An isotropic zero thermal expansion alloy with super-high toughness.

ABSTRACT: Zero thermal expansion (ZTE) alloys with high mechanical response are crucial for their practical usage. Yet, unifying the ZTE behavior and mechanical response in one material is a grand obstacle, especially in multicomponent ZTE alloys. Herein, we report a near isotropic zero thermal expansion (α_l = 1.10 × 10^-6K^-1, 260-310 K) in the natural heterogeneous LaFe₅₄Co_3.5Si_3.35 alloy, which exhibits a super-high toughness of 277.8 ± 14.7 J cm^-3. Chemical partition, in the dual-phase structure, assumes the role of not only modulating thermal expansion through magnetic interaction but also enhancing mechanical properties via interface bonding. The comprehensive analysis reveals that the hierarchically synergistic enhanc

SUBMITTER: Yu C 

PROVIDER: S-EPMC10937970 | biostudies-literature | 2024 Mar

REPOSITORIES: biostudies-literature