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Laser additive forming zirconia ceramic strengthening method based on grain refinement
A laser additive forming zirconia ceramic strengthening method based on grain refinement comprises the following steps: firstly, weighing 5-7wt% of alumina ceramic powder and 93-95wt% of zirconia ceramic powder in percentage by weight; secondly, fully mixing the weighed zirconia ceramic powder and alumina ceramic powder for more than 5 hours, and then drying the mixed powder for 2-4 hours at the temperature of 100-200 DEG C to obtain dry raw material powder for later use; and finally, carrying out additive forming on the zirconium oxide ceramic by using a directional energy deposition technology to complete the preparation of the reinforced zirconium oxide ceramic based on grain refinement. A small amount of aluminum oxide solute component is added into zirconia ceramic raw material powder to promote the formation of a component supercooling area at the front edge of a solidification interface during forming and activate nucleation particles existing in the area, so that a microstructure after forming is converted into a uniform and fine equiaxed crystal structure from a thick columnar crystal structure, and the microstructure is further strengthened and homogenized; and finally, crack inhibition and mechanical property improvement of the additive-formed zirconia ceramic are realized, and the problems of many defects and poor performance of the existing zirconia ceramic in laser additive manufacturing are solved.
一种基于晶粒细化的激光增材成型氧化锆陶瓷强化方法，首先，按重量百分比计，称取5‑7wt％氧化铝陶瓷粉料及93‑95wt％的氧化锆陶瓷粉料；其次，将称取的氧化锆陶瓷粉料与氧化铝陶瓷粉料充分混合5小时以上，然后将混合好的粉料在100‑200℃条件下保温干燥2‑4小时，得到干燥原料粉末备用；最后，使用定向能量沉积技术进行氧化锆陶瓷的增材成型，完成基于晶粒细化的强化氧化锆陶瓷的制备；在氧化锆陶瓷原料粉体中添加少量氧化铝溶质成分，促进成型中的凝固界面前沿形成成分过冷区，激活该区域存在的形核质点，使成型后微观结构由粗大柱状晶组织转变为均匀细小等轴晶组织，进而强化和均匀化微观组织结构，最终实现增材成形氧化锆陶瓷的裂纹抑制以及机械性能提升，解决了目前氧化锆陶瓷在激光增材制造中面临的缺陷多、性能差的问题。
Laser additive forming zirconia ceramic strengthening method based on grain refinement
A laser additive forming zirconia ceramic strengthening method based on grain refinement comprises the following steps: firstly, weighing 5-7wt% of alumina ceramic powder and 93-95wt% of zirconia ceramic powder in percentage by weight; secondly, fully mixing the weighed zirconia ceramic powder and alumina ceramic powder for more than 5 hours, and then drying the mixed powder for 2-4 hours at the temperature of 100-200 DEG C to obtain dry raw material powder for later use; and finally, carrying out additive forming on the zirconium oxide ceramic by using a directional energy deposition technology to complete the preparation of the reinforced zirconium oxide ceramic based on grain refinement. A small amount of aluminum oxide solute component is added into zirconia ceramic raw material powder to promote the formation of a component supercooling area at the front edge of a solidification interface during forming and activate nucleation particles existing in the area, so that a microstructure after forming is converted into a uniform and fine equiaxed crystal structure from a thick columnar crystal structure, and the microstructure is further strengthened and homogenized; and finally, crack inhibition and mechanical property improvement of the additive-formed zirconia ceramic are realized, and the problems of many defects and poor performance of the existing zirconia ceramic in laser additive manufacturing are solved.
一种基于晶粒细化的激光增材成型氧化锆陶瓷强化方法，首先，按重量百分比计，称取5‑7wt％氧化铝陶瓷粉料及93‑95wt％的氧化锆陶瓷粉料；其次，将称取的氧化锆陶瓷粉料与氧化铝陶瓷粉料充分混合5小时以上，然后将混合好的粉料在100‑200℃条件下保温干燥2‑4小时，得到干燥原料粉末备用；最后，使用定向能量沉积技术进行氧化锆陶瓷的增材成型，完成基于晶粒细化的强化氧化锆陶瓷的制备；在氧化锆陶瓷原料粉体中添加少量氧化铝溶质成分，促进成型中的凝固界面前沿形成成分过冷区，激活该区域存在的形核质点，使成型后微观结构由粗大柱状晶组织转变为均匀细小等轴晶组织，进而强化和均匀化微观组织结构，最终实现增材成形氧化锆陶瓷的裂纹抑制以及机械性能提升，解决了目前氧化锆陶瓷在激光增材制造中面临的缺陷多、性能差的问题。
Laser additive forming zirconia ceramic strengthening method based on grain refinement
一种基于晶粒细化的激光增材成型氧化锆陶瓷强化方法
FAN ZHIQI (author) / KANG CHENGWEI (author) / LI YONGJUN (author) / TAN QICHANG (author) / HUANG HAN (author)
2024-07-23
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
/
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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