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NIST Authors in Bold

Displaying 1476 - 1500 of 1730

Preparation and Characterization of Photopatternable BaTiO 3 / Polymer Composites

January 1, 2001
Author(s)
R Popielarz, C. K. Chiang, R Nozaki, Jan Obrzut
The dielectric properties of acrylic resin composites filled with BaTiO 3 have been evaluated in the broad frequency range. These materials were used as models to study the dielectric response in polymer composite films for de-coupling capacitance

Restabilization of Electrosterically Stabilized Colloids in High Salt Media

January 1, 2001
Author(s)
V S. Stenkamp, P M. McGuiggan, J C. Berg
For electrostatically stabilized colloids, an increase in salt concentration typically causes a decrease in stability, until the electrical double layer is collapsed, in which case the instability remains as salt concentration is increased further. In

Scaling Issues in the Measurement of Monolayer Films

January 1, 2001
Author(s)
Stephen M. Hsu, P M. McGuiggan, J Zhang, Y L. Wang, F Yin, Y P. Yeh, Richard S. Gates
An atomic force microscope (AFM), a surface forces apparatus (SFA), and a ball-on-inclined plane (BOIP) apparatus were used to measure the mechanical properties of thin films. The frictional force (lateral resistance) of a set of four samples with

Small-Angle Neutron Scattering From Metal Ion-Containing PAMAMOS Dendrimer Networks

January 1, 2001
Author(s)
Robert A. Bubeck, Barry J. Bauer, P Dvornic, M J. Owen, S Reeves, P Parkham, L W. Hoffman
There is considerable interest in the development of nanocomposites based on dendrimers as host matrices. The intent is to take advantage of functionalized dendrimer interiors that can complex with an added constituent, resulting in nanocomposites for

Standards for Reliability Testing of Heavy Vehicle Propulsion Materials

January 1, 2001
Author(s)
S Jahanmir, James F. Kelly, William E. Luecke
The objective of this project is to develop international standard test methods for assessing the reliability of ceramic components used in diesel engines and other heavy vehicle propulsion systems. Advanced ceramics such as silicon nitride offer a unique

Temperature Monitoring of Capillary Rheometry Using a Fluorescence Technique

January 1, 2001
Author(s)
Anthony J. Bur, S C. Roth, H Lobo
A non-contact temperature monitoring technique based on fluorescence spectroscopy was used to measure the temperature of a polymer resin during capillary rheometry testing. Polyethylene doped with a fluorescent dye, perylene, was used in experiments that

Tensile Creep in the Next Generation Silicon Nitride

January 1, 2001
Author(s)
F Lofaj, Sheldon M. Wiederhorn, Gabrielle G. Long, P R. Jemian
The tensile creep behavior of a Lu-containing silicon nitride (SN 281) was characterized in the temperature range of 1350oC to 1550oC for test periods up to 10000h. For the same test conditions, the minimum strain rates were several orders of magnitude

The Boundary Lubrication Properties of Model Esters

January 1, 2001
Author(s)
P M. McGuiggan
The friction of three chemically distinct esters was measured in order to determine how molecular architecture influences friction. The friction coefficients of mica surfaces separated by a thin film (

Using Self-Assembled Monolayer Technology to Probe the Fiber-Matrix Interface

January 1, 2001
Author(s)
Gale A. Holmes, E Feresenbet, D T. Raghavan
hesion at the fiber matrix interface of composite specimens is often ascribed to the following factors (Sharpe and Drzal): (1) mechanical interlocking, (2) physicochemical interactions, (3) chemical bonding, and (4) mechanical deformation of the fiber

Crystal Structure of the Monoclinic Perovskite Sr 3.94Ca d1.31^Bi 2.70 O 12

December 1, 2000
Author(s)
Winnie K. Wong-Ng, James A. Kaduk, Qingzhen Huang, Robert S. Roth
The crystal structure of the low temperature oxidized form of Sr 3.94Ca 1.31Bi 2.70O 12 has been determined using a combined Rietveld refinement technique with neutron, synchrotron, and powder x-ray diffraction data. The structure is pseudo-orthorhombic

Editor's Preface

December 1, 2000
Author(s)
Kalman D. Migler, S G. Hatzikiriakos
The work of J.R. Rice has been central to developments in solid mechanics over the last thirty years. This volume collects 21 articles on deformation and fracture in honor of J.R. Rice on the occasion of his 60th birthday. Contributors include students (P

NIST Centennial Celebration - Crystallographic Highlights

December 1, 2000
Author(s)
Winnie K. Wong-Ng, Alan D. Mighell, Gabrielle G. Long, Leonid A. Bendersky, Vicky L. Karen, J D. Barnes, G L. Gilliland, T Gallagher, Terrell A. Vanderah, R G. Munro, Paul E. Stutzman, H F. McMurdie, S Block, Gasper J. Piermarini, Robert S. Roth, Antonio Santoro, Curt W. Reimann, C R. Hubbard, John W. Cahn, E Prince, D R. Lide, H Ondik, Lawrence P. Cook, T Siegrist, G DeTitta, L Finger, H Evans, E Gabe, G Enright, J T. Armstrong, M Levenson, Laurence C. Chow, Shozo Takagi, M Mathew, Jeffrey W. Lynn, H S. Peiser
NIST has a long history of crystallographic research, and has made significant contributions to the advancement of the fields of crystallography, biology, and materials science. The articles are contributed by scientists from various divisions at NIST, and

NIST Centennial Celebration Symposium Highlight

November 15, 2000
Author(s)
Alan D. Mighell, Winnie K. Wong-Ng
The Centennial Celebration of the National Institute of Standards and Technology (NIST), formerly known as the Bureau of Standards (NBS), takes place in the year 2001. NIST has a long history (>50 years) of crystallographic research, and has made

X-Ray Anomalous Scattering Study of a Charge-Ordered State in NaV 2 O 3

November 13, 2000
Author(s)
Shin-ichi Nakao, K Ohwada, N Takesue, Y Fujiii, M Isobe, Y Ueda, M V. Zimmermann, J P. Hill, D Gibbs, Joseph Woicik, L Koyama, Y Murakami
Charge ordering of V 4+ and V 5+ in NaV 2O 5 has been studied by an X-ray diffraction technique using anomalous scattering near a vanadium K-aborption edge to critically enhance a contrast between the two ions. A dramatic energy dependence of the

Combined 63,65 Cu NQR and NMR Study of Y 1-x Ca x Ba 2 Cu 3 O y

November 1, 2000
Author(s)
D M. Potrepka, J. I. Budnick, A R. Moodenbaugh, Daniel A. Fischer, W A. Hines
Zero-field 63,65Cu nuclear quadrupole resonance (NQR) and nuclear magnetic resonance (NMR) spectra were obtained at 1.3 K for powdered samples of Y 1-xCa xBa 2Cu 3O y with 0 less than or equal to} x less than or equal to} 0.20. The results for the
Displaying 1476 - 1500 of 1730
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