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Displaying 401 - 425 of 2634

Gravitational Effects on Mercuric Iodide Crystal Growth

February 19, 2017
Author(s)
B W. Steiner, L van den Berg, U Laor
Gravity can affect the physical vapor growth of mercuric iodide in two distinct ways. First, gravity will induce convection during growth, which strongly mixes residual impurities and any elementary gases resulting from imperfect stoichiometry, either of

Green Body Density Measurement Techniques

February 19, 2017
Author(s)
P Pei, J Anderson, M C. Bhardwaj, Dennis B. Minor, T Thornton
Green body density measurement techniques were investigated and compared. The measurement techniques investigated include mass-volume measurement, mercury pycnometry, powderdisplacement pycnometry, and noncontact ultrasonic method. Samples studied include

Habits of Grains in Dense Polycrystalline Solids

February 19, 2017
Author(s)
D M. Saylor, B S. El-Dasher, Y Pang, H M. Miller, P Wynblatt, Anthony D. Rollett, G S. Rohrer
Three-dimensional interfacial networks in polycrystalline solids are topologically and crystallographically complex. With a few notable exceptions, most of what we know about the distribution of three-dimensional grain shapes has been derived from foams or

Hierarchical Roughness Makes Superhydrophobic States Stable

February 19, 2017
Author(s)
Michael Nosonovsky, Bharat Bhushan
Roughness enhances hydrophobicity of a solid surface leading to high contact angles with water. To achieve low contact angle hysteresis along with a high contact angle, superhydrophobic surfaces should form composite interface (CI) with air pockets in the

High Performance Tribology Systems: Design Consideration

February 19, 2017
Author(s)
Stephen M. Hsu
Since the 1980s, the pace of technology innovations has accelerated exponentially. The advent of high efficiency yet environmental friendly diesel engine technology, micro-electro-mechanical devices (MEMs), better and more durable biomaterials, and ever

How Standards Help Bring New Materials to the Market

February 19, 2017
Author(s)
Stephen W. Freiman, George D. Quinn
This paper attempts to describe the importance of standards in helping to bring new materials to the market place. Using ceramic materials as an example, the different ways that standards can be important in the materials development process are outlined

ICSD Accessibility in Support of Materials Research and Design

February 19, 2017
Author(s)
Vicky L. Karen, A J. Belsky
The materials community in both science and industry use crystallographic data models on a daily basis to visualize, explain, and predict the behavior of chemicals and materials. Access to reliable information on the structure of crystalline materials

Influence of Particle Size on DCPD Hydrolysis and Setting Properties of TTCP/DCPD Cement

February 19, 2017
Author(s)
Limin Sun, Laurence C. Chow, Shozo Takagi, Elena F. Burguera, Stanislav Frukhtbeyn
This study investigated the effects of particle size on the hydrolysis reaction of DCPD at pH 7 and 37 C and on the setting properties of a TTCP/DCPD cement. The kinetics of the hydrolysis reaction was controlled by a nucleation and growth mechanism

Instability of Adhesion Force Between Rough Surfaces

February 19, 2017
Author(s)
Michael Nosonovsky, Seung H. Yang, Huan Zhang
Adhesion force has a significant effect upon the contact of rough surfaces with nanoscale asperities. The dominant component of the adhesion force is the capillary force caused by condensed water menisci. The capillary force depends upon the meniscus shape

Interfacial Dewetting in Silicon Nitride Containing Aligned Grains

February 19, 2017
Author(s)
B Hockey, D S. Park, H D. Kim, S W. Lee
It is generally believed that liquid phase sintering of silicon nitride invariably results in a continuous intergranular phase such that individual grains are separated by a glassy interphase, typically as thin as I nm. To the contrary, results presented

Lateral Force Microscope Calibration Using a Modified AFM Cantilever

February 19, 2017
Author(s)
Mark Reitsma
A proof-of-concept study is presented for a new force transducer and associated calibration method that provides a path for quantitative friction measurements using a Lateral Force Microscope. The transducer design is an Atomic Force Microscope (AFM)
Displaying 401 - 425 of 2634
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