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Y2O3/CeO2改性的低溫滲鋁涂層制備和循環(huán)氧化性能研究
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黑龍江科技大學(xué),黑龍江科技大學(xué)

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Scientific Research Fund of Heilongjiang Provincial Education Department (11531319)


Fabrication and cyclic oxidation of Y2O3/CeO2-modified low temperature aluminide coatings
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Heilongjiang University of Science and Technology,Heilongjiang University of Science and Technology

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    摘要:

    本文利用Y2O3/CeO2納米顆粒替代部分Al2O3粉作為填充劑，在Ni基體上, 600℃低溫滲鋁10h，制備了Y2O3/CeO2改性的低溫滲鋁涂層。作為對(duì)比，采用相同的工藝在Ni基體上利用純Al2O3粉制備了普通滲鋁涂層。對(duì)比研究了Y2O3/CeO2是如何影響氧化鋁的相變以及滲鋁涂層的1000℃時(shí)的循環(huán)氧化性能。結(jié)果發(fā)現(xiàn)，Y2O3和CeO2對(duì)q-a相變具有不同的作用：Y2O3抑制?-Al2O3的長大，而CeO2促進(jìn)?-?相變。與普通滲鋁涂層相比，Y2O3/CeO2改性的滲鋁涂層形成粘附性更好的氧化鋁膜，提高了滲鋁涂層的循環(huán)氧化性能。文中對(duì)Y2O3/CeO2是如何影響?-?相變以及滲鋁涂層的循環(huán)氧化性能進(jìn)行了分析。

    Abstract:

    By using Y2O3/CeO2 powder, instead of part of Al2O3, acting as filler, Y2O3/CeO2-modified aluminide coatings were produced on Ni based using a conventional pack-cementation method at 600℃ for 10 h. For comparison, normal aluminide coating was also produced using pure Al2O3 acting as filler. Effect of Y2O3/CeO2 in the pack on the alumina phase transformation and cyclic oxidation resistance in air at 1000℃ was investigated. The results indicated that Y2O3 and CeO2 have a different effect for ?-? phase transformation: Y2O3 suppresses the growth of the ?-alumina but CeO2 promotes the q-a phase transformation. However, compared to the normal aluminide coatings, the addition of Y2O3/CeO2 significantly improved the cyclic oxidation resistance due to the formation of adherent alumina scale, especially the later. The effects of Y2O3 /CeO2 on alumina phase transformation and cyclic oxidation resistance are discussed in detail.

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張海軍,孫儉峰. Y2O3/CeO2改性的低溫滲鋁涂層制備和循環(huán)氧化性能研究[J].稀有金屬材料與工程,2017,46(2):301~306.[zhanghaijun, Sun Jian-feng. Fabrication and cyclic oxidation of Y2O3/CeO2-modified low temperature aluminide coatings[J]. Rare Metal Materials and Engineering,2017,46(2):301~306.]
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  • 收稿日期:2014-11-05
  • 最后修改日期:2014-12-31
  • 錄用日期:2015-01-13
  • 在線發(fā)布日期: 2017-04-10
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