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Materials

Ceramics

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Displaying 751 - 775 of 1323

Thermodynamic Control of Germanium Quantum Dot Growth on Silicon

May 1, 2005
Author(s)
Richard J. Wagner, E Gulari
Strained epitaxial growth of Ge on Si(001) produces self-assembled, nanometer scale islands, or quantum dots. We study this growth by atomistic simulation, computing the energy of island structures to determine when and how islanding occurs. The

Surface Engineering Measurement Standards for Inorganic Materials

April 14, 2005
Author(s)
S J. Dapkunas
The Recommended Practice Guide describes nearly 200 standard measurement methods (standards) used by the surface engineering community. The standards compiled address inorganic (metal and ceramic) materials used in structural applications. The Guide is

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

Boundary Lubricating Film: Formation and Lubrication Mechanism

March 4, 2005
Author(s)
Stephen M. Hsu, Richard S. Gates
Boundary lubricating films are critical in effective lubrication of engine components. Their formation mechanism has not been fully understood because of the large variations of chemistry and machinery in operation. Various reports on boundary lubricating

Boundary Lubrication and Boundary Lubricating Film

March 3, 2005
Author(s)
Stephen M. Hsu, Richard S. Gates
This chapter offers a comprehensive summary of current understanding in boundary lubrication and the formation of boundary lubricating films. Classical and modern definitions of boundary lubrication are presented which serve to define the scope of boundary

Photoreflectance Study of the Electronic Structure of Si-Doped InyGa 1-y As 1-x N x Films With x 0.012

March 1, 2005
Author(s)
Youn S. Kang, Lawrence H. Robins, Anthony Birdwell, Alexander J. Shapiro, W. R. Thurber, Mark D. Vaudin, M M. Fahmi, D Bryson, S N. Mohammad
The electronic structure of Si-doped InyGa1-yAs1-xNx films on GaAs substrates, grown by nitrogen-plasma-assisted MBE, was examined by photoreflectance (PR) spectroscopy at temperatures between20 K and 300 K. The measured critical-point energies were

Generation of Lattice Wannier Functions via Maximum Localization

January 20, 2005
Author(s)
Eric J. Cockayne
A method is presented for generating approximate lattice Wannier functions (LWF) for lattice dynamics problems, using the dynamical matrix for a supercell as input. The lattice Wannier functions fit selected phonon frequencies and eigenvectors exactly, are

Investigation of the Charge Compensation Mechanism on the Electrochemically Li-Ion Deintercalated Li 1-x Co 1/3 Ni 1/ 3MN 1/3 O 2 Electrode System by Combination of Soft and Hard X-Ray Absorption Spectroscopy

January 11, 2005
Author(s)
W S. Yoon, Kyung Y. Chung, Xiao-Qing Yang, James McBreen, Mahalingam Balasubramanian, C P. Grey, Daniel A. Fischer
In situ hard X-ray absorption spectroscopy (XAS) at metal K-edges and soft XAS at O K-edge and metal L-edges have been carried out during the first charging process for the layered Li1-2Co1/3Ni1/3Mn1/3O2 cathode material. The metal K-edge XANES results

McMurdie

December 3, 2004
Author(s)
Alan D. Mighell, Gasper J. Piermarini, Winnie K. Wong-Ng
Howard F. McMurdie - known as Mac to his friends oa colleagues--was an exemplar of good living. Blessed with excellent health, a loving family, and many close colleagues, Mac was active and productive to the very end. It is therefore with the deepest

Array Ordering in Dendritic Crystals and the Influence on Crystal Perfection

December 1, 2004
Author(s)
R E. Napolitano, David R. Black
In the work reported here, several important issues regarding the role of the evolving dendritic structure in the generation of crystal defects are investigated. Industrially produced single-crystal castings are examined, and the dendritic arrays are
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