Tham khảo tài liệu 'corrosion of ceramic and composite materials part 7', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 166 Chapter 5 TABLE Interfacial Reaction Products Caused by Molten Liquid Attack Oxide Liquid3 Interface3 Ref. A12O3 CAS CA2 and CA6 ai2o3 Coal Slag Mixed spinel ai2o3 CMAS MgAl2O4 ai2o3 s A3S2 Al2O3-Cr2O3 CMAS Mixed spinel AI2O3 Cr2Ơ3 Coal Slag Mixed spinel AZS Coal Slag CA6 and C2AS azs NCS NAS2 and z AZS KPS KAS2 and z CaO CAS C2S and c s CaO CFS C2S and C3S Cr2O3 spinel Coal Slag Mixed spinel Fused SiO2 CAS Cristobalite MgO CAS C2MS2 and M MgO CFS MF solution MgAl2O4 CAS C AS or CAS2 Al6Si2O 3 NCS NAS2 and A Y3A15OI2 CAS C2AS ZrSiO4 KPS KZS3 and z a A A12O3 c CaO F FeO K K2O M MgO N Na2O p PbO s SiC 2 z ZrOo. important role in the formation of a crystalline interface phase. An excellent study of the effects of forced convection is that by Sandhage and Yurek who in their studies of the indirect dissolution of chrome-alumina crystalline solution materials in CaO-MgO-Al2O3-SiO2 melts at 1550 C reported that the reaction layer thickness of the spinel that formed decreased with increasing rotational rpm but did not change with time at constant rpm. The reaction layer was an order-of-magnitude thinner 30 vs. 300 pm at 1200 rpm when compared to the case with no forced convection. The investigator must be careful in his interpretation of the crystalline phases present after an experiment has been Copyright 2004 by Marcel Dekker Inc. Corrosion of Specific Crystalline Materials 167 completed so that he does not confuse phases that precipitate during cooling with those that were present during the experiment. The reader if interested in a particular system should examine the original articles of those listed in Table to determine the exact experimental conditions. The following sections describe some of the more important systems that have been investigated but no attempt has been made for an exhaustive survey. Alumina-Containing Materials The corrosion of multicomponent .
