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Bioscience

Biomaterials

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Displaying 151 - 175 of 3439

Self-Assembled Multiferroic Nanostructures in CoFe 2 O 4- PbTiO 3 System

October 12, 2021
Author(s)
Jiying Li, Igor Levin, Julia Slutsker, Virgil Provenzano, Peter K. Schenck, J.H. Yang, Alexander L. Roytburd
The effect of substrate orientation of the morphologies of epitaxial self-assembled nanostructures was demonstrated using newly synthesized multiferroic 0.67PbTiO3-0.33CoFe2O4 nanocomposite thin films. The two-phase nanostructures were grown on single

Shape of Hollow Dislocation Cores: Elastic and Anisotropic Surface Energy Effects

October 12, 2021
Author(s)
David J. Srolovitz, N Sridhar, J P. Hirth, John W. Cahn
Evidence for the existence of hollow core dislocations has existed for nearly forty years. Such hollow cores are often found in growth spirals associated with screw dislocations. Examples of this type of morphology may be found in silicon carbide, copper

Simulating Thermal Response of EB-PVD Thermal Barrier Coating Microstructures

October 12, 2021
Author(s)
M Bartsch, U Schulz, J M. Dorvaux, O Lavigne, Lin-Sien H. Lum, Stephen A. Langer
As ceramic thermal barrier coatings (TBC) are used in more critical applications in advanced engines, knowing basic physiproperties of TBC's is essential for design and reliability assessment. In particular, knowledge of thermal conductivity is cruciin

Simulation of a Single Asperity Impacts at Head-Disk Interface

October 12, 2021
Author(s)
Tze J. Chuang, Stephen M. Hsu
During the track accessing mode of a hard disk drive, the flying height of the slider over the disk surface becomes smaller and smaller as the demand in data storage a real density increases. As a result, the propensity of glide avalanche is bound to

SiO 2 /Si 3 N 4 /A1 2 O 3 Stacks on Silicon for Scaled-Down Memory Devices: Effects of Interfaces and Thermal Annealing

October 12, 2021
Author(s)
M Lisiansky, A Heiman, M Kovler, Y Roizin, Igor Levin, A Gladkikh, M Oksman, R Edrei, A A. Hofman, Y Shnieder, T Claasen
Effects of interfaces and thermal annealing on the electrical performance of the SiO2/Si3N4/A12O3 (ONA) stacks in non-volatile memory devices were investigated. Structural and electrical characterization demonstrated the principal role of the Si3N4/A12O3

Solidus Phase Relationships in the AO-Al 2 O 3 -Nb 2 O 5 (A = Ca, Sr) Systems

October 12, 2021
Author(s)
Julia Y. Chan, Wilma Feb-Ayala, L D. Rotter, Igor Levin, Richard G. Geyer
Dielectric ceramics for wireless communications exhibiting modest permittivity, high quality factor (Q), and near-zero temperature coefficient are needed for high frequency, high power applications. Efforts are in progress to replace Ta 2O 5-based ceramics

Stoichiometry and Phase Composition of MOCVD Barium Titanate Films

October 12, 2021
Author(s)
Charles E. Bouldin, Joseph Woicik, Bruce Ravel, Debra Kaiser, Mark D. Vaudin
X-ray absorption fine structure (XAFS), x-ray diffraction (XRD) and x-ray fluorescence (XRF) have been used to study the stoichiometry and phase composition of thin (approximately equal to} 1 micron) films deposited on MgO substrates. Deposition

Strength Evaluation on a Composite Marine Propeller Blade

October 12, 2021
Author(s)
H J. Lin, J J. Lin, Tze-Jer Chuang
The strength of a composite propeller blade is evaluated by performing a nonlinear hydro-elastic analysis. The finite element method, lifting surface theory, least square method, equilibrium equation and Hashin failure criteria are employed for the

Structure and Crystal Chemistry of M 0.5 Ta 0.5 B (M = Ti, Zr, and Hf)

October 12, 2021
Author(s)
I Talmy, J Zaykoski, J A. Kudak, Winnie Wong-Ng
During the development of refractory composites (cermets) combining MB2 (M=Ti, Zr, or Hf) ceramics and Ta metal, three new phases of compositions M0.5Ta0.5B were discovered. Preliminary determination of lattice parameters using x-ray powder diffraction

Subsolidus Phase Relationships in the AO-AI 2 O 3 -Nb 2 O 5 (A=Ca, Sr) Systems

October 12, 2021
Author(s)
Julia Y. Chan, Wilma Feb-Ayala, J. M. Loezos, L D. Rotter, Lyle E. Levine, Richard G. Geyer
Dielectric ceramics for wireless communications exhibiting modest permittivity, high quality factor (Q), and near-zero temperature coefficient are needed for high-frequency, high power applications. Efforts are in progress to replace Ta 2O 5-based ceramics
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