Journal
CORROSION SCIENCE
Volume 175, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2020.108866
Keywords
Single source precursor; Spark plasma sintering; Ceramic nanocomposite; Thermal stability; Oxidation resistance
Funding
- Shaanxi Provincial Education Department of China [2020JQ-170, 2020TD-003]
- Fundamental Research Funds for the Central Universities [G2019KY05116]
- Fund of Key Laboratory of National Defense Science and Technology in Northwestern Polytechnical University (NPU) [JZX7Y201911SY008901 6142911190207]
- National Natural Science Foundation of China [51821091, 51872246]
- NPU-TU Darmstadt Joint International Research Laboratory of Ultrahigh Ceramic Matrix Composites (JIRL)
- Key Laboratory of High Performance Ceramic Fibers of Ministry of Education (Xiamen University)
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High temperature stability (1100 -1500 degrees C) and oxidation behavior at 1500 degrees C of the SiOC/HfO2 ceramic nanocomposite were investigated in air. Consumption of free carbon dominated thermal stabilities of the bulk at below 1200 degrees C. Whereas, the continuous cristobalite scale, rather than HfSiO4, was responsible for the improved oxidation resistance at exceeding 1200 degrees C. At 1500 degrees C, HfSiO4, with maximum 30 vol. % concentration for duration of similar to 15 h, suffered ruptured spherical-bubbles by volatilized species and did not consolidate into a completely protective scale. Thus, the bulk exhibited limited resistance to oxidation at 1500 degrees C for long-term applications.
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