A Comparative Study of Thermal Conductivity and Tribological Behavior of Squeeze Cast A359/AlN and A359/SiC Composites
| Autor: | M.T. Abou El-khair, Alexander Yu. Churyumov, A. Daoud, Essam A.M. Shalaby, Dina H.A. Besisa |
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| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Materials science Mechanical Engineering Alloy Metal matrix composite chemistry.chemical_element 02 engineering and technology engineering.material Tribology Nitride 021001 nanoscience & nanotechnology 01 natural sciences Wear resistance Thermal conductivity chemistry Mechanics of Materials Aluminium 0103 physical sciences Thermal engineering General Materials Science Composite material 0210 nano-technology |
| Zdroj: | Journal of Materials Engineering and Performance. 26:3079-3089 |
| ISSN: | 1544-1024 1059-9495 |
| Popis: | A comparative study of thermal and wear behavior of squeeze cast A359 alloy and composites containing 5, 10 and 15 wt.% AlN and SiC particulates was investigated. It was pointed out that A359/AlN composites have a superior thermal conductivity as compared to A359 alloy or even to A359/SiC composites. Composites wear characteristics were achieved by pins-on-disk instrument over a load range of 20-60 N and a sliding speed of 2.75 m/s. Results showed that A359/AlN and A359/SiC composites exhibited higher wear resistance values compared to A359 alloy. Moreover, A359/AlN composites showed superior values of wear resistance than A359/SiC composites at relatively high loads. Friction coefficients and contact surface temperature for A359/AlN specimens decreased as AlN content increased, while they increased for A359/SiC. Investigations of worn surfaces revealed that A359/AlN composites were covered up by aluminum nitrides and iron oxides, which acted as smooth layers. However, A359/SiC composites were mainly covered only by iron oxides. The superior thermal conductivity and the significant wear resistance of the developed A359/AlN composites provided a high durable material suitable for industrial applications. |
| Databáze: | OpenAIRE |
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