Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
3D printing graphite product densification method
The invention belongs to the technical field of additive manufacturing, and particularly relates to a binder injection 3D printing graphite product densification method which comprises the specific steps of graphite composite powder manufacturing, green body printing, impregnation recarburization treatment and gas-phase carburization densification treatment. The preparation method comprises the following steps: preparing graphite by using pyrolytic carbon, performing high-temperature pyrolysis to obtain a pyrolytic carbon-coated graphite composite material mixture, crushing to obtain pyrolytic carbon-graphite composite material powder, and granulating the lamellar graphite powder into particles by using the granulation method so as to improve the natural stacking density of the graphite material. Then, the granulated graphite composite powder is formed into a graphite composite powder green body through binder jet 3D printing, and densification of the graphite composite powder green body is achieved step by step through the processes of precursor impregnation and pyrolysis, chemical vapor infiltration and the like, so that the density, strength and surface quality of a binder jet 3D printing graphite product are remarkably improved.
本发明属于增材制造技术领域，特别涉及一种粘结剂喷射3D打印石墨制品致密化方法，具体步骤包括制作石墨复合粉末、打印生坯、浸渍增碳处理、气相渗碳致密化处理，首先制作石墨复合粉末即造粒的方法，是将树脂与石墨原材料均匀混合，之后通过高温热解得到热解碳包裹石墨的复合材料混合物，经过破碎后获得热解碳石墨复合材料粉末，通过这样的造粒方法将层片状的石墨粉造粒成颗粒状，以提高石墨材料的自然堆积密度。然后通过粘结剂喷射3D打印将造粒石墨复合粉末成型形成石墨复合粉末生坯，并通过驱体浸渍裂解、化学气相渗透等工艺分步实现石墨复合粉末生坯的致密化，以显著提高结剂喷射3D打印石墨制品密度与强度以及表面质量。
3D printing graphite product densification method
The invention belongs to the technical field of additive manufacturing, and particularly relates to a binder injection 3D printing graphite product densification method which comprises the specific steps of graphite composite powder manufacturing, green body printing, impregnation recarburization treatment and gas-phase carburization densification treatment. The preparation method comprises the following steps: preparing graphite by using pyrolytic carbon, performing high-temperature pyrolysis to obtain a pyrolytic carbon-coated graphite composite material mixture, crushing to obtain pyrolytic carbon-graphite composite material powder, and granulating the lamellar graphite powder into particles by using the granulation method so as to improve the natural stacking density of the graphite material. Then, the granulated graphite composite powder is formed into a graphite composite powder green body through binder jet 3D printing, and densification of the graphite composite powder green body is achieved step by step through the processes of precursor impregnation and pyrolysis, chemical vapor infiltration and the like, so that the density, strength and surface quality of a binder jet 3D printing graphite product are remarkably improved.
本发明属于增材制造技术领域，特别涉及一种粘结剂喷射3D打印石墨制品致密化方法，具体步骤包括制作石墨复合粉末、打印生坯、浸渍增碳处理、气相渗碳致密化处理，首先制作石墨复合粉末即造粒的方法，是将树脂与石墨原材料均匀混合，之后通过高温热解得到热解碳包裹石墨的复合材料混合物，经过破碎后获得热解碳石墨复合材料粉末，通过这样的造粒方法将层片状的石墨粉造粒成颗粒状，以提高石墨材料的自然堆积密度。然后通过粘结剂喷射3D打印将造粒石墨复合粉末成型形成石墨复合粉末生坯，并通过驱体浸渍裂解、化学气相渗透等工艺分步实现石墨复合粉末生坯的致密化，以显著提高结剂喷射3D打印石墨制品密度与强度以及表面质量。
3D printing graphite product densification method
一种3D打印石墨制品致密化方法
CAO JIWEI (Autor:in) / HE YUYU (Autor:in) / LIU YUQING (Autor:in) / WANG YONG (Autor:in) / LUO KAI (Autor:in) / ZHANG YUNYUN (Autor:in) / ZHANG LONGJIANG (Autor:in)
19.12.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
/
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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