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Simultaneous enhancement of strength and conductivity via self-assembled lamellar architecture
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Journal Article
Simultaneous enhancement of strength and conductivity via self-assembled lamellar architecture
2024
Overview
Simultaneous improvement of strength and conductivity is urgently demanded but challenging for bimetallic materials. Here we show by creating a self-assembled lamellar (SAL) architecture in W-Cu system, enhancement in strength and electrical conductivity is able to be achieved at the same time. The SAL architecture features alternately stacked Cu layers and W lamellae containing high-density dislocations. This unique layout not only enables predominant stress partitioning in the W phase, but also promotes hetero-deformation induced strengthening. In addition, the SAL architecture possesses strong crack-buffering effect and damage tolerance. Meanwhile, it provides continuous conducting channels for electrons and reduces interface scattering. As a result, a yield strength that doubles the value of the counterpart, an increased electrical conductivity, and a large plasticity were achieved simultaneously in the SAL W-Cu composite. This study proposes a flexible strategy of architecture design and an effective method for manufacturing bimetallic composites with excellent integrated properties.
Simultaneous increase of mechanical and physical properties is highly desirable, but challenging for bimetallic materials. Here, the authors use W-Cu as an example to achieve both high strength and conductivity of the bimetal with a large plasticity by a self-assembled lamellar architecture.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
