Crystallographic orientation manipulation enables wide-temperature-range negative thermal expansion in lightweight AlFe <sub>2</sub> B <sub>2</sub> -based alloys

The present study demonstrates a remarkable synergy between a wide temperature span of negative thermal expansion (Δ<i>T</i><sub>NTE</sub>) and a lightweight character in the Al<sub>1-<i>x</i></sub>Ge<i><sub>x</sub></i>Fe<sub>2</sub>B<sub>2</sub> alloys. This is realized by introducing a &lt; 001 &gt; crystallographic texture in the Al<sub>1-<i>x</i></sub>Ge<sub>x</sub>Fe<sub>2</sub>B<sub>2</sub> alloys using the directional-solidification method. The Al<sub>0.9</sub>Ge<sub>0.1</sub>Fe<sub>2</sub>B<sub>2</sub> alloy exhibits a macroscopic NTE coefficient of −16.2 × 10<sup>−6</sup> K<sup>−1</sup> over a wide temperature range of 211 K, spanning from 120 to 331 K. This represents the largest Δ<i>T</i><sub>NTE</sub> among NTE magnetic alloys. Besides, the density of the Al<sub>1-<i>x</i></sub>Ge<sub>x</sub>Fe<sub>2</sub>B<sub>2</sub> alloys is only 5.69 g/cm<sup>3</sup>, which is among the lowest for NTE magnetic alloys. © 2025 The Author(s). Published by Informa UK Limited, trading as Taylor &amp; Francis Group.

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Publication Details

Journal
Materials Research Letters
Published
2025-03-20
DOI
https://doi.org/10.1080/21663831.2025.2479211
Citations
1
Primary Topic
Thermal Expansion and Ionic Conductivity
Type
article
Field-Weighted Citation Impact
0.52

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article

Crystallographic orientation manipulation enables wide-temperature-range negative thermal expansion in lightweight AlFe 2 B 2 -based alloys

Yunlong Chen, Feng Xu, Jiaju Zha, Yuanyuan Gong et al.
1 citations
Materials Research Letters
Thermal Expansion and Ionic Conductivity
0.52
article

Crystallographic orientation manipulation enables wide-temperature-range negative thermal expansion in lightweight AlFe 2 B 2 -based alloys

Yunlong Chen, Feng Xu, Jiaju Zha, Yuanyuan Gong, Xuefei Miao, Yong Gong, Kang Tian, Fengqi Zhang, Zhubing Yan
article en
1 citations

Abstract

The present study demonstrates a remarkable synergy between a wide temperature span of negative thermal expansion (Δ<i>T</i><sub>NTE</sub>) and a lightweight character in the Al<sub>1-<i>x</i></sub>Ge<i><sub>x</sub></i>Fe<sub>2</sub>B<sub>2</sub> alloys. This is realized by introducing a &lt; 001 &gt; crystallographic texture in the Al<sub>1-<i>x</i></sub>Ge<sub>x</sub>Fe<sub>2</sub>B<sub>2</sub> alloys using the directional-solidification method. The Al<sub>0.9</sub>Ge<sub>0.1</sub>Fe<sub>2</sub>B<sub>2</sub> alloy exhibits a macroscopic NTE coefficient of −16.2 × 10<sup>−6</sup> K<sup>−1</sup> over a wide temperature range of 211 K, spanning from 120 to 331 K. This represents the largest Δ<i>T</i><sub>NTE</sub> among NTE magnetic alloys. Besides, the density of the Al<sub>1-<i>x</i></sub>Ge<sub>x</sub>Fe<sub>2</sub>B<sub>2</sub> alloys is only 5.69 g/cm<sup>3</sup>, which is among the lowest for NTE magnetic alloys. © 2025 The Author(s). Published by Informa UK Limited, trading as Taylor &amp; Francis Group.

Materials Research LettersVol. 13(5)
City University of Hong Kong (HK), Nanjing University of Science and Technology (CN)
National Natural Science Foundation of China, Natural Science Foundation of Jiangsu Province, Fundamental Research Funds for the Central Universities
Affordable and clean energy
Openalex Percentile: Top 41%
Thermal Expansion and Ionic Conductivity
0.52
DOIOpen Access PDFOpenAlex
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