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In situ observation of environmental barrier coating against calcium–magnesium–alumina–silicate attack at elevated temperature
Author(s) -
Yang Haitang,
Zhang Yanwei,
Li Yang,
Huang Xiaozhong,
Liu Yu
Publication year - 2021
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.13760
Subject(s) - materials science , coating , calcium silicate , scanning electron microscope , silicate , ceramic , phase (matter) , chemical engineering , magnesium , in situ , surface modification , composite material , metallurgy , chemistry , engineering , organic chemistry
Environmental barrier coating (EBC) plays a crucial role in improving the property of ceramic matrix composites at harsh environment. In this work, an in situ observation method was employed to systematically study the resistance of EBC to calcium–magnesium–alumina–silicate (CMAS) phase at elevated temperatures, which were 1200℃, 1300℃, and 1500℃, respectively. The melting and spreading process of the CMAS phase on the surface of the EBC was obtained via this method. In addition, the erosion effect of CMAS phase on EBC at different temperatures was analyzed by combining the scanning electron microscope (SEM) and energy dispersive spectrum (EDS), which provided a guidance for the modification of EBC.