Mechanical properties and electrical conductivity of oriented-SiC-whisker-reinforced Al2O3/Cu composites
Oriented SiC whisker-reinforced Al2O3/Cu composites were fabricated by powder metallurgy and hot extrusion. The microstructure of the composites was characterized by scanning electron microscopy. The mechanical properties and electrical conductivity of the composites were measured. The results indic...
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Elsevier
2022-09-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S223878542201170X |
| _version_ | 1828383048149762048 |
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| author | Jiang Feng Kexing Song Shuhua Liang Xiuhua Guo Shaolin Li |
| author_facet | Jiang Feng Kexing Song Shuhua Liang Xiuhua Guo Shaolin Li |
| author_sort | Jiang Feng |
| collection | DOAJ |
| description | Oriented SiC whisker-reinforced Al2O3/Cu composites were fabricated by powder metallurgy and hot extrusion. The microstructure of the composites was characterized by scanning electron microscopy. The mechanical properties and electrical conductivity of the composites were measured. The results indicated that the SiC whiskers aligned along the extrusion direction, and the nano Al2O3 particles were uniformly dispersed in the Cu matrix with ideal interfacial bonding. Particle and whisker hybrid reinforcement significantly enhanced the mechanical properties. The yield strength and elongation of (1 vol.%SiCw + Al2O3)/Cu composites were 6% and 15.6% higher than those of the Al2O3/Cu composites, respectively. The experimental yield strength was consistent with the theoretical value associated with different strengthening mechanisms. The main strengthening mechanisms were fine grain strengthening, Orowan strengthening and load transfer strengthening. The electrical conductivity of all the composites was higher than 82.8% IACS; however, the SiC whiskers led to electrical conductivity anisotropy. In general, the electrical conductivity of composites is related to the volume fraction and type of reinforcement. Therefore, the influence of the hybrid composition on the electrical conductivity was studied, and an analytical model for the electrical conductivity of hybrid-reinforced copper matrix composites was established, including the characteristic parameters of the particles and whiskers. The model and presented findings can provide a design basis for hybrid-reinforced composites. |
| first_indexed | 2024-12-10T04:43:06Z |
| format | Article |
| id | doaj.art-625eda8ef73746f597312c987136457e |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-12-10T04:43:06Z |
| publishDate | 2022-09-01 |
| publisher | Elsevier |
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| series | Journal of Materials Research and Technology |
| spelling | doaj.art-625eda8ef73746f597312c987136457e2022-12-22T02:01:50ZengElsevierJournal of Materials Research and Technology2238-78542022-09-012014701480Mechanical properties and electrical conductivity of oriented-SiC-whisker-reinforced Al2O3/Cu compositesJiang Feng0Kexing Song1Shuhua Liang2Xiuhua Guo3Shaolin Li4School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471003, China; Henan Province Key Laboratory of Nonferrous Metal Material Science and Processing Technology, Luoyang, 471023, ChinaSchool of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471003, China; Henan Province Key Laboratory of Nonferrous Metal Material Science and Processing Technology, Luoyang, 471023, China; Corresponding author.School of Materials Science and Engineering, Xi'an University of Technology, Xi'an, 710048, ChinaSchool of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471003, China; Henan Province Key Laboratory of Nonferrous Metal Material Science and Processing Technology, Luoyang, 471023, ChinaSchool of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471003, ChinaOriented SiC whisker-reinforced Al2O3/Cu composites were fabricated by powder metallurgy and hot extrusion. The microstructure of the composites was characterized by scanning electron microscopy. The mechanical properties and electrical conductivity of the composites were measured. The results indicated that the SiC whiskers aligned along the extrusion direction, and the nano Al2O3 particles were uniformly dispersed in the Cu matrix with ideal interfacial bonding. Particle and whisker hybrid reinforcement significantly enhanced the mechanical properties. The yield strength and elongation of (1 vol.%SiCw + Al2O3)/Cu composites were 6% and 15.6% higher than those of the Al2O3/Cu composites, respectively. The experimental yield strength was consistent with the theoretical value associated with different strengthening mechanisms. The main strengthening mechanisms were fine grain strengthening, Orowan strengthening and load transfer strengthening. The electrical conductivity of all the composites was higher than 82.8% IACS; however, the SiC whiskers led to electrical conductivity anisotropy. In general, the electrical conductivity of composites is related to the volume fraction and type of reinforcement. Therefore, the influence of the hybrid composition on the electrical conductivity was studied, and an analytical model for the electrical conductivity of hybrid-reinforced copper matrix composites was established, including the characteristic parameters of the particles and whiskers. The model and presented findings can provide a design basis for hybrid-reinforced composites.http://www.sciencedirect.com/science/article/pii/S223878542201170XAl2O3 particleSiC whiskerCopper matrix compositesElectrical conductivityMechanical properties |
| spellingShingle | Jiang Feng Kexing Song Shuhua Liang Xiuhua Guo Shaolin Li Mechanical properties and electrical conductivity of oriented-SiC-whisker-reinforced Al2O3/Cu composites Journal of Materials Research and Technology Al2O3 particle SiC whisker Copper matrix composites Electrical conductivity Mechanical properties |
| title | Mechanical properties and electrical conductivity of oriented-SiC-whisker-reinforced Al2O3/Cu composites |
| title_full | Mechanical properties and electrical conductivity of oriented-SiC-whisker-reinforced Al2O3/Cu composites |
| title_fullStr | Mechanical properties and electrical conductivity of oriented-SiC-whisker-reinforced Al2O3/Cu composites |
| title_full_unstemmed | Mechanical properties and electrical conductivity of oriented-SiC-whisker-reinforced Al2O3/Cu composites |
| title_short | Mechanical properties and electrical conductivity of oriented-SiC-whisker-reinforced Al2O3/Cu composites |
| title_sort | mechanical properties and electrical conductivity of oriented sic whisker reinforced al2o3 cu composites |
| topic | Al2O3 particle SiC whisker Copper matrix composites Electrical conductivity Mechanical properties |
| url | http://www.sciencedirect.com/science/article/pii/S223878542201170X |
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