Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Selective laser sintering biphase toughened SiC ceramic and preparation method thereof
The invention discloses selective laser sintering biphase toughened SiC ceramic and a preparation method thereof, the biphase toughened SiC ceramic is composed of an MAX phase, carbon fibers and a SiC matrix, the mass fraction of the MAX phase is 5-23%, and the mass fraction of the carbon fibers is 5-23%. The preparation method comprises the following steps: firstly, coating the surfaces of MAX-phase ceramic powder and short carbon fibers with silicon carbide interface layers by adopting a chemical vapor deposition method respectively, then uniformly mixing the MAX-phase ceramic powder and the short carbon fibers with SiC ceramic powder and an adhesive to prepare a core-shell structure, and then preparing a SiC ceramic biscuit by adopting a selective laser sintering technology; and finally, carrying out pre-sintering carbonization and high-temperature liquid silicon infiltration to obtain the double-phase toughened SiC ceramic material. The MAX-phase special lamellar structure and the short carbon fiber strip-shaped structure jointly play a role in deflecting and passivating crack propagation, the silicon carbide interface layer plays a role in protecting the toughening phase in subsequent high-temperature liquid silicon infiltration, the strength, fracture toughness, high temperature resistance and friction resistance of the SiC ceramic are improved, the density is reduced, and the service life of the SiC ceramic is prolonged. The requirements of the aerospace field on a light high-strength SiC ceramic structure material are met.
本发明公开了一种激光选区烧结双相增韧SiC陶瓷及其制备方法，双相增韧SiC陶瓷由MAX相、碳纤维与SiC基体组成，MAX相质量分数5‑23％，碳纤维质量分数5‑23％。首先采用化学气相沉积方法分别在MAX相陶瓷粉末和短切碳纤维表面包覆碳化硅界面层，然后将二者与SiC陶瓷粉末、粘接剂混合均匀并制成核壳结构，再采用激光选区烧结技术制备SiC陶瓷素坯，最后通过预烧结碳化和高温液硅熔渗得到双相增韧SiC陶瓷材料。本发明利用MAX相特殊层片状结构和短切碳纤维条状结构共同对裂纹的扩展起到偏转和钝化作用，碳化硅界面层在后续高温液硅熔渗中对增韧相起保护作用，提升SiC陶瓷的强度、断裂韧性、耐高温性和耐摩擦性，降低密度，满足航空航天领域对轻质高强SiC陶瓷结构材料需求。
Selective laser sintering biphase toughened SiC ceramic and preparation method thereof
The invention discloses selective laser sintering biphase toughened SiC ceramic and a preparation method thereof, the biphase toughened SiC ceramic is composed of an MAX phase, carbon fibers and a SiC matrix, the mass fraction of the MAX phase is 5-23%, and the mass fraction of the carbon fibers is 5-23%. The preparation method comprises the following steps: firstly, coating the surfaces of MAX-phase ceramic powder and short carbon fibers with silicon carbide interface layers by adopting a chemical vapor deposition method respectively, then uniformly mixing the MAX-phase ceramic powder and the short carbon fibers with SiC ceramic powder and an adhesive to prepare a core-shell structure, and then preparing a SiC ceramic biscuit by adopting a selective laser sintering technology; and finally, carrying out pre-sintering carbonization and high-temperature liquid silicon infiltration to obtain the double-phase toughened SiC ceramic material. The MAX-phase special lamellar structure and the short carbon fiber strip-shaped structure jointly play a role in deflecting and passivating crack propagation, the silicon carbide interface layer plays a role in protecting the toughening phase in subsequent high-temperature liquid silicon infiltration, the strength, fracture toughness, high temperature resistance and friction resistance of the SiC ceramic are improved, the density is reduced, and the service life of the SiC ceramic is prolonged. The requirements of the aerospace field on a light high-strength SiC ceramic structure material are met.
本发明公开了一种激光选区烧结双相增韧SiC陶瓷及其制备方法，双相增韧SiC陶瓷由MAX相、碳纤维与SiC基体组成，MAX相质量分数5‑23％，碳纤维质量分数5‑23％。首先采用化学气相沉积方法分别在MAX相陶瓷粉末和短切碳纤维表面包覆碳化硅界面层，然后将二者与SiC陶瓷粉末、粘接剂混合均匀并制成核壳结构，再采用激光选区烧结技术制备SiC陶瓷素坯，最后通过预烧结碳化和高温液硅熔渗得到双相增韧SiC陶瓷材料。本发明利用MAX相特殊层片状结构和短切碳纤维条状结构共同对裂纹的扩展起到偏转和钝化作用，碳化硅界面层在后续高温液硅熔渗中对增韧相起保护作用，提升SiC陶瓷的强度、断裂韧性、耐高温性和耐摩擦性，降低密度，满足航空航天领域对轻质高强SiC陶瓷结构材料需求。
Selective laser sintering biphase toughened SiC ceramic and preparation method thereof
一种激光选区烧结双相增韧SiC陶瓷及其制备方法
YANG LIXIA (Autor:in) / WEN GUOQIANG (Autor:in) / LIU TIANLONG (Autor:in) / CHEN ZHAOFENG (Autor:in)
27.05.2022
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
| Europäisches Patentamt | 2024
Biphase compound coating and preparation method thereof
| Europäisches Patentamt | 2024
Toughened mullite ceramic and preparation method thereof
| Europäisches Patentamt | 2024
Graphene toughened ceramic and preparation method thereof
| Europäisches Patentamt | 2020