State Key Laboratory of Heavy Oil Processing and Department of Materials Science and engineering, China University of Petroleum, Beijing 102249, China.
X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA.
Sci Rep. 2014 Jun 12;4:5267. doi: 10.1038/srep05267.
Creating multifunctional materials is an eternal goal of mankind. As the properties of monolithic materials are necessary limited, one route to extending them is to create a composite by combining contrasting materials. The potential of this approach is neatly illustrated by the formation of nature materials where contrasting components are combined in sophisticated hierarchical designs. In this study, inspired by the hierarchical structure of the tendon, we fabricated a novel composite by subtly combining two contrasting components: NiTi shape-memory alloy and Ag. The composite exhibits simultaneously exceptional mechanical properties of high strength, good superelasticity and high mechanical damping, and remarkable functional properties of high electric conductivity, high visibility under fluoroscopy and excellent thermal-driven ability. All of these result from the effective-synergy between the NiTi and Ag components, and place the composite in a unique position in the properties chart of all known structural-functional materials providing new opportunities for innovative electrical, mechanical and biomedical applications. Furthermore, this work may open new avenues for designing and fabricating advanced multifunctional materials by subtly combining contrasting multi-components.
创造多功能材料是人类永恒的目标。由于整体材料的性能受到固有限制，扩展其性能的一种途径是通过组合具有对比性的材料来制造复合材料。这种方法的潜力在自然界材料的形成中得到了很好的体现，其中具有对比性的成分以复杂的层次设计结合在一起。在这项研究中，受肌腱分层结构的启发，我们巧妙地结合了两种具有对比性的成分：形状记忆合金 NiTi 和 Ag，制备了一种新型复合材料。该复合材料同时具有优异的机械性能，高强度、良好的超弹性和高机械阻尼，以及显著的功能特性，包括高导电性、在透视下的高可见度和出色的热驱动能力。所有这些都源于 NiTi 和 Ag 成分之间的有效协同作用，使该复合材料在所有已知结构-功能材料的性能图表中处于独特的地位，为创新的电气、机械和生物医学应用提供了新的机会。此外，这项工作可能为通过巧妙地组合具有对比性的多成分来设计和制造先进的多功能材料开辟新途径。
