American Ceramic Society Bulletin

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Int’l Journal of Applied Ceramic Technology preview
All ACerS members are provided free online access
to the International Journal of Applied Ceramic
Technology. Go to www.ceramics.org, enter
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to this journal (not free to members) are sold online by
Wiley–Blackwell Publishing, www.wiley.com.
New papers are posted to the “Online Early” page as
soon as they are ready for publication, even before the
issue is printed. Below are samples of what’s coming.
SiAlON–SiC Sandwich Structures with Tailored
Surface Compression
Kyle Hoff, David J. Green, Youngho Jin, Earle Ryba and
John R. Hellmann
This Pennsylvania State University research team evaluated
the feasibility of producing high-hardness ceramic
sandwich structures – SiAlON faces and SiC cores – with
compressive residual stresses in the faces. The team reports
that it was necessary to hybridize the SiAlON faces by
adding SiC particles to reduce the thermal expansion mismatch
between the face and the core and to avoid cracking
during processing.
Nanostructured, Infrared-Transparent
Magnesium-Aluminate Spinel with Superior
Mechanical Properties
Thomas Mroz, Lee M. Goldman, Andrew D. Gledhill,
Dongsheng Li and Nitin P. Padture
These researchers from Surmet Corp. and Ohio State
University fabricated nanostructured magnesium aluminate
spinel with a highly uniform grain-size distribution for infrared
window/dome applications using Y 2 O 3 sintering additive.
They report that this spinel has high room-temperature
strength, reliability, improved erosion and thermal-shock
resistance, and near-theoretical in-line infrared transmission.
Physicochemical Properties and
Biocompatibility of Tricalcium and Dicalcium
Silicate Composite Cements after Hydration
Maryam Mazrooei Sebdani and Mohammad Hossein Fathi
This research team from People’s Republic of China
explored various proportions of Ca 3 SiO 5 and Ca 2 SiO 4 composite
cements and evaluated their physicochemical properties
and in-vitro biocompatibility after hydration. The
team reports that the composites exhibited better strength
and shorter setting time than pure Ca 3 SiO 5 or Ca 2 SiO 4 and
that composite hydration products could induce formation
of apatite layers on surfaces in simulated body fluid.
Development of a Test Technique to Determine
the Thermal Diffusivity of Large Refractory
Ceramic Test Specimens
James G. Hemrick, Ralph B. Dinwiddie, Erick R. Loveland and
Andre Prigmore
This Oak Ridge National Laboratory team has developed
and validated a technique to use a high-intensity
plasma arc lamp to measure thermal diffusivity of bulk
refractory materials at elevated temperatures. They report
that the new technique resolves sample size and inherent
problems of current standardized test methods.
Hexagonal-Boron Nitride as a New Ultraviolet
Luminescent Material and Its Application
Kenji Watanabe and Takashi Taniguchi
Watanabe and Taniguchi report that high-purity h-BN
crystals grown by the solvent growth method exhibit electronic
excitation states near the band gap that are governed
by optically allowed exciton effects. The excitonic
luminescence bands can be used for far-ultraviolet plane
light-emitting devices excited by field emitters.
Depression Effects of Al on Oxidation of
Diamond During Sintering of Diamond/
Borosilicate Glass Composites
Xianghong Zhang, Yanhui Wang, Jianbing Zang,
Xiaozhe Cheng, Xipeng Xu and Jing Lu
This research team from People’s Republic of China
used aluminum powder as an oxygen getter to inhibit the
oxidization and improve the wettability of diamond grits
by the matrix during sintering of diamond/glass composites.
The team reports the aluminum powder decreases volume
expansion rate and increases bending strength.
Fabrication and Characterization of Anode-
Supported BaIn 0.3 Ti 0.7 O 2.85 Thin Electrolyte for
Solid Oxide Fuel Cell
Mathilde Rieu, Pankaj Kumar Patro, Thibaud Delahaye and
Etienne Bouyer
This international research team fabricated SOFC
anode-supported half cells using a NiO–8YSZ anode support
and a BaIn 0.3 Ti 0.7 O 2.85 electrolyte thin film. The team
reports that the cermet electrode had a homogeneous
microstructure with a well-defined anode/electrolyte interface,
was stable at high temperature and retained dimensional
control with no surface defects.
50 American Ceramic Society Bulletin, Vol. 90, No. 4