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oxide high-entropy ceramic with defective fluorite structure and preparation method of anti-ablation coating of oxide high-entropy ceramic
The invention relates to oxide high-entropy ceramic with a defective fluorite structure and a preparation method of an anti-ablation coating of the oxide high-entropy ceramic. The preparation method comprises the following steps of: firstly, preparing high-entropy ceramic powder by adopting a high-temperature solid-phase reaction method; and then, by using a supersonic plasma spraying technology, preparing a high-entropy ceramic coating with corresponding components on the surface of a base material by using the high-entropy ceramic powder having been subjected to spray drying treatment. The high-entropy ceramic coating (HfZr(3RE))O2-delta (wherein RE is selected from Sm, Er, Ce, Y, Yb) provided by the invention has excellent phase stability and ablation resistance. In a supersonic plasma spraying process, the high-entropy ceramic is free of phase change and phase decomposition, and the prepared high-entropy ceramic coating still keeps the phase structure of the original high-entropy ceramic powder. The high-entropy ceramic coating is ablated and examined in oxyacetylene flames with heat flux density of 2.38 MW/m<2>, the highest temperature of the surface of the coating in the ablating process reaches 1900-2100 DEG C, the ablated coating does not have the phenomena of stripping, peeling and the like, an ablating rate is low, and excellent anti-ablating performance is shown.
本发明涉及一种缺陷萤石结构的氧化物高熵陶瓷及其抗烧蚀涂层的制备方法，首先采用高温固相反应法制备高熵陶瓷粉体，随后采用超音速等离子体喷涂技术，将经过喷雾干燥处理后的高熵陶瓷粉体在基体材料表面制备出相应成分的高熵陶瓷涂层。本发明涉及的(HfZr(3RE))O2‑δ(RE＝Sm、Er、Ce、Y、Yb)高熵陶瓷涂层，具有优异的相稳定性与抗烧蚀性能。在超音速等离子体喷涂的过程中高熵陶瓷无相变与相分解，制备出的高熵陶瓷涂层仍保持原有高熵陶瓷粉体的相结构。高熵陶瓷涂层在热流密度为2.38MW/m2的氧乙炔火焰中烧蚀考核，烧蚀过程中涂层表面最高温度达到1900‑2100℃，烧蚀后涂层无剥落与起皮等现象发生，具有较低的烧蚀率，显示出优异的抗烧蚀性能。
oxide high-entropy ceramic with defective fluorite structure and preparation method of anti-ablation coating of oxide high-entropy ceramic
The invention relates to oxide high-entropy ceramic with a defective fluorite structure and a preparation method of an anti-ablation coating of the oxide high-entropy ceramic. The preparation method comprises the following steps of: firstly, preparing high-entropy ceramic powder by adopting a high-temperature solid-phase reaction method; and then, by using a supersonic plasma spraying technology, preparing a high-entropy ceramic coating with corresponding components on the surface of a base material by using the high-entropy ceramic powder having been subjected to spray drying treatment. The high-entropy ceramic coating (HfZr(3RE))O2-delta (wherein RE is selected from Sm, Er, Ce, Y, Yb) provided by the invention has excellent phase stability and ablation resistance. In a supersonic plasma spraying process, the high-entropy ceramic is free of phase change and phase decomposition, and the prepared high-entropy ceramic coating still keeps the phase structure of the original high-entropy ceramic powder. The high-entropy ceramic coating is ablated and examined in oxyacetylene flames with heat flux density of 2.38 MW/m<2>, the highest temperature of the surface of the coating in the ablating process reaches 1900-2100 DEG C, the ablated coating does not have the phenomena of stripping, peeling and the like, an ablating rate is low, and excellent anti-ablating performance is shown.
本发明涉及一种缺陷萤石结构的氧化物高熵陶瓷及其抗烧蚀涂层的制备方法，首先采用高温固相反应法制备高熵陶瓷粉体，随后采用超音速等离子体喷涂技术，将经过喷雾干燥处理后的高熵陶瓷粉体在基体材料表面制备出相应成分的高熵陶瓷涂层。本发明涉及的(HfZr(3RE))O2‑δ(RE＝Sm、Er、Ce、Y、Yb)高熵陶瓷涂层，具有优异的相稳定性与抗烧蚀性能。在超音速等离子体喷涂的过程中高熵陶瓷无相变与相分解，制备出的高熵陶瓷涂层仍保持原有高熵陶瓷粉体的相结构。高熵陶瓷涂层在热流密度为2.38MW/m2的氧乙炔火焰中烧蚀考核，烧蚀过程中涂层表面最高温度达到1900‑2100℃，烧蚀后涂层无剥落与起皮等现象发生，具有较低的烧蚀率，显示出优异的抗烧蚀性能。
oxide high-entropy ceramic with defective fluorite structure and preparation method of anti-ablation coating of oxide high-entropy ceramic
缺陷萤石结构的氧化物高熵陶瓷及其抗烧蚀涂层的制备方法
SUN JIA (author) / GUO LINGXIANG (author) / ZHANG YUYU (author) / LIU BING (author) / ZHANG PEI (author)
2021-11-23
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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