High temperature mechanical and corrosion resistance of Fe-containing MgO-C refractory in oxidizing atmosphere

Refractory Ceramics of Clay and Alumina Waste

“…Between 25 and 1000ºC, the TEC values lie within the range of 6.2 to 6.9 x 10 -6°C-1 , which may be ascribed to the presence of crystalline phases (Table 2), mainly mullite and corundum, which present TEC of ~ 5 to 6 x 10 -6°C-1 and ~ 7 to 8 x 10 -6°C-1 , respectively [44][45][46][47] . These values are close to those reported by Chen et al 48 , who analyzed the TEC of corundum-mullite composites and found that samples with higher levels of alumina (Al 2 O 3 ) showed higher values of TEC 200-1100 of ~ 6 to 7 x 10 -6 K -1 . Since the specimens obtained in this work contain the same phases, their influence on the thermal properties are probably the same.…”

Improved oxidation resistance while maintaining slag corrosion resistance of MgO–SiC–C refractories with moderate amounts of liquid phase

“…When facing the slag, SiC would react with slag as reaction ( 1)-( 4). 36 Iron and FeSi alloy had poor wettabil-ity and infiltrability, 37 and they would remain at the outer of corroded area. The voids caused by the damage of MgO aggregates were filled by iron and FeSi alloy; thus, the main composition of layer 1 (corroded layer) was Fe-containing phase.…”

Oxidation behaviors of low carbon MgO‐C refractories: Roles of Ti2AlC and Ti2AlN

“…The cross-section of the tested samples after oxidation at 1100 • C and 1500 • C were compared (Figure 5), and the nonoxidized areas were measured and counted, as listed in Table 5. The oxidation resistance capacity was determined by plotting the nonoxidized area normalized for each cross-sectional area and was evaluated using Equation (6). After being exposed to temperatures of 1100 and 1500 • C, the cross-section of the tested samples exhibited both oxidized and nonoxidized areas, and distinct boundaries were particularly observed in the 1500 • C oxidation samples.…”

“…Meanwhile, the so-called antioxidants are also added the matrix to suppress the carbon oxidation at high temperatures. In general, antioxidants, including metal powders or their mixtures (Si, Al, Mg, Fe, Al-Si), [4][5][6][7][8] carbides (SiC, B 4 C, Cr 7 C 3 , Cr 3 C 2 , Al 4 O 4 C, Al 8 B 4 C 7 , Ti 3 AlC 2 ), [9][10][11][12][13][14][15] nitrides (Si 3 N 4 , AlN, BN, ZrN, Si 2 BC 3 N), 3,[16][17][18] and borides (ZrB 2 , CaB 6 ), 11 are usually selected considering the achieved balance between cost and efficiency. In the late 20th century, Yamaguchi [19][20][21][22] and other researchers [23][24][25] systematically investigated the oxidation mechanism of oxides-carbon refractories with various antioxidants.…”