Toward understanding the microstructure and electrical resistivity of thermal-sprayed high-entropy alloy coatings

被引:0
|
作者
Sanhita Pal
Rakesh Bhaskaran Nair
André McDonald
机构
[1] University of Alberta,Department of Mechanical Engineering
来源
Journal of Materials Science | 2022年 / 57卷
关键词
D O I
暂无
中图分类号
学科分类号
摘要
High-entropy alloys (HEAs) are a new class of advanced metallic alloys that have received significant attention in recent years due to their stable microstructures and promising properties. However, exploration of the functional properties of these alloys as thermal-sprayed coatings has not been undertaken so far. In the present study, novel equiatomic AlCoCrFeMo, AlCoCrFeMoW, and AlCoCrFeMoV HEA coatings were fabricated using flame spraying to understand the impact of tungsten (W) and vanadium (V) additions in AlCoCrFeMo HEA coatings on microstructure evolutions, phase formations, microhardness, and electrical resistivity. The microstructure revealed the occurrence of mixed oxides and BCC phases, with an apparent porosity range between 2 and 4%. Despite the lower fraction of oxide phases, higher hardness was achieved for AlCoCrFeMoV HEA coatings (714 ± 64 HV), followed by AlCoCrFeMoW (609 ± 61 HV) and AlCoCrFeMo (592 ± 58 HV) HEA coatings. The higher hardness might be attributed to combined interactions of hard oxide phases, solid solution strengthening, and BCC phases. The electrical resistivity values showed a noticeable difference between HEA coatings and control Ni–20Cr coatings, whereby higher electrical resistivity values were achieved for AlCoCrFeMo HEA coatings due to topological lattice distortion and higher oxide fractions. Joule heating testing showed a higher rate of increase in surface temperature for all the HEA coatings than that of Ni–20Cr flame-sprayed coatings for a given electrical power input. The results suggest that the improved electrical properties and heating performance capabilities of flame-sprayed HEA coatings make them an excellent choice for use in high load resistive heating applications.
引用
收藏
页码:20928 / 20944
页数:16
相关论文
共 50 条
  • [41] An Integrated Assessment of Process-Microstructure-Property Relationships for Thermal-Sprayed NiCr Coatings
    Alfredo Valarezo
    Sanjay Sampath
    Journal of Thermal Spray Technology, 2011, 20 : 1244 - 1258
  • [42] Research Progress of High-Entropy Alloy Coatings
    Cui Hongzhi
    Jiang Di
    ACTA METALLURGICA SINICA, 2022, 58 (01) : 17 - 27
  • [43] High-Entropy Alloy Coatings: State and Prospects
    Gromov V.E.
    Konovalov S.V.
    Peregudov O.A.
    Efimov M.O.
    Shlyarova Y.A.
    Steel in Translation, 2022, 52 (10) : 899 - 906
  • [44] Microstructure, hardness, resistivity and thermal stability of sputtered oxide films of AlCoCrCu0.5NiFe high-entropy alloy
    Huang, Yuan-Sheng
    Chen, Ling
    Lui, Hong-Wei
    Cai, Ming-Hong
    Yeh, Jien-Wei
    MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2007, 457 (1-2): : 77 - 83
  • [45] Electrochemical Behavior, Microstructure, and Surface Chemistry of Thermal-Sprayed Stainless-Steel Coatings
    Nascimento, Alexandre R. C.
    Gateman, Samantha Michelle
    Mauzeroll, Janine
    Savoie, Sylvio
    Schulz, Robert
    Moreau, Christian
    COATINGS, 2019, 9 (12)
  • [46] Multiscale mechanical performance and corrosion behaviour of plasma sprayed AlCoCrFeNi high-entropy alloy coatings
    Meghwal, Ashok
    Anupam, Ameey
    Luzin, Vladimir
    Schulz, Christiane
    Hall, Colin
    Murty, B. S.
    Kottada, Ravi Sankar
    Berndt, Christopher C.
    Ang, Andrew Siao Ming
    JOURNAL OF ALLOYS AND COMPOUNDS, 2021, 854
  • [47] Research Progress of High-entropy Alloy Coatings
    Li X.
    Wang Y.-Q.
    Zhang J.-Y.
    Wu K.
    Liu G.
    Sun J.
    Surface Technology, 2023, 52 (01): : 1 - 20
  • [48] Plasma sprayed high-entropy alloy coatings with enhanced water splitting activity in alkaline environment
    Huo, Xiaoran
    Zhang, Yuanwu
    Zhong, Jinyuan
    Nie, Sainan
    Zuo, Xiaojiao
    Xu, Xuelu
    Zhang, Nannan
    MATERIALS TODAY COMMUNICATIONS, 2024, 41
  • [49] An Integrated Assessment of Process-Microstructure-Property Relationships for Thermal-Sprayed NiCr Coatings
    Valarezo, Alfredo
    Sampath, Sanjay
    JOURNAL OF THERMAL SPRAY TECHNOLOGY, 2011, 20 (06) : 1244 - 1258
  • [50] Microstructure and Wear Behavior of Atmospheric Plasma-Sprayed AlCoCrFeNiTi High-Entropy Alloy Coating
    Li-Hui Tian
    Wei Xiong
    Chuan Liu
    Sheng Lu
    Ming Fu
    Journal of Materials Engineering and Performance, 2016, 25 : 5513 - 5521