title: Evidence for tip velocity oscillations in dendritic solidification.
abstract: Dendritic growth experiments were conducted in the reduced-convection environment aboard the space shuttle Columbia on STS-87. Spectral analysis was performed on 30-frame/s video data during growths of isothermal dendrites. Results indicate that pivalic acid dendrites exhibit a subtle oscillatory behavior of the axial growth velocity near the tip, with a frequency component that is associated with the sidebranch formation process.
authors.affiliation: Metallurgical and Materials Engineering, Mackay School of Mines, University of Nevada, Reno, Nevada 89436, USA. lacomj@mines.unr.edu
authors.forename: J C
authors.initials: JC
authors.lastname: LaCombe
authors.forename: M B
authors.initials: MB
authors.lastname: Koss
authors.forename: J E
authors.initials: JE
authors.lastname: Frei
authors.forename: C
authors.initials: C
authors.lastname: Giummarra
authors.forename: A O
authors.initials: AO
authors.lastname: Lupulescu
authors.forename: M E
authors.initials: ME
authors.lastname: Glicksman