(1.北京科技大學 北京市腐蝕、磨蝕與表面技術(shù)重點實驗室，
北京 100083;
2. Department of Chemical and Material Engineering，
The University of Auckland，New Zealand)
摘 要: 提出了一種以脈沖電源兩極作為沉積電極，以被處理試樣作為感應(yīng)電極，發(fā)生串聯(lián)脈沖放電沉積金屬涂層的新技術(shù)。通過“針—板—針”電極放電實驗證實了上述串聯(lián)脈沖放電過程。采用改進的雙極串聯(lián)電脈沖沉積設(shè)備在1Cr18Ni8不銹鋼基體上沉積了1Cr18Ni8微晶涂層和彌散Y2O3微小顆粒的1Cr18Ni8微晶涂層。在950℃空氣中進行的高溫氧化實驗結(jié)果表明，獲得的1Cr18Ni8微晶涂層極大地提高了抗高溫氧化性能，同時還證實在微晶涂層中施加微小彌散Y2O3顆粒有助于進一步降低涂層的氧化速率及提高氧化膜的抗剝落性能。
關(guān)鍵字: 雙極串聯(lián)脈沖放電；微晶涂層；高溫氧化
micro-crystallized coatings
deposited by series double-pole
electro-pulse discharge
LI Zheng-wei2，GAO Wei2
（1.Beijing Key Laboratory for Corrosion，
Erosion and Surface Technology，University of Science and
Technology Beijing，Beijing 100083，China;
2.Department of Chemical and Material Engineering，
The University of Auckland，New Zealand）
Abstract:A new series double-pole electro-pulse discharge technique for the coating deposition was proposed，in which both positive and negative poles of the pulse-power were used as depositing electrodes and the treated alloy as an induced elect rode. The electro-pulse discharge process was verified by a set of pin-plane-pin electrode device. 1Cr18Ni8 micro-crystalline coatings and 1Cr18Ni8 micro-crystalline coatings dispersed with nano-Y2O3 particles were prepared on the surface of 1Cr18Ni8 by a modified double-poles de position device. The experimental results show that the oxidation resistance of 1Cr18Ni8 micro-crystalline coatings in air at 950℃ is improved greatly. It w as found that the addition of dispersed Y2O3 particles into the micro-crystalline coatings can reduce the scaling rate and enhance the oxide spallation resistance still further.
Key words: series double-pole electro-pulse discharge; micro-crystalline coatings; high-temperature oxidation
