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Journals

Crystal Chemistry and Microwave Dielectric Properties of Ba₃Mnb_2-xSb_xO₉(M=Mg, NI, Zn)

February 19, 2017

Author(s)

M W. Lufaso, E Hopkins, S M. Bell, A Llobet

The effect of Sb5+ substitution on the crystal chemistry and dielectric properties of Ba3MNb2-xSbxO9 (M = Mg, Zn, Ni) was investigated using a combination of X...

Enhancement of Mercuric Iodide for High Energy Radiation Detectors via Diffraction Imaging

February 19, 2017

Author(s)

B W. Steiner, P L'Hostis, U Laor, L van den Berg

NASA=S interest in tracing the structural origins of the superior electronic performance of mercuric iodide crystals grown in microgravity has led to an...

Crystallography and Crystal Chemistry of (Ba_1-xSr_x)2TiO₄

February 19, 2017

Author(s)

Winnie Wong-Ng, James A. Kaduk, Debra L. Kaiser, Julia Frank

This paper reports an investigation of the homogeneity range, crystal chemistry and crystallography of a technologically-important (Ba2-xSrx)TiO4 solid solution...

Modeling of Nematic Liquid Crystal Alignment on Patterned Substrates

February 19, 2017

Author(s)

Hemang J. Shah, A K. Fontecchio, Robin L. Selinger, Lin-Sien H. Lum

Effect of Abrasive Wear on Interfacial Shear Sliding Resistance in SiC Fiber-Reinforced Al₂0₃

February 19, 2017

Author(s)

Kakisawa, Y Kagawa, Lin-Sien H. Lum

Interface wear behavior and its effects on the shear frictional sliding resistance in fiber-reinforced ceramics have been studied using SiC fiber (SCS-6)...

Subsolidus Phase Relationships of the BaO-R₂O₃-CuO_z (R=Tm and Yb) Systems Under Carbonate-Free Conditions at p_o2 = 100 Pa, and T = 750 Degree Celcius and 810 Degree Celcius

February 19, 2017

Author(s)

Winnie Wong-Ng, Zhi Yang, Lawrence P. Cook

For applications of phase equilibria to coated conductor processing, phase diagrams constructed under carbonate-free conditions should be employed. Using...

Multiscale Roughness and Stability of Superhydrophobic Biomimetic Interfaces

February 19, 2017

Author(s)

Michael Nosonovsky

Stability of a composite interface (CI) of roughness-induced superhydrophobic surfaces is studied. In order to have high contact angle and low contact angle...

Workshop on Purity and Dispersion Measurement Issues of Single Wall Carbon Nanotubes (SWCNTs)

February 19, 2017

Author(s)

Stephen W. Freiman, Richard R. Cavanagh, C K. Montgomery, Thomas J. Shaffner, S Arepalli, B Files, P Nikolaev

This document is an executive summary of a workshop organized jointly by the National Aeronautics and Space Administration, Lyndon B. Johnson Space Center (NASA...

Negative Pressure in Water Capillary Bridges at Nanocontacts

February 19, 2017

Author(s)

Seung H. Yang, Michael Nosonovsky, Huan Zhang, Koo-Hyun Chung

Negative Laplace pressure may develop inside a water capillary bridge formed between two bodies and contribute to the force required to pull them apart. Because...

Tensile Creep of a Commercial-Grade Silicon Nitride, AS800: Limitation of Norton's Relationship

February 19, 2017

Author(s)

H A. Maupas, B Hockey, Sheldon M. Wiederhorn

Creep experiments were conducted on a commercial grade of silicon nitride (AS800) over a wide range of temperatures and stresses: 1200oC to 1370oC; 50 MPa to...

Comparison of Tensile Creep Measurements on Buttonhead and Pin-Loaded Specimens of Some Silicon Nitride Ceramics

February 19, 2017

Author(s)

Ralph Krause

Tensile-creep measurements by two experimental techniques on two kinds of silicon nitride ceramics were compared statistically. Some of the measurements were...

Optical and Structural Studies of Strain-Relaxed InxGa1-xN Films on GaN/sapphire with 0.04

February 19, 2017

Author(s)

Larry Robins, J T. Armstrong, Mark D. Vaudin, Charles E. Bouldin, Joseph Woicik, Albert J. Paul, W. R. Thurber, Ryna B. Marinenko

The structures of a set of InxGa1-xN films grown by atmospheric-pressure MOCVD onGaN buffer layers on c-plane sapphire, with compositions in the range 0.04 x ...

Simulation of PNR-PNR Correlations in Pb(Sc_1/2Nb_1/2)O₃; Support/Implications for the Spherical Random Bond Random Field Model

February 19, 2017

Author(s)

Benjamin P. Burton, Eric J. Cockayne, U Waghmare

First principles based molecular dynamics simulations were performed on a 40^3^ unit cell system of stoichiometry Pb(Sc 1/2Nb 1/2)O 3 (PSN). To imitate a...

Green Body Density Measurement Techniques

February 19, 2017

Author(s)

P Pei, J Anderson, M C. Bhardwaj, Dennis B. Minor, T Thornton

Green body density measurement techniques were investigated and compared. The measurement techniques investigated include mass-volume measurement, mercury...

