Microcrystalline coatings deposited by series double-pole electro-pulse discharge and its high-temperature oxidation behavior  

作　　者：徐强 何业东 王德仁 齐慧滨 李正伟 高唯 

出　　处：《Science China(Technological Sciences)》2002年第5期477-484,共8页中国科学（技术科学英文版）

基　　金：This work was supported by the National Natural Science Foundation of China (Grant No. 59801002).

摘　　要：A new technique—series electro-pulse discharge (SEPD)—was developed as a surface coating process. In this process, both positive and negative poles of a pulse power were used as the depositing electrodes and the substrate alloy was used as an induction electrode. The physical process for such SEPD was tested by measuring the relationship between the discharge voltages and gaps in a pin-plate-pin system. Microcrystalline Ni20Cr alloy coatings and oxidedispersed Ni20Cr alloy coatings were prepared on Ni20Cr alloy surface by using a vibrating SEPD device. Oxidation at 950°C in ambient air showed that the microcrystalline Ni20Cr alloy coatings greatly improved the oxidation resistance of the substrate alloy. The addition of dispersed Y2O3 nano-particles into the microcrystalline coatings was found to further reduce the oxidation rate and enhance the oxide spallation resistance.

关 键 词：SERIES electro-pulse DISCHARGE deposition  dispersed Y2O3 MICROCRYSTALLINE coatings  high-temperature oxidation. 

分 类 号：TQ153[化学工程—电化学工业]