A Kagome Metallic Composite Realizes Mechanically Axial Zero Thermal Expansion up to 800 K
Abstract
AbstractManipulating the crystal structure and microstructure is fundamentally paramount for designing advanced materials with enhanced functionalities. Kagome‐lattice metals attracted considerable attention due to desirable electronic and magnetic properties but are rarely considered for application as structural materials. In this study, a concept of kagome composite is proposed to realize mechanically zero thermal expansion (ZTE) alloy over a wide temperature window, exemplified by the Lu‐Fe‐Co ternary alloys prepared by two‐step synthesis. Using magnetic Co doping, the kagome lattice magnetic order is stabilized in the parent hexagonal Lu2Fe17 structure, and its thermal expansion regulated simultaneously. By in situ precipitation of the α‐(Fe/Co) phase in the matrix, a soft/hard heterogeneous structure emerges and an ultra‐wide temperature window axial ZTE composite (αl = +0.98 × 10−6 K−1, 110–800 K) with good compressive strength (1.11 GPa) is achieved. This work opens up the prospect of kagome intermetallic composite in the integration of structure and function.
Article Details
Authors (8)
Haowei Zhou
Institute of Solid State Chemistry
Yaozu Shen
State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing Beijing 100083 P. R. China
Yili Cao
Institute of Solid State Chemistry
Wanda Yang
Institute of Solid State Chemistry, Department of Physical Chemistry
Xinhui Sun
Institute of Solid State Chemistry, University of Science and Technology Beijing , Beijing 100083,
Chengyi Yu
Institute of Solid State Chemistry, Department of Physical Chemistry
Kun Lin
Institute of Solid State Chemistry
Xianran Xing
Institute of Solid State Chemistry