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Search Publications by: Ursula R. Kattner (Fed)

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Displaying 76 - 100 of 165

Interfacial Reaction of Co-Fe Films with SiO_{2} Substrates

March 27, 2013
Author(s)
Leonid A. Bendersky, N. V. Kazantseva, Ursula R. Kattner, M K. Kang, Vladimir P. Oleshko, Dwight Hunter, Ichiro Takeuchi
The interdiffusion reaction between Co(1-x)Fex deposited films of various compositions (x = 0.27, 0.32 and 0.50) and an amorphous SiO2 substrate during annealing in vacuum at 800o C was identified by analytical transmission electron microscopy. The

Atom-Probe Tomographic Study of ?/?' Interfaces and Compositions in an Aged Co-Al-W Superalloy

December 12, 2012
Author(s)
Eric Lass, Kil-Won Moon, Maureen E. Williams, Carelyn E. Campbell, Ursula R. Kattner, David C. Dunand, Peter J. Bocchini, David N. Seidman
Atom-probe tomography (APT) is utilized to investigate, in a Co-9.7Al-10.8W at.% alloy aged at 900 °C for 1000 h, the phase composition and partitioning behavior of the two-phase ɣ(f.c.c.)/ɣ'(L12) microstructure. The APT composition of the ɣ-matrix (Co-8

Data in the 21st Century

August 2, 2012
Author(s)
Ursula R. Kattner
Data have always been important in the field of materials science and engineering. Important attributes and properties for such databases to fulfill data requirements of the 21st century are being evaluated.

Experimental and Thermodynamic Assessment of Phase Equilibria in the Co-Mo system

June 20, 2012
Author(s)
Katsunari Oikawa, Ursula R. Kattner, J. Sato, T. Omori, M. Jang, K. Anzai, Kiyohito Ishida
Phase equilibria of the solid phases in the Co-Mo system were investigated using two-phase alloys and the diffusion couple technique. In addition, systematic studies of phase transformations were conducted by differential scanning calorimetry, and

The Art of Data Evaluation

June 16, 2011
Author(s)
Ursula R. Kattner
The ability to critically screen the available data using the original publications is the foundation for a good evaluation. Examples for the analysis of data from different sources are given.

Integrated Computational Materials Engineering, CALPHAD and Hans Leo Lukas

October 16, 2010
Author(s)
Ursula R. Kattner, H. J. Seifert
Integrated Computational Materials Engineering (ICME) has become one of the new hot topics in materials science and engineering in recent years, and worldwide numerous conferences and symposia have been dedicated to this topic. In the report of the

Solidification of a heterogeneous Multiphase Laves-based Hydrogen Storage Alloy

August 15, 2010
Author(s)
William J. Boettinger, Dale E. Newbury, Ke Wang, Leonid A. Bendersky, Chun Chiu, Ursula R. Kattner, K. Young, B. Chao
The solidification microstructure of a nine-element Zr-Ni based AB(sub 2) type C14/C15 Laves hydrogen storage alloy is determined. The selected composition represents a class of alloys being examined for usage as a metal hydride electrode in nickel metal

Enhanced Mass Transport in Ultra-Rapidly-Heated Ni/Si Thin-Film Multilayers

November 15, 2009
Author(s)
Lawrence P. Cook, Richard E. Cavicchi, Nabil Bassim, Susie Eustis, Winnie Wong-Ng, Igor Levin, Ursula R. Kattner, Carelyn E. Campbell, Christopher B. Montgomery, William F. Egelhoff Jr., Mark D. Vaudin
We have investigated multilayer and bilayer Ni/Si thin films by nano-differential scanning calorimetry (DSC) at ultra rapid scan rates, in a temperature-time regime not accessible with conventional apparatus. DSC experiments were completed at slower scan

Calculation of Relative Thermal Elongation of Structural Steels

May 2, 2009
Author(s)
Dilip K. Banerjee, Ursula R. Kattner
In the recent past, there has been a number of studies toward predicting the thermal and structural behavior of components subjected to elevated temperature due to an exposure to fire. Numerical modeling has been applied quite extensively toward this end

A reassessment of the Al-Fe system using a four sublattice model for the DO 3 ordering

April 9, 2009
Author(s)
Ursula R. Kattner, Bo Sundman, Ikuo Ohnuma, Nathalie Dupin, S Fries
The Al-Fe system is important in many alloys and the new interest in iron aluminides makes it necessary to improve the modelling of the different ordered forms of the A2 lattice in this system. This has now been done using a 4 sublattice model based o the

Modelling of Thermodynamics and Diffusion in Multicomponent Systems

April 1, 2009
Author(s)
Ursula R. Kattner, Carelyn E. Campbell
The availability of reliable materials data is key to the successful design of materials and manufacturing processes. Commercial alloys rarely consist of only two or three elements, but rather may contain a large number of elements for which the needed