Effect of Microstructure and Properties of Ni-WC Composite Coatings on Their Solid Particle Erosion Behavior
| Autor: | Jolanta E. Klemberg-Sapieha, Richard R. Chromik, S.A. Alidokht, Steve Yue, Jacques Lengaigne |
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| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Materials science Scanning electron microscope Mechanical Engineering Drop (liquid) Metal matrix composite Composite number Gas dynamic cold spray 02 engineering and technology 021001 nanoscience & nanotechnology Microstructure 01 natural sciences Metal Mechanics of Materials visual_art 0103 physical sciences visual_art.visual_art_medium Erosion General Materials Science Composite material 0210 nano-technology |
| Zdroj: | Journal of Materials Engineering and Performance. 28:1532-1543 |
| ISSN: | 1544-1024 1059-9495 |
| Popis: | Metal matrix composites (MMCs) of WC in Co or Ni matrices are widely used due to their high wear resistance. Previous studies showed that tailoring the mechanical properties through optimum WC content can significantly extend the life cycle of MMCs. In this study, composite coatings of Ni with various WC content ranging from 10 to 55 vol.% were cold sprayed using agglomerated WCNi powders and two different sizes of Ni powders, − 10 + 4 (d50 = 7 µm) referred to as Ni(7) and − 35 + 15 (d50 = 25 µm) to as Ni(25). Microstructural characterization, including the deformed structure of Ni splats and retention and distribution of WC, was performed by scanning electron microscopy (SEM). Composite coatings were subjected to solid particle erosion following ASTM G76-13 standard. At low WC content coatings, erosion occurred primarily by plastic deformation of Ni matrices and knocking out of WC particles. At high WC concentrations, network distribution of compacted WCNi particles in the matrices led to a significant drop in erosion rates of coatings, due to a change in erosion mechanism from severe cutting and plowing of Ni and WC dislodging to WCNi splats spalling. Composite coatings sprayed using finer size Ni powder were usually more erosion resistant. |
| Databáze: | OpenAIRE |
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