Layered Energetic Material with Multiple Ignition Points
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Solution Overview
Problem
Existing energetic materials, such as thermite, do not effectively utilize a layered structure with multiple individually controlled ignition points, limiting their applications in terms of charge and blast shaping, ignition timing, and pressure curve control.
Innovation Solution
A layered energetic material structure comprising alternating metal oxide and reducing metal layers, combined with a gas-producing layer and an ignition system featuring multiple ignition points, allowing for controlled ignition timing and sequence through electrical or fuse-based systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional high explosives are used, then explosive power is achieved, but control over charge shaping and blast patterns is limited
Solution Approach 1:
The energetic material is divided into multiple alternating layers of metal oxide and reducing metal, creating distinct functional zones within the material structure. This segmentation allows different regions to be selectively ignited and controlled, enabling precise charge shaping and blast pattern control while maintaining overall structural integrity
Solution Approach 2:
Different layers within the energetic material are designed with specific local properties - metal oxide layers provide oxidizing function while reducing metal layers provide fuel function. This local differentiation of material properties enables controlled reaction propagation and precise blast shaping without requiring complex external control systems
2Ease of operation
If single ignition point is used, then simplicity is maintained, but ignition timing control is limited
Solution Approach 1:
The ignition system is segmented into multiple independent ignition points distributed across different layers of the energetic material. Each ignition point can be activated independently or in sequence, providing precise timing control for complex blasting operations while using simple individual ignition components
Solution Approach 2:
Multiple ignition points are pre-positioned within the layered structure at strategic locations. This preliminary placement allows for pre-planned ignition sequences to be executed by simply activating the appropriate ignition points in the desired order, achieving complex timing control without complex real-time control systems
3Productivity
If layered structure is used, then reaction speed is increased, but manufacturing precision requirements increase
Solution Approach 1:
The layer thicknesses of metal oxide and reducing metal are optimized to specific parameter ranges that balance reaction speed with manufacturability. By establishing standardized thickness parameters within practical manufacturing tolerances, the structure achieves high reaction speeds without requiring extreme precision that would complicate manufacturing
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables precise control over ignition timing and sequence, maximizing energy density and blast pattern shaping, while maintaining stability for safe handling and neutralization.
Implementation Method 1
A thermite reaction occurs between a metal oxide and a reducing metal
Implementation Method 2
The ignition system has an ignition point corresponding to each ignition signal conductor
Implementation Method 3
allowing for controlled ignition timing and sequence through electrical or fuse-based systems
Data Source
AI summary
An energetic material having thin, alternating layers of metal oxide and reducing metal is provided. The energetic material may be provided in the form of a sheet, foil, cylinder, or other convenient structure. A method of making the energetic material resists the formation of oxide on the surface of the reducing metal, allowing the use of multiple thin layers of metal oxide and reducing metal for maximum contact between the reactants, without significant lost volume due to oxide formation. An ignition system for the energetic material includes multiple ignition points, as well as a means for controlling the timing and sequence of activation of the individual ignition points. A gas producing layer is also provided to increase pressure.