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Journals

Matrix Clusters, Polymer-Matrix Adducts, and Cation Attachment Mechanisms in the MALDI Analysis of Polystyrene

October 16, 2008

Author(s)

R J. Goldschmidt, William R. Blair, Kathleen M. Flynn, Anthony A. Giuseppetti

In the analysis of polystyrene by matrix-assisted laser desorption/ionization (MALDI), matrix clusters, polymer-matrix adducts, and polystyrene oligomers are...

Surfaces Formed by Subcritical Crack Growth in Silicate Glasses

October 16, 2008

Author(s)

J -. Guin, Sheldon M. Wiederhorn

The topology of surfaces formed by subcritical crack growth was investigated by the method of mapping using atomic force microscopy. The objective of the study...

Moving Beyond Crunch-the-Crown Testing Clinical Failure

October 16, 2008

Author(s)

J R. Kelly

Traditional fracture tests of single unit prostheses are inappropriate, since they do not create failure mechanisms seen clinically. Validated tests are needed...

The Influence of Polymer-Polymer and Polymer-Surface Interactions on the Formation and Swelling of End-Grafted Polymer Layers

October 16, 2008

Author(s)

Jack F. Douglas

Investigations at NIST on the influence of polymer-polymer excluded volume and polymer-surface interactions on the formation and swelling of end-grafted polymer...

Predicting the Location of Low-Angle Boundaries in Single-Crystal Castings

October 16, 2008

Author(s)

R E. Napolitano, Robert J. Schaefer

A set of nickel-based superalloy single-crystal investment castings was produced and evaluated for crystal perfection. Defect structures near the seed emergence...

A Unified Approach to Motion of Grain Boundaries, Relative Tangetial Translation along Grain Boundaries, and Grain Rotation

October 16, 2008

Author(s)

John W. Cahn, J E. Taylor

Four phenomena associated with grain boundary mechanics and motion are unified into a single theoretical formulation: normal motion of a grain boundary...

Thickness Dependence of Magnetic Film Edge Properties in Ni₈₀Fe₂₀ Stripes

October 16, 2008

Author(s)

Robert D. McMichael, C A. Ross, V P. Chuang

Measurements of trapped spinwave edge modes in transversely magnetized stripe arrays of Ni80Fe20 largely confirm pervious theoretical predictions for the...

Fracture of Silicate Glasses: Ductile or Brittle?

October 16, 2008

Author(s)

J -. Guin, Sheldon M. Wiederhorn

Atomic force microscopy is used to investigate the possibility of crack tip cavitation during crack growth in silicate glasses. Matching areas on both surfaces...

Erosion Mechanism of Polyanhydrides Containing Oligomeric Ethylene Glycol

October 16, 2008

Author(s)

Brandon M. Vogel, Maria D. Torres, Surya Mallapragada, Balaji Narasimhan

Polyanhydrides are biodegradable polymers that have proved to be excellent drug carriers. Applications of these polymers to protein-based drug delivery systems...

Small-Angle Scattering for the Industrial Plastics Laboratory - an Overview

October 16, 2008

Author(s)

J D. Barnes

Small-Angle Scattering (SAS) has been an important fundamental research tool for characterizing the microstructure of polymeric materials since the 1940s...

Variation of Thin Film Edge Magnetic Properties With Patterning Process Conditions in Ni₈₀Fe₂₀ Stripes

October 16, 2008

Author(s)

Brian B. Maranville, Robert D. McMichael, D W. Abraham

We report the effect of etch depth on the magnetic properties of thin film edges in patterned arrays of ferromagnetic stripes. We use ferromagnetic resonance...

Crystal Structure of the Layered Perovskite-Like Sr_n(Nb,Ti)_nO_3n+2 Compounds. Part II. TEM Study of the Sr_n(Nb,Ti)_nO_3n+2

October 16, 2008

Author(s)

Igor Levin, Leonid A. Bendersky, Terrell A. Vanderah

Series of Srn(Nb,Ti) nO 3n+2 structures with n=4,4.5,5,6 and 7 were studies by transmission electron microscopy. These structures are composed of inifite two...

Interfacial Free Energies and the Creep of Multilayer Thin Films

October 16, 2008

Author(s)

Daniel Josell, W Carter

Experiments utilizing the creep properties of multilayer thin films to determine underlying free energies are presented with essential theory. A new technique...

The Craze Growth Response in Stress Relaxation Conditions for a Styrene-Acrylonitrile Copolymer During Physical Aging

October 16, 2008

Author(s)

M Delin, G B. McKenna

Craze growth has been studied as a function of time after a quench (physical aging) at four different temperatures between 22 degrees C and 60 degrees C. A...

Clementite's Elastic Constants

October 16, 2008

Author(s)

Sudook A. Kim, H M. Ledbetter

By extrapolation, we estimated cementite's elastic constants. Altogether, we studied seven Fe-C binary alloys varying from 0 to 17.3 atomic percent carbon. Thus...

