2004
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January
Friction Coefficient between Powder and Die during Compaction of Ceramic Powders
W. Vandermeulen and J. Luyten
Flemish Institute for Technological Research (Vito), Mol, Belgium
The shear plate method has been used to determine the friction coefficient between zirconia powder and zirconia and tungsten carbide plates.
View Article
NIST Announces New Standard Reference Material
George Quinn
NIST, Gaithersburg, Md.
A standard reference material for Vickers hardness of
ceramics and hardmetals is available off-the-shelf from NIST. View
Article
Emerging Technology Conferences Deliver Visions of the Future
Patricia A. Janeway, Editor
Three major events—the Emerging Technologies Conference at MIT, Frost & Sullivan’s 2003 Emerging Technologies Award ceremonies and BCC’s Nanoparticles 2003 Conference—captured the attention and imagination of a diverse group of attendees. View Article
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February
Mg MMC Closed Die Forgings for Automotive Applications
V.M. Kevorkijan
Independent Researching, Maribor, Slovenia
Weight decrease in redesigned connecting rods was determined, and the substitution of magnesium and aluminum-based materials for steel was compared in terms of cost to demonstrate economic advantages.
View Article
Deairing of Aqueous Gelcasting Slurries
Santanu Dhara and Parag Bhargava
Materials Science Centre, IIT Kharagpur, West Bengal, India
K. Sri. Ramakanth
Metallurgical and Materials Engineering, IIT Kharagpur, West Bengal, India
Preparation of gelcasting slurries by mixing and milling results in significant air bubbles in the slurries that might be eliminated using deairing treatments, including antifoaming agents, idling and vacuum.View Article
Digital Library of Ceramic Microstructures: Part 1, Digital Library
R.R. Wills and M.H. Peirson
University of Dayton Research Institute, Dayton, Ohio
M.K. Ferber
Mechanical Test & Instrumentation Co., Oak Ridge, Tenn.
V. Tennery
Tennery Consulting Inc., Oak Ridge, Tenn.
J. Sankar and S. Yarmolenko
North Carolina A&T University, Greensboro, N.C.
N.N. Thadhani
Georgia Institute of Technology
M.Velez
Mo-Sci Corp., Rolla, Mo.
M.Karakus
University of Missouri-Rolla, Rolla, Mo.
An interactive website that contains >900 images of 30 ceramics that range from monolithic ceramics to composites and nanoceramics has been constructed to help facilitate ceramic education and research. View Article
NovaTest: A Biophotonics System for Rapid In-Vitro Toxicity Testing
Larry L. Hench and Ioan Notingher
Dept. of Materials, Imperial College of Science and Technology, London, U.K.
NovaTest is an integrated living cell and biophotonics system developed for rapid in-vitro monitoring and testing of potentially toxic chemicals as well as environmental or biological agents. View Article
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March
Ceria Cutting Tool
A. Senthil Kumar and A. Raja Durai
Dept. of Manufacturing Engineering, College of Engineering, Anna University, Chennai, India
T. Sornakumar
Dept. of Mechanical Engineering, Thiagarajar College of Engineering, Madurai, India
A new ceria ceramic cutting-tool insert has been developed that performs comparable with commercial ZTA when machining gray cast-iron work pieces. View Article
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April
Digital Library of Ceramic Microstructures: Part 2, Virtual Experiments Laboratory
R.R. Wills and M.H. Peirson
University of Dayton Research Institute, Dayton, Ohio
M.K. Ferber
Mechanical Test & Instrumentation Co., Oak Ridge, Tenn.
V. Tennery
Tennery Consulting Inc., Oak Ridge, Tenn.
J. Sankar and S. Yarmolenko
North Carolina A&T University, Greensboro, N.C.
N.N. Thadhani
Georgia Institute of Technology
M.Velez
Mo-Sci Corp., Rolla, Mo.
M.Karakus
University of Missouri-Rolla, Rolla, Mo.
