一种耐海水腐蚀且各向同性的零热膨胀(Zr,Ta)(Fe,Co)合金。
A Seawater-Corrosion-Resistant and Isotropic Zero Thermal Expansion (Zr,Ta)(Fe,Co) Alloy.
作者信息
Li Wenjie, Lin Kun, Yan Yu, Yu Chengyi, Cao Yili, Chen Xin, Wang Chin-Wei, Kato Kenichi, Chen Yan, An Ke, Zhang Qinghua, Gu Lin, Li Qiang, Deng Jinxia, Xing Xianran
机构信息
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.
出版信息
Adv Mater. 2022 Aug;34(34):e2109592. doi: 10.1002/adma.202109592. Epub 2022 Jul 20.
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, Zr Ta Fe Co , is reported, that shows isotropic ZTE behavior (α = 0.21(2) × 10 K ) 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.
零热膨胀（ZTE）合金作为尺寸稳定的材料，通常会受到恶劣环境侵蚀的挑战，因为ZTE和耐腐蚀性通常是相互排斥的。在此，报道了一种高性能合金Zr Ta Fe Co，它在5 - 360 K的宽温度范围内表现出各向同性的ZTE行为（α = 0.21(2)×10⁻⁶ K⁻¹），与经典因瓦合金和不锈因瓦合金相比，在类似海水的溶液中具有高耐腐蚀性，以及出色的循环热稳定性和结构稳定性。这种稳定性归因于立方对称性、可控的磁有序以及通过Ta和Zr化学改性自发形成的钝化膜。X射线/中子衍射、显微镜、光谱学和电化学研究证实了这些结果。这种多重稳定性有可能拓宽ZTE合金的稳健应用范围，特别是在海洋服务领域。
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