Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
High-strength silicon nitride ceramic and preparation method thereof
The invention discloses high-strength silicon nitride ceramic and a preparation method thereof. The method comprises the following steps: firstly, carrying out spray granulation on silicon nitride powder and a sintering aid, then mixing resin powder and curing agent powder, then preparing a ceramic green body through SLS in 3D printing, and treating the ceramic green body through a cold isostatic pressing technology twice, so that the porosity in the ceramic green body is reduced, and the density of the ceramic green body is improved; before cold isostatic pressing, sleeving the ceramic body with a rubber sleeve, wherein the rubber sleeve can prevent water or oil from entering the surface of the body in the cold isostatic pressing process; after isostatic cool pressing, arranging ceramic body particles more tightly, so that the density is improved; so that mechanical properties of a test piece are improved; removing resin in the ceramic body through degreasing; finally, removing a small amount of silicon on the siliconized surface of the component through physical grinding and polishing or chemical corrosion, so that the size precision of the test piece is improved; and the steps are simple and easy to implement.
本发明公开了一种高强度氮化硅陶瓷及其制备方法。该方法首先将氮化硅粉末和烧结助剂进行喷雾造粒，然后将树脂粉和固化剂粉末混合后通过3D打印中的SLS制备出陶瓷坯体，通过两次冷等静压技术处理陶瓷坯体，降低陶瓷坯体中的孔隙率，提高陶瓷坯体的致密度；冷等静压前，将陶瓷坯体套上橡胶套，橡胶套能够避免冷等静压过程中水或油进入到坯体表面；冷等静压后，陶瓷坯体颗粒之间的排列更为紧密，致密度得到提高；提升试件力学性能；通过脱脂能够去除陶瓷坯体中的树脂；最后通过物理打磨抛光或化学腐蚀去除构件在渗硅后表面少量的硅，提高试件尺寸精度；步骤简单，易于实现。
High-strength silicon nitride ceramic and preparation method thereof
The invention discloses high-strength silicon nitride ceramic and a preparation method thereof. The method comprises the following steps: firstly, carrying out spray granulation on silicon nitride powder and a sintering aid, then mixing resin powder and curing agent powder, then preparing a ceramic green body through SLS in 3D printing, and treating the ceramic green body through a cold isostatic pressing technology twice, so that the porosity in the ceramic green body is reduced, and the density of the ceramic green body is improved; before cold isostatic pressing, sleeving the ceramic body with a rubber sleeve, wherein the rubber sleeve can prevent water or oil from entering the surface of the body in the cold isostatic pressing process; after isostatic cool pressing, arranging ceramic body particles more tightly, so that the density is improved; so that mechanical properties of a test piece are improved; removing resin in the ceramic body through degreasing; finally, removing a small amount of silicon on the siliconized surface of the component through physical grinding and polishing or chemical corrosion, so that the size precision of the test piece is improved; and the steps are simple and easy to implement.
本发明公开了一种高强度氮化硅陶瓷及其制备方法。该方法首先将氮化硅粉末和烧结助剂进行喷雾造粒，然后将树脂粉和固化剂粉末混合后通过3D打印中的SLS制备出陶瓷坯体，通过两次冷等静压技术处理陶瓷坯体，降低陶瓷坯体中的孔隙率，提高陶瓷坯体的致密度；冷等静压前，将陶瓷坯体套上橡胶套，橡胶套能够避免冷等静压过程中水或油进入到坯体表面；冷等静压后，陶瓷坯体颗粒之间的排列更为紧密，致密度得到提高；提升试件力学性能；通过脱脂能够去除陶瓷坯体中的树脂；最后通过物理打磨抛光或化学腐蚀去除构件在渗硅后表面少量的硅，提高试件尺寸精度；步骤简单，易于实现。
High-strength silicon nitride ceramic and preparation method thereof
一种高强度氮化硅陶瓷及其制备方法
WANG KEJIE (Autor:in) / LU BINGHENG (Autor:in) / BAO CHONGGAO (Autor:in) / LIU RONGZHEN (Autor:in)
25.02.2022
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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