Synthesis of Permethacrylated Beta-Cyclodextrin for Potential Uses in Dental Resins

October 16, 2008

Author(s)

Rafael L. Bowen

Literature searches to date have not revealed reports of methacrylated cyclodextrins in dental resins. The purpose of this study was to determine the...

Structural Instability in the B2-Type Ordered Alloys: Zr(Ru,Rh) and Zr(Ru,Pd)

October 16, 2008

Author(s)

Richard M. Waterstrat, R Kuentzler

Low temperature properties of B2-type solid solutions have been measured in the quasi-binary systems Zr(Ru,Rh) and Zr (Ru,Pd). A continuous transition from...

Thermodynamic Assessment of the Co-Mo System

October 16, 2008

Author(s)

Albert Davydov, Ursula R. Kattner

The experimental thermochemical and phase diagram data for the Co-Mo system were assessed. A consistent thermodynamic description, using a Redlich-Kister model...

Research on the Mechanisms of Anaerobic Corrosion

October 16, 2008

Author(s)

W Iverson

Investigations of anaerobic corrosion of iron over the past years have led to a number of conclusions regarding the mechanisms. In addition several unusual...

Automated Monitoring of Thin Film Properties via Ultrasonics

October 16, 2008

Author(s)

Donald L. Hunston

Non-destructively monitoring of the properties in a thin film or layered material (coatings, adhesives, etc.) is a difficult challenge, and yet there are many...

Partitioning of Water Between Voids and the Polymer Matrix in a Molding Compound by Proton NMR

October 16, 2008

Author(s)

David L. VanderHart, Michael A. Schen, G T. Davis

A commercial electronic packaging material (EPM), based on a silica-filled cresol-novolac epoxy, was fabricated into a 0.4 mm sheet, using methods mimicking...

Metastability and Depletion Driven Aggregation

October 16, 2008

Author(s)

Erik K. Hobbie

Depletion driven aggregation in binary colloidal mixtures is studied via the time evolution of the cluster-size distribution and structure factor as the...

Dissolution Dynamics of Artificially Structured Materials

October 16, 2008

Author(s)

M Shima, L Salamanca-Riba, Thomas P. Moffat

The anodic dissolution of an ultrathin cobalt film buried beneath a copper overlayer has been studied using voltammetry and chronoamperometry. The films were...

Photoacid Generator Dispersion in Partially Fluorinated Photoresist Polymers and their Blends

October 16, 2008

Author(s)

David L. VanderHart, Vivek Prabhu

Solid state proton NMR methods are used to probe the intimacy of mixing in materials relevant to photoresist applications. Bulk blends, made solvent casting...

Investigation of N₂ Plasma Effects on the Depth Profile of Hydrogen Silsesquioxane Thin Films Using High Resolution Specular X-Ray Reflectivity

October 16, 2008

Author(s)

Hae-Jeong Lee, Eric K. Lin, J K. Lan, Y L. Cheng, H C. Liou, Wen-Li Wu, Y L. Wang, M S. Feng, C G. Chao

Non-destructive, specular X-ray reflectivity (SXR) measurements were used to investigate N2 plasma effects on the density depth profile of hydrogen...

Clustering and Anisotropy due to Step-Edge Segregation in vapor deposited CoPt₃: Calculation and Simulation

October 16, 2008

Author(s)

Brian B. Maranville, M Scherman, F Hellman

An atomistic mechanism is proposed for the creation of structural anisotropy and consequent large perpendicular magnetic anisotropy in vapor deposited films of...

Measuring Hydrogen Deuterium Exchange in Protein Monolayers

October 16, 2008

Author(s)

Jack R. Smith, Marcus T. Cicerone, Curtis Meuse

A non-destructive infrared (IR) spectroscopy assay to measure hydrogen-deuterium exchange (HDX) in surface-adsorbed protein monolayers has been developed. The...

On the Co-Existence and Stability of Trijunctions and Quadrijunctions in a Simple Model

October 16, 2008

Author(s)

John W. Cahn, E S. Vanleck

Junctions of four domain walls (quadrijunctions) are shown to be stable in Ising-type ordering models with weak first and strong second neighbor interactions...

Measurement of Specific Heat Capacity and Electrical Resistivity of Industrial Alloys Using Sub-Second and Super-Second Pulse Heating Techniques

October 16, 2008

Author(s)

D Basak, R A. Overfelt, Dongli Wang

The determination of the specific heat capacity and electrical resistivity of Inconel 718, Ti-6Al-4V, and CF8M stainless steel, from room temperature to near...

Elastic Stiffnesses and Internal Frictions of Monocrystal Quartz

October 16, 2008

Author(s)

H M. Ledbetter, Sudook A. Kim, M Lei

Using acoustic-resonance spectroscopy (with only two point contacts with the specimen), we measured both the real and imaginary parts of the elastic-stiffness...

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