Processing and physical properties of Al2O3/aluminum alloy composites |
| |
Authors: | Shang-Nan Chou Horng-Hwa Lu Ding-Fwu Lii Jow-Lay Huang |
| |
Affiliation: | 1. Department of Material Science and Engineering, National Cheng-Kung University, Tainan, 701, Taiwan, ROC;2. Department of Mechanical Engineering, National Chin-Yi University of Technology, Taiping, Taichung, 411, Taiwan, ROC;3. Department of Electrical Engineering, Cheng Shiu Institute of Technology, Kaohsiung County, 833, Taiwan, ROC |
| |
Abstract: | Porous aluminum oxide (Al2O3) preforms were formed by sintering in air at 1200 °C for 2 h. A356, 6061, and 1050 aluminum alloys were infiltrated into the preforms by squeeze casting in order to fabricate Al2O3/A356, Al2O3/6061, and Al2O3/1050 composites, respectively, with different volumes of aluminum alloy content. The content of aluminum alloy in the composites was 10–40% by volume. The resistivity of Al2O3/A356, Al2O3/6061, and Al2O3/1050 composites decreased dramatically from 6.41 × 1012 to 9.77 × 10−4, 7.28 × 10−4, and 6.24 × 10−4 Ω m, respectively, the four-points bending strength increased from 397 to 443, 435.1, 407.2 MPa, respectively, and the deviations were smaller than 2%. From SEM microstructural analysis and TEM bright field images, the pore volume fraction and the relative density of the composites were the most important factors that affected the physical and mechanical properties. The ceramic phase and alloy phase in Al2O3/aluminum alloy composites were found to be homogenized and uniformly distributed using electrical and mechanical properties analysis, microstructure analysis, and image analysis. |
| |
Keywords: | Al2O3/aluminum alloy composite Resistivity Four-points bending strength Image analysis |
本文献已被 ScienceDirect 等数据库收录! |
|