Colossal negative thermal expansion over a wide temperature span in dynamically self-assembled MnCo(Ge,Si)/epoxy composites
The achievement of significant negative thermal expansion (NTE) over a wide temperature range (ΔTNTE) has posed a formidable challenge for NTE materials. In the present study, textured MnCo(Ge,Si)/epoxy composites were prepared by magnetic field-assisted dynamic self-assembly of multi-component Mn0....
Saved in:
Published in | Materials research letters Vol. 12; no. 4; pp. 315 - 323 |
---|---|
Main Authors | , , , , , , , |
Format | Journal Article |
Language | English |
Published |
New York
Taylor & Francis Ltd
02.04.2024
Taylor & Francis Group |
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | The achievement of significant negative thermal expansion (NTE) over a wide temperature range (ΔTNTE) has posed a formidable challenge for NTE materials. In the present study, textured MnCo(Ge,Si)/epoxy composites were prepared by magnetic field-assisted dynamic self-assembly of multi-component Mn0.945Co1.055Ge1-xSix particles. The utilization of multi-component particles with tunable transition temperatures significantly amplifies the temperature range over which the NTE occurs, surpassing the limitations of conventional single-component composites. The textured microstructure enables the extension of lattice-level NTE to reach the macroscopic level, which is manifested by a remarkably large NTE coefficient of −328.7 × 10−6/K between 288.2 and 431.1 K. |
---|---|
ISSN: | 2166-3831 2166-3831 |
DOI: | 10.1080/21663831.2024.2328375 |