The development of polymeric coatings for brittle substrates such as ceramics or glass is an important technological goal, the aim of which is to provide protection or enhance the mechanical properties of the substrate. In this work we propose a novel one-step approach, evaporation-driven self-assembly of polymers, to coat Al₂O₃ substrates with a thin nanocomposite coating. The films consist of polyvinyl butyrate polymer and either multi-walled carbon or tungsten disulfide nanotubes, which are found to improve both the strength and toughness of the brittle alumina substrates via crack bridging and crack propagation inhibition mechanisms.

中文翻译：

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用于脆性材料的纳米复合薄膜涂料

用于脆性基材例如陶瓷或玻璃的聚合物涂层的开发是重要的技术目标，其目的是提供保护或增强基材的机械性能。在这项工作中，我们提出了一种新颖的一步法，即聚合物的蒸发驱动自组装，以用薄的纳米复合材料涂层涂覆Al ₂ O ₃基体。该膜由聚乙烯醇丁酸酯聚合物和多壁碳或二硫化钨纳米管组成，发现它们通过裂纹桥接和裂纹扩展抑制机制可改善脆性氧化铝基材的强度和韧性。