本文主要研究内容
作者孙晓东,朱和国（2019）在《Reaction Mechanisms and Tensile Properties of the Composites Fabricated by Al-B2O3System》一文中研究指出：The aluminum matrix composites（AlB2+a-Al2O3）/Al were fabricated by in situ reaction synthesis from an Al-B2 O3 system. The reaction pathways, apparent activation energies and tensile properties were analyzed by using differential scanning calorimetry（DSC）, X-ray diffraction（XRD）, scanning electron microscopy（SEM）, and equipped energy dispersive spectroscopy（EDS）. The results showed that there are two-step reactions in the Al-B2 O3 system. The first-step is 15 Al+7 B2 O3→7 aAl2O3+AlB12+2 B and the second-step is 2 B+AlB12+6 Al→7 AlB2. Their corresponding apparent activation energies are 352 and 444 kJ/mol, respectively. The tensile strength and elongation rate of the composites are 190.5 MPa and 6.6%, respectively.Compared with ordinary aluminum base material, the performance is superior. There are many dimple and cracked a-Al2O3 reinforcements in tensile fracture surface layer.
Abstract
The aluminum matrix composites（AlB2+a-Al2O3）/Al were fabricated by in situ reaction synthesis from an Al-B2 O3 system. The reaction pathways, apparent activation energies and tensile properties were analyzed by using differential scanning calorimetry（DSC）, X-ray diffraction（XRD）, scanning electron microscopy（SEM）, and equipped energy dispersive spectroscopy（EDS）. The results showed that there are two-step reactions in the Al-B2 O3 system. The first-step is 15 Al+7 B2 O3→7 aAl2O3+AlB12+2 B and the second-step is 2 B+AlB12+6 Al→7 AlB2. Their corresponding apparent activation energies are 352 and 444 kJ/mol, respectively. The tensile strength and elongation rate of the composites are 190.5 MPa and 6.6%, respectively.Compared with ordinary aluminum base material, the performance is superior. There are many dimple and cracked a-Al2O3 reinforcements in tensile fracture surface layer.
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论文作者分别是来自Journal of Wuhan University of Technology(Materials Science)的孙晓东,朱和国，发表于刊物Journal of Wuhan University of Technology(Materials Science)2019年05期论文，是一篇关于,Journal of Wuhan University of Technology(Materials Science)2019年05期论文的文章。本文可供学术参考使用，各位学者可以免费参考阅读下载，文章观点不代表本站观点，资料来自Journal of Wuhan University of Technology(Materials Science)2019年05期论文网站，若本站收录的文献无意侵犯了您的著作版权，请联系我们删除。
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