The Effect of Zirconium Disilicide (ZrSi_2) Additions on the Carbon Oxidation Behavior of Alumina/Graphite Refractory Materials
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概要
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Carbon oxidation is a main industrial problem for Alumina/Graphite Submerged Entry Nozzles (SEN) during pre-heating. Thus, the effect of ZrSi2 antioxidants and the coexistence of antioxidant additive and (4B2O3·BaO) glass powder on carbon oxidation were investigated at simulated non-isothermal heating conditions in a controlled atmosphere. Also, the effect of ZrSi2 antioxidants on carbon oxidation was investigated at isothermal temperatures at 1473 K and 1773 K. The specimens weight loss and temperature were plotted versus time and compared to each others. The thickness of the oxide areas were measured and examined using XRD, FEG-SEM and EDS. The coexistence of 8 wt% ZrSi2 and 15 wt% (4B2O3·BaO) glass powder of the total alumina/graphite base refractory materials, presented the most effective resistance to carbon oxidation. The 121% volume expansion due to the Zircon formation during heating and filling up the open pores by (4B2O3·BaO) glaze during green body sintering led to an excellent carbon oxidation resistance.
- 2010-11-15
著者
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Jonsson Par
Division Of Applied Process Metallurgy Department Of Materials Science And Engineering Royal Institu
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Brabie Voicu
Dalarna University
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Jonsson Par
Division Of Applied Process Metallurgy Royal Institute Of Technology
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MEMARPOUR Arashk
Dalarna University
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Brabie Voicu
Dalarna Univ.
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