MUMBAI, India, June 16 -- Intellectual Property India has published a patent application (202611054729 A) filed by Indian Institute Of Technology, Rupnagar, Punjab, on April 29, for 'method for enhancing inter-splat bonding in cold-sprayed martensitic alloy deposits using selective infrared post-treatment.'
Inventor(s) include Vinay Gidla; Nadeem Akthar; Ravi Kant; and Harpreet Singh.
The application for the patent was published on June 5, under issue no. 23/2026.
According to the abstract released by the Intellectual Property India: "The present invention relates to a method for improving bonding in cold-sprayed metallic deposits. A cold-sprayed deposit (101) is formed by accelerating metal powder particles toward a substrate using a high-velocity gas stream, causing the particles to plastically deform and form flattened splats stacked in layers. During deposition, a tamping effect results in densification of lower layers and comparatively weaker bonding in upper layers, creating a bonding gradient through the deposit thickness. According to the invention, the cold-sprayed deposit (101) is subjected to infrared radiation emitted from an infrared source (102) positioned to preferentially heat the upper surface of the deposit. The infrared radiation generates a surface-to-depth temperature gradient that activates diffusion, stress relaxation, and oxide disruption at splat interfaces, thereby forming an enhanced bonding region (103). The method improves inter-splat bonding, reduces porosity, and enhances corrosion resistance of coatings, particularly for alloys exhibiting limited plasticity during cold spray deposition."
Disclaimer: Curated by HT Syndication.
