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.

Journals

A New Effective Method for Thermal Annealing of Magnetic Tunnel Junctions in Air With Ru, Au, Al₂O₃ as Protective Overlayers

October 16, 2008

Author(s)

Philip Pong, Moshe Schmoueli, F Li, William F. Egelhoff Jr.

Thermal annealing is an important process to enhance greatly the tunneling magnetoresistance (TMR) of magnetic tunnel junctions (MTJs). MTJ annealing is...

Superhydrophibicity as a Multiscale Phenomenon

October 16, 2008

Author(s)

Michael Nosonovsky

Wetting of superhydrophobic surfaces is studied as a multiscale process involving the macroscale (water droplet size), microscale (surface texture size), and...

Line-Shape Analysis of Poly(3-dodecylthiophene): A Study of Layer Disorder Through the Liquid Crystalline Polymer Transition

October 16, 2008

Author(s)

T J. Prosa, J Moulton, A Heeger, M J. Winokur

The nature of the structural ordering within semi-crystalline poly(3-dodecylthiophene) films has been analyzed using a Warren-Averbach line-shape analysis which...

Edge-Chip Testing of Glass at Different Applied Force Angles

October 16, 2008

Author(s)

Janet Quinn, R Mohan V. C.

Current edge-chip material testing procedures involve applying an increasing perpendicular force near a specimen edge until a chip forms. In this report, the...

Control of Overfill Bumps in Damascene Cu Electrodeposition

October 16, 2008

Author(s)

Soo K. Kim, Daniel Wheeler, Daniel Josell, Thomas P. Moffat

Electroanalytical measurements and feature filling experiments have been conducted to study the effect of dodecyltrimethylammonium chloride (DTAC) and branched...

Automation of an Ultrasonic Technique for Nondestructively Monitoring Changes in Properties for Films and Coatings

October 16, 2008

Author(s)

Donald L. Hunston

Nondesctructively monitoring the mechanical properties of films, coatings, or layered materials (paints, adhesives, laminates, etc.) is a difficult challenge...

Global Convergence on a Single Lead-Free Solder Alloy: Transitioning to Pb-Free Assemblies

October 16, 2008

Author(s)

C A. Handwerker

This article discusses the dominant Pb-free alloy system used worldwide and its assembly behavior when Pb-free and Sn-Pb alloys and processes are mixed and the...

Processing Phase Diagram of Melt-Dispersed Carbon-Nanotubes

October 16, 2008

Author(s)

Erik K. Hobbie, Jan Obrzut, H Wang, E A. Grulke, D J. Fry

We measure the processing 'phase diagram' of a model carbon-nanotube polymer melt composite in the parameter space of concentration, shear stress, and...

Thermomechanical fatigue testing of thin metal films

October 16, 2008

Author(s)

Reiner Monig, R R. Keller, Cynthia A. Volkert

An experimental method is described for performing thermomechanical fatigue testing of thin films and interconnects on substrates. The method used alternating...

Instrumented Microindentation of Nanoporous Alumina Films

October 16, 2008

Author(s)

Dudley Finch

Limits on Toughening in Structural Adhesives

October 16, 2008

Author(s)

Donald L. Hunston, H Jianmei, R Raghavan, D Hoffman

The addition of a toughener to a thermoset resin, usually an epoxy, can increase the fracture energy by an order of magnitude or more. These materials are two...

Morphological Transitions of Elastic Domain Structures in Constrained Layers

October 16, 2008

Author(s)

Julia Slutsker, Andrei Artemev, Alexander L. Roytburd

The phase transformation in a constrained layer is a subject of this paper. The formation and evolution of polydomain microstructure under external stress in...

Deformation of Metals

October 16, 2008

Author(s)

R M. Thomson, Lyle E. Levine, Y Shim

Plastic deformation of a metal is possible because of the production and motion of large numbers of dislocations. Dislocations are one dimensional flexible...

Shear Induced Tilt Order in Polymer Blends

October 16, 2008

Author(s)

Erik K. Hobbie, Haonan Wang, H Jeon, H W. Kim, D Stout, Charles C. Han

Optical studies of viscoelastic emulsions under simple shear flow reveal long-range spatial correlation in the orientation of the deformed domains. As the...

Distribution of Grain Boundaries in SrTiO₃ as a Function of Five Macroscopic Parameters

October 16, 2008

Author(s)

D M. Saylor, B S. El-Dasher, T Sano, G S. Rohrer

Measurements of the grain boundary population as a function of misorientation and boundary plane orientation show that the distribution is inversely correlated...

Fracture Modes in Brittle Coatings With Large Interlayer Modulus Mismatch

October 16, 2008

Author(s)

Herzl Chai, Brian R. Lawn, S Wuttiphan

Fracture modes in a model glass/polymer coating/substrate system indented with hard spheres are investigated. The large modulus mismatch between the glass and...

