagram, the formation of ZrC‐corroded and SiC‐depleted layers and the oxidation sequence of each component in ZSZ during oxidation and ablation could be well understood. Most of the predictions from the diagrams are consistent with the experimental observations on the oxidation scale of dense ZrB 2 ‐SiC‐ZrC ceramics/coatings after oxidation at 1600°C or ablation at 1930 and 2200°C. The reasons for the discrepancy are also briefly discussed.