Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Ultrahigh-temperature ceramic prepreg and ultrahigh-temperature ceramic, and preparation methods thereof
The invention relates to an ultrahigh-temperature ceramic prepreg and an ultrahigh-temperature ceramic, and preparation methods thereof. The preparation method of the ultrahigh-temperature ceramic prepreg comprises the following steps: ball-milling and mixing raw materials of the ultra-high-temperature ceramic prepreg and a solvent, adjusting the pH value to 7.5-9.0, controlling the viscosity value to 200-800 CPS, spray-drying, and sieving to obtain the ultrahigh-temperature ceramic prepreg. The ultrahigh-temperature ceramic prepreg is prepared from, by mass, 90.60 to 97.55 parts of ultrahigh-temperature ceramic powder, 1.45 to 6.25 parts of organic resin and 0.75 to 3.25 parts of carbon black. The method for preparing the ultrahigh-temperature ceramic from the ultra-high-temperature ceramic prepreg comprises the following steps: molding the ultrahigh-temperature ceramic prepreg, carbonizing, and carrying out liquid-phase silicon infiltration, wherein the bending strength of a carbon-containing preform is greater than 50 MPa, and the porosity is less than 0.5%. The ultrahigh-temperature ceramic prepreg disclosed by the invention has the characteristics of long-term storage, easiness in forming, high blank strength after biscuiting, good processability, large-scale production and the like, and near-net-size forming and rapid densification of ultrahigh-temperature ceramic are realized.
本发明是关于一种超高温陶瓷预浸料、超高温陶瓷及其制备方法，该超高温陶瓷预浸料的制备方法包括：将超高温陶瓷预浸料的原料与溶剂球磨混合，调节pH值至7.5‑9.0，并控制粘度值为200‑800CPS，经喷雾干燥、过筛，得到超高温陶瓷预浸料，其中，所述的超高温陶瓷预浸料的原料，以质量份数计，包括：超高温陶瓷粉体90.60‑97.55份、有机树脂1.45‑6.25份和炭黑0.75‑3.25份。用其制备超高温陶瓷的方法包括通过将所述的超高温陶瓷预浸料成型、碳化和液相硅浸渗，其中含碳预制体的弯曲强度大于50MPa，孔隙率小于0.5％。本发明的超高温陶瓷预浸料具有可长期存储、易成型、素烧后坯体强度高、加工性能好、可规模化生产等特点，实现超高温陶瓷的近净尺寸成型和快速致密化。
Ultrahigh-temperature ceramic prepreg and ultrahigh-temperature ceramic, and preparation methods thereof
The invention relates to an ultrahigh-temperature ceramic prepreg and an ultrahigh-temperature ceramic, and preparation methods thereof. The preparation method of the ultrahigh-temperature ceramic prepreg comprises the following steps: ball-milling and mixing raw materials of the ultra-high-temperature ceramic prepreg and a solvent, adjusting the pH value to 7.5-9.0, controlling the viscosity value to 200-800 CPS, spray-drying, and sieving to obtain the ultrahigh-temperature ceramic prepreg. The ultrahigh-temperature ceramic prepreg is prepared from, by mass, 90.60 to 97.55 parts of ultrahigh-temperature ceramic powder, 1.45 to 6.25 parts of organic resin and 0.75 to 3.25 parts of carbon black. The method for preparing the ultrahigh-temperature ceramic from the ultra-high-temperature ceramic prepreg comprises the following steps: molding the ultrahigh-temperature ceramic prepreg, carbonizing, and carrying out liquid-phase silicon infiltration, wherein the bending strength of a carbon-containing preform is greater than 50 MPa, and the porosity is less than 0.5%. The ultrahigh-temperature ceramic prepreg disclosed by the invention has the characteristics of long-term storage, easiness in forming, high blank strength after biscuiting, good processability, large-scale production and the like, and near-net-size forming and rapid densification of ultrahigh-temperature ceramic are realized.
本发明是关于一种超高温陶瓷预浸料、超高温陶瓷及其制备方法，该超高温陶瓷预浸料的制备方法包括：将超高温陶瓷预浸料的原料与溶剂球磨混合，调节pH值至7.5‑9.0，并控制粘度值为200‑800CPS，经喷雾干燥、过筛，得到超高温陶瓷预浸料，其中，所述的超高温陶瓷预浸料的原料，以质量份数计，包括：超高温陶瓷粉体90.60‑97.55份、有机树脂1.45‑6.25份和炭黑0.75‑3.25份。用其制备超高温陶瓷的方法包括通过将所述的超高温陶瓷预浸料成型、碳化和液相硅浸渗，其中含碳预制体的弯曲强度大于50MPa，孔隙率小于0.5％。本发明的超高温陶瓷预浸料具有可长期存储、易成型、素烧后坯体强度高、加工性能好、可规模化生产等特点，实现超高温陶瓷的近净尺寸成型和快速致密化。
Ultrahigh-temperature ceramic prepreg and ultrahigh-temperature ceramic, and preparation methods thereof
超高温陶瓷预浸料、超高温陶瓷及其制备方法
YANG TAISHENG (Autor:in) / WANG CHUNPENG (Autor:in) / WANG HAORAN (Autor:in) / HU LIMING (Autor:in) / LIU HAILIN (Autor:in) / CHEN YUFENG (Autor:in) / WANG HUA (Autor:in) / HU CHUANQI (Autor:in)
29.10.2021
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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