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首页> 外文期刊>Corrosion science >The formation mechanisms of HfO_2 located in different positions of oxide scales on ni-al alloys
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The formation mechanisms of HfO_2 located in different positions of oxide scales on ni-al alloys

机译:位于Ni-Al合金上的不同位置的HFO_2的形成机制

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摘要

HfO2 tends to grow on Hf-containing alloys during high-temperature oxidation and significantly affects the oxidation resistance. In this paper, cyclic oxidation behavior of single beta-phase Ni-49.9Al, gamma'-phase Ni-25Al and binary phase (gamma'+beta) Ni-33Al alloys doped with Hf was investigated at 1100 degrees C. HfO2 was located at different positions of the oxide scale grown on the above alloys. The HfO2 was distributed linearly within Al2O3 scale in Ni-49.9Al-0.1Hf whilst HfO2 primarily appeared along the spinel/Al2O3 interface in Ni-25Al-0.1Hf and Ni-33Al-0.1Hf. In addition, the specific distribution of HfO2 in Ni-33Al-0.1Hf was analyzed by HAADF-STEM and the corresponding formation mechanisms were proposed.
机译:在高温氧化过程中,HFO 2倾向于在含HF的合金上生长,并且显着影响抗氧化性。本文在1100℃下,研究了掺杂掺杂HF的单β相Ni-49.9aal,γ-阶段Ni-25al和二元相(γ'+β)Ni-33al合金的环状氧化行为。在上述合金上生长的氧化物量表的不同位置。 HFO2在Ni-49A10-0.1HF中线性分布在Al 2 O 3标准中,而HFO2主要出现在Ni-25al-0.1HF和Ni-33Al-0.1HF中的尖晶石/ Al2O3界面。此外,通过HAADF-茎分析了Ni-33Al-0.1HF中HFO2的特定分布,并提出了相应的形成机制。

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  • 来源
    《Corrosion science》 |2020年第5期|108481.1-108481.10|共10页
  • 作者单位

    Beihang Univ BUAA Sch Mat Sci & Engn 37 Xueyuan Rd Beijing 100191 Peoples R China;

    Beihang Univ BUAA Sch Mat Sci & Engn 37 Xueyuan Rd Beijing 100191 Peoples R China|Beihang Univ BUAA Res Inst Frontier Sci 37 Xueyuan Rd Beijing 100191 Peoples R China|Beihang Univ BUAA Minist Ind & Informat Technol Key Lab High Temp Struct Mat & Coatings Technol 37 Xueyuan Rd Beijing 100191 Peoples R China;

    Univ Nottingham Ningbo Fac Sci & Engn Dept Mech Mat & Mfg Engn Ningbo 315100 Peoples R China;

    Beihang Univ BUAA Sch Mat Sci & Engn 37 Xueyuan Rd Beijing 100191 Peoples R China;

    Beihang Univ BUAA Sch Mat Sci & Engn 37 Xueyuan Rd Beijing 100191 Peoples R China;

    Beihang Univ BUAA Sch Mat Sci & Engn 37 Xueyuan Rd Beijing 100191 Peoples R China|Beihang Univ BUAA Res Inst Frontier Sci 37 Xueyuan Rd Beijing 100191 Peoples R China|Beihang Univ BUAA Minist Ind & Informat Technol Key Lab High Temp Struct Mat & Coatings Technol 37 Xueyuan Rd Beijing 100191 Peoples R China;

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  • 正文语种 eng
  • 中图分类
  • 关键词

    Intermetallics; Rare earth elements; STEM; Oxidation; Segregation;

    机译:金属间质量;稀土元素;茎;氧化;隔离;

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