Hierarchical Roughness Makes Superhydrophobic States Stable

February 19, 2017

Author(s)

Michael Nosonovsky, Bharat Bhushan

Roughness enhances hydrophobicity of a solid surface leading to high contact angles with water. To achieve low contact angle hysteresis along with a high...

Analytical Model for Residual Stresses in Polymeric Containers During Cryogenic Storage of Hematopoietic Stem Cells

February 19, 2017

Author(s)

D M. Saylor, Martin McDermott, Lin-Sien H. Lum

Hematopoietic stem cell (HSC) therapy can significantly lower instances of infection in chemotherapy patients by accelerating the recovery of white blood cells...

Enviromental Concerns Facing the Ceramics Industry

February 19, 2017

Author(s)

Stephen W. Freiman

Over the past few years, there has been increased attention paid by ceramic manufacturers in the United States to environmental issues facing their businesses...

ACerS-NIST Phase Equilibria Diagrams Volume XIV Oxides

February 19, 2017

Author(s)

Robert S. Roth, Terrell A. Vanderah

This volume is the fourteenth of the topically-oriented series of phase diagram compilations and the tenth to appear since the National Institute of Standards...

The 102nd Annual Meeting of the American Ceramic Society

February 19, 2017

Author(s)

Winnie Wong-Ng

Gateway to the New Millennium was the theme of the 102nd annual meeting of the American Ceramic Society which took place in St. Louis, Missouri from April 29 to...

Application of Aqueous Proton T2-Weighted NMR Imaging in Material Characterization

February 19, 2017

Author(s)

P S. Wang

Proton spin-spin relaxation times (T2) of water molecules in various physical states were measured by nuclear spin-echo sequence. Different pulse sequences for...

Dielectric and Structural Studies of Ba₂ReNb₃Ti₂O₁₅ (BReNTO₁₅,Re=Bi³⁺,La³⁺,Nd³⁺,Sm³⁺,Gd³⁺) Tetragonal Tungsten Bronze Structured Ceramics

February 19, 2017

Author(s)

Igor Levin, M Stennett, I Reaney, G Miles, D I. Woodward, C Kirk, A R. West

The structure and dielectric properties of a new family of tetragonal tungsten bronze structured ceramics with the general formula, Ba 2ReNb 3Ti 2O 15 (BReNTO...

Proceedings of NEW: Update 2001, National Educators Workshop, NIST, October 16-18, 2001

February 19, 2017

Author(s)

S Jahanmir, J Jacobs

This report contains the introduction to the proceedings of the 2001 National Educators Workshop, planned for October 16-18, 2001 at NIST. More than one hundred...

Vapor Pressure and Thermal Stability of MgB₂ at 0.1 mPa Total Pressure

February 19, 2017

Author(s)

Lawrence P. Cook, R Klein, Winnie Wong-Ng

The vapor pressure of Mg(g) over MgB 2(cr) for the reaction 2 MgB 2(cr) Mg(g)+MgB 4(cr) has been measured thermogravimetrically from 900 degrees celsius to 1100...

Proton Spin-Spin Relaxation of Water Molecules in a Gel Binder and Ceramic Blend

February 19, 2017

Author(s)

P S. Wang

Water molecules interactions in a agarose gel used as a ceramic binder and ceramic blends were studied by proton spin-spin relaxation. Nuclear spin echo signals...

Preface for Proceedings of the 'Perovskite Oxides for Electronic, Energy Conversion, and Energy Efficiency Applications' Session of the ACS 101st Annual Meeting

February 19, 2017

Author(s)

Winnie Wong-Ng, T G. Holesinger, G N. Riley, R Guo

This manuscript is the preface for the proceedings of the focused session 'Perovskite Oxides for Electronic, Energy Conversion, and Energy Efficiency...

A Report on the 1999 American Crystallographic Association (ACA) Annual Meeting

February 19, 2017

Author(s)

Winnie Wong-Ng

The 1999 ACA Annual meeting took place at the Buffalo convention center, New York, from May 22 to 27. This meeting was held in conjucntion with the American...

Effect of Elastic Interactions on Self-Assembling of Multiferroic Nanostructures in Epitaxial Films

February 19, 2017

Author(s)

Julia Slutsker, Igor Levin, Jiying Li, Andrei Artemev, Alexander L. Roytburd

The theoretical and experimental studies of self-assembled multiferroic nanostructures in epitaxial films were combined to reveal the dominant role of elastic...

A Re-Examination of a Specific Surface Area Research Material

February 19, 2017

Author(s)

Dennis B. Minor

Specific surface area(SSA) analysis is one of the most common, quick, and inexpensive techniques used in analytical laboratories to characterize a variety of...

Measuring the Five Parameter Grain Boundary Distribution From Observations of Planar Sections

February 19, 2017

Author(s)

D M. Saylor, B S. El-Dasher, B L. Adams, G S. Rohrer

A stereological method is described for estimating the distribution of grain boundary types in polycrystalline materials over the five macroscopically...

Contact Area Correction for Random Surface Roughness on Nanoadhesion

February 19, 2017

Author(s)

Seung H. Yang, Huan Zhang, Stephen M. Hsu

Atomic force microscopes (AFM) have been used to measure adhesion at nanoscale between two surfaces. Colloidal probes are often utilized for such measurements...

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