Effect of Metallic Zn Powder on Oxidation Resistance of Al_2O_3-C Refractories

作     者：LI Youqi KE Changming LI Yousheng LI Nan 

作者机构：The Hubei Province Key Laboratory of Ceramic and RefractoriesWuhan University of Science and Technology Wuhan 430081 China 

出 版 物：《China's Refractories》 (中国耐火材料（英文版）)

年 卷 期：2006年第15卷第4期

页      面：29-33页

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

主　　题：Corrosion mechanism MgO-CaO Refractory Antioxidant Oxidation resistance 

摘      要：Al2O3-C specimens were prepared by using tabular corundum, flaky graphite, Al, Si, and Zn powder as starting materials and phenolic formaldehyde resin as binder. Keeping the mass ratios of tabular corundum, flaky graphite, Al and Si constant, different contents of Zn （0,0. 5%, 1%, 2% and 3% ） were added respectively. The specimens were/teat treated at 120 -220℃ for 24h, and then fired at 1400℃ for 3h in air atmosphere. The mass change rate, thickness of decarburization layer, apparent porosity, bulk density and microstructure of the products were determined and observed by means of SEM and EDX. The results show that the specimen with 2% Zn was characterized by minimum in thickness of decarburization layer and in apparent porosity and maximum in bulk density. Consequently, the specimen with 2% metal Zn is supposed to perform the best oxidation resistance.