U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Publications by:

Search Title, Abstract, Conference, Citation, Keyword or Author
Displaying 26 - 50 of 88

An Ordered Metallic-Glass Solid-Solution Phase That Grows From the Melt Like a Crystal

January 1, 2014
Author(s)
Lyle E. Levine, Karena Chapman, Leonid A. Bendersky, Gabrielle G. Long, John W. Cahn, Peter Chupas, Judith K. Stalick, Frederic Mompiou
We used high-energy synchrotron-based X-ray scattering to investigate the structure of an isotropic AlFeSi metallic glass that nucleates and grows from the melt during rapid cooling like a crystal. The glass is a noncrystalline homogeneous metastable phase

A highly ordered non-crystalline metallic phase

July 5, 2013
Author(s)
Gabrielle G. Long, Karena Chapman, Peter Chupas, Leonid A. Bendersky, Lyle E. Levine, Frederic Mompiou, John W. Cahn, Judith K. Stalick
We report the characterization of an ordered non-crystalline isotropic metallic solid that, during rapid cooling of an Al-Fe-Si melt, forms by nucleation, followed by growth along a moving interface between the solid and melt with partitioning of the

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

Mg-Fe Thin Films: A Phase-separated Structure with Fast Kinetics of Hydrogenation

September 20, 2012
Author(s)
Shiyou Zheng, Ke Wang, Vladimir Oleshko, Leonid A. Bendersky
In this paper we suggest a new approach to improve the kinetics of hydrogenation based on a material with high density of interfaces between hydride-forming solid (HFS) and hydrogen-diffusing solid media (HDM). Such materials can be realized for phase

Ti_(12.5)Zr_(21)V_(10)Cr_(8.5)Mn_(x)Co_(1.5)Ni_(46.5-x)AB_(2)-type metal hydride alloys for electrochemical storage application: Part 1. Structural characteristics

August 3, 2012
Author(s)
Leonid A. Bendersky, Ke Wang, Igor Levin, Dale E. Newbury, K. Young, B. Chao, Adam A. Creuziger
The microstructures of a series of AB_(2)-based metal hydride alloys (Ti_(12.5)Zr_(21)V_(10)Cr_(8.5)Mn_(x)Co_(1.5)Ni_(46.5-x)) designed to have different fractions of non-Laves secondary phases were studied by x-ray diffraction, scanning electron

Development of a combinatorial characterization scheme for high-throughput investigations of hydrogen storage materials.

December 16, 2011
Author(s)
Jason Hattrick-Simpers, Z. Tan, H. Oguchi, Chun Chiu, Edwin J. Heilweil, James E. Maslar, Leonid A. Bendersky
In order to reliably increase the throughput of materials measured for hydrogen storage properties, a complete high-throughput characterization scheme has been developed that accurately measures the hydrogen storage properties of materials in quantities

Discovery of giant magnetostriction in annealed Co1-xFex thin-films

November 1, 2011
Author(s)
Dwight Hunter, William Alexander Osborn, Ke Wang, Nataliya Kazantseva, Jason Hattrick-Simpers, Richard Suchoski, Ryota Takahashi, Marcus L. Young, Apurva Mehta, Leonid A. Bendersky, Sam E. Lofland, Manfred Wuttig, Ichiro Takeuchi
Chemical and structural heterogeneity and resulting interaction of coexisting phases can lead to extraordinary behaviors in oxides as observed in piezoelectric materials at morphotropic phase boundaries and relaxor ferroelectrics. But such phenomena are

Examination of Multiphase (Zr,Ti)(V,Cr,Mn,Ni)2 Ni-MH Electrode Alloys. Part 2: Solid-State Transformation of the Interdendritic B2 Phase Phase

August 15, 2010
Author(s)
Leonid A. Bendersky, Ke Wang, William J. Boettinger, Dale E. Newbury, K. Young, B. Chao
Multi-component Zr-Ti-Ni-TM (TM=V, Cr, Mn and Co) cast alloys intended for use as negative electrodes in Ni metal hydride batteries were studied to determine the solidification microstructure and solidification path in the Part I of this paper. Part II of

