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Composite ceramic core for single crystal turbine blade and preparation method of composite ceramic core
The invention discloses a composite ceramic core for a single crystal turbine blade and a preparation method of the composite ceramic core. The composite ceramic core comprises the following components in percentage by mass: 50-80% of quartz glass powder, 10-30% of zircon powder, 5-15% of cristobalite powder and 3-5% of glass fiber. The preparation method comprises the following steps: uniformly mixing quartz glass powder, zircon powder, cristobalite powder and glass fiber, adding a plasticizer, pressing to form a ceramic core blank, and roasting the ceramic core blank to form the composite ceramic core for the single crystal turbine blade. The ceramic core can be sintered at a low temperature of 1200 DEG C or below, has excellent dimensional stability at 1550-1600 DEG C, has a high-temperature deflection of less than or equal to 0.1 mm at 1550 DEG C, a high-temperature deflection of less than or equal to 0.2 mm at 1600 DEG C, a sintering shrinkage rate of less than or equal to 0.6%, and a high-temperature bending strength of 13MPa at 1550 DEG C, and has excellent high-temperature strength and dimensional stability. And the solution stall rate is 0.12 g/min, the solvent is easy to remove, and the use requirement of investment casting of the single-crystal turbine blade can be met.
本发明公开了一种用于单晶涡轮叶片的复合陶瓷型芯及其制备方法，包括质量百分比为50～80％的石英玻璃粉、10％～30％的锆英粉、5～15％的方石英粉和3％‑5％的玻璃纤维；石英玻璃粉、锆英粉、方石英粉、玻璃纤维混合均匀后加入增塑剂，压制形成陶瓷型芯胚体，将陶瓷型芯胚体焙烧后形成用于单晶涡轮叶片的复合陶瓷型芯。本发明的陶瓷型芯在1200℃以下的较低温度下即可烧结，在1550℃～1600℃间具有极好的尺寸稳定性，1550℃下的高温挠度≤0.1mm，1600℃下的高温挠度≤0.2mm，烧结收缩率≤0.6％，1550℃下的高温抗弯强度可达13MPa，兼具优良的高温强度和尺寸稳定性。溶失速率为0.12g/min，易于脱除，可以满足单晶涡轮叶片熔模铸造的使用需要。
Composite ceramic core for single crystal turbine blade and preparation method of composite ceramic core
The invention discloses a composite ceramic core for a single crystal turbine blade and a preparation method of the composite ceramic core. The composite ceramic core comprises the following components in percentage by mass: 50-80% of quartz glass powder, 10-30% of zircon powder, 5-15% of cristobalite powder and 3-5% of glass fiber. The preparation method comprises the following steps: uniformly mixing quartz glass powder, zircon powder, cristobalite powder and glass fiber, adding a plasticizer, pressing to form a ceramic core blank, and roasting the ceramic core blank to form the composite ceramic core for the single crystal turbine blade. The ceramic core can be sintered at a low temperature of 1200 DEG C or below, has excellent dimensional stability at 1550-1600 DEG C, has a high-temperature deflection of less than or equal to 0.1 mm at 1550 DEG C, a high-temperature deflection of less than or equal to 0.2 mm at 1600 DEG C, a sintering shrinkage rate of less than or equal to 0.6%, and a high-temperature bending strength of 13MPa at 1550 DEG C, and has excellent high-temperature strength and dimensional stability. And the solution stall rate is 0.12 g/min, the solvent is easy to remove, and the use requirement of investment casting of the single-crystal turbine blade can be met.
本发明公开了一种用于单晶涡轮叶片的复合陶瓷型芯及其制备方法，包括质量百分比为50～80％的石英玻璃粉、10％～30％的锆英粉、5～15％的方石英粉和3％‑5％的玻璃纤维；石英玻璃粉、锆英粉、方石英粉、玻璃纤维混合均匀后加入增塑剂，压制形成陶瓷型芯胚体，将陶瓷型芯胚体焙烧后形成用于单晶涡轮叶片的复合陶瓷型芯。本发明的陶瓷型芯在1200℃以下的较低温度下即可烧结，在1550℃～1600℃间具有极好的尺寸稳定性，1550℃下的高温挠度≤0.1mm，1600℃下的高温挠度≤0.2mm，烧结收缩率≤0.6％，1550℃下的高温抗弯强度可达13MPa，兼具优良的高温强度和尺寸稳定性。溶失速率为0.12g/min，易于脱除，可以满足单晶涡轮叶片熔模铸造的使用需要。
Composite ceramic core for single crystal turbine blade and preparation method of composite ceramic core
一种用于单晶涡轮叶片的复合陶瓷型芯及其制备方法
TANG XING (author) / YANG ZENGHUI (author) / LI HUI (author) / HAN YU (author) / WEN GUANGPING (author) / YANG RUIQI (author) / LIU NING (author) / LIU RONG (author)
2023-07-25
Patent
Electronic Resource
Chinese
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