Journal
CORROSION SCIENCE
Volume 124, Issue -, Pages 103-120Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2017.05.013
Keywords
Ceramic matrix composites; TEM; XRD; High temperature corrosion; Oxidation
Funding
- National Natural Science Foundation of China (NSFC) [51072041, 50902031, 51621091, 51021002]
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The high temperature oxidation behavior of three SiBCN monoliths: carbon-lean SiBCN with substantial Si metal, carbon-moderate SiBCN and carbon-rich SiBCN with excessive carbon, was investigated at 1500 degrees C for times up to 15 h. Scale growth for carbon-lean and - moderate monoliths at 1500 degrees C cannot be described by a linear or parabolic rate law, while the carbon-rich monoliths oxidize according to a approximately linear weight loss equation. The microstructures of the oxide scale compose of three distinct layers. The passivating layer of carbon and boron containing amorphous SiO2 and increased oxidation resistance of BN(C) both benefit the oxidation resistance.
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