15 Result(s)

Article

Confirmation of Anomalous Nucleation in Zirconium

Pure, low-oxygen zirconium samples have been observed to nucleate a solid phase under conditions during which the sample was expected to remain liquid. This phenomenon was first seen during Spacelab Mission MS...

G. P. Bracker, S. Schneider, R. Wunderlich, H. Fecht, J. Zhao, R. W. Hyers in JOM (2020)

Chapter and Conference Paper

Electroplating Powder for Cold Spray Applications

is a processing technique in which powder particles are accelerated toward a substrate on which they deposit and build a . In this process, it is essential to balance the velocity of the particle with the ...

G. P. Bracker, E. Hodges, M. Scott… in TMS 2020 149th Annual Meeting & Exhibition… (2020)

Article

Nucleation and Thermophysical Properties of Glass-Forming Liquids

The intimate links among structure, nucleation, and thermophysical properties are demonstrated from a few select experiments on high-melting-temperature metallic alloy liquids, made possible by containerless p...

A. K. Gangopadhyay, R. W. Hyers, K. F. Kelton in JOM (2012)

Article

Containerless processing of a lithium disilicate glass

Glasses of Li₂O · 2SiO₂ (LS₂), and LS₂ doped with 0.001 wt% platinum (LS₂ + 0.001 wt% Pt) compositions were melted, cooled and reheated at controlled rates while levitated (containerless) inside an electrostatic ...

K. S. Ranasinghe, C. S. Ray, D. E. Day, J. R. Rogers… in Journal of Materials Science (2007)

Article

Surface Oscillations of an Electromagnetically Levitated Droplet

The natural oscillation frequency of freely suspended liquid droplets can be related to the surface tension of the material, and the decay of oscillations to the liquid viscosity. However, the fluid flow insid...

S. R. Berry, R. W. Hyers, L. M. Racz, B. Abedian in International Journal of Thermophysics (2005)

Article

Surface Tension and Viscosity of Quasicrystal-Forming Ti–Zr–Ni Alloys

Recent X-ray scattering measurements show that icosahedral short-range order in Ti–Zr–Ni alloys is responsible for a change in phase selection from the stable C14 Laves phase to the quasicrystalline icosahedra...

R. W. Hyers, R. C. Bradshaw, J. R. Rogers… in International Journal of Thermophysics (2004)

Article

Undercooling And X-Ray Structural Studies Of Ti-Zr-Ni Liquids

Maximum undercooling results for the icosahedral phase (i-phase), polytetrahedral C14 Laves phase, and solid solution phases are presented as a function of composition in Ti-Zr-Ni liquids. Containerless proces...

G. W. Lee, A. K. Gangopadhyay, K. F. Kelton, R. W. Hyers… in MRS Online Proceedings Library (2003)

Article

Laminar-turbulent transition in an electromagnetically levitated droplet

During experiments on the MSL-1 (first microgravity science laboratory) mission of the space shuttle (STS-83 and STS-94, April and July 1997), a droplet of palladium-silicon alloy was electromagnetically levit...

R. W. Hyers, G. Trapaga, B. Abedian in Metallurgical and Materials Transactions B (2003)

Article

Triggered nucleation in Ni₆₀Nb₄₀ using an electrostatic levitator

T. J. Rathz, M. B. Robinson, R. W. Hyers… in Journal of Materials Science Letters (2002)

Article

Modeling of turbulent flow in electromagnetically levitated metal droplets

This article details an effort to improve the understanding and prediction of turbulent flow inside a droplet of molten metal levitated in an electromagnetic field. It is shown that the flow field in a test ca...

S. Berry, R. W. Hyers, B. Abedian, L. M. Racz in Metallurgical and Materials Transactions B (2000)