Results 71 to 80 of about 13,314,477 (348)

Impact of Pre‐Oxidation Treatments on a Recycled MgO/Steel‐Composite as Carbon Free Anode in Aluminum‐Electrolysis Environments

open access: yesAdvanced Engineering Materials, EarlyView.
Cermets (60 vol.% AISI 316L stainless steel, 40 vol.% recycled MgO), intended for use in aluminum electrolysis, were pre‐oxidized in three furnaces with different heating technologies and subjected to a cryolite corrosion test. The different atmospheres influenced the formation of oxide layers, which in turn affected corrosion resistance and ...
Patricia Kaiser   +4 more
wiley   +1 more source

Combustion of solid propellant with micron-sized Aluminium under the acceleration force

open access: yesMATEC Web of Conferences, 2017
The paper presents a physical-mathematical model for metallized solid propellant combustion under acceleration directed along the normal to the burning surface.
Poryazov Vasily, Krainov Dmitry
doaj   +1 more source

Effect of DBTDL Cure Catalyst on Mechanical and Ballistic Properties of a Composite Igniter [PDF]

open access: yesفناوری در مهندسی هوافضا, 2020
Igniters are main sections of motor that initiate the ignition of propellant grain. Large motors usually use pyrogen composite igniters. Pyrogen igniters have similar formulation with solid composite propellants, but their burning rate is relatively high.
Ahmad Mollaei   +3 more
doaj  

s-Process Nucleosynthesis in Advanced Burning Phases of Massive Stars

open access: yes, 2006
We present a detailed study of s-process nucleosynthesis in massive stars of solar-like initial composition and masses 15, 20,25, and 30 Msun. We update our previous results of s-process nucleosynthesis during the core He-burning of these stars and then ...
Baraffe I.   +7 more
core   +2 more sources

Type I X-ray Bursts at Low Accretion Rates [PDF]

open access: yes, 2006
Neutron stars, with their strong surface gravity, have interestingly short timescales for the sedimentation of heavy elements. Recent observations of unstable thermonuclear burning (observed as X-ray bursts) on the surfaces of slowly accreting neutron ...
Brown, Edward F.   +2 more
core   +4 more sources

Biomass Native Structure Into Functional Carbon‐Based Catalysts for Fenton‐Like Reactions

open access: yesAdvanced Functional Materials, EarlyView.
This study indicates that eight biomasses with 2D flaky and 1D acicular structures influence surface O types, morphology, defects, N doping, sp2 C, and Co nanoparticles loading in three series of carbon, N‐doped carbon, and cobalt/graphitic carbon. This work identifies how these structural factors impact catalytic pathways, enhancing selective electron
Wenjie Tian   +7 more
wiley   +1 more source

The treatment of mixing in core helium burning models -- III. Suppressing core breathing pulses with a new constraint on overshoot

open access: yes, 2017
Theoretical predictions for the core helium burning phase of stellar evolution are highly sensitive to the uncertain treatment of mixing at convective boundaries.
Campbell, Simon W.   +2 more
core   +1 more source

Carbon Flashes in the Heavy Element Ocean on Accreting Neutron Stars [PDF]

open access: yes, 2001
We show that burning of a small mass fraction of carbon in a neutron star ocean is thermally unstable at low accumulated masses when the ocean contains heavy ashes from the hydrogen burning rapid proton (rp) process. The key to early unstable ignition is
Andrew Cumming   +7 more
core   +2 more sources

Host‐Directed Biomaterials for Combatting Bloodstream Infections: From Macrocyclic Peptides to Immune‐Activating Cell Backpacks

open access: yesAdvanced Functional Materials, EarlyView.
Bloodstream infections (BSI) are one of the leading causes of mortality and morbidity in both civilian and military populations. This paper summarizes recent progress in novel treatment strategies to manage BSI arising from both bacterial and fungal pathogens using molecules, particles, and materials to elicit host‐directed immunity.
Thomas Thomou   +11 more
wiley   +1 more source

Solid propellant rocket motor [PDF]

open access: yes, 1973
The characteristics of a solid propellant rocket engine with a controlled rate of thrust buildup to a desired thrust level are discussed. The engine uses a regressive burning controlled flow solid propellant igniter and a progressive burning main solid ...
Behm, J. W.   +3 more
core   +1 more source

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