The Virtual Experiments Lab includes measurement of grain and particle size; alteration of the color scale, brightness and contrast of the image; magnification of selected regions; and measurement of the size of selected features. View Article
Influence of Al2O3 Powders on the Properties of Sintered Ceramics
M.R. Ivanovic and I. Boskovic
Faculty of Metallurgy and Technology, Podgorica, Serbia and Montenegro
V. Jokanovic
Institute of Technical Sciences of the SANU, Belgrade, Serbia and Montenegro
M. Nenezic
KAP, Podgorica, Serbia and Montenegro
A functional relationship can be established between the average particle size, specific surface area and microstructure of powders and the microstructural and physical properties of their sintered compacts.
View Article
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May
Virtual Processing of Advanced Nanomaterials
Liudmila A. Pozhar
Dept. of Chemical Engineering, University of Tennessee, Knoxville
Valmor F. de Almeida and Michael Z. Hu
Oak Ridge National Lab, Oak Ridge, Tenn.
Simulations are used to explore relations between nanosystem structure, composition, topology and transport coefficients. View Article
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June
Industrial TBCs
A. Kulkarni and H. Herman,
Center for Thermal Spray Research, State University of New York, Stony Brook, New York
Microstructure–property studies were conducted on plasma-spray coatings having splat-based layered structures and on electron-beam physical-vapor-deposited coatings with columnar morphology. View Article
TBC Integrity
J.I. Eldridge, C.M. Spuckler, J.A. Nesbitt and K.W. Street
NASA Glenn Research Center, Cleveland, Ohio
A four-flux pure-scattering model is used to show that MIR reflectance reproducibly tracks the progression of YSZ TBC delamination produced by repeated thermal cycling of plasma-sprayed TBCs coated on superalloy substrates. View Article
Toughening Ceramic Materials, Part 1
George Mayer
Dept. of Materials Science & Engineering, University of Washington, Seattle
New areas of investigation toward increasing toughness of ceramics, including MAX phases, biomimic composites and nano-grain-sized materials, are reviewed. Several aspects of toughening and future research are presented. View Article
Creating Nanoscale Conveyor Belts
Exploring the Potential of Microwaves
Patricia Strickland
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July
Gelcasting SiAlON Radomes
Mark A. Janney and Claudia A. Walls
ORNL, Oak Ridge, Tenn.
Donald M. Kupp
Fraunhofer Resource Center-Delaware, Newark, Del.
Kevin W. Kirby
Hughes Research Lab, Malibu, Calif.
Full-sized
SiAlON radomes were fabricated using aqueous gelcasting with water-resistant
AlN powder and mixing procedures that allowed achievement of high slurry
density and liquid desiccant drying. View Article
Toughening Ceramic Materials, Part 2
George Mayer
Dept. of Materials Science & Engineering, University of Washington, Seattle
New areas of investigation toward increasing toughness of ceramics, including MAX phases, biomimic composites and nano-grain-sized materials, are reviewed. Several aspects of toughening and future research are presented. View Article
SOFCs—Too Hot to Handle?
Helmut Feuer
H.C. Starck GmbH, Selb, Germany
Jonathan Margalit
H.C. Starck Inc., Newton, Mass.
To reach full commercialization in the next decade, solid oxide fuel cells must overcome the cost, reliability and performance challenges.
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August
Preparation of Nanosized Mixed-Oxide Powders
A. Pathak, Sunita Mohapatra, Sasmita Mohapatra, S.K. Biswas, D. Dhak, N.K. Pramanik, A. Tarafdar and P. Pramanik
Dept. of Chemistry, Indian Institute of Technology, Kharagpur, India
A novel and versatile chemical technique has been developed for the preparation of nanosized ceramic powders using thermolysis of aqueous precursor solutions of coordinated metal compounds of organic amines and acids via the formation of mesoporous carbon precursors and their calcination at temperatures <800 K. View Article
Powder Market Update: Nanoceramic Applications Emerge
Thomas Abraham
Quality Sieve Analysis
Space Shuttle Thermal Protection System
Daniel B. Leiser
Almatis—Building on a Tradition of Solutions
Patricia A. Janeway
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September
New Combustion Gas Sensors
Upper Frequency Limits of Piezoceramic Resonators
Arthur Ballato
U.S. Army Communications–Electronics Command, Fort Monmouth, N.J.
