Results 21 to 30 of about 370 (179)

Preparation and Characterization of Al/HTPB Composite for High Energetic Materials

Nanomaterials, 2020
Nanosized Al (nAl) powders offer increased reactivity than the conventional micron-sized counterpart, thanks to their reduced size and increased specific surface area.
Alexander Vorozhtsov, Marat Lerner, Nikolay Rodkevich, Sergei Sokolov, Elizaveta Perchatkina, Christian Paravan   +5 more
doaj   +1 more source

Effect of spherical Al-Mg-Zr on the combustion characteristics of composite propellants

FirePhysChem, 2022
In this work, spherical Al-Mg-Zr alloy with intensive heat release were characterized and compared to neat Al powders. The morphology, element distribution and thermal performance were characterized by TEM, SEM, Mapping and TG-DSC.
Zhao Qin, Jianhua Yi, Weiqiang Pang, Changjian Wang, Haijian Li, Huixiang Xu, Bei Qu, Fengqi Zhao, Ning Hao, Xuefeng Huang   +9 more
doaj   +1 more source

Effect of Mechanical Heterogeneity on the Structural Integrity of HTPB Propellant Grain

Materials, 2023
To investigate the structural effects of the mechanical heterogeneity of Hydroxyl-terminated polybutadiene (HTPB) propellant grain under ignition pressurization, a gradient finite element method was proposed to evaluate its structural integrity. The heterogeneous mechanical properties of the propellant grain were constructed and assessed.
Xiangyang Liu, Buqing Hui, Hui Wang, Hang Chen, Dongmo Zhou   +4 more
openaire   +2 more sources

Application of artificial neural networks for the prediction of aluminium agglomeration processes

International Journal of Aviation, Aeronautics, and Aerospace, 2018
Aluminium is universal and vital constituent in composite propellants and typically used to improve performance. Aluminum agglomeration takes place on the burning surface of aluminized propellants, which leads to reduced combustion efficiency and 2P flow
TEJASVI K, Y PYDI SETTY, VEMANA VENKATESWARA RAO, KALYAN CHAKARVARTHY   +3 more
doaj   +1 more source

The effect of Al/oxidizers interfacial structure on the mechanical properties of composite propellants

Polymer Testing, 2023
In this paper, the mechanical properties of a typical four-component composite solid propellants with various designed Al/oxidizer interfaces have been studied.
Xiang Lv, Jiaxing Xu, Ruixuan Xu, Wuxi Xie, Qazi Wasiullah, Qi-Long Yan   +5 more
doaj   +1 more source

Strain-rate correlation of biaxial tension and compression mechanical properties of HTPB and NEPE propellants

AIP Advances, 2022
An effective biaxial tension and compression test method is proposed based on the shortcomings of current research for the mechanical properties of solid propellants under complex stress states.
Qizhou Wang, Guang Wang, Zhejun Wang, Hongfu Qiang, Xueren Wang, Shudi Pei   +5 more
doaj   +1 more source

Modeling and rheology of HTPB based composite solid propellants

Polymer Composites, 1998
AbstractThe propellant with the minimum viscosity required for a defect‐free casting can be obtained by proper selection of the size and fractions of solid components leading to maximum packing density. Furnas' model was used to predict the particulate composition for the maximum packing density.
Erisken, C, Gocmez, A, Yilmazer, U, Pekel, F, Ozkar, S   +4 more
openaire   +2 more sources

Effects of Nano-Sized Al on the Combustion Performance of Fuel Rich Solid Rocket Propellants

Eurasian Chemico-Technological Journal, 2016
Several industrial- and research – type fuel rich solid rocket propellants containing nano-metric aluminum metal particles, featuring the same nominal composition, were prepared and experimentally analyzed.
W.Q. Pang, F. Q. Zhao, L. T. DeLuca, C. Kappenstein, H. X. Xu, X. Z. Fan   +5 more
doaj   +1 more source

Modeling of diffusion and premixed flame of AP/HTPB laminate propellant [PDF]

Progress in Propulsion Physics, 2009
Composite propellants feature a diusion §ame. The size of oxidizer particlesleveragesomecombustionproperties(mainly,burningrateand pressure sensitivity) along with §ame structure. Macroscopic combus- tion features are strictly related to those events occurringinside the gas phase and close to the burning surface.
MAGGI, FILIPPO, DE LUCA, LUIGI, COLOMBO, GIOVANNI, BANDERA, ALESSIO, GALFETTI, LUCIANO   +4 more
openaire   +3 more sources

Combustion characteristics of cross-linked fluorinated polymer supported aluminum/oxidizer microsphere in HTPB propellant

FirePhysChem, 2022
Combustion behaviors of propellant depend heavily on the architecture of the pocket bounded by coarse AP particles. In order to achieve a better control of the meso-scale architecture of the pocket, overcoming random mixing of the fine particles inside ...
Tianfu Zhang, Nan Yao, Chongyang Zhou, Yang Li, Yanpeng Zhao, Aimin Pang, Shixi Wu   +6 more
doaj   +1 more source