STRENGTHENING MECHANISM OF GRAPHENE OXIDE NANOSHEETS FOR Al2O3-C REFRACTORIES

被引：0
|
作者：
Wang, Qinghu [1 ]
Li, Yawei [1 ]
Luo, Ming [1 ]
Sang, Shaobai [1 ]
Zhu, Tianbin [1 ]
Zhao, Lei [1 ]
机构：
[1] Wuhan Univ Sci & Technol, Wuhan, Peoples R China
来源：
Proceedings of the Unified International Technical Conference on Refractories (UNITECR 2013) | 2014年
关键词：
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Al2O3-C refractories containing graphene oxide nanosheets (GONs) with Al, Si and SiO2 additives were prepared in this work. The GONs/alpha-Al2O3 composite mixtures were firstly prepared by ball milling expanded graphite (EG) and alpha-Al2O3, then incorporated into Al2O3-C refractories. The results revealed that GONs with different size and thickness depended on addition amount of expanded graphite. The GONs produced positive influence on in-situ formed ceramic whiskers in specimens at lower temperature owing to its higher reactivity than that of graphite flake. The mechanical properties such as cold modulus of rupture (CMOR) and flexural modulus (E) of specimens with GONs were improved compared with those without GONs. This improvement was attributed to strengthening of GONs at 800 degrees C and synergetic strengthening effects with graphite flake and in-situ formed whiskers at 1000-1400 degrees C.
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页码：679 / 684
页数：6
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