Mirostructure and microhardness of aluminum-copper composite reinforced with multi-walled carbon nanotubes prepared by vacuum sintering and hot isostatic pressing techniques
| Autor: | Trinh Van Pham, Luan Van Nguyen, Phuong Doan Dinh, Minh Phan Ngoc |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: | |
| Zdroj: | Science of Sintering, Vol 50, Iss 2, Pp 163-171 (2018) |
| Druh dokumentu: | article |
| ISSN: | 0350-820X 1820-7413 |
| DOI: | 10.2298/SOS1802163T |
| Popis: | In this study, we report the processing, microstructure, and microhardness of aluminum-copper composites reinforced with multi-walled carbon nanotubes (CNTs). Composite powders were prepared by a high energy ball (HEB) milling process then consolidated by vacuum sintering and hot isostatic pressing (HIP) techniques. The specimens show a uniform dispersion of CNTs in the Al-Cu matrix with CNT content up to 1 wt.% and a cluster formation observed with higher CNT content of 1.5 wt.%. The specimens have a relative density of 92 % to 95 % for composites sintered by vacuum sintering and 93 % to 96 % for composites sintered by HIP. Microhardness of specimens increases with increasing CNT content up to 1_wt% and then decreases due to the formation of CNT clusters. Microhardness is enhanced both by the dispersion strengthening effect of CNTs and by precipitation hardening of Al-Cu matrix. |
| Databáze: | Directory of Open Access Journals |
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