Damping capacity of Al–12Si composites effected by negative thermal expansion of Y2W3O12 particle inclusions
| Autor: | Huijun Li, Chenguang Liu, Liming Yu, Chenxi Liu, Yongchang Liu, Hui Wang, Zongqing Ma |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
lcsh:TN1-997
Materials science Alloy Thermal strain 02 engineering and technology engineering.material 01 natural sciences Thermal expansion Biomaterials Damping capacity Negative thermal expansion 0103 physical sciences Composite material lcsh:Mining engineering. Metallurgy 010302 applied physics Metals and Alloys Negative thermal expansion materials 021001 nanoscience & nanotechnology Damping mechanisms Surfaces Coatings and Films Ceramics and Composites engineering Thermal strain damping model Particle Dislocation 0210 nano-technology |
| Zdroj: | Journal of Materials Research and Technology, Vol 9, Iss 5, Pp 9985-9995 (2020) |
| ISSN: | 2238-7854 |
| Popis: | Effects of Y2W3O12 particle inclusions and content on damping capacity of Al–12Si composites have been investigated. The Y2W3O12, which is a kind of negative thermal expansion material, can generate high local strain in the composites. Thermal expansion testing shows that the coefficient of thermal expansion (CTE) of Y2W3O12 has obvious changes between 100 and 200 °C The Y2W3O12/Al–12Si composites show damping peaks and display higher damping capacities than the pure Al–12Si alloy. The damping capacities of composites strongly depends on the content of Y2W3O12 inclusions. A thermal strain damping model is also established. Based on the model analysis results, there is a significant contribution of thermal strain to the damping capacity in the composites; the change in CTE of Y2W3O12 could cause the generation of damping peaks. Moreover, dislocation damping and interfacial damping are also main damping mechanisms in the investigated composites. |
| Databáze: | OpenAIRE |
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