Results 41 to 50 of about 1,712,161 (276)

Characterization of New Lead-free Ballistic Modifiers and Phthalate-free Plasticizers in Propellants

Journal of Aerospace Technology and Management, 2020
This paper describes the synthesis and characterization of a copper-based ballistic modifier, copper subsalicylate (monobasic copper salicylate), and its performance in green-type propellants.
Rosane Macchiarulo Jorge, Acácio Antonio Mesquita Furtado Filho   +1 more
doaj  

Testing of the N₂O/HDPE Vortex Flow Pancake Hybrid Rocket Engine with Augmented Spark Igniter

Aerospace, 2023
The paper is part of the research aimed at determining if the vortex flow pancake (VFP) hybrid rocket engine is feasible as green in-space chemical propulsion.
Tomasz Palacz, Jacek Cieślik
doaj   +1 more source

Current Status and Challenges in Data Collection for Aerospace Coatings Deposited by Plasma Spraying

Advanced Engineering Materials, EarlyView.
An innovative approach has been integrated into the GRENAT project to optimize plasma spraying and coating performance. Raw materials are accelerated and melted in the plasma generated by torches, creating coatings. Monitoring sensors collect process data which are combined with ex situ characterization data.
Lila Randriamananjara, Vincent Rat, Quentin Dubreuil, Patrice Valorge, Simon Goutier, Alain Denoirjean, Olivier Messe, Céline Ruelle, Jean‐Philippe Poli   +8 more
wiley   +1 more source

Microstructure Modification of Additively Manufactured Mo–9Si–8B by Annealing and Its Effects on High‐Temperature Mechanical Properties

Advanced Engineering Materials, EarlyView.
Postbuild annealing systematically modifies the phase fractions and morphology of EB‐PBF processed Mo–9Si–8B. Quantitative microstructure–property correlations reveal how controlled phase evolution enhances high‐temperature compressive strength and creep resistance.
Christopher Schmidt, Yong Chen, Georg Hasemann, Benjamin Wahlmann, Carolin Körner, Manja Krüger   +5 more
wiley   +1 more source

Advances in Sustainable and Wearable Textile Based Soft Robotics

Advanced Functional Materials, EarlyView.
This Review examines advances in wearable textile‐based soft robotics, focusing on sustainable materials, integrated sensing, and scalable actuation. It discusses manufacturing and system integration across healthcare, assistive robotics, prosthetics, and human–machine interfaces, and highlights key challenges in circular design, including life‐cycle ...
Zahir Abbas, Marzia Dulal, Sophia K. Novoselov, Victoria K. Novoselov, Kostya S. Novoselov, Shaila Afroj, Nazmul Karim   +6 more
wiley   +1 more source

Technology of foamed propellants

, 2022
S.239-244Foamed propellants are based on crystalline explosives bonded in energetic reaction polymers. Due to their porous structures they are distinguished by high burning rates.
Böhnlein-Mauß, Jutta, Kröber, Hartmut
core   +1 more source

Impact of Hydrogen Peroxide Concentration on Manganese Oxide and Platinum Catalyst Bed Performance

Aerospace, 2023
This study investigates the use of MnxOy/Al2O3 and Pt/Al2O3 catalysts for the decomposition of hydrogen peroxide in thrusters. It describes the purpose, procedures, performance, and conclusions coming from the test campaign of the catalyst lifetimes.
Adrian Parzybut, Pawel Surmacz, Zbigniew Gut   +2 more
doaj   +1 more source

Biodegradable and Biocompatible Functional Polymers for Biomedical Applications

Advanced Functional Materials, EarlyView.
Biodegradable and biocompatible functional polymers integrate electrical, mechanical, and stimuli‐responsive functionalities while enabling programmed degradation under physiological conditions. This review introduces recent advances in conductive, shape‐memory, self‐healing, photocurable, and adhesive polymer systems, emphasizing material design ...
Won Bae Han, Shuvra Mondal, Sungkeun Han, Chan‐Hwi Eom, Venkata Ramesh Naganaboina, Suk‐Won Hwang   +5 more
wiley   +1 more source

Thermal Characterization of Naturally Aged Propellants

, 2022
S.687-695In this work, seven different, naturally aged gun propellants and four rocket propellants have been investigated by heat flow calorimetry, ARC, mass loss and stabilizer consumption.
Heil, Moritz, Müller, Christian, Hickmann, Jürgen   +2 more
core   +1 more source

Effect of covalent organic framework COF-43 on the thermal decomposition and phase transition of ammonium nitrate

Chemical Engineering Journal Advances
Ammonium nitrate (AN) is a promising chlorine-free oxidizer for green solid propellants (GSPs), but its practical application is limited due to undesirable polymorphic phase transitions at low temperature and endothermic decomposition.
R. Kazemshoar-Duzduzani, A. Mousaviazar, K. Ghani   +2 more
doaj   +1 more source