Effect of angular position on the quality of dense plasma focus-based additive layer manufactured molybdenum coatings

Fereiduni, E ; Sharif University of Technology | 2018

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  1. Type of Document: Article
  2. DOI: 10.1007/s00170-018-2673-7
  3. Publisher: Springer London , 2018
  4. Abstract:
  5. The present research aims at depositing molybdenum on stainless steel substrate using dense plasma focus (DPF) device. The varying parameter was the angular position of substrate surface from the anode tip. The deposited layers were characterized using various analyses such as X-ray diffraction (XRD), scanning electron microscopy (SEM) equipped with energy dispersive X-ray spectroscopy (EDS), atomic force microscopy (AFM), and microhardness measurements. Microstructural observations revealed that the deposited coatings had rough surfaces containing holes as well as a stripe-featured structure covering the whole surface including the interior regions of the holes and the regions among them. Higher numbers of smaller holes formed on the surface as the angular position increased to 10°, and a spongy-like coating structure was developed which contained micro-cracks passing the whole thickness of the coating. The thickness and chemical composition of the additively layer manufactured coatings were noticeably dependent on the applied angular position. The deposited coatings had higher hardness than the substrate. However, the hardness of deposited layers was not significantly influenced by changing the angular position in the range of 0° to 10°. © 2018, Springer-Verlag London Ltd., part of Springer Nature
  6. Keywords:
  7. Additive layer manufacturing ; Angular position ; Molybdenum ; Atomic force microscopy ; Energy dispersive spectroscopy ; Hardness ; Plasma devices ; Plasma theory ; Scanning electron microscopy ; Stainless steel ; Angular positions ; Chemical compositions ; Dense plasma focus ; Energy dispersive X ray spectroscopy ; Micro-structural observations ; Microhardness measurement ; Stainless steel substrates ; Coatings
  8. Source: International Journal of Advanced Manufacturing Technology ; Volume 99, Issue 9-12 , 2018 , Pages 2717-2725 ; 02683768 (ISSN)
  9. URL: https://link.springer.com/article/10.1007/s00170-018-2673-7