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Materials

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Displaying 2176 - 2200 of 2347

Characterizing reliability of multilayer PZT actuators

February 26, 2006
Author(s)
Stephanie A. Hooker
Many new applications are emerging for piezoelectric ceramics including adaptive structures, active-flow-control devices, and vibration and noise suppression systems. Additionally, there are opportunities to use these devices in the biomedical field for

Comparison of the Fouling Release Properties of Hydrophobic Fluorinated and Hydrophilic PEGylated Block Copolymer Surfaces

January 19, 2006
Author(s)
S Krishman, N Wang, Christopher K. Ober, J Finlay, M E. Callow, J A. Callow, A Hexemer, K E. Sohn, E J. Kramer, Daniel A. Fischer
To understand the role of surface-wettability on adhesion of cells, the attachment of two different marine algae was studied on hydrophobic and hydrophilic polymer surfaces. Adhesion of cells of the diatom Navicula and sporelings (young plants) of the

Kramers-Kronig analysis of attenuation and dispersion in trabecular bonea

December 1, 2005
Author(s)
Kendall Waters, B K. Hoffmeister
A restricted-bandwidth form of the Kramers-Kronig dispersion relations is applied to in vitro measurements of ultrasonic attenuation and dispersion properties of trabecular bone specimens from bovine tibia. The Kramers-Kronig analysis utilizes only

Zeroing in on a Lead-Free Solder Database

October 1, 2005
Author(s)
Thomas A. Siewert, David R. Smith
The rising interest in lead-free solders creates a need for complete property data on the various lead-free solder compositions. Circuit designers need these data to assess the impact of the transition on product life, and production engineers need these

Multilayer and functional coatings on carbon nanotubes using atomic layer deposition

September 14, 2005
Author(s)
Cari F. Herrmann, F Fabreguette, Dudley Finch, Roy H. Geiss, S M. George
Atomic layer deposition can be used to deposit ultra thin and conformal films on substrates with very high aspect ratios such as nanotubes and nanowires. In this paper, we demonstrate that functionalized and multilayered ALD coatings can be deposited

Relative Permittivity and Loss Tangent Measurement Using the NIST 60 mm Cylindrical Cavity

August 31, 2005
Author(s)
Michael D. Janezic, Jolene D. Splett, Kevin J. Coakley, Raian K. Kaiser, John H. Grosvenor Jr
In order to develop a dielectric Standard Reference Material (SRM), a measurement system for measuring the relative permittivity and loss tangent of dielectric materials is presented. To achieve the necessary level of measurement accuracy, we selected the

Analyzing Microstructure by Rietveld Refinement

June 1, 2005
Author(s)
Davor Balzar, N C. Popa
Rietveld refinement has a primary purpose of refining crystal structure. However, this powerful technique is being increasingly used for obtaining microstructural information, such as texture, crystallite size, strain and stress, and crystalline defect

Site Specific X-Ray Photoelectron Spectroscopy Using X-Ray Standing Waves

May 26, 2005
Author(s)
Joseph C. Woicik
The x-ray standing wave technique is an experimental method that can accurately determine the precise crystallographic positions of atoms within a crystalline unit cell. As we have seen in preceding chapters of this book, this unique ability arises from

Third Japan-US Workshop on Combinatorial Material Science and Technology

May 16, 2005
Author(s)
Winnie K. Wong-Ng
The Third Japan-US workshop on Combinatorial Material Science and Technology took place at the Loisir Hotel in Naha City on the historical island, Okinawa, Japan, from December 7 to December 10, 2004. This workshop was the third of a series of Japan-US

Improvement in the Low Energy Collection Efficiency of Si(Li) X-Ray Detectors

April 7, 2005
Author(s)
C E. Cox, Daniel A. Fischer, W G. Schwarz, Y Song
Soft X-ray beam-line applications are of fundamental importance to material research, and commonly employ high-resolution Si(Li) detectors for Energy Dispersive Spectroscopy. However, the measurement of X-rays below 1 keV compromised by absorption in the

LEAD-FREE SOLDER DATA: COLLECTION AND DEVELOPMENT

January 10, 2005
Author(s)
Thomas A. Siewert, David R. Smith, Yi-Wen Cheng, Juan C. Madeni, S X. Liu
The rising interest in lead-free solders creates a need for complete property data on the various lead-free solder compositions. Various types of data are available, but are widely dispersed through the literature. To improve the sharing of this important

A Coupled Arc and Droplet Model of GMAW

January 8, 2005
Author(s)
Timothy P. Quinn, M Szanto, T Gilad, I Shai
A model of gas metal arc welding was developed that solves the magneto-hydrodynamic equations for the flow and temperature fields of the molten electrode and the plasma simultaneously, to form a fully coupled model. A commercial finite element code was
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