Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1491928 | Materials Research Bulletin | 2008 | 8 Pages |
Abstract
Fine-grained alumina was obtained in 2 min by a new densification method based on Self-propagating High-temperature Synthesis plus Quick Pressing (SHS/QP). The sample was densified to more than 99% of theoretical density under a large mechanical pressure (100 MP) and a fast heating rate (1600 °C/min). Compared with the alumina sample obtained by spark plasma sintering (SPS) at lower heating rates (100 or 500 °C/min), almost no grain growth was found in the sample obtained in this work. The microstructure and mechanical properties were studied. Hardness value of 18.6 ± 0.4 GPa and fracture resistance value of 3.4 ± 0.3 MPa m1/2 were measured for fine-grained alumina of this work. The densification mechanism was discussed.
Related Topics
Physical Sciences and Engineering
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Authors
Fancheng Meng, Zhengyi Fu, Jinyong Zhang, Hao Wang, Weimin Wang, Yucheng Wang, Richard Todd, Qingjie Zhang,