New piezoceramic materials currently under development promise low intrinsic acoustic losses and high coupling factors that make them candidates for frequency control and selection applications in the burgeoning telecommunications market. View Article
Ceramic Materials for Electronic, Photonic Applications
David W. Johnson Jr.
Stevens Institute of Technology, Hoboken, N.J.
The discovery of ferroelectric, piezoelectric and ferrimagnetic ceramics, optical fibers, and multilayer ceramic processing has led to many and diverse applications now used in many sophisticated electronic ceramics. View Article
Multimode Underwater Transducers
R.E. Newnham and D.C. Markley
The Materials Research Laboratory, The Pennsylvania State University, University Park, Pa.
R.J. Meyer Jr. and W.J. Hughes
The Applied Research Laboratory, The Pennsylvania State University, University Park, Pa.
A.-C. Hladky-Hennion
C.N.R.S., I.S.E.N, Lille CEDEX, France
J.K. Cochran Jr.
Georgia Institute of Technology, Atlanta, Ga.
Miniature versions of high-power, low-frequency transducers are being optimized to produce broadband transmit and receive responses, engineered vibration modes and optimized acoustic beam patterns. View Article
Spray Drying Dielectric Ceramics
Qi Tan
CTS Communication Components Inc., Albuquerque, N.Mex.
Slurry specific gravity is an important variable in pressure-type and rotary-type spray drying of dielectric ceramic powders. View Article
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October
Powder Flowability Characterizing Techniques
M. Romagnoli and F. Bondioli
Dept. of Material and Environmental Engineering, University of Modena
and Reggio Emilia, Modena, Italy
Experimentally determined indexes for describing the flow behavior of powder
streams in industrial storage, transport and processing operations are reviewed
and discussed in terms of their range of applicability and difficulty of
measurement. It is emphasized that no flowability test is universally applicable.
View Article
A New Tool for Developing Advanced Ceramics
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November
Determining Grain Size in Ceramics
Tadashi Hotta
Japan Fine Ceramics Center, Nagoya, Japan
Junichi Tatami
Graduate School of Environment & Information Sciences, Yokohama National
University, Yokohama, Japan
Hidehiko Tanaka
National Institute for Materials Science, Tsukuba, Japan
Nobuhiro Shinohara
Research Center, Asahi Glass Co. Ltd., Yokahama, Japan
Hideyuki Emoto
Center Research Institute, Denki Kagaku Kougyo Co. Ltd., Machida, Japan
Mitsuru Hattori
Corporate Technical Center, NGK Insulators Ltd., Nagoya, Japan
Yukio Kishi
Research & Development, Nihon Ceratec Co. Ltd., Sendai, Japan
Hiroya Abe and Makio Naito
Joining & Welding Research Institute, Osaka University, Ibaraki, Japan
Keizo Uematsu
Dept. of Chemistry, Nagaoka University of Technology, Nagaoka, Japan
A round-robin test that included nine participants was conducted to
determine the reproducibility and consistency of grain-size measurements
using two standard test methods. View Article
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December
Ceramic Slurries for Electrodeposition in Rapid-Prototyping Applications
Navin Jose Manjooran, Seung-woo Lee, Georgios Pyrgiotakis and Wolfgang M Sigmund
Materials Science and Engineering, University of Florida, Gainesville, Florida
The rheology of α-SiC slurries in the presence of a charging agent with polybutadiene, polystyrene and LP1 as dispersants in an organic dispersing media were investigated using the Krieger—Dougherty equation to determine the maximum solids loading and the application for electrodeposition. View Article
Fabrication of Green SiC Compacts
Dipankar Ghosh, Santanu Dhara and Parag Bhargava
Materials Science Centre, India Institute of Technology, Kharagpur, West Bengal, India
A simple, inexpensive process that uses egg white as a binder for fabrication of green SiC compacts has been developed that requires no dispersing aid or pH adjustment. Sucrose additions lower slurry viscosity and yield stress as well as enhance green strength and elastic modulus. View Article
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