Related Experiment Video
Updated: Mar 19, 2026
09:50
Preparation and Reactivity of Gasless Nanostructured Energetic Materials
Published on: April 2, 2015
10.7K
Intermetallic reaction and eutectic transitions tune the reactivity in core-shell Mg/Ni nanoparticles
Mahbub Chowdhury1, Lei Yang1, Brandon Wagner2
1Departments of Chemical Engineering and Materials Science, University of California, Riverside, California 92521, USA. mrz@engr.ucr.edu.
Physical Chemistry Chemical Physics : PCCP
|March 18, 2026
Summary
Researchers tuned nickel-coated magnesium nanoparticles to enhance energetic materials. Adjusting the nickel shell thickness lowered ignition temperatures by up to 200 °C, improving safety and energy release control.
Area of Science:
- Materials Science
- Nanotechnology
- Chemical Engineering
Background:
- Energetic materials require interface tuning for performance and safety.
- Core-shell architectures can trigger pre-ignition reactions in metallic fuels.
Purpose of the Study:
- Investigate dynamic interfacial reactions and diffusion in nickel-coated magnesium nanoparticles.
- Understand how core-shell structure affects energetic material properties.
- Develop strategies for safer energetic materials with controlled energy release.
Main Methods:
- Synthesized nickel-coated magnesium nanoparticles.
- Utilized in situ transmission electron microscopy (TEM) for real-time observation.
- Employed ex situ reactivity characterization.
- Analyzed interfacial reactions and diffusion pathways under controlled heating.
Main Results:
- Observed outward diffusion of magnesium (Mg) into the nickel (Ni) shell, forming Mg2Ni.
- Exothermic alloying rapidly increased particle temperature and initiated eutectic melting.
- Achieved accelerated Mg transport at lower temperatures compared to uncoated Mg.
- Reduced ignition temperature by up to ~200 °C by tuning Ni-shell thickness.
Conclusions:
- Core-shell architecture significantly influences energetic material behavior.
- Tuning shell thickness offers a method to control ignition temperature and enhance safety.
- Provides insights for designing advanced energetic materials with tailored energy release.
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