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309不锈钢表面CeO2 改性铝化物涂层的循环氧化行为
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山东交通学院 船舶与港口工程学院,山东 威海 264200

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Natural Science Foundation of Shandong Province (ZR2019MEE107), Project of Shandong Provincial Department of transportation (2020B88), Shandong Jiaotong University “Climbing” Research Innovation Team program (SDJTC1802), Ph. D. Scienti?c Research Foundation of Shandong Jiaotong University (BS2018005)


Cyclic-Oxidation Behavior of CeO2-Modified Aluminide Coating on 309 Stainless Steel
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Naval Architecture & Port Engineering College, Shandong Jiaotong University, Weihai 264200, China

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Natural Science Foundation of Shandong Province (ZR2019MEE107); Project of Shandong Provincial Department of Transportation (2020B88); Graduate Science and Technology Innovation Project of Shandong Jiaotong University (2023YK106, 2023YK109)

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    摘要:

    以NH4Cl为活化剂,采用包埋法在309不锈钢上制备了纳米CeO2改性铝化物涂层。采用X射线衍射分析仪、扫描电子显微镜和能谱仪对涂层以及循环氧化50次后的表面和横截面进行了分析。微观结构研究表明,改性涂层中包含Fe4Al13相,由于基底金属的向外扩散,改性涂层捕获了少量的CeO2纳米颗粒。与不添加CeO2纳米颗粒的普通铝化物涂层相比,在900 ℃的大气环境下,分散CeO2改性铝化物涂层表现出更好的防氧化剥落性能;在50次循环氧化后,CeO2改性铝化物涂层上仍然可以发现一些Fe2Al5相,并存在向外扩散的Al层、中间的FeAl层和外部的Fe2Al5+FeAl混合层,这表明CeO2纳米颗粒可以延缓铝化物涂层的降解。

    Abstract:

    A CeO2-modified aluminide coating was prepared on 309 stainless steel by pack cementation method with NH4Cl as activator. The surface and cross-section of the coating before and after cyclic-oxidation at 900 °C for 50 cycles were analyzed by X-ray diffractometer and scanning electron microscope coupled with energy dispersive spectroscope. The microstructure analysis results show that the modified coating consists of Fe4Al13 phase. A few CeO2 nanoparticles are entrapped due to the outward diffusion of base metal. Compared with the normal aluminide coating without the addition of CeO2 nanoparticles, the aluminide coating modified by dispersed CeO2 nanoparticles has better scale spallation resistance in air at 900 °C. Some Fe2Al5 phases can be found on CeO2-modified aluminide coating even after 50 cycles of oxidation. Additionally, the outward-diffused Al layer, the intermediate FeAl layer, and the external Fe2Al5+FeAl mixed layer exist in the coating, suggesting that CeO2 nanoparticles can retard the degradation of aluminide coatings.

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李钦东,孟君晟,陈柏森,郝晨帆,陈志辉.309不锈钢表面CeO2 改性铝化物涂层的循环氧化行为[J].稀有金属材料与工程,2023,52(11):3707~3714.[Li Qindong, Meng Junsheng, Chen Baisen, Hao Chenfan, Chen Zhihui. Cyclic-Oxidation Behavior of CeO2-Modified Aluminide Coating on 309 Stainless Steel[J]. Rare Metal Materials and Engineering,2023,52(11):3707~3714.]
DOI:10.12442/j. issn.1002-185X.20230205

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  • 收稿日期:2023-04-12
  • 最后修改日期:2023-06-26
  • 录用日期:2023-07-04
  • 在线发布日期: 2023-11-23
  • 出版日期: 2023-11-22