CORE-Materials
Cold Gas Dynamic Spray (CGDS): as-sprayed Al/Ti deposits
Cold gas dynamic spray, CGDS (or kinetic spray) is a rapidly developing coating and manufacturing technology in which metal particles are deposited at velocities of over 700 m/s without significant melting. The severe plastic deformation of the particles on impact produces a deposit that is very dense, with low oxide content and no thermally induced tensile stresses. This image is an optical micrograph on as-sprayed Al/Ti deposits (feedstock mixture of spherical Al and irregular sponge Ti powders), showing characteristic duplex microstructure. The as-sprayed state shown consists of an Al “matrix” with larger irregular particles of sponge Ti embedded in it. As can be seen, the small Al particles have coalesced into a single mass, by plastic deformation, with just few pores being visible (porosity is less than 3%). The Al/Ti mixture was deposited using a CGDS system, build in the Institute for Manufacturing, Department of Engineering, University of Cambridge. Image courtesy of Dr. Tatiana Novoselova, The University of Liverpool.
Cold Gas Dynamic Spray (CGDS): as-sprayed Al/Ti deposits
Cold gas dynamic spray, CGDS (or kinetic spray) is a rapidly developing coating and manufacturing technology in which metal particles are deposited at velocities of over 700 m/s without significant melting. The severe plastic deformation of the particles on impact produces a deposit that is very dense, with low oxide content and no thermally induced tensile stresses. This image is an optical micrograph on as-sprayed Al/Ti deposits (feedstock mixture of spherical Al and irregular sponge Ti powders), showing characteristic duplex microstructure. The as-sprayed state shown consists of an Al “matrix” with larger irregular particles of sponge Ti embedded in it. As can be seen, the small Al particles have coalesced into a single mass, by plastic deformation, with just few pores being visible (porosity is less than 3%). The Al/Ti mixture was deposited using a CGDS system, build in the Institute for Manufacturing, Department of Engineering, University of Cambridge. Image courtesy of Dr. Tatiana Novoselova, The University of Liverpool.