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In-situ generated mullite whisker reinforced silicon-based ceramic core and 3D printing preparation method thereof
The invention discloses an in-situ generated mullite whisker reinforced silicon-based ceramic core and a 3D printing preparation method thereof. The preparation method comprises the following steps: 1) preparing raw materials according to the composition of mold core slurry, and uniformly mixing the raw materials to form the mold core slurry; (2) molding the mold core slurry into a mold core biscuit through a photocuring 3D printing method; (3) sintering the mold core biscuit, and promoting mullite crystal nucleuses generated by in-situ reaction of gamma-aluminum oxide and quartz glass to grow into mullite crystal whiskers in an oriented manner by utilizing aluminum fluoride; and 4) soaking the sintered mold core biscuit in ethyl silicate hydrolysate, enabling the ethyl silicate hydrolysate to permeate into pores of the mold core biscuit in a negative pressure environment, and then drying to obtain the in-situ generated mullite whisker reinforced silicon-based ceramic mold core. According to the preparation method of the in-situ generated mullite whisker reinforced silicon-based ceramic core, a mold for pressing the core does not need to be designed and manufactured any more, and a high-performance ceramic core biscuit can be directly prepared.
本发明公开原位生成莫来石晶须增强的硅基陶瓷型芯及其3D打印制备方法。所述制备方法包括以下步骤：1）按照型芯料浆的组成准备各原料并将其混合均匀以形成型芯料浆；2）采用光固化3D打印方法将型芯料浆成型为型芯素坯；3）将型芯素坯烧结并利用三氟化铝促使γ‑氧化铝和石英玻璃原位反应生成的莫来石晶核定向生长为莫来石晶须；4）将烧结后的型芯素坯浸泡于硅酸乙酯水解液中，在负压环境下使硅酸乙酯水解液渗透进入型芯素坯的孔隙，然后干燥获得原位生成莫来石晶须增强的硅基陶瓷型芯。上述原位生成莫来石晶须增强的硅基陶瓷型芯的制备方法，不再需要设计和制作压制型芯的模具，可直接制备出高性能的陶瓷型芯素坯。
In-situ generated mullite whisker reinforced silicon-based ceramic core and 3D printing preparation method thereof
The invention discloses an in-situ generated mullite whisker reinforced silicon-based ceramic core and a 3D printing preparation method thereof. The preparation method comprises the following steps: 1) preparing raw materials according to the composition of mold core slurry, and uniformly mixing the raw materials to form the mold core slurry; (2) molding the mold core slurry into a mold core biscuit through a photocuring 3D printing method; (3) sintering the mold core biscuit, and promoting mullite crystal nucleuses generated by in-situ reaction of gamma-aluminum oxide and quartz glass to grow into mullite crystal whiskers in an oriented manner by utilizing aluminum fluoride; and 4) soaking the sintered mold core biscuit in ethyl silicate hydrolysate, enabling the ethyl silicate hydrolysate to permeate into pores of the mold core biscuit in a negative pressure environment, and then drying to obtain the in-situ generated mullite whisker reinforced silicon-based ceramic mold core. According to the preparation method of the in-situ generated mullite whisker reinforced silicon-based ceramic core, a mold for pressing the core does not need to be designed and manufactured any more, and a high-performance ceramic core biscuit can be directly prepared.
本发明公开原位生成莫来石晶须增强的硅基陶瓷型芯及其3D打印制备方法。所述制备方法包括以下步骤：1）按照型芯料浆的组成准备各原料并将其混合均匀以形成型芯料浆；2）采用光固化3D打印方法将型芯料浆成型为型芯素坯；3）将型芯素坯烧结并利用三氟化铝促使γ‑氧化铝和石英玻璃原位反应生成的莫来石晶核定向生长为莫来石晶须；4）将烧结后的型芯素坯浸泡于硅酸乙酯水解液中，在负压环境下使硅酸乙酯水解液渗透进入型芯素坯的孔隙，然后干燥获得原位生成莫来石晶须增强的硅基陶瓷型芯。上述原位生成莫来石晶须增强的硅基陶瓷型芯的制备方法，不再需要设计和制作压制型芯的模具，可直接制备出高性能的陶瓷型芯素坯。
In-situ generated mullite whisker reinforced silicon-based ceramic core and 3D printing preparation method thereof
原位生成莫来石晶须增强的硅基陶瓷型芯及其3D打印制备方法
MA JINGSONG (author) / YU QINGXIAO (author) / XU JING (author) / LI FEI (author) / LAI JUNHUA (author)
2021-07-20
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
/
B22C
FOUNDRY MOULDING
,
Gießformen
/
B28B
Formgeben von Ton oder anderen keramischen Stoffzusammensetzungen, Schlacke oder von Mischungen, die zementartiges Material enthalten, z.B. Putzmörtel
,
SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG OR MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
/
B33Y
ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
,
Additive (generative) Fertigung, d. h. die Herstellung von dreidimensionalen [3D] Bauteilen durch additive Abscheidung, additive Agglomeration oder additive Schichtung, z. B. durch 3D- Drucken, Stereolithografie oder selektives Lasersintern
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