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Temperature-resistant ceramic material and preparation method thereof
The invention discloses a temperature-resistant ceramic material and a preparation method thereof. The temperature-resistant ceramic material comprises the following components in parts by mass: modified silicon carbide fiber, boron carbide powder, zirconium oxide powder, yttrium oxide powder, tantalum pentoxide powder and hafnium oxide powder. Wherein the average particle size of the boron carbide powder is larger than the diameter of the silicon carbide fibers, and the average particle size of the zirconium oxide powder, the yttrium oxide powder and the tantalum pentoxide powder is smaller than the diameter of the silicon carbide fibers; according to the invention, by controlling oxide components and the temperature and time of low-temperature sintering and high-temperature sintering, a reaction is carried out on the surface of the modified silicon carbide fiber to generate a composite oxide coating layer, and a part of oxide on the surface of the coating layer reacts with boron carbide powder at a high temperature to generate a metal boride with higher hardness and oxidation resistance; the oxide coating layer improves the water and oxygen resistance and toughness of silicon carbide, and the metal boride improves the mechanical properties and high-temperature water and oxygen corrosion resistance of the ceramic material.
本发明公开一种耐温陶瓷材料及其制备方法，所述耐温陶瓷材料按照质量份数包括改性碳化硅纤维，碳化硼粉，氧化锆粉，氧化钇粉，五氧化二钽粉以及氧化铪粉。其中碳化硼粉的平均粒径大于碳化硅纤维直径，氧化锆粉，氧化钇粉，五氧化二钽粉的平均粒径小于碳化硅纤维直径；本发明通过控制氧化物成分，低温烧结和高温烧结的温度和时间，在改性碳化硅纤维的表面进行反应生成复合的氧化物包覆层，并在包覆层表面部分氧化物与碳化硼粉高温下反应生成具有更高硬度和耐氧化性能的金属硼化物，氧化物包覆层提高了碳化硅的耐水氧性能以及韧性，金属硼化物提高了陶瓷材料的力学性能以及耐高温水氧腐蚀性能。
Temperature-resistant ceramic material and preparation method thereof
The invention discloses a temperature-resistant ceramic material and a preparation method thereof. The temperature-resistant ceramic material comprises the following components in parts by mass: modified silicon carbide fiber, boron carbide powder, zirconium oxide powder, yttrium oxide powder, tantalum pentoxide powder and hafnium oxide powder. Wherein the average particle size of the boron carbide powder is larger than the diameter of the silicon carbide fibers, and the average particle size of the zirconium oxide powder, the yttrium oxide powder and the tantalum pentoxide powder is smaller than the diameter of the silicon carbide fibers; according to the invention, by controlling oxide components and the temperature and time of low-temperature sintering and high-temperature sintering, a reaction is carried out on the surface of the modified silicon carbide fiber to generate a composite oxide coating layer, and a part of oxide on the surface of the coating layer reacts with boron carbide powder at a high temperature to generate a metal boride with higher hardness and oxidation resistance; the oxide coating layer improves the water and oxygen resistance and toughness of silicon carbide, and the metal boride improves the mechanical properties and high-temperature water and oxygen corrosion resistance of the ceramic material.
本发明公开一种耐温陶瓷材料及其制备方法，所述耐温陶瓷材料按照质量份数包括改性碳化硅纤维，碳化硼粉，氧化锆粉，氧化钇粉，五氧化二钽粉以及氧化铪粉。其中碳化硼粉的平均粒径大于碳化硅纤维直径，氧化锆粉，氧化钇粉，五氧化二钽粉的平均粒径小于碳化硅纤维直径；本发明通过控制氧化物成分，低温烧结和高温烧结的温度和时间，在改性碳化硅纤维的表面进行反应生成复合的氧化物包覆层，并在包覆层表面部分氧化物与碳化硼粉高温下反应生成具有更高硬度和耐氧化性能的金属硼化物，氧化物包覆层提高了碳化硅的耐水氧性能以及韧性，金属硼化物提高了陶瓷材料的力学性能以及耐高温水氧腐蚀性能。
Temperature-resistant ceramic material and preparation method thereof
一种耐温陶瓷材料及其制备方法
LIN SHANGTAO (author) / ZHAO FANGBIAO (author)
2024-12-27
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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