Results 41 to 50 of about 4,813 (241)

Resonant Raman scattering in cubic and hexagonal boron nitride [PDF]

, 2005
We measured first- and second-order Raman scattering in cubic and hexagonal boron nitride using excitation energies in the visible and in the UV. The nonresonant first-order Raman susceptibilities for cubic and hexagonal BN are 1 and 10Å2, respectively ...
Reich, S., Robertson, J., Ferrari, A. C., Arenal, R., Loiseau, A.   +4 more
core   +1 more source

Designing Polymer Nanocomposites for X‐Ray Shielding: Mechanisms, Architectures, and Scalable Processing

Advanced Engineering Materials, EarlyView.
This review highlights advances in lightweight, lead‐free polymer nanocomposites for diagnostic X‐ray shielding. By linking filler chemistry, dispersion, architecture, and photon interaction mechanisms, it establishes structure–performance relationships guiding material design.
Aklilu G. Messele, Hossein Ipakchi, Tizazu H. Mekonnen   +2 more
wiley   +1 more source

Influência da microgeometria do gume e da classe de PCBN no corte ortogonal de aço rápido fabricado por metalurgia do pó [PDF]

, 2013
Tese (doutorado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-graduação em Engenharia Mecânica, Florianópolis, 2013.Materiais fabricados pela metalurgia do pó utilizados em componentes automotivos, especificamente em ...
Souza, Dilson José Aguiar de
core  

Unraveling the Electronic Structure of Silicon Vacancy Centers in 4H‐SiC

Advanced Functional Materials, EarlyView.
The electronic structure of the silicon vacancy in 4H‐SiC is probed via transient absorption spectroscopy, uncovering previously inaccessible excited states of the quartet and doublet spin channels, including the V2' transition. In combination with theoretical analysis, a comprehensive picture of the electronic structure is established.
Ali Tayefeh Younesi, Minh Tuan Luu, Christopher Linderälv, Vytautas Žalandauskas, Marianne Etzelmüller Bathen, Nguyen Tien Son, Takeshi Ohshima, Gergő Thiering, Lukas Razinkovas, Ronald Ulbricht   +9 more
wiley   +1 more source

Research Update: Direct conversion of h-BN into pure c-BN at ambient temperatures and pressures in air

APL Materials, 2016
We report a direct conversion of hexagonal boron nitride (h-BN) into pure cubic boron nitride (c-BN) by nanosecond laser melting at ambient temperatures and atmospheric pressure in air.
Jagdish Narayan, Anagh Bhaumik
doaj   +1 more source

Properties of Al contacts to Si surface exposed in the course of plasma etching of previously grown nanocrystalline c-BN film

Journal of Telecommunications and Information Technology, 2005
Properties of Al electric contacts to Si(p) surface exposed to fluorine-based plasma etching of nanocrystalline cubic boron nitride (c-BN) film grown previously were studied and compared to the properties of Al contacts fabricated on pristine or dry ...
Piotr Firek, Aleksander Werbowy, Jan Szmidt, Andrzej R. Olszyna   +3 more
doaj   +1 more source

High pressure phase transformations of cubic boron nitride from amorphous boron nitride using magnesium boron nitride as the catalyst

, 1995
Results are described of high pressure phase transformations of amorphous boron nitride (aBN) to cubic boron nitride (cBN) using magnesium boron nitride (Mg3B2N4) as a catalyst-solvent.
Singh, B. P., Will, G., Nover, G.
core   +1 more source

Unlocking Exceptional Strengthening in Aluminum Alloys via Interstitial Cottrell Atmosphere Formation

Advanced Functional Materials, EarlyView.
Cyclic unloading‐aging‐reloading micro‐tensile tests under various aging durations and temperatures, combined with comprehensive microstructural characterization reveal that the yield point phenomenon in Aluminum‐Carbon (Al‐C) thin films originates from Cottrell atmosphere formation.
Zion Lee, Hojang Kim, Yixuan Hu, Injong Oh, Tae‐Hyeok Kang, Hyeonbeen Noh, Yuhyun Park, Sunkun Choi, Pyuck‐Pa Choi, Kolan Madhav Reddy, Gi‐Dong Sim   +10 more
wiley   +1 more source

Electrodischarge Drilling of Microholes in c-BN

Micromachines, 2020
Cubic boron nitride (c-BN) is a “difficult-to-cut” material. High precision machining of this material is problematic because it is difficult to control the material removal rate and maintain acceptable accuracy.
Dominik Wyszynski, Wojciech Bizon, Krzysztof Miernik   +2 more
doaj   +1 more source

Mixed‐Metal Promotion in a Manganese‐Molybdenum Oxynitride as Catalyst to Integrate C─C and C─N Coupling Reactions for the Direct Synthesis of Acetonitrile from Syngas and Ammonia

Advanced Materials, EarlyView.
Transition metal oxy/carbo‐nitrides show great promise as catalysts for sustainable processes. A Mn‐Mo mixed‐metal oxynitride attains remarkable performance for the direct synthesis of acetonitrile, an important commodity chemical, via sequential C─N and C─C coupling from syngas (C1) and ammonia (N1) feedstocks.
M. Elena Martínez‐Monje, Wilson Henao, Tania Rodenas, Patricia Concepción, Virginia Pérez Dieste, Alexander Missyul, Giovanni Agostini, Gonzalo Prieto   +7 more
wiley   +1 more source