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Search Publications by: Ursula R. Kattner (Fed)

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Displaying 101 - 125 of 165

Alloy Selection

October 16, 2008
Author(s)
C A. Handwerker, Ursula R. Kattner, Kil-Won Moon, J Bath, E -. Bradley, P Snugovsky
In this chapter, the key results and analyses leading to the choice of tin-silver-copper alloys by NEMI as the new national standard Pb-free solder system are discussed in detail. These include data on phase transformations in solders (including melting

The Effect of Bi Contamination on the Solidification Behavior of Sn-Pb Solders

October 16, 2008
Author(s)
Kil-Won Moon, Ursula R. Kattner, C A. Handwerker
This paper presents experimental results and theoretical calculations that evaluate the effects of Bi contamination on the solidification behavior of Sn-Pb alloys. The pasty (mushy) range, the type of solidification path, and the microstructure of the

Thermodynamic Assessment of the Co-Mo System

October 16, 2008
Author(s)
Albert Davydov, Ursula R. Kattner
The experimental thermochemical and phase diagram data for the Co-Mo system were assessed. A consistent thermodynamic description, using a Redlich-Kister model for the solution phases and sublattice and line compound models for the intermetallics, was

Efficient Phase Diagram Information and Computational Thermodynamics

April 28, 2006
Author(s)
Ursula R. Kattner
Industries that process and use metals, from microelectronics to aerospace, can use phase equilibria data for complex alloys (three or more components) and diffusion data for controlling the formation and dissolution of precipitate phases within a matrix

Contribution to the Zn-Rich Part of the Zn-Zr Phase Diagram

August 11, 2004
Author(s)
Maureen E. Williams, William J. Boettinger, Ursula R. Kattner
The reaction of zinc vapor with Zircaloy-4 and nuclear grade zirconium was investigated with various analytical techniques: optical metallography, scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray diffraction. Based on

Databases for Computational Thermodynamics and Diffusion Modeling

October 1, 2003
Author(s)
Ursula R. Kattner, J E. Morral, William J. Boettinger
tabases for computational thermodynamics and diffusion modeling can be applied to the prediction of phase diagrams and microstructural evolution. These can be used for alloy and process design as well as to improve modeling capabilities that would decrease

Revised Thermodynamic Description for the Co-Mo System

June 1, 2003
Author(s)
Albert Davydov, Ursula R. Kattner
The previously assessed Co-Mo system (1999Dav) has been partially revised: thermodynamic descriptions for the liquid, , ς and bcc phases were amended in the attempt to eliminate some unrealistic phase diagram features, such as inverse liquid miscibility