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

Raman spectroscopic observation of dehydrogenation in ball-milled LiNH2-LiBH4-MgH2 nanoparticles

April 3, 2010
Author(s)
Jason Hattrick-Simpers, Chun Chiu, James E. Maslar, Leonid A. Bendersky, Michael E. Niemann, Sesha S. Srinivasan, Elias K. Stefanakos
In situ Raman spectroscopy was used to monitor the dehydrogenation of ball-milled mixtures of LiNH2 LiBH4 MgH2 nanoparticles. The as-milled powders were found to contain a mixture of Li4BN3H10 and Mg(NH2)2, with no evidence of residual LiNH2 or LiBH4. It

Observation of Phase Transitions in Hydrogenated Y Films Via IR Emissivity Imaging

October 20, 2009
Author(s)
Jason Hattrick-Simpers, Ke Wang, Raymond Cao, Chun Chiu, Edwin J. Heilweil, Robert G. Downing, Leonid A. Bendersky
Direct observation of a sequence of phase transitions during hydrogenation of Y thin films has been realized through the use of in-situ isothermal IR emissivity measurements. The formation of different phases, α-Y(H), YH2 and YH3, has been identified based

An infrared imaging high-throughput combinatorial method for investigating new phase formation and hydrogen storage capacities of thin films

July 15, 2009
Author(s)
Jason Hattrick-Simpers, Leonid A. Bendersky, Edwin J. Heilweil, H. Oguchi, Ichiro Takeuchi
We have refined and expanded on the capabilities of rapid screening, which utilizes infrared (IR) emissivity imaging. A complete procedure for using infrared emissivity to characterize the hydrogen storage properties of thin-film samples is described. The

Combinatorial Study of Thin Film Metal Hydride by Prompt Gamma Activation Analysis

June 19, 2009
Author(s)
Raymond Cao, Jason Hattrick-Simpers, Richard Bindel, Bryan E. Tomlin, Rolf L. Zeisler, Rick L. Paul, Leonid A. Bendersky, Robert G. Downing
Cold neutron prompt gamma activation analysis (PGAA) was used to determine the amount of hydrogen in thin film Mg hydrides with varying hydrogenation times. The results suggest that the hydrogenation in the Mg thin films remains unsaturated even after 48

Elastic Modulus of Faceted Aluminum Nitride Nanotubes Measured by Contact Resonance Atomic Force Microscopy

December 17, 2008
Author(s)
Gheorghe Stan, C Ciobanu, Timothy Thayer, George Wang, Randall Creighton, Premsagar P. Kavuri, Leonid A. Bendersky, Robert F. Cook
A new methodology for determining the radial elastic modulus of a one-dimensional nanostructure laid on a substrate has been developed. The methodology consists of the combination of contact resonance atomic force microscopy (AFM) with finite element

Infrared emission imaging as a tool for characterization of hydrogen storage materials

December 6, 2008
Author(s)
H. Oguchi, Edwin J. Heilweil, Daniel Josell, Leonid A. Bendersky
Combinatorial thin films provide an opportunity for studying a variety of properties over a wide range of compositions and microstructures on a single substrate, allowing substantial acceleration of both the fabrication and study of materials and their

Electrodeposited Epitaxial Fe Subscript 100-x}Co Subscript x} Films on GaAs

October 16, 2008
Author(s)
J Mallett, Erik B. Svedberg, Mark D. Vaudin, Leonid A. Bendersky, William F. Egelhoff Jr., Thomas P. Moffat
The electrodeposition of epitaxial cube-on-cube Fe _(subscript) 100-x}Co_(subscript) x} films onto n-GaAs is described from ferrous ammonium sulfate solutions containing various concentrations of cobalt sulfate. The cobalt composition in a series of 400nm

Special Grain Boundaries Based on Local Symmetries

October 16, 2008
Author(s)
Leonid A. Bendersky, John W. Cahn
We propose that the operational local symmetries, rather than a coincidence site lattice (CSL), is important for the creation of special, low energy, grain boundaries (b) in large unit cell structures. We illustrate this with a Durer tiling, and its