EROSION WEAR OF AlSi-GRAPHITE AND Ni/GRAPHITE ABRADABLE SEAL COATINGS
来源期刊:中国有色金属学报(英文版)1997年第2期
论文作者:Yi Maozhong Zhang Xianlong Ji Gengshun Zheng Jihong He Jiawen
文章页码:100 - 103
Key words:abradable seal coating; erosion wear; microstructure
Abstract: Erosion wear of AlSi graphite, Ni/graphite medium temperature abradable seal coatings for turbine engine was investigated. The results showed that at 90° impact angle, the erosion resistance, 1/E v ,increases linearly with the increase of volume fraction of metal phase in the coatings, f M .At high angle impact, abrasive particles impinge on the coating surface and produce indents and extruded lips, then the lips fall off; and the flattened metal grains exfoliate. At low angle, micro cutting, plowing and tunneling via pores and non metal phase are predominate.