Anomalous expansion of Nb nanowires in a NiTi matrix under high pressure [electronic resource].
- Beijing, China : National Natural Science Foundation of China (NSFC), 2016. and Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
- Physical Description:
- Article numbers 161,903 : digital, PDF file
- Additional Creators:
- Argonne National Laboratory, National Natural Science Foundation of China (NSFC), United States. National Nuclear Security Administration, United States. Department of Energy. Office of Basic Energy Sciences, and United States. Department of Energy. Office of Scientific and Technical Information
- Under high pressure, materials usually shrink during compression as described by an equation of state. Here, we present the anomalous volume expansion behavior of a one-dimensional Nb nanowire embedded in a NiTi transforming matrix, while the matrix undergoes a pressure-induced martensitic transformation. The Nb volume expansion depends on the NiTi transition pressure range from the matrix, which is controlled by the shear strain induced by different pressure transmitting media. The transformation-induced interfacial stresses between Nb and NiTi may play a major role in this anomaly. In conclusion, our discovery sheds new light on the nano-interfacial effect on mechanical anomalies in heterogeneous systems during a pressure-induced phase transition.
- Published through SciTech Connect., 10/17/2016., "137798", Applied Physics Letters 109 16 ISSN 0003-6951 AM, and Cun Yu; Yang Ren; Lishan Cui; Zhiyuan Ma; Wenge Yang.
- Funding Information:
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