| Autor: |
Fei-Ran Shen, Hao Kuang, Feng-Xia Hu, Hui Wu, Qing-Zhen Huang, Fei-Xiang Liang, Kai-Ming Qiao, Jia Li, Jing Wang, Yao Liu, Lei Zhang, Min He, Ying Zhang, Wen-Liang Zuo, Ji-Rong Sun, Bao-Gen Shen |
| Jazyk: |
angličtina |
| Rok vydání: |
2017 |
| Předmět: |
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| Zdroj: |
APL Materials, Vol 5, Iss 10, Pp 106102-106102-8 (2017) |
| Druh dokumentu: |
article |
| ISSN: |
2166-532X |
| DOI: |
10.1063/1.4990481 |
| Popis: |
Materials with zero thermal expansion (ZTE) or precisely tailored thermal expansion are in urgent demand of modern industries. However, the overwhelming majority of materials show positive thermal expansion. To develop ZTE or negative thermal expansion (NTE) materials as compensators has become an important challenge. Here, we present the evidence for the realization of ultra-low thermal expansion in Mn–Co–Ge–In particles. The bulk with the Ni2In-type hexagonal structure undergoes giant NTE owing to a martensitic magnetostructural transition. The major finding is that the thermal expansion behavior can be totally controlled by modulating the crystallinity degree and phase transition from atomic scale. Self-compensation effect leads to ultra-low thermal expansion with a linear expansion coefficient as small as +0.68 × 10−6/K over a wide temperature range around room temperature. The present study opens an avenue to reach ZTE particularly from the large class of giant NTE materials based on phase transition. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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