Microstructure and mechanical properties of high-pressure sintered Al 2O3/SiC nanocomposites

被引：0
|
作者：
Teng, Yuancheng [1 ]
Sun, Zhiping [2 ]
Zhang, Kuibao [1 ]
Lu, Weiyuan [3 ]
机构：
[1] Teng, Yuancheng
[2] Sun, Zhiping
[3] Zhang, Kuibao
[4] Lu, Weiyuan
来源：
Teng, Y. (tyc239@163.com) | 1600年 / Elsevier Ltd卷 / 578期
关键词：
Al2O3/SiC nanocomposites were synthesized by high-pressure sintering using α-Al2O3 and β-SiC nanopowders as the raw materials. Microstructure and mechanical properties of the sintered samples were investigated using X-ray diffraction (XRD); Scanning Electron Microscope (SEM); Atomic Force Microscope (AFM) et al. The results indicate that high-pressure sintering is an effective sintering technique; which can densify Al2O3/SiC nanocomposites at high pressure (4.5 GPa) and relatively low temperature (1000-1230 °C). Rapid grain growth of Al2O3 is mainly restrained by the separation effect of nanosized SiC grains. Grain boundary; grain boundary-intragranular and nano-nano structured Al 2O3/SiC nanocomposites can be achieved by controlling the sintering temperature and β-SiC content. The highly densified Al 2O3/SiC nanocomposite (AS5-1170) exhibits excellent mechanical properties as 429.9 GPa in elastic modulus and 30.7 GPa in nano-hardness. © 2013 Elsevier B.V. All rights reserved;
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页码：67 / 71
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