Efficient construction of double-shelled Ammonium perchlorate based energetic microunits with multiple performance via solvent evaporation method

Fuel, Год журнала: 2025, Номер 386, С. 134180 - 134180

Опубликована: Янв. 7, 2025

Язык: Английский

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Mechanistic analysis and performance comparison of core-shell assembled molecular perovskite energetic materials in HTPB propellant

Journal of Alloys and Compounds, Год журнала: 2025, Номер unknown, С. 180040 - 180040

Опубликована: Март 1, 2025

Язык: Английский

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Mechanistic Analysis and Performance Comparison of Core-Shell Assembled Novel Molecular Perovskite Energetic Materials in Htpb Propellant

Опубликована: Янв. 1, 2025

In-situ assembly of three molecular perovskite energetic materials (DAP-2, DAP-4, and DAN-2) with ammonium perchlorate as a core-shell eutectic oxidizer, the performance mechanism HTPB propellant was investigated. This comprehensive study examined thermal decomposition behavior combustion-agglomeration characteristics oxidizers under pressures ranging from 0.1 to 8.0 MPa. Experimental results demonstrated that synthesized exhibited significant redox reactions during combustion within propellant. The were accompanied by release superoxide ions, which notably enhanced energy release. structure improved interfacial contact, leading increased heat mass transfer efficiency. As result, shorter times burning rates observed, DAP-4 demonstrating best overall among five materials. Additionally, average agglomerate sizes (D50) for RDX-, HMX-, DAP-2-, DAP-4-, DAN-2-based propellants near surface 161.11 μm, 92.51 40.64 30.30 41.16 respectively. agglomeration degree based on significantly lower than RDX HMX-based propellants. reduction in is attributed thin molten skeleton layer high-temperature oxidizing gases produced oxidizers, effectively suppressed aluminum particle surface. dual ultimately resulted enhancement performance.

Язык: Английский

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Efficient construction of core/double-shelled structured AP@nano-graphite@F₂₆₀₃ energetic microcapsules with low sensitivity and hygroscopicity

Nanoscale, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

In this work, AP-based energetic microcapsules with low sensitivity and hygroscopicity were prepared using a two-step continuous coating method, which demonstrated significant potential for applications in the field of propellants.

Язык: Английский

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Micron-Scale Aluminum Coated with Various Types of Metallic Nanoparticles and Its Combustion Performance

Langmuir, Год журнала: 2025, Номер unknown

Опубликована: Фев. 10, 2025

In this study, a new composite material [Quaternary]/μAl (i.e., [nCu+nNi+nCo+nFe]/μAl) was synthesized by coating micron-scale Al with Fe, Co, Cu, and Ni catalysts for the displacement reaction. metal particles form nanoparticle interfacial layer on surface of μAl, which facilitates oxygen transport through channels established in layer, resulting superior heat release catalytic properties [Quaternary]/μAl. The experimental results show that reduces agglomeration between greatly improves efficiency powder. As result, exothermic decomposition peak μAl increased almost 400 °C. addition, exhibited excellent activity stability thermal an ammonium perchlorate/molecular perovskite energy (AP/DAP-4), reducing temperature AP/DAP-4 approximately 80 °C activation to 228.1 kJ/mol. Combustion experiments revealed [Quaternary]/μAl+AP/DAP-4 burned well, highest combustion pressure boost rate flame 2002 On basis these phenomena results, mechanism fuels is proposed. conclusion, improvement overall performance fuel/oxidizer composites formation layers substitution reactions expected have wider application solid propellants.

Язык: Английский

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Efficiently Constructed Core‐Shelled Structured AP‐Based Composites with Excellent Balance of High Energy Release and Low Sensitivity

Small, Год журнала: 2025, Номер unknown

Опубликована: Март 27, 2025

Abstract Ammonium perchlorate (AP) plays an important role in solid propellants because of its high specific impulse, energy density and low cost. However, the excellent performance cannot conceal many shortcomings AP, problems non‐concentrated exothermic, sensitivity hygroscopicity still seriously impede application propellants. In this study, solvent evaporation method is used to directionally modify order cupric oxide (CuO) fluororubber (F 2603 ) shell layers so as obtain AP‐based composites with different core‐shell structures. The interlayer binding energies structures are explored by theoretical calculations, it demonstrated that have stability. addition, CuO valence‐band holes not only reduces peak temperature decomposition AP (440.4 354.5 °C), but also enhances combustion properties undergoing thermite reaction Al. Furthermore, hydrophobicity barrier F greatly strengthened mechanical reduced their sensitivity. summary, core‐shelled prepared strategy possessed 5‐in‐1 properties, which provided a new idea for targeted modulation energetic materials.

Язык: Английский

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Encapsulation of micron-scale aluminum with pluralistic magnetic metallic nanoparticles and its combustion performance

FirePhysChem, Год журнала: 2025, Номер unknown

Опубликована: Апрель 1, 2025

Язык: Английский

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High-Throughput Fabrication of B/Fe2O3/F2603 MIC composite microspheres via microchannel technology

Chemical Engineering Journal, Год журнала: 2024, Номер unknown, С. 158481 - 158481

Опубликована: Дек. 1, 2024

Язык: Английский

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Enhanced combustion performance of Al Zn alloys with property optimization inspired by “two-way tunneling” strategy

Surface and Coatings Technology, Год журнала: 2024, Номер 494, С. 131444 - 131444

Опубликована: Окт. 1, 2024

Язык: Английский

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High-Throughput Fabrication of B/Fe2o3/F2603 Mic Composite Microspheres with Excellent Comprehensive Performance Via Microchannel Technology

Опубликована: Янв. 1, 2024

Язык: Английский

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