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Method for preparing continuous carbon fiber toughened ultrahigh-temperature ceramic-based composite material through electrophoretic deposition
The invention belongs to the field of ultrahigh-temperature ceramic matrix composite materials, and particularly relates to a method for preparing a continuous carbon fiber toughened ultrahigh-temperature ceramic matrix composite material by electrophoretic deposition. The method comprises the following steps: preparing a polydopamine coating on carbon fibers; secondly, adsorbing polyethyleneimineon the surface of the ultrahigh-temperature ceramic powder and electrifying the ultrahigh-temperature ceramic powder; then, uniformly depositing charged ultrahigh-temperature ceramic powder on the carbon fiber containing the polydopamine coating through an electrophoretic deposition technology; and finally, carrying out hot pressed sintering to obtain the compact continuous carbon fiber toughenedultrahigh-temperature ceramic-based composite material. The preparation method has the effects and benefits that firstly, the ultrahigh-temperature ceramic powder is effectively introduced into the carbon fiber bundle so that the problem that the continuous carbon fiber toughened ultrahigh-temperature ceramic-based composite material is difficult to densify in preparation is solved; and secondly,chemical corrosion of the carbon fibers is avoided, matrix components are optimized, a good fiber-matrix interface is obtained, and the fracture resistance and the ultra-high temperature resistance of the composite material are improved.
本发明属于超高温陶瓷基复合材料领域，具体涉及一种电泳沉积制备连续碳纤维增韧超高温陶瓷基复合材料的方法，首先在碳纤维上制备聚多巴胺涂层；其次利用聚乙烯亚胺吸附在超高温陶瓷粉体表面并使超高温陶瓷粉体带电；然后通过电泳沉积技术将带电的超高温陶瓷粉体均匀的沉积在含有聚多巴胺涂层的碳纤维上；最后通过热压烧结得到致密的连续碳纤维增韧超高温陶瓷基复合材料。本发明的效果和益处：其一，有效的将超高温陶瓷粉体引入到碳纤维束的内部，解决了连续碳纤维增韧超高温陶瓷基复合材料制备中难以致密化的问题；其二，避免了碳纤维受到的化学腐蚀，优化了基体组分，获得了良好的纤维‑基体界面，提升了复合材料的抗断裂性能和耐超高温性能。
Method for preparing continuous carbon fiber toughened ultrahigh-temperature ceramic-based composite material through electrophoretic deposition
The invention belongs to the field of ultrahigh-temperature ceramic matrix composite materials, and particularly relates to a method for preparing a continuous carbon fiber toughened ultrahigh-temperature ceramic matrix composite material by electrophoretic deposition. The method comprises the following steps: preparing a polydopamine coating on carbon fibers; secondly, adsorbing polyethyleneimineon the surface of the ultrahigh-temperature ceramic powder and electrifying the ultrahigh-temperature ceramic powder; then, uniformly depositing charged ultrahigh-temperature ceramic powder on the carbon fiber containing the polydopamine coating through an electrophoretic deposition technology; and finally, carrying out hot pressed sintering to obtain the compact continuous carbon fiber toughenedultrahigh-temperature ceramic-based composite material. The preparation method has the effects and benefits that firstly, the ultrahigh-temperature ceramic powder is effectively introduced into the carbon fiber bundle so that the problem that the continuous carbon fiber toughened ultrahigh-temperature ceramic-based composite material is difficult to densify in preparation is solved; and secondly,chemical corrosion of the carbon fibers is avoided, matrix components are optimized, a good fiber-matrix interface is obtained, and the fracture resistance and the ultra-high temperature resistance of the composite material are improved.
本发明属于超高温陶瓷基复合材料领域，具体涉及一种电泳沉积制备连续碳纤维增韧超高温陶瓷基复合材料的方法，首先在碳纤维上制备聚多巴胺涂层；其次利用聚乙烯亚胺吸附在超高温陶瓷粉体表面并使超高温陶瓷粉体带电；然后通过电泳沉积技术将带电的超高温陶瓷粉体均匀的沉积在含有聚多巴胺涂层的碳纤维上；最后通过热压烧结得到致密的连续碳纤维增韧超高温陶瓷基复合材料。本发明的效果和益处：其一，有效的将超高温陶瓷粉体引入到碳纤维束的内部，解决了连续碳纤维增韧超高温陶瓷基复合材料制备中难以致密化的问题；其二，避免了碳纤维受到的化学腐蚀，优化了基体组分，获得了良好的纤维‑基体界面，提升了复合材料的抗断裂性能和耐超高温性能。
Method for preparing continuous carbon fiber toughened ultrahigh-temperature ceramic-based composite material through electrophoretic deposition
一种电泳沉积制备连续碳纤维增韧超高温陶瓷基复合材料的方法
SHA JIANJUN (Autor:in) / LIU YINGJUN (Autor:in) / ZU YUFEI (Autor:in) / TIAN HONGLIANG (Autor:in) / DAI JIXIANG (Autor:in)
27.10.2020
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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