Mechanisms of Deformation of Silicon Nitride and Silicon Carbide at High Temperatures

October 16, 2008

Author(s)

Sheldon M. Wiederhorn, B Hockey, J French

This paper compares the relative merits of liquid-phase sintered Β-Si 3N 4 with sintered α-SiC for high-temperature applications. These materials represent two...

Statistics in Small-Angle Scattering Using Area Detectors

October 16, 2008

Author(s)

J D. Barnes, T J. Prosa

This paper presents straightforward procedures that can be used to assess the statistical significance of small-angle scattering data obtained using area...

Coupling of the Polymer Threading a Membrane Transition to the Membrane Adsorption Transition

October 16, 2008

Author(s)

Edmund A. DiMarzio, Kathleen M. Flynn

A polymer molecule threading through a pore in a plane membrane is allowed to adsorb on either or both sides of the membrane. Further, it is confined to the...

Termination Methods for Ab Initio Simulations of Metallic Clusters for Hybrid Modeling

October 16, 2008

Author(s)

Francesca Tavazza, Anne M. Chaka, Lyle E. Levine

Hybrid simulations are widely used in material science to investigate phenomena that require both a large system size and a high level of accuracy in critical...

Interconnect Failure Due to Cyclic Loading

October 16, 2008

Author(s)

R R. Keller, Reiner Monig, Cynthia A. Volkert, E Arzt, R Schwaiger, O Kraft

The damage generated by AC currents at 100 Hz in interconnects has been studied andcompared with mechanical fatigue damage in thin films. The nature of the...

Characterization of Dendritically Branched Polymers by SANS, SAXS, and TEM

October 16, 2008

Author(s)

Barry J. Bauer, Eric J. Amis

Small angle neutron scattering (SANS), small angle x-ray scattering (SAXS), and transmission electron microscopy (TEM) have been used to characterize the size...

Nanoscale Characterization of Coatings Surface Degradation With Tapping Mode Atomic Force Microscopy

October 16, 2008

Author(s)

Tinh Nguyen, Xiaohong Gu, Mark R. VanLandingham, R Ryntz, D Nguyen, Jonathan W. Martin

Surface characteristics of a polymer coating, such as gloss, and their changes with weathering depend strongly on surface topography and morphology. Therefore...

Dendritic Crystallization in Thin Films of PEO/PMMA Blends: A Comparison to Crystallization of Small Molecule Liquids

October 16, 2008

Author(s)

Brian C. Okerberg, H Marand, Jack F. Douglas

Dendritic crystallization of PEO/PMMA thin films is reported. The film thickness is kept constant while the PMMA molar mass and blend composition are varied...

Stresses at Grain Boundaries During Chemical Diffusion: Thermodynamics and Kinetics

October 16, 2008

Author(s)

C A. Handwerker, J Blendell, P W. Voorhees

We have examined how the stress fields produced by interdiffusion in a binary solid-state diffusion couple change the thermodynamic boundary conditions and the...

The Influence of Composition and Field Annealing on Magnetic Properties of FeCo-Base Amorphous and Nanocomposite Alloys

October 16, 2008

Author(s)

Freemon Johnson, C Y. Um, M E. McHenry, H Garmestani

We report the influence of composition and very high transverse field annealing on the magnetic properties and structure of four FeCo-based amorphous and...

3D Cellular Morphometrics With Multi-Scale Topographical Constraint

October 16, 2008

Author(s)

A Sehgal, Alamgir Karim, Eric J. Amis

The three dimensional cytoplasmic spread of osteoblast like MC3T3-E1 cells with substrate topography was investigated by atomic force microscopy (AFM). The...

Mechanisms of Ceramic Whisker Reinforcement of Dental Composite Resins and Effect of Filler Level

October 16, 2008

Author(s)

Hockin D. Xu

Currently available composite resins are susceptible to fracture and hence are not recommended for large stress-bearing posterior applications involving cusps...

Polymer-Surface Interactions in Nanfilled Polymers

October 16, 2008

Author(s)

Alamgir Karim, Jack F. Douglas, A Nakatani, Eric J. Amis, D B. Majumdar

We review recent investigations of conventional and nanoparticle filled polymers using atomic force and optical microscopy, scattering (x-ray, neutron and...

Experimental Characterization of the Plastic Deformation Behavior of AA5754-0 Sheet Metal

October 16, 2008

Author(s)

Mark Iadicola, Stephen W. Banovic, Timothy J. Foecke

Numerical simulation of plastic deformation in sheet metals can give insight to potential problems and solutions in metal forming operations. However...

Was this page helpful?