A Seawater‐Corrosion‐Resistant and Isotropic Zero Thermal Expansion (Zr,Ta)(Fe,Co)2 Alloy
Source abstract
Abstract
Abstract Zero thermal expansion (ZTE) alloys as dimensionally stable materials are usually challenged by harsh environmental erosion, since ZTE and corrosion resistance are generally mutually exclusive. Here, a high‐performance alloy, Zr0.8Ta0.2Fe1.7Co0.3, is reported, that shows isotropic ZTE behavior (αl = 0.21(2) × 10−6 K−1) in a wide temperature range of 5–360 K, high corrosion resistance in a seawater‐like solution compared with classic Invar and stainless Invar, and excellent cyclic thermal and structural stabilities. Such stabilities are attributed to the cubic symmetry, the controllable magnetic order, and the spontaneously formed passive film with Ta and Zr chemical modifications. The results are evidenced by X‐ray/neutron diffraction, microscopy, spectroscopy, and electrochemistry investigations. Such multiple stabilities have the potential to broaden the robust applications of ZTE alloys, especially in marine services.
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Research context
OpenAlex topics: Thermal Expansion and Ionic Conductivity · Thermodynamic and Structural Properties of Metals and Alloys · Advanced Battery Materials and Technologies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Beijing Advanced Innovation Center for Materials Genome Engineering, and Institute of Solid State Chemistry University of Science and Technology Beijing Beijing 100083 China
Neutron Group National Synchrotron Radiation Research Center Hsinchu 30076 Australia
RIKEN SPring‐8 Center 1‐1‐1 Kouto Sayo‐cho, Sayo‐gun Hyogo 679‐5148 Japan
JST, PRESTO 4‐1‐8 Honcho Kawaguchi Saitama 332‐0012 Japan
Neutron Scattering Division Oak Ridge National Laboratory Oak Ridge TN 37831 USA
Institution of Physics Chinese Academic of Science No. 8, 3rd South Street, Zhongguancun, Haidian District Beijing 100190 P. R. China
Funding
National Natural Science Foundation of China
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