Processing of Cu–Al–Ni Alloy by Spray Atomization and Deposition Process
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The present work describes a new route for the preparation of Cu–Al–Ni alloy strips via spray atomization and deposition route. The route consists of atomizing liquid Cu–Al–Ni alloy with a jet of argon gas in a closed chamber, at a pressure of 1 MPa. The semi-solid Cu–Al–Ni droplets are subsequently collected on the steel substrate placed vertically below the liquid metal stream in the atomization chamber to form a three-dimensional preform. The deposit produced on the substrate contains ~ 5% porosity. The microstructural details of the spray deposited Cu–Al–Ni strips explains particularly the presence of porosity, formation of splats during the flight of spray casting and the associated microstructural evolution in Cu–Al–Ni spray deposit are explained.
KeywordsSpray atomization Spray deposition Cu–Al–Ni alloys Splat formation Solidification Strip
This part of the research was carried out under the supervision of Dr. R.K. Dube and facilitated by Dr. S.K. Vajpai during the Master’s program of corresponding author (Ashish Agrawal) at Indian Institute of Technology, Kanpur, India. The authors would like to recall Mr. Sheelendra Agnihotri who helped in carrying out the experiments.
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