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Displaying 151 - 175 of 1316

Applications of Ceramics for Healthcare: The Future Has Begun

February 19, 2017
Author(s)
Grady S. White
Dramatic improvements in our understanding of how biological systems work, diseases initiate, and illnesses progress have given rise to the expectation that many of these ailments can be cured, perhaps even in their precursor states, as new tools are

Assessment of Powder Characterization Methods for Advanced Ceramics

February 19, 2017
Author(s)
Lin-Sien H. Lum
This report summarizes the results of an international round robin study on advanced ceramic powders. Thirty-four laboratories from Belgium, Germany, Japan, Sweden and the U.S. representing industrial, academic and government research organizations

Boundary Lubricated Friction Experiments With Coarse Surface Texture

February 19, 2017
Author(s)
Jorn Larsen-Basse, L K. Ives, Stephen M. Hsu
Low-speed friction experiments were conducted under boundary lubrication in a pin-on-disk tester. The 304 stainless steel disk had smooth areas alternating with areas of coarse surface texture consisting of indents or macroscopic grooves, 0.3-0.4 mm in

CD ROM Guide for NIST Crystal Data NIST Standard Reference Database 3

February 19, 2017
Author(s)
Vicky L. Karen, S L. Young, Alan D. Mighell
The NIST Crystallographic Data Center collects, evaluates and disseminates data on solid-state materials. NIST Crystal Data is a comprehensive database with chemical, physical and crystallographic information on all classes of well-characterized substances

Characterization of the Mirror Region With Atomic Force Microscopy

February 19, 2017
Author(s)
Sheldon M. Wiederhorn, Jose Lopez-Cepero, Jay S. Wallace, Jean-Pierre Guin, Theo Fett
In this paper we use atomic force microscopy to investigate the roughness of the mirror region in silica glass. We demonstrate a decrease in surface RMS Roughness from about 0.5 nm to about 0.4 nm with increasing stress intensity factor (0.5KIc to about 0

Combinatorial Tools for Inorganic Thin Films

February 19, 2017
Author(s)
Peter K. Schenck, Debra L. Kaiser
We report the deveopment of a novel dual beam - dual target pulsed laser deposition (PLD) system for the production of compositionally-graded library films for combinatorial thin film materials research. In-situ process monitoring, including high-speed

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 because they provide much lower contact pressures and controlled contact geometry, facilitating

Contact Damage Produced in Si and MgO by Nanoindentation

February 19, 2017
Author(s)
B Hockey
TEM has been used to characterize the defect structures produced in Si and Mgo by Berkovich indentation at loads ranging from 0.1 mN to 5 mN. Plane-section observations are used to describe the nature of the defects and their spatial distribution about the

Controlled Synthesis of Single-Crystalline InN Nanorods

February 19, 2017
Author(s)
Igor Levin, Albert Davydov, O M. Kryliouk, Hyun Jong Park, YongSun Won, T J. Anderson, J P. Kim, J A. Freitas
Single-crystalline InN nanorods were successfully grown on c-Al203, GaN, and Si substrates by non catalytic, template-free hydride metal-organic vapor phase epitaxy (H-MOVPE). Stable gas-phase oligomer formation is proposed as the nucleation mechanism for

Crystallographic Data Sources

February 19, 2017
Author(s)
Vicky L. Karen
Crystallography has a long and successful history of self-organization and was one of the first areas to create numerical scientific databases. Virtually all structure determinations have been archived in databases that allow ready access and complete

Crystallography and Crystal Chemistry of (Ba 1-x Sr x )2TiO 4

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 series. Since the end members of the series - Ba2TiO4 (Pnma (No.62)) and Sr2TiO4 (I4/mmm (No

Data and Informatics Needs in Biomaterials

February 19, 2017
Author(s)
C P. Sturrock
Biomaterials are nonviable materials used in medical devices, that are intended to interact with biological systems. In 2002 the total U.S. Medical device market stood at $77 billion, with global sales estimated at 2-3 times this figure. Approximately 40

Defect Structures Produced in Silicon and MgO by Nanoindentation

February 19, 2017
Author(s)
B Hockey
TEM has been used to characterize residual defect structures produced in 111} Si and 001] MgO by Berkovich nanoindentation at loads ranging from 5 mN to 0.1 mN. The plane-section observations provide a description of the primary defects, found to be

Determining Crystal Habits From Oberservations of Planar Sections

February 19, 2017
Author(s)
D M. Saylor, G S. Rohrer
A Method is described for reconstructing the crystal habit from the observations of many random planar sections of known orientation. We have generated simulated observations based on five different assumed crystal habits and found that it is possible to
Displaying 151 - 175 of 1316