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Preparation method of in-situ self-generating mullite whisker reinforced silicon-based ceramic core
The invention relates to a preparation method of an in-situ self-generating mullite whisker reinforced silicon-based ceramic core, which comprises the following steps: putting semi-refined paraffin, beewax, polyethylene and oleic acid into a vacuum wax kettle, conducting stirring and melting, adding quartz glass powder, aluminum hydroxide powder, aluminum trifluoride powder and zirconium silicatepowder, further conducting stirring in vacuum, pouring the stirred materials out, and conducting cooling to form an ingot; adding the ingot into a core pressing machine, and conducting melting and pressing to obtain a ceramic core biscuit, wherein aluminum hydroxide and silicon dioxide in quartz glass powder are subjected to mullitization under the catalysis of aluminum trifluoride powder to generate mullite whiskers; embedding the ceramic core biscuit into light magnesium oxide powder, and performing four-stage sintering to obtain a ceramic core; and then subjecting the ceramic core to strengthening treatment, so as to obtain a final ceramic core finished product. According to the method, the high-temperature creep resistance of the silicon-based ceramic core can be remarkably improved, and meanwhile, good alkali liquor dissolution and core removal performance is kept.
一种原位自生莫来石晶须增强的硅基陶瓷型芯制备方法，将半精炼石蜡、蜂蜡、聚乙烯和油酸放入真空和蜡釜中搅拌熔融后，再加入石英玻璃粉、氢氧化铝粉、三氟化铝粉和硅酸锆粉，进一步进行真空搅拌后倒出，冷却后形成料锭；将料锭加入到压芯机中，再经熔融压制获得陶瓷型芯素坯，其中的氢氧化铝和石英玻璃粉中的二氧化硅在三氟化铝粉催化下发生莫来石化，生成莫来石晶须；将陶瓷型芯素坯包埋在轻质氧化镁粉中，经四阶段烧结得到陶瓷型芯；再将陶瓷型芯进行强化处理，达到最终的陶瓷型芯成品。本发明能够显著提高硅基陶瓷型芯抗高温蠕变性的同时保持良好的碱液溶出脱芯性能。
Preparation method of in-situ self-generating mullite whisker reinforced silicon-based ceramic core
The invention relates to a preparation method of an in-situ self-generating mullite whisker reinforced silicon-based ceramic core, which comprises the following steps: putting semi-refined paraffin, beewax, polyethylene and oleic acid into a vacuum wax kettle, conducting stirring and melting, adding quartz glass powder, aluminum hydroxide powder, aluminum trifluoride powder and zirconium silicatepowder, further conducting stirring in vacuum, pouring the stirred materials out, and conducting cooling to form an ingot; adding the ingot into a core pressing machine, and conducting melting and pressing to obtain a ceramic core biscuit, wherein aluminum hydroxide and silicon dioxide in quartz glass powder are subjected to mullitization under the catalysis of aluminum trifluoride powder to generate mullite whiskers; embedding the ceramic core biscuit into light magnesium oxide powder, and performing four-stage sintering to obtain a ceramic core; and then subjecting the ceramic core to strengthening treatment, so as to obtain a final ceramic core finished product. According to the method, the high-temperature creep resistance of the silicon-based ceramic core can be remarkably improved, and meanwhile, good alkali liquor dissolution and core removal performance is kept.
一种原位自生莫来石晶须增强的硅基陶瓷型芯制备方法，将半精炼石蜡、蜂蜡、聚乙烯和油酸放入真空和蜡釜中搅拌熔融后，再加入石英玻璃粉、氢氧化铝粉、三氟化铝粉和硅酸锆粉，进一步进行真空搅拌后倒出，冷却后形成料锭；将料锭加入到压芯机中，再经熔融压制获得陶瓷型芯素坯，其中的氢氧化铝和石英玻璃粉中的二氧化硅在三氟化铝粉催化下发生莫来石化，生成莫来石晶须；将陶瓷型芯素坯包埋在轻质氧化镁粉中，经四阶段烧结得到陶瓷型芯；再将陶瓷型芯进行强化处理，达到最终的陶瓷型芯成品。本发明能够显著提高硅基陶瓷型芯抗高温蠕变性的同时保持良好的碱液溶出脱芯性能。
Preparation method of in-situ self-generating mullite whisker reinforced silicon-based ceramic core
原位自生莫来石晶须增强的硅基陶瓷型芯制备方法
LI FEI (author) / MA XIN (author) / LI ZHENFENG (author) / YI CHUSHAN (author) / HAO XIN (author) / WANG DONGHONG (author) / SUN BAODE (author)
2020-12-11
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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