| Autor: |
Rajyashree Sundaram, Takeo Yamada, Kenji Hata, Atsuko Sekiguchi |
| Jazyk: |
angličtina |
| Rok vydání: |
2020 |
| Předmět: |
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| Zdroj: |
Journal of Materials Research and Technology, Vol 9, Iss 3, Pp 6944-6949 (2020) |
| Druh dokumentu: |
article |
| ISSN: |
2238-7854 |
| DOI: |
10.1016/j.jmrt.2020.03.094 |
| Popis: |
We report for the first time the coefficient of thermal expansion (CTE) of Cu/carbon nanotube (Cu/CNT) macroscopic wire composites and its strong dependence on CNT-Cu mixing. Homogeneous composite wires with 40 vol% nanotubes uniformly mixed in continuous Cu matrix showed CTE ∼4.42 × 10−6 °C-1 (∼26% Cu-CTE and similar to Si-CTE). The value matches with Turner’s model predictions implying that when nanotube-Cu shared contact is high, both low thermal expansion and high bulk modulus of CNTs contribute to offsetting Cu thermal expansion. In contrast, absence of or non-uniform CNT-Cu mixing i.e., reduced shared interface led to higher wire-composite CTEs (∼53−92% Cu-CTE) even with higher CNT vol%. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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