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A platform for research: civil engineering, architecture and urbanism
Aluminum nitride/aluminum oxide composite ceramic core and preparation method thereof
The invention relates to a preparation method of an aluminum nitride/aluminum oxide composite ceramic core for directional solidification, which comprises the following steps: mixing fused corundum powder, spherical aluminum nitride powder, kaolin and lignin fiber which are used as raw materials of the ceramic core, adding a plasticizer to prepare slurry, carrying out pressing and two-stage sintering, and then conducting reinforcement with an ethyl silicate hydrolysate to obtain the aluminum nitride/aluminum oxide composite ceramic core. The obtained composite ceramic core has excellent thermal shock resistance and good alkali liquor dissolving performance, can bear the high temperature of 1550 DEG C to 1700 DEG C, is small in deformation amount, does not crack under the high temperature gradient, and is used for meeting the requirement for directional solidification forming of turbine hollow blades of aero-engines and gas turbines.
一种定向凝固用氮化铝/氧化铝复合陶瓷型芯的制备方法，将作为陶瓷型芯原料的电熔刚玉粉、球形氮化铝粉、高岭土、木质素纤维混合后加入增塑剂制成浆料，经压制和两阶段烧结后，再经硅酸乙酯水解液强化得到氮化铝/氧化铝复合陶瓷型芯；本发明得到的复合陶瓷型芯具有优良的抗热震性能以及较好的碱液溶解性能，能够承受1550℃‑1700℃的高温而变形量很小，在高温度梯度下不开裂，用于满足航空发动机和燃气轮机涡轮空心叶片定向凝固成形需求。
Aluminum nitride/aluminum oxide composite ceramic core and preparation method thereof
The invention relates to a preparation method of an aluminum nitride/aluminum oxide composite ceramic core for directional solidification, which comprises the following steps: mixing fused corundum powder, spherical aluminum nitride powder, kaolin and lignin fiber which are used as raw materials of the ceramic core, adding a plasticizer to prepare slurry, carrying out pressing and two-stage sintering, and then conducting reinforcement with an ethyl silicate hydrolysate to obtain the aluminum nitride/aluminum oxide composite ceramic core. The obtained composite ceramic core has excellent thermal shock resistance and good alkali liquor dissolving performance, can bear the high temperature of 1550 DEG C to 1700 DEG C, is small in deformation amount, does not crack under the high temperature gradient, and is used for meeting the requirement for directional solidification forming of turbine hollow blades of aero-engines and gas turbines.
一种定向凝固用氮化铝/氧化铝复合陶瓷型芯的制备方法，将作为陶瓷型芯原料的电熔刚玉粉、球形氮化铝粉、高岭土、木质素纤维混合后加入增塑剂制成浆料，经压制和两阶段烧结后，再经硅酸乙酯水解液强化得到氮化铝/氧化铝复合陶瓷型芯；本发明得到的复合陶瓷型芯具有优良的抗热震性能以及较好的碱液溶解性能，能够承受1550℃‑1700℃的高温而变形量很小，在高温度梯度下不开裂，用于满足航空发动机和燃气轮机涡轮空心叶片定向凝固成形需求。
Aluminum nitride/aluminum oxide composite ceramic core and preparation method thereof
氮化铝/氧化铝复合陶瓷型芯及其制备方法
LI FEI (author) / LI ZHENFENG (author) / MA XIN (author) / YI CHUSHAN (author) / WANG DONGHONG (author) / SUN BAODE (author) / LEI SIXIONG (author) / HAO XIN (author)
2020-12-11
Patent
Electronic Resource
Chinese
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