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Journals

Prediction of Uniaxial Extension, Pure Shear and Equibiaxial Responses in Constant Deformation Rate Experiments from Single Step Stress Relaxation Experiments in Uniaxial Extension

October 16, 2008

Author(s)

J M. Niemiec, G B. McKenna, J Sweeney, I M. Ward

In working with non-linear constitutive descriptions for polymer melts, it is often forgotten how difficult it is to obtain the experimental data that are...

Nature Materials News and Views on T. Haxhimali et al

October 16, 2008

Author(s)

James A. Warren

Simulations of dendritic solidification by T. Haxhimali et al. [1] for a pure material and comparisons with experiments in an A1Zn alloy system have shown that...

Slip Bands in Deforming Metals

October 16, 2008

Author(s)

R M. Thomson, Lyle E. Levine, M Savage

It is proposed that a deforming solid is composed of two types of deforming regions: regions of percolating slip (slip bands) and regions of non percolating...

Fabrication Strategies for Magnetic Tunnel Junctions With Magnetoelectric Applications

October 16, 2008

Author(s)

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

In this paper, two lithographic fabrication processes for magnetic tunnel junctions (MTJs) with different mask designs and etching technologies are discussed...

A Statistical Connection Between Dislocations and Mechanical Properties

October 16, 2008

Author(s)

Lyle E. Levine, R M. Thomson

The extreme complexity of the dislocation-based processes that underlie plastic deformation are in marked contrast to the relatively simple behavior observed...

A Novel Low-Cost High-Throughput Probe Card Scanner Analyzer for Characterization of Magnetic Tunnel Junctions

October 16, 2008

Author(s)

Philip Pong, Moshe Schmoueli, E Marcus, William F. Egelhoff Jr.

The advancement of the technology of magnetic tunnel junctions (MTJs) greatly hinges on the optimization of the magnetic materials, fabrication process, and...

Nonlinear Coupling of Surface and Quasitransverse Bulk Modes in Cubic Crystals

October 16, 2008

Author(s)

R E. Kumon, M F. Hamilton

In some propagation directions in crystals, the speed of the surfaceacoustic wave mode may approach that of the lowest speed quasitransverse bulk mode. Under...

Phase Field Modeling of Grain Boundaries Formed by Impingement During Melt Growth

October 16, 2008

Author(s)

James A. Warren, R Kobayashi, W Carter

A model of the impingement during solidification of many particles with differing orientations is discussed. The subsequent evolution of the grain boundaries...

Anomalous Relaxation in Entropic Colloidal Gels

October 16, 2008

Author(s)

Erik K. Hobbie, A D. Stewart

Brownian motion in depletion-force networks is studied with video microscopy in confined nearly hard-sphere mixtures. The particle trajectories show anomalous...

Microstructure and Scheil Modeling of As-Cast Bi-Pb-Sn Alloys that Exhibit Transitional Reactions

October 16, 2008

Author(s)

D J. Lewis, M R. Notis

In order to better understand the solidification paths of transitional reaction, Scheil modeling and metallographic observation were completed for alloys in the...

Dielectric and Thermal Properties of Multi-Layer Polymer Films

October 16, 2008

Author(s)

W Sakai, T Yoshiji, N Tsutsumi, C. K. Chiang

The dielectric and thermal properties of three-layer structured films were studied. The two outer layers were about one microns and the thickness of middle...

Dynamic Hardness of Porous and Nonporous Materials Using a Dropped Ball

October 16, 2008

Author(s)

R B. Clough

A method for measuring the dynamic hardness of materials using a dropped ball is developed and applied to nonporous cold-rolled plain carbon (1018) steel. A new...

The τ-Effective Paradox Revisited: An Extended Analysis of KovacsVolume Recovery Data on Poly (Vinyl Acetate)

October 16, 2008

Author(s)

G B. McKenna, M Vangel, Andrew L. Rukhin, Stefan D. Leigh, B Lotz, C Straupe

In 1964 Kovacs (A.J. Kovacs, Transition vitreuse dans les polymeres amorphes. Etude phenomenologique, Fortschr. Hochpolym.-Forsch., 3, 394-507 (1964)) published...

Stick Slip Contact Mechanics Between Dissimilar Materials

October 16, 2008

Author(s)

P M. McGuiggan

Measurements of the contact diameter as a function of loading between a mica surface and a silica surface (mica/silica) in air are reported. The contact...

Temperature Dependent Magnetization Reversal in (Co/Pt)/Ru Multilayers

October 16, 2008

Author(s)

Joseph E. Davies, O Hellwig, E E. Fullerton, K Liu

Antiferromagnetically coupled (Co/Pt)/Ru multilayers with perpendicular anisotropy have been shown to exhibit both vertically and laterally correlated...

Self Assembly of a Nanoscale 3D Conductive Network Within an Amorphous Polymer

October 16, 2008

Author(s)

Lyle E. Levine, Gabrielle G. Long, R A. Gerhardt, R Ou, Jan Ilavsky, C A. Parker

The realization of a 3D network of self-assembled conductive nanowires embedded within an insulating matrix is demonstrated. The lengths, three-dimensional...

