Results 111 to 120 of about 467,855 (300)

Time‐Dependent Oxidation and Scale Evolution of a Wrought Co/Ni‐Based Superalloy

Advanced Engineering Materials, EarlyView.
This study shows how a new wrought Co/Ni‐based superalloy resists oxidation at 800 ∘$^\circ$C. The oxide scale changes from rough, fast‐growing spinel to a dense, protective chromia–alumina layer. Atom probe analysis reveals tiny refractory‐rich bubbles at the interface that mark the transition to long‐term, diffusion‐controlled protection ...
Cameron Crabb, Zachary T. Kloenne, Samuel R. Rogers, Chi Hang Dominik Kwok, Mark C. Hardy, Michele S. Conroy, David Dye   +6 more
wiley   +1 more source

Dual-Promoted Trimetallic CoMo-Ni/Al₂O₃-K₂O Catalysts: Impact of K₂O Doping on Guaiacol Hydrodeoxygenation Selectivity

Inorganics
The influence of potassium oxide (K2O) doping on the hydrodeoxygenation (HDO) performance of trimetallic CoMo–Ni/Al2O3 catalysts was systematically investigated using guaiacol as a lignin-derived model compound.
Kenian L. Arévalo Blanco, Wilder S. Campo Baca, Esneyder Puello Polo   +2 more
doaj   +1 more source

Workflow for Design of Experiments‐Based Modeling of Species Transport and Growth Kinetics in GaN Hydride Vapor Phase Epitaxy

Advanced Engineering Materials, EarlyView.
A novel workflow for investigating hydride vapor phase epitaxy for GaN bulk crystal growth is proposed. It combines Design of experiments (DoE) with physical simulations of mass transport and crystal growth kinetics, serving as an intermediate step between DoE and experiments.
J. Tomkovič, G. Lukin, H. Torkashvand, A. Kerschbaum, M. Müller, S. Besendörfer, J. Heitmann, J. Friedrich   +7 more
wiley   +1 more source

Higher-order Abel equations: Lagrangian formalism, first integrals and Darboux polynomials

, 2009
A geometric approach is used to study a family of higher-order nonlinear Abel equations. The inverse problem of the Lagrangian dynamics is studied in the particular case of the second-order Abel equation and the existence of two alternative Lagrangian ...
Abraham R, Boyko V M, Boyko V M, Briskin M, Cariñena J F, Crampin M, Crampin M, Damianou P A, Darboux G, Darboux G, Darboux G, Davis H T, Erbe L, Fernandes R L, Francoise J P, Grundland A M, José F Cariñena, Lopuszanski J, López C, Manuel F Rañada, Murphy G M, Nucci M C, Partha Guha, Polyanin A D, Sarlet W, Sarlet W, Zwillinger D   +26 more
core   +1 more source

Copper Nanocrystallization in Anodic Oxide Films of Ti–Cu‐Based Bulk Metallic Glass and Its Effect on the Corrosion Resistance and Cytocompatibility

Advanced Engineering Materials, EarlyView.
Viktoriia Shtefan, Thorgund Nemec, Ute Hempel, Annett Gebert and coworkers demonstrate that anodic treatment of Ti–Cu‐based metallic glass in a nontoxic pyrophosphate electrolyte forms a protective bilayered Ti/Zr‐oxide film enriched with Cu nanocrystals.
Viktoriia Shtefan, Nora Fernández Navas, Thorgund Nemec, Ivan Kaban, Ute Hempel, Andrea Voss, Volker Hoffmann, Darius Pohl, Annett Gebert   +8 more
wiley   +1 more source

In Situ Micromechanical Study of Bimodal γ′–γ″ Precipitate Assemblies in Ni–Cr–Al–Nb Superalloy

Advanced Engineering Materials, EarlyView.
A Ni–Cr–Al–Nb superalloy with a bimodal γ′–γ″ precipitate distribution is developed. Composite precipitate assemblies form through heterogeneous nucleation, effectively impeding dislocation motion. Micropillar compression reveals high strength at room and elevated temperatures, governed by precipitate shearing, with coupled faulting mechanisms ...
Ujjval Bansal, Tae‐Hyeok Kang, Pyuck‐Pa Choi, Subin Lee, Christoph Kirchlechner   +4 more
wiley   +1 more source

Characterization of a lipase from a newly isolated Pseudomonas sp

Iranian Journal of Microbiology, 2013
Background and Objectives: Lipases are valuable biocatalysts which are widely used in the detergent, food, dairy and pharmaceutical industries. The aims of the present study included the isolation of a lipase-producer from industrial zones and the ...
Reyhameh Noormohamadi, Fatemeh Tabandeh, Parvin Shariati, Maryam Otadi   +3 more
doaj  

Molecular Dynamics Studies of Shape Memory Polymers: From Bead–Spring Models to Atomistic Simulations

Advanced Engineering Materials, EarlyView.
Coarse‐grained (left) and atomistic (right) models of the shape memory polymer ESTANE ETE 75DT3 are shown schematically. The two representations bridge molecular detail and mesoscopic description. Both models capture shape memory behavior, linking segmental mobility and conformational relaxation of anisotropic chains to macroscopic recovery, and ...
Fathollah Varnik
wiley   +1 more source

Constantes cinéticas de flotación del grupo maceral vitrinita de dos carbones colombianos

Ingeniería e Investigación, 2009
Las constantes cinéticas de flotación del grupo maceral vitrinita son importantes para diseñar columnas de flotación destinadas a separar este grupo maceral.
Jorge Luís Piñeres Mendoza, Juan Manuel Barraza Burgos, Astrid del Socorro Blandón Montes   +2 more
doaj  

Supplementary kinetic constants of charged particles

, 2006
We put forward: (A) An improved description of classical, kinetic properties of a charged pointlike physical particle that consists, in addition to its mass and charge, also of the Eliezer and Bhabha kinetic constants; and (B) a proposal to evaluate these kinetic constants by considering the trajectories of charged particles in an acccelerator.
Ribaric, Marijan, Sustersic, Luka
openaire   +2 more sources