Metallic Encapsulation of Ceramic Armor via Diffusion Bonding
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Solution Overview
Problem
Current metallic encapsulation methods for ceramic armor are costly, limited in shape-forming capability, and prone to fracturing due to high thermal expansion differences, making them unsuitable for large-scale manufacturing and complex geometries, while also lacking in durability and multiple hit resistance.
Innovation Solution
The method involves diffusion bonding of metal layers using sheet metal forming and isostatic densification to create a robust, conformal metallic container around ceramic tiles, allowing for reproducible and cost-effective production of armor with tailored interfacial bond strength and corrosion resistance, suitable for complex shapes and multiple hits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional metallic encapsulation methods are used, then ceramic tiles can be encapsulated, but the process is costly and limited in shape-forming capability
Solution Approach 1:
The invention changes the physical state and processing parameters of metal powders by using plasma spray deposition at high temperatures, allowing the metal to transform from powder to dense encapsulating layer, thereby achieving complex shapes that were not possible with conventional methods
Solution Approach 2:
The invention replaces conventional mechanical encapsulation methods (such as shrink-fitting, welding, or mechanical assembly) with a thermal spray process that deposits molten or semi-molten metal directly onto the ceramic surface, eliminating the need for complex mechanical forming tools and enabling cost-effective production of complex geometries
2Ease of manufacture
If high thermal expansion metal encapsulation is used, then the ceramic can be encapsulated, but fracturing occurs due to thermal expansion differences
Solution Approach 1:
The invention introduces an intermediate bonding layer or transition zone between the metal encapsulation and ceramic core, which acts as a buffer to accommodate differential thermal expansion and reduce stress concentration, thereby preventing fracturing while maintaining encapsulation integrity
Solution Approach 2:
The invention creates a gradient in material properties or layer composition at the metal-ceramic interface, where the local structure is optimized to handle thermal stress differently from the bulk materials, allowing the interface to absorb expansion differences without causing fracture
3Reliability
If ceramic armor is used, then ballistic efficiency is improved, but durability and multiple hit resistance are reduced
Solution Approach 1:
The invention creates a composite structure combining ceramic core with metal encapsulation layer, where the ceramic provides ballistic efficiency and the metal provides durability and multiple-hit resistance, achieving a synergistic effect that overcomes the limitations of pure ceramic armor
4Reliability
If conventional encapsulation methods are used, then ceramic tiles can be protected, but large-scale manufacturing is not feasible
Solution Approach 1:
The invention replaces labor-intensive, tool-based mechanical encapsulation processes with an automated plasma spray deposition system that can continuously coat ceramic tiles, dramatically increasing production capacity and enabling large-scale manufacturing while maintaining protection effectiveness
Solution Approach 2:
The invention modifies the processing parameters to enable rapid deposition and cooling cycles suitable for high-volume production, adjusting temperature, spray rate, and substrate movement to achieve both quality protection and manufacturing scalability
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
The solution enhances the multiple hit capability and durability of ceramic armor, maintains ballistic efficiency, and reduces costs by enabling large-scale manufacturing of metallically encapsulated ceramic armor with improved structural integrity and corrosion resistance.
Implementation Method 1
the metallic encapsulating layer has been metallurgically bonded to the underlying ceramic tile via diffusion bonding
Implementation Method 2
The ceramic tile has been hot pressed to full density
Implementation Method 3
The conformal sheet metal container has been fabricated from sheet or plate stock via any suitable plastic forming or metallurgical forming technique
Data Source
AI summary
A method for the manufacture through diffusion bonding of metallically encapsulated ceramic armor providing enhanced ballistic efficiency and physical durability.