The Effect of Molybdenum on the Creep Behavior of Orthorhombic Titanium Aluminides

October 16, 2008

Author(s)

D A. Shepherd, V K. Vasudevan

The effect of molybdenum additions on the creep properties of two orthorhombic titanium aluminide materials, Ti-22Al-26Nb and Ti-22Al-24.5Nb-1.5Mo (at.%), has...

In-Situ Visualization of Polymer Blends Processing: Influence of Viscosity Ratio and Surfaces

October 16, 2008

Author(s)

Kalman Migler, Erik K. Hobbie, F Qiao

We study the effects of viscosity ratio, surfaces and shear on droplet morphology in immiscible polymer blends during extrusion. These in-line experiments are...

Interfacial Modification of Silica Surfaces Through -Isocanatopropyl Triethoxy Silane--Amine Coupling Reactions

October 16, 2008

Author(s)

Brandon M. Vogel, Dean DeLongchamp, Christine M. Mahoney, Leah A. Lucas, Daniel A. Fischer, Eric K. Lin

The surface reaction of gamma-isocyanatopropyl triethoxy silane coupling agent and octadecyl amine was investigated water contact goniometry, near edge x-ray...

Observation of Blunting and Jogging Dislocation Emission at Crack Tips in Alkali Halide Single Crystals

October 16, 2008

Author(s)

Timothy J. Foecke, W Gerberich

Bulk observations of crack tip dislocation emission in NaC1 and KC1 have been made in both blunting and jogging orientations. Measurements of the critical...

Wetting and Nowetting near Critical Points in Solids

October 16, 2008

Author(s)

John W. Cahn

A simple phenomenological theory of eleastic effects is used to examine wetting near critical points in the solid state.

Moldable, Resorbable, Composite Bone Grafts Consisting of Calcium Phosphate Cement and Polymeric Microspheres: Mechanical Properties, Degradation Kinetics and Release of Bioactive Molecules

October 16, 2008

Author(s)

Francis W. Wang, C A. Khatri, J F. Hsii, S Hirayama, Shozo Takagi

We have developed new moldable, resorbable, composite bone grafts made of calcium phosphate cement (CPC) and poly(d,l-lactide-co-glycolide) [PLGA] microspheres...

Young Modulus of a thin plate in the through-thickness direction

October 16, 2008

Author(s)

Sudook A. Kim, H M. Ledbetter

We give a new approach to obtain the through-thickness-direction along the Young modulus of a thin orthotropic plate. The method minimizes errors because eight...

Dentin Adhesion and Microleakage of a Two-Paste Resin-Based Calcium Phosphate Cement

October 16, 2008

Author(s)

Sabine H. Dickens, S R. Kelly

A two-paste resin-based Ca-PO4 cement was examined for microleakage and shear bond strength (SBS). For microleakage, dentin cavities (Group A, no acid...

Laser-Pulse Technique for Measuring the Thermal Boundary Resistance of a Dielectric-Semiconductor Interface

October 16, 2008

Author(s)

Erik K. Hobbie, A S. DeReggi

We describe a technique for simultaneously measuring the bulk and interfacial thermal transport coefficients of semiconductor supported dielectric films...

Assessment of Structure Steel From the World Trade Center Towers. Part V: Forensic Photographic Evidence of Tower Collapse Initiation and Progression

October 16, 2008

Author(s)

Timothy J. Foecke, Stephen W. Banovic, Frank W. Gayle

Photographic forensic evidence for the global collapse of the building structures was also developed as part of this investigation. The image library...

Polymeric Liquids and Networks: Structure and Properties by William W. Graessley

October 16, 2008

Author(s)

Jack F. Douglas

Given the constantly evolving nature of polymer science, it is difficult to construct a unified description of its basics concepts and phenomenology. Graessley...

Glass Pocket Evolution in Vitreous Bonded Sapphire

October 16, 2008

Author(s)

Jong S. Lee, M K. Kang, Sheldon M. Wiederhorn, B Hockey, J Blendell

This paper discusses the evolution of glass filled pockets formed by the growth of sapphire through polycrystalline aluminum oxide bonded by anorthite glass...

Report From NIST to The Medical Devices Standards Board, July 15, 2004

October 16, 2008

Author(s)

John A. Tesk

Polymers Division Activities of interest to the Medical Devices Standards Board are summarized: The status of ASTM Task Force F04.42.06, Development of...

Realization of Reliable GaN Nanowire Transistors Utilizing Dielectrophoretic Alignment Technique

October 16, 2008

Author(s)

Abhishek Motayed, Maoqi He, Albert Davydov, John Melngailis, S N. Mohammad

We have utilized dielectrophoretic force for assembling long (50 microns-200 microns) GaN nanowires for device fabrication. These catalyst free nanowires were...

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