Designing Ni<sub>2</sub>MnSn Heusler magnetic nanoprecipitate in copper alloy for increased strength and electromagnetic shielding.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 39622803.
- Also identified by DOI 10.1038/s41467-024-54904-9 and PMC identifier 11612424.
- Licence recorded as CC BY-NC-ND.
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Abstract
Structural electromagnetic shielding materials are required to withstand high stress and electromagnetic interference in extreme environments. In this paper, a nano-magnetic Heusler phase with desired structure parameters was successfully obtained in a copper matrix by employing a multi-objective driving design strategy. The resulting copper alloy exhibits a yield strength of up to 1.5 GPa, and the attenuation degree of electromagnetic wave reaches 99.999999999% (110 dB) within the frequency range of 10 kHz to 3 GHz. The research suggests that the Ni<sub>2</sub>MnSn precipitates with optimized structure parameters (including high number density: 5 × 10<sup>23 </sup>m<sup>-3</sup>, small size: 23 nm, large aspect ratio: 4, low mismatch: 2.3%, strong bonding: -0.316 eV/atom, magnetic order: 4.05 μ<sub>B</sub>/f.u.) both reinforce the matrix by strong pinning and enhance electromagnetic shielding properties through magnetic-electric coupling. This design method tailored for multiple performance requirements provides a valuable tool for the development of structure-function integrated materials.