Fuzzy interface layer for thermite and primer made from thermite with fuzzy layer

WO2025085106A3PCT designated stage expired Publication Date: 2025-06-05SPECTRE PRIMER TECHNOLOGIES INC
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Patent Information

Application Number
PCT/US2024/026858
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-04-29
Filing Date
2024-04-29
Publication Date
2025-06-05

AI Technical Summary

Technical Problem

Existing primers for firearms and munitions are toxic due to the use of lead azide and lead styphnate, and their manufacturing processes are labor-intensive and costly, making them difficult to produce with quality control.

Method used

A layered thermite composite with a fuzzy interface layer is developed, comprising alternating layers of metal oxide and reducing metal deposited on a substrate, with the fuzzy interface layer containing reducing metal, reducing metal oxide, and metal oxide partially mixed together.

Benefits of technology

The solution provides a primer that is non-toxic, easily manufactured through automated processes, and maintains high energy density and susceptibility to mechanical ignition, ensuring reliable ignition of propellants and explosives.

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Abstract

A layered thermite composite includes alternating layers of metal oxide and reducing metal deposited upon a substrate. A fuzzy interface layer between each metal oxide layer and reducing metal layer includes reducing metal, reducing metal oxide, and metal oxide at least partially intermixed therein. The fuzzy interface layer forms while moving between chambers in a multi-chamber deposition process which minimizes exposure of the reducing metal to oxygen while moving between chambers. The fuzzy interface layer is not expected to grow in thickness after deposition. The combination of the relative thinness of the fuzzy interface layer as well as the presence of reactants as well as reducing metal oxide maintains the sensitivity of the layered thermit structure to mechanical ignition if the structure is used within a primer.
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Citation Information

Patent Citations

  • Layered energetic material having multiple ignition points

    US10254090B1

  • Primer for Firearms and Other Munitions

    US20160102030A1

  • Primer for Firearms and Other Munitions

    US20220260353A1