Open AccessStudy on High-temperature Erosion Resistance of Precursor Ceramic Coatings
Author(s) -
Songjie Yang,
Jinqing Wang,
Guangxin Wang,
Shiqi Tong,
Zhimeng Wang,
Muan Zhang,
Zixiang Lin,
Feng Zhi,
Yunhao Xiong
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/474/5/052082
Subject(s) - materials science , coating , microstructure , brittleness , cubic zirconia , ceramic , substrate (aquarium) , composite material , sintering , erosion , corrosion , metallurgy , paleontology , oceanography , biology , geology
Given the high-temperature chlorine corrosion in the process of waste incinerators, polysilazane was used as the precursor, and glass powder and zirconia were added as fillers to prepare composite ceramic coating on TP347 substrate. In this paper, the effect of temperature on the formation of voids in the coating was studied by microscopic analysis. The high-temperature erosion wear resistance of the coating was also tested. The results show that the coating sintered at 500°C and 700°C has the best microstructure. To make the coating have higher hardness, the sintering temperature should be increased as much as possible at the allowable temperature of the substrate. The high-temperature erosion test shows that the erosion resistance of the coating is slightly lower than that of the substrate at room temperature and 400°C, but with the increase of temperature, the high-temperature erosion wear resistance is gradually enhanced, even exceeding the substrate, which is because the substrate is subjected to severe oxidation at high-temperatures, and its mechanical strength decreases with increasing temperature, while the coating is brittle at low temperatures, the erosion mechanism gradually becomes plastic as the temperature increases. The development of the shape erosion results in a much lower erosion wear at high-temperatures than the substrate.