串联电脉冲沉积Co-Cr弥散Y_2O_3合金化微晶涂层

Micro-Crystalline Coatings of Co-Cr Dispersed with Y_2O_3 Nanoparticles Deposited by Series Electro Pulse Discharge

提出了一种利用被沉积基体材料作为感应电极 ,脉冲电源的输出两极均作为沉积电极的串联电脉冲沉积涂层技术 ,以Co3 0Cr合金为沉积电极 ,利用串联电脉冲沉积技术成功地在 18 8不锈钢基体上沉积了Co Cr合金化微晶涂层和弥散Y2 O3细小颗粒的Co Cr合金化微晶涂层 ,并在 95 0℃静态空气中进行了涂层氧化试验。通过氧化动力学和SEM ,XRD等分析表明 ,串联电脉冲沉积的合金化微晶涂层具有良好的抗高温氧化性能 。

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 with the substrate alloy as an induction electrode. Micro crystalline Co Cr coatings and oxide dispersed Co Cr stainless steel coatings were deposited on stainless steel (Fe 18Cr 8Ni) surface by using Co30Cr alloy as depositing electrodes. Oxidation at 950 ℃ in ambient air shows that the coatings greatly improved the oxidation resistance of the steel. The addition of dispersed Y 2O 3 nano particles into the alloy coatings was found to further reduce the scaling rate and enhance the oxide spallation resistance.