| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 7974621 | Materials Science and Engineering: A | 2018 | 9 Pages |
Abstract
An aluminium matrix composite reinforced by in situ-generated gamma-Al2O3 whiskers was fabricated from a simple Al-H3BO3 system through cold pressing and sintering. The gamma-Al2O3 whiskers with an average diameter of 20 nm and an aspect ratio of 10-15 were synthesized during the sintering process and homogeneously distributed in the Al matrix. As a result of the perfect lattice matching between gamma-Al2O3 and the Al matrix, the gamma-Al2O3 whisker is a desired reinforcement for the Al matrix, improving the ultimate tensile strength and hardness to 217 MPa and 43.5 HV, respectively, with a satisfactory ductility of 11%. Differential scanning calorimetry analysis shows that the growth of the whisker occurred at 550-650 °C, and the ball milling energy has a significant effect on whisker growth.
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Authors
Xiaoyao Qu, Fucheng Wang, Chunsheng Shi, Naiqin Zhao, Enzuo Liu, Chunnian He, Fang He,