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Fabrication of WC-based Metal Matrix Composite Coatings via Low-pressure Cold Spraying for Enhanced Surface Properties.

机译：通过低压冷喷涂制造基于WC的金属基复合涂层，以增强表面性能。

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摘要

A low-cost, low-pressure cold spray unit was used to fabricate tungsten carbide (WC)-based metal matrix composite (MMC) coatings. A variety of coatings were fabricated and characterized. Scanning electron microscopy (SEM), coupled with image analysis, Vickers micro-hardness, and X-ray diffraction (XRD) were used to characterize the coatings. Image analysis was used to determine the WC content in the coatings and the mean free path between the reinforcing particles. The WC content in the coating increased as the WC content in the powder blend increased. As the WC content in the powder increased, the coating porosity decreased and the WC deposition efficiency increased. ASTM standard G65-2004 dry abrasion testing was conducted on WC-Ni coatings to determine a relationship between hardness and wear resistance. A linear relationship was observed between the wear rate and hardness of the WC-Ni MMC coatings. The coating deemed optimal had a wear rate comparable to those of WC-Co coatings fabricated by high-velocity oxy-fuel (HVOF) and high-pressure cold spraying.
机译：低成本，低压冷喷涂装置用于制造碳化钨（WC）基金属基复合材料（MMC）涂层。制备并表征了各种涂层。扫描电子显微镜（SEM）结合图像分析，维氏显微硬度和X射线衍射（XRD）用于表征涂层。使用图像分析来确定涂层中的WC含量以及增强颗粒之间的平均自由程。涂料中的WC含量随着粉末混合物中WC含量的增加而增加。随着粉末中WC含量的增加，涂层孔隙率降低，WC沉积效率提高。在WC-Ni涂层上进行了ASTM标准G65-2004干磨试验，以确定硬度和耐磨性之间的关系。在WC-Ni MMC涂层的磨损率和硬度之间观察到线性关系。被认为是最佳的涂层，其磨损率可与通过高速含氧燃料（HVOF）和高压冷喷涂制造的WC-Co涂层相比。

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  • 作者

    Melendez, Natanael Manuel.;

  • 作者单位

    University of Alberta (Canada).;

  • 授予单位 University of Alberta (Canada).;
  • 学科 Engineering Mechanical.
  • 学位 M.Sc.
  • 年度 2013
  • 页码 111 p.
  • 总页数 111
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 老年病学;
  • 关键词

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