复合型陶瓷薄板的制备及其力学性能

作为一种轻薄、低能耗的功能化产品,陶瓷薄板因强度低而应用受限,如何对其进行低成本增强成为工业领域研究热点。本文以构筑“纤维布-黏结剂-陶瓷薄板”多层复合结构作为切入点,将多种工业级纤维布、黏结剂和陶瓷薄板进行二次后加工复合,制备了兼具低成本和优异力学性能的复合型陶瓷薄板,探究了其断裂面微观形貌及断裂机理。经研究表明,“碳纤维布-环氧树脂-陶瓷薄板”复合型陶瓷薄板具有最佳界面结合强度及力学性能,其抗弯强度和承载冲击能量分别为85.26 MPa和1.45 J,与陶瓷薄板坯体相比,性能提升幅度分别高达22.98%和141.67%。“纤维布-黏结剂-陶瓷薄板”多层复合结构能够有效提升陶瓷薄板综合力学性能,陶瓷薄板内部存在微裂纹拓展、纤维偏转等多种良性强韧化机制。

Preparation and Mechanical Properties of CompositeThin Ceramic Tile

Thin ceramic tiles are functional products with low energy consumption, but their application is limited by high breakage rate caused by low strength. In this case, it has become a research hotspot in ceramic industries to strengthen thin ceramic tiles with low cost. In this study, various kinds of fabrics and binders were optimized to prepare fabrics reinforced thin ceramic tiles with layered composite structure, which was proved to have low cost and excellent mechanical properties. Besides, the apparent morphology of cross-section and the fracture mechanism were investigated, respectively. It is observed that the composite thin ceramic tile with carbon fabric and epoxy resin as reinforcements has the best interface bonding strength and mechanical properties. And its bending strength is 85.26 MPa and the impact energy is 1.45 J, which are 22.98% and 141.67% higher than those of thin ceramic tiles green body. There are many positive strengthening and toughening mechanisms, such as microcrack expansion, fiber deflection and so on, which are conducive to improving the mechanical properties of thin ceramic tiles with fabrics and binders.