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Journal of Thermal Spray Technology

, Volume 26, Issue 3, pp 350–359 | Cite as

A Method to Predict the Thickness of Poorly-Bonded Material Along Spray and Spray-Layer Boundaries in Cold Spray Deposition

  • Yangfan Li
  • Yukitaka Hamada
  • Katsunori Otobe
  • Teiichi Ando
Peer Reviewed

Abstract

Multi-traverse CS provides a unique means for the production of thick coatings and bulk materials from powders. However, the material along spray and spray-layer boundaries is often poorly bonded as it is laid by the leading and trailing peripheries of the spray that carry powder particles with insufficient kinetic energy. For the same reason, the splats in the very first layer deposited on the substrate may not be bonded well either. A mathematical spray model was developed based on an axisymmetric Gaussian mass flow rate distribution and a stepped deposition yield to predict the thickness of such poorly-bonded layers in multi-traverse CS deposition. The predicted thickness of poorly-bonded layers in a multi-traverse Cu coating falls in the range of experimental values. The model also predicts that the material that contains poorly bonded splats could exceed 20% of the total volume of the coating.

Keywords

cold spray deposition efficiency splat bonding thick coating 

Notes

Acknowledgment

The authors at Northeastern University thank Fukuda Metal Foil & Powder Co., Ltd, for the financial support of this work.

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Copyright information

© ASM International 2016

Authors and Affiliations

  • Yangfan Li
    • 1
  • Yukitaka Hamada
    • 2
  • Katsunori Otobe
    • 2
  • Teiichi Ando
    • 1
  1. 1.Department of Mechanical and Industrial EngineeringNortheastern UniversityBostonUSA
  2. 2.R&D DepartmentFukuda Metal Foil & Powder Co., Ltd.KyotoJapan

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