摘要
研究以MgB2为添加剂对铝碳质耐火材料抗氧化性能的影响,并探讨其抗氧化机理。结果表明:MgB2先与CO气体反应生成MgO、B2O3和C,生成的MgO与Al2O3反应生成MgAl2O4,B2O3与Al2O3反应生成Al18B4O33,其对铝碳质耐火材料的抗氧化起到至关重要的作用,原因在于MgAl2O4有一定的体积膨胀,使材料更加致密,限制氧气的侵入;Al18B4O33覆盖在基质表面,阻止材料的氧化。
The effect of MgB_2 on the oxidation resistance of A1_2O_3-C refractories and the reaction mechanism were investigated. The result shows that MgB2 is found to react with CO gas, and form MgO, B2O_3 and C. Then MgO reacts with AhO_3 and results in MgAhO4. And B：O3 reacts with Al_2O_3 and results in Al_18B_4O_33. MgA1_2O_4 and Al_18B_4O_33 play an important role in the suppression of carbon oxidation, this is because MgAl_2O_4 makes the A1203-C refractories denser and Al_18B_4O_33 forms a dense layer on the surface, which inhibit oxidation of refractory.
出处
《兵器材料科学与工程》
CAS
CSCD
北大核心
2012年第2期64-66,共3页
Ordnance Material Science and Engineering
基金
陕西省国际合作项目(No.2010KW-24(2))
人力资源和社会保障部留学人员科技活动择优资助项目
教育部留学回国人员科技启动基金(教外司留[2011]1139)
