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Effect of Y2O3 or CeO2 Fillers on the Oxidation Behavior of Aluminide Coatings by Low-temperature Pack Cementation
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Effect of Y2O3 or CeO2 Fillers on the Oxidation Behavior of Aluminide Coatings by Low-temperature Pack Cementation
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Scientific Research Fund of Heilongjiang Provincial Education Department (11531319)

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    摘要:

    利用Y2O3或CeO2納米顆粒替代部分Al2O3粉作為填充劑，在Ni基體上, 于600 ℃低溫滲鋁10 h，制備了2種稀土氧化物改性的低溫滲鋁涂層。作為對比，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。1000 ℃下恒溫氧化結(jié)果表明：Y2O3通過抑制q-Al2O3的長大提高涂層的抗氧化性能，而CeO2則通過促進(jìn)q-Al2O3向a-Al2O3的相變明顯提高其抗氧化性能。文中對Y2O3或CeO2是如何影響滲鋁涂層的氧化性能進(jìn)行了分析。

    Abstract:

    Two aluminide coatings were produced on Ni substrate via a conventional pack-cementation at 600 oC for 10 h using Y2O3 or CeO2 particles instead of part of Al2O3 as filler. For comparison, aluminizing was also performed under the same condition using pure Al2O3 as filler. The results of isothermal-oxidation at 1000 oC indicate that Y2O3 can suppress the growth of q-alumina and improve the oxidation resistance, while CeO2 accelerates the q to a-alumina transformation and significantly improves the oxidation resistance. Besides, the effects of Y2O3 or CeO2 filler on the coating oxidation behavior were discussed.

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張海軍,孫儉峰. Effect of Y2O3 or CeO2 Fillers on the Oxidation Behavior of Aluminide Coatings by Low-temperature Pack Cementation[J].稀有金屬材料與工程,2015,44(11):2628~2632.[Zhang Haijun, Sun Jianfeng. Effect of Y2O3 or CeO2 Fillers on the Oxidation Behavior of Aluminide Coatings by Low-temperature Pack Cementation[J]. Rare Metal Materials and Engineering,2015,44(11):2628~2632.]
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  • 收稿日期:2014-11-14
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  • 在線發(fā)布日期: 2016-07-29
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