Hybrid Ceramic Tile Armor with Molten Metal Infiltration
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Solution Overview
Problem
Existing lightweight armor systems face challenges in achieving multi-hit capability with sufficient mechanical strength, ballistic shock resistance, and bond strength at layer interfaces, particularly in reducing spallation caused by projectile impact.
Innovation Solution
A hybrid ceramic tile panel system is developed, comprising dense ceramic plates encapsulated in solid metal or metal matrix composites with cast-in energy-absorbing post structures, reinforced with metal alloy wires or rods, and bonded to an aluminum backing plate using a molten metal infiltration process, which enhances energy dissipation and structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single layer of hard and brittle ceramic material is used, then the armor system is simple in structure, but it cannot effectively stop high velocity projectiles and suffers from spallation issues
Solution Approach 1:
The armor system is divided into multiple functional layers: a hard ceramic impact layer for projectile deflection, a graded ceramic matrix composite layer for energy absorption and spallation reduction, and a ductile metal backup layer for catching fragments. This segmentation allows each layer to perform its specific function optimally, resolving the contradiction between structural simplicity and ballistic effectiveness.
Solution Approach 2:
The invention uses composite materials including ceramic matrix composites with metallic particles and metal-ceramic hybrid structures. The graded ceramic matrix composite combines brittle ceramic with ductile metal particles, creating a material that exhibits both hardness for impact resistance and energy absorption capability, thereby improving reliability without excessive complexity.
2Reliability
If an energy absorbing backup layer is added to the ceramic material, then the armor system can stop higher velocity projectiles, but spallation of the ceramic is not significantly reduced
Solution Approach 1:
The ceramic matrix composite has a gradient composition where the concentration of ductile metal particles varies through the thickness of the layer. The region closer to the ceramic impact layer