Microstructure and Mechanical Properties of MgO-C Refractories Containing Graphite Oxide Nanosheets (GONs)
MgO-C refractories containing graphite oxide nanosheets (GONs) with Al,Si additives were prepared in this work.Firstly the MgO-GONs composite powders were fabricated by common ball milling of expanded graphite and magnesia powders,and then incorporated into MgO-C refractories.The results showed GONs in different size and thickness were well distributed in magnesia powderdepending on addition amount of expanded graphite; the addition of GONs produced the positive influence on the mechanical properties of MgO-C refiactories.Much higher cold modulus of rupture (CMOR) and increased displacement were achieved for MgO-C specimens with GONs compared to that of the specimen with only flaky graphite fired at 1400℃.Moreover,the thermal shock resistance of all the samples with addition of GONs was better than that of no GONs one,which is supposed that GONs and in-situ formed ceramic phases in matrix can strengthen and toughen MgO-C refractories.
ZHU Tianbin LI Yawei LUO Ming SANG Shaobai WANG Qinghu ZHAO Lei
The Key State Laboratory Breeding Base of Refractories and Ceramics,Wuhan University of Science and Technology, Wuhan 430081, China
国际会议
The 6th International Symposium on Refractories (第六届国际耐火材料会议)
郑州
英文
223-226
2012-10-18（万方平台首次上网日期，不代表论文的发表时间）