TY - JOUR
T1 - Nanopowder deposition by supersonic rectangular jet impingement
AU - Shukla, V.
AU - Elliott, G. S.
AU - Kear, B. H.
N1 - Funding Information:
We acknowledge the support of the Office of Naval Research through Grant No. (N00014-97-1-0844) for the Advanced Coating Technology Development Program monitored by Dr. Lawrence Kabacoff. We also acknowledge the discussions on the CGDS process with Dr. R. Neiser, Sandia National Labs. Thanks are due to the staff at Rutgers University for help in running the nozzle and for analysis of coatings.
PY - 2000/9
Y1 - 2000/9
N2 - With a view toward developing the next generation of coatings using nanopowders, a cold gas dynamic spray (CGDS) technique has been investigated. In this method, a powder feeder is used to inject nanopowder agglomerates into a supersonic rectangular jet, with a design Mach number of 3.2. The powder particles gain speeds of up to 700 m/s through momentum transfer from the jet and bond to the substrate surface due to kinetic energy dissipation. Coatings of copper and nano-WC/10% Co on steel and aluminum substrates (3 to 5 μm in thickness) have been produced. The benefit of this process is that the material does not undergo any chemical changes during coating formation. To improve the quality of the coatings produced, the flapping motions produced by supersonic jet impingement were studied. Powder particle velocities and the jet impingement flow field were quantified using particle image velocimetry (PIV).
AB - With a view toward developing the next generation of coatings using nanopowders, a cold gas dynamic spray (CGDS) technique has been investigated. In this method, a powder feeder is used to inject nanopowder agglomerates into a supersonic rectangular jet, with a design Mach number of 3.2. The powder particles gain speeds of up to 700 m/s through momentum transfer from the jet and bond to the substrate surface due to kinetic energy dissipation. Coatings of copper and nano-WC/10% Co on steel and aluminum substrates (3 to 5 μm in thickness) have been produced. The benefit of this process is that the material does not undergo any chemical changes during coating formation. To improve the quality of the coatings produced, the flapping motions produced by supersonic jet impingement were studied. Powder particle velocities and the jet impingement flow field were quantified using particle image velocimetry (PIV).
UR - http://www.scopus.com/inward/record.url?scp=0034271569&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0034271569&partnerID=8YFLogxK
U2 - 10.1361/105996300770349854
DO - 10.1361/105996300770349854
M3 - Article
AN - SCOPUS:0034271569
SN - 1059-9630
VL - 9
SP - 394
EP - 398
JO - Journal of Thermal Spray Technology
JF - Journal of Thermal Spray Technology
IS - 3
ER -