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Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Method for preparing aluminum nitride ceramic by adhesive spray molding technology
The invention discloses a method for preparing aluminum nitride ceramic through an adhesive injection molding technology, and relates to the technical field of adhesive injection additive manufacturing. According to the preparation method, submicron aluminum nitride powder is adopted for preparation, polyvinyl butyral and a water repellent agent are sequentially used for modifying the powder, the problem that an adhesive is hydrolyzed due to the fact that the aluminum nitride powder reacts with a water-based adhesive is solved, and an aluminum nitride ceramic green body is successfully printed through the adhesive spraying technology. Besides, after the green body is degreased, metal ions are infiltrated into the green body by adopting an infiltration process, so that the density of the green body is improved, a second phase is successfully introduced, the preparation of the AlN ceramic with high density, fine crystal grains and uniform microstructure is facilitated, and the mechanical property and thermal shock resistance of the AlN ceramic are improved. According to the method, hot isostatic pressing treatment is carried out on the sintered body obtained through sintering, the strength and hardness of the aluminum nitride ceramic are further improved, and finally the aluminum nitride ceramic with high performance is obtained.
本发明公开了一种粘接剂喷射成型技术制备氮化铝陶瓷的方法，涉及粘接剂喷射增材制造技术领域。本发明的制备方法采用亚微米级的氮化铝粉体进行制备，先后用聚乙烯醇缩丁醛和疏水剂对粉体进行改性处理，解决了氮化铝粉体与水基粘接剂发生反应而导致粘接剂水解的问题，成功利用粘接剂喷射技术打印出氮化铝陶瓷坯体。此外，本发明在坯体脱脂后采用浸渗工艺使坯体渗入金属离子，以提高坯体密度并成功引入第二相，有利于制备致密度高、晶粒细小、微观结构均匀的AlN陶瓷，提高其力学性能和抗热震性能。本发明的方法中，还包括对烧结得到的烧结体进行热等静压处理，进一步提高了氮化铝陶瓷的强度和硬度，最终得到具有高性能的氮化铝陶瓷。
Method for preparing aluminum nitride ceramic by adhesive spray molding technology
The invention discloses a method for preparing aluminum nitride ceramic through an adhesive injection molding technology, and relates to the technical field of adhesive injection additive manufacturing. According to the preparation method, submicron aluminum nitride powder is adopted for preparation, polyvinyl butyral and a water repellent agent are sequentially used for modifying the powder, the problem that an adhesive is hydrolyzed due to the fact that the aluminum nitride powder reacts with a water-based adhesive is solved, and an aluminum nitride ceramic green body is successfully printed through the adhesive spraying technology. Besides, after the green body is degreased, metal ions are infiltrated into the green body by adopting an infiltration process, so that the density of the green body is improved, a second phase is successfully introduced, the preparation of the AlN ceramic with high density, fine crystal grains and uniform microstructure is facilitated, and the mechanical property and thermal shock resistance of the AlN ceramic are improved. According to the method, hot isostatic pressing treatment is carried out on the sintered body obtained through sintering, the strength and hardness of the aluminum nitride ceramic are further improved, and finally the aluminum nitride ceramic with high performance is obtained.
本发明公开了一种粘接剂喷射成型技术制备氮化铝陶瓷的方法，涉及粘接剂喷射增材制造技术领域。本发明的制备方法采用亚微米级的氮化铝粉体进行制备，先后用聚乙烯醇缩丁醛和疏水剂对粉体进行改性处理，解决了氮化铝粉体与水基粘接剂发生反应而导致粘接剂水解的问题，成功利用粘接剂喷射技术打印出氮化铝陶瓷坯体。此外，本发明在坯体脱脂后采用浸渗工艺使坯体渗入金属离子，以提高坯体密度并成功引入第二相，有利于制备致密度高、晶粒细小、微观结构均匀的AlN陶瓷，提高其力学性能和抗热震性能。本发明的方法中，还包括对烧结得到的烧结体进行热等静压处理，进一步提高了氮化铝陶瓷的强度和硬度，最终得到具有高性能的氮化铝陶瓷。
Method for preparing aluminum nitride ceramic by adhesive spray molding technology
一种粘接剂喷射成型技术制备氮化铝陶瓷的方法
WU SHANGHUA (Autor:in) / JIANG CHEN (Autor:in) / LIN KUNJI (Autor:in) / ZONG XIAO (Autor:in) / QI YUJIE (Autor:in)
03.11.2023
Patent
Elektronische Ressource
Chinesisch
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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