Effect of Heat Treatment Temperature on Properties of SiO2-ZrO2-Al2O3-Cr2O3 Coatings on Stainless Steel Substrate
The SiO2-ZrO2-Al2O3-Cr2O3 film is coated on the surface of stainless steel using analytical reagent TEOS, ZrOCl2•8H2O, Al(NO3)3•9H2O and Cr(NO3)3•9H2O as precursor and basing on mole ratio to calculate through Sol-gel method. The phase transformation behavior, erosion resistance, thermal shock resistance and abrasion resistance of ceramic coating by different heat treatment are studied. The results show that: 1) The SiO2-ZrO2-Al2O3-Cr2O3 gel coatings has non-crystalline structure after the treatment at 700°C and 800°C. New substance is not created below 700°C. 2) The stainless steel substrate with ceramic coating has a higher erosion resistance at high temperature (700°C and 800°C)than that without coating.3) Thermal shock resistance of the samples treated in 700°C is the best which has reached within 17-21cycles (900°C, air cooling). 4) The stainless steel substrate with ceramic coating has a higher abrasion resistance than that without coating. The samples treated at 700°C and 800°C have the best abrasion resistance.
Yiwang Bao, Li Tian and Jianghong Gong
S. X. Liu et al., "Effect of Heat Treatment Temperature on Properties of SiO2-ZrO2-Al2O3-Cr2O3 Coatings on Stainless Steel Substrate", Advanced Materials Research, Vol. 177, pp. 321-324, 2011