Journal
MATERIALS & DESIGN
Volume 116, Issue -, Pages 261-267Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.matdes.2016.12.022
Keywords
Coating; Oxidation protection; Atmospheric plasma spraying; Thermal shock test
Categories
Funding
- National Natural Science Foundation of China [NSFC 51472235, 51101143]
- Key Laboratory of Inorganic Coating Materials, Chinese Academy of Sciences [KLICM-2014-02]
- Scientific Research Fund of Hunan Provincial Education Department [14C0048]
- Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation [2015CL06, 2016CL06]
Ask authors/readers for more resources
Yb2SiO5 and NdMgAl11O19 (NMA) powders were synthesized by solid-state reactions. Triple-layer ceramic coatings based on the Si bond layer, Yb2SiO5 interlayer and NMA top layer were prepared on carbon fiber reinforced silicon carbide ceramic matrix (C-f/SiC) composites by atmospheric plasma spraying CAPS). The coatings were subjected to thermal shock tests at 1300 degrees C, 1400 degrees C and 1450 degrees C, respectively. The results showed that the Si! Yb2SiO5/NMA coating significantly improved the oxidation resistance of Cf/SiC composites. The failure mechanism of the Si/Yb2SiO5/NMA coating was closely related to the thermal shock temperature. Below 1400 degrees C, the failure of the coating was connected with the mismatch of thermal expansion coefficient (CTE) between the coating and substrate, the reaction between Yb2SO5 and NMA at the interface, the poor sintering property of Yb2SiO5 and NMA and the substrate itself. Above 1450 degrees C, the coating failed after only one thermal shock cycle due to the temperature higher than the melting point of the silicon. (C) 2016 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available
Share Paper
