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Search Publications by: Lyle E. Levine (Fed)

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Displaying 51 - 75 of 134

Experimentally, How Does Cu TSV Diameter Influence its Stress State?

May 27, 2015
Author(s)
Chukwudi A. Okoro, Lyle E. Levine, Yaw S. Obeng, Ruqing Xu
In this work, an experimental study of the influence of Cu through-silicon via (TSV) diameter on stress build up was performed using synchrotron-based X-ray microdiffraction technique. Three Cu TSV diameters were studied; 3 µm, 5 µm and 8 µm, all of which

X-Ray microbeam measurements of long range internal stresses in commercial purity aluminum processed by multiple passes of equal-channel angular pressing

December 15, 2014
Author(s)
Lyle E. Levine, Thien Phan, I-Fang Lee, Jonathan Z. Tischler, Huang Yi, Alan G. Fox, Terrance G. Langdon, Mike Kassner
X-ray microbeam diffraction was used to measure long range internal stresses (LRIS) in the grain/subgrain interiors of commercial purity aluminum processed by equal-channel angular pressing for up to 8 passes. The LRIS values at +4.9o off the axial

Structural and Dynamical Studies of Acid Mediated Conversion in Amorphous-Calcium-Phosphate Based Dental Composites

October 31, 2014
Author(s)
Fan Zhang, Andrew J. Allen, Lyle E. Levine, Mark D. Vaudin, Drago Skrtic, Joseph M. Antonucci, Kathleen M. Hoffman, Anthony A. Giuseppetti, Jan Ilavsky
Amorphous calcium phosphate (ACP) based composites are promising restorative dental materials attributable to ACP's capacity to release calcium and phosphate ions through a complex reaction in which ACP is converted to its crystalline, apatitic form

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

X-Ray microbeam diffraction study of long-range internal stresses in equal-channel angular pressed aluminum

November 1, 2013
Author(s)
Lyle E. Levine, I-Fang Lee, Thien Phan, Jonathan Z. Tischler, Peter Geantil, Yi Huang, Terrance G. Langdon, Michael E. Kassner
Aluminum alloy 1050 was processed by equal-channel angular pressing (ECAP) using a single pass (equivalent uniaxial strain of about 0.88). Long-range internal stresses (LRIS) were assessed in grain/subgrain interiors by measuring the spacing of {531}

Structure stability and electronic transport of gold nanowires on BeO (0001) surface

July 12, 2013
Author(s)
Shmuel Barzilai, Francesca M. Tavazza, Lyle E. Levine
Gold nanowire chains are considered a good candidate for nanoelectronics devices since they exhibit remarkable structural and electrical properties. For practical engineering devices, -wurtzite BeO may be a useful platform for supporting these nanowires

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

X-Ray Micro-Beam Diffraction Determination of Full Stress Tensors in Cu TSVs

May 28, 2013
Author(s)
Chukwudi A. Okoro, Lyle E. Levine, Oleg A. Kirillov, Yaw S. Obeng, Ruqing Xu, Jonathan Z. Tischler, Wenjun Liu, Klaus Hummler
We report the first non-destructive, depth resolved determination of the full stress tensor in Cu through-silicon vias (TSVs), using synchrotron based micro-beam X-ray diffraction. Two adjacent Cu TSVs were studied; one deliberately capped with SiO2, the

The increase in conductance of a gold single atom chain during elastic elongation

February 7, 2013
Author(s)
Francesca Tavazza, Shmuel Barzilai, Douglas T. Smith, Lyle E. Levine
The conductance of monoatomic gold wires has been studied using ab initio calculations and the transmission was found to vary with the elastic strain. Counter-intuitively, the conductance was found to increase for the initial stages of the elongation

Submicrometer-Resolution Polychromatic 3D X-Ray Microscopy

January 15, 2013
Author(s)
B C. Larson, Lyle E. Levine
The ability to study the structure, microstructure, and evolution of materials with increasing spatial resolution is fundamental to achieving a full understanding of the underlying science of materials. Polychromatic 3D x-ray microscopy (3DXM) is a