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CeO<sub>2</sub>改善低溫滲鋁涂層抗氧化性能的研究
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上海工程技術大學材料工程學院

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國家自然科學基金項目（面上項目，重點項目，重大項目）


Improved oxidation resistance of a CeO<sub>2</sub>-midifed aluminide coating by low-temperature pack cementation
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School of Materials Engineering,Shanghai University of Science and Engineering

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The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)

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    摘要:

    在Ni基體上電沉積純Ni鍍層和Ni-CeO2復合鍍層并對其進行620 °C低溫滲鋁，制備了無CeO2和CeO2改性的鋁化物涂層。將以上兩種涂層在1000 °C下氧化，研究CeO2顆粒的加入對氧化膜的生長速率和粘附性能的影響。結果表明，在δ-Ni2Al3涂層中加入納米CeO2顆粒可以推遲一層完整α-Al2O3膜的形成時間，降低氧化膜的生長速率。此外，納米CeO2顆粒的加入提高了氧化膜的粘附性，原因是與沒有CeO2摻雜的涂層相比，CeO2改性鋁化物涂層在氧化膜/涂層界面上形成的空洞尺寸較小。

    Abstract:

    CeO2-free and CeO2-modified aluminide coatings were prepared by aluminizing pure Ni film and Ni-CeO2 film on Ni plate at 620°C, respectively. The effect of the CeO2 addition on the growth rate and adhesion of the alumina scale was investigated at 1000 °C. The results show that the addition of nanometer CeO2 in aluminide coating of δ phase delayed the formation of a continuous α-Al2O3 scale and decreased the growth rate of alumina scale during oxidation. Moreover, the alumina scale adhesion was improved by the addition of nanometer CeO2 due to the smaller cavities formed at the alumina scale/coating interface compared with the CeO2-free one.

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譚曉曉. CeO<sub>2</sub>改善低溫滲鋁涂層抗氧化性能的研究[J].稀有金屬材料與工程,2019,48(6):1785~1790.[Xiaoxiao Tan. Improved oxidation resistance of a CeO<sub>2</sub>-midifed aluminide coating by low-temperature pack cementation[J]. Rare Metal Materials and Engineering,2019,48(6):1785~1790.]
DOI：10.12442/j. issn.1002-185X.20180938

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  • 收稿日期:2018-09-09
  • 最后修改日期:2018-09-30
  • 錄用日期:2018-10-19
  • 在線發(fā)布日期: 2019-07-30
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