Cold spraying: A low temperature variant of thermal spray techniques to deposit metallic materials

  • Kumar S Centre for Engineered Coatings, International Advanced Research Centre for Powder Metallurgy and New Materials (ARCI), Balapur Po., Hyderabad 500 005, India
  • Naveen M Chavan Centre for Engineered Coatings, International Advanced Research Centre for Powder Metallurgy and New Materials (ARCI), Balapur Po., Hyderabad 500 005, India.
  • Srinivasa Rao D Centre for Engineered Coatings, International Advanced Research Centre for Powder Metallurgy and New Materials (ARCI), Balapur Po., Hyderabad 500 005, India
Keywords: Cold spray, bonding mechanism

Abstract

Cold spraying is a novel material deposition process in which micron size particles are accelerated to supersonic velocity on to a metallic substrate to obtain thick and dense coatings. Unlike other thermal spray coatings, the bonding mechanism is completely different. In conventional thermal spray techniques, melting and solidification upon impact dominates the bonding mechanism. In cold spraying, Plastic deformation induced adiabatic shear instability governs the bonding process in which adiabatic temperature rise, plastic strain at interface and flow stress collapse play a crucial role. Variety of material including pure metals, alloys, composites and cermets have been deposited using cold spraying for variety of applications. In this article, a brief introduction about the bonding mechanism and potential applications of cold spraying is being discussed.

Downloads

Download data is not yet available.

References

H. Assadi, F. Gartner, T. Stoltenhoff and H. Kreye, Bonding mechanism in cold gas spraying, Acta Mater. 51 (2003) 4379-4394.

G. Bae, Y. Xiong, S. Kumar, K. Kang and C. Lee, General aspects of interface bonding in kinetic sprayed coatings, Acta Mater. 56 (2008) 4858 - 4868.

S. Kumar, G. Bae, K. Kang, S. Yoon and C. Lee, Effect of powder state on the deposition behaviour and coating development in kinetic spray process, J. Phys. D: Appl. Phy. 42 (2009) 075305 - 8.

S. Kumar, V. Vidyasagar, A. Jyothirmayee and S. V. Joshi, Effect of heat treatment on mechanical properties and corrosion performance of cold sprayed tantalum coatings, J. Therm. Spray. Technol. 25 (4) (2016) 745-756.

S.Kumar, A.Jyothirmayi, Nitin Wasekar and S.V. Joshi, Influence of annealing on mechanical and electrochemical properties of cold sprayed niobium coatings, Surf.Coat Technol, 296 (2016),124-135.

Naveen Manhar Chavan, M. Ramakrishna, P. Sudarshan Phani, D. Srinivasa Rao and G. Sundararajan, The influence of process parameters and heat treatment on the properties of cold sprayed silver coatings, Surf. Coat. technol, 205(2011) 4798-4807.

Naveen Manhar Chavan, B. Kiran, A. Jyothirmayi, P. Sudarshan Phani and G. Sundararajan, The Corrosion Behavior of Cold Sprayed Zinc Coatings on Mild Steel Substrate, J Therm Spray Technol, 22(2013)463-470.

Published
2019-05-30