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高溫空氣氧化作用下低鋁含量FeCrAl涂層的組織演變
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1.成都理工大學(xué) 核技術(shù)與自動(dòng)化工程學(xué)院，四川 成都 610059;2.成都理工大學(xué) 材料與化學(xué)化工學(xué)院，四川 成都 610059;3.成都工業(yè)學(xué)院 智能制造學(xué)院，四川 成都 611730;4.成都工業(yè)學(xué)院 自動(dòng)化工程學(xué)院，四川 成都 611730

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國(guó)家自然科學(xué)基金項(xiàng)目（面上項(xiàng)目，重點(diǎn)項(xiàng)目，重大項(xiàng)目）,


Microstructure Evolution of FeCrAl Coating with Low Al Content Under High-Temperature Air Oxidation
Author:
Affiliation:

1.College of Nuclear Technology and Automation Engineering, Chengdu University of Technology, Chengdu 610059, China;2.College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, China;3.School of Intelligent Manufacturing, Chengdu Technological University, Chengdu 611730, China;4.School of Automation and Electrical Engineering, Chengdu Technological University, Chengdu 611730, China

Fund Project:

Key Science and Technology Project of Zigong City (2019GYCX19); Foundation of Collaborative Innovation Centre for Nuclear Power Technology of National Defense Science and Technology Industry (HDLCXZX-2018-HD-026-02); National Natural Science Foundation of China Youth Fund (51201111); Scientific Research Foundation of Chengdu University of Technology (10900-KYQD-06905)

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    摘要:

    通過(guò)磁控濺射技術(shù)在Zr-4合金基體上沉積了厚度約為18 μm的FeCrAl涂層，以提高Zr合金的高溫抗氧化性能。通過(guò)空氣氧化實(shí)驗(yàn)研究了低Al含量的FeCrAl涂層抗氧化性能。為了評(píng)估涂層界面演變和元素遷移之間的關(guān)系，采用了場(chǎng)發(fā)射掃描電子顯微鏡、能譜儀和掠入射X射線衍射儀進(jìn)行了深入分析。結(jié)果表明，盡管FeCrAl涂層在1000 ℃空氣氧化后會(huì)出現(xiàn)分層剝落，但該涂層仍然有效地保護(hù)了Zr-4合金基體不被氧化。FeCrAl涂層性能下降的主要原因是高溫下Al元素嚴(yán)重向外擴(kuò)散以及Fe、Cr元素向內(nèi)擴(kuò)散，最終導(dǎo)致涂層內(nèi)部分層和剝落。此外，還討論了FeCrAl涂層在800、900和1000 ℃時(shí)的空氣氧化行為。

    Abstract:

    FeCrAl coating with thickness of 18 μm was deposited on Zr-4 alloy substrate by magnetron sputtering in order to improve the high-temperature oxidation resistance of Zr alloys. The oxidation resistance of FeCrAl coating with low Al content was investigated by air oxidation tests. Field emission scanning electron microscope, energy dispersive spectrometer, and grazing incidence X-ray diffraction were used to evaluate the relationship between interfacial evolution and element migration. Results show that although the FeCrAl coating is layered and gradually peels off after air oxidation at 1000 °C, the coating still effectively protects the Zr-4 substrate from oxidation. The performance degradation of FeCrAl coatings is mainly caused by the severe outward diffusion of Al element and the inward diffusion of Fe and Cr elements at high temperatures, which results in the layering and peeling inside the coating. The air oxidation behavior of FeCrAl coating at 800, 900, and 1000 °C was also discussed.

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賴(lài)茂林,郭蘭芳,葛良全,曾國(guó)強(qiáng),劉春海.高溫空氣氧化作用下低鋁含量FeCrAl涂層的組織演變[J].稀有金屬材料與工程,2023,52(11):3691~3696.[Lai Maolin, Guo Lanfang, Ge Liangquan, Zeng Guoqiang, Liu Chunhai. Microstructure Evolution of FeCrAl Coating with Low Al Content Under High-Temperature Air Oxidation[J]. Rare Metal Materials and Engineering,2023,52(11):3691~3696.]
DOI：10.12442/j. issn.1002-185X.20230022

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  • 收稿日期:2023-01-12
  • 最后修改日期:2023-06-05
  • 錄用日期:2023-06-26
  • 在線發(fā)布日期: 2023-11-23
  • 出版日期: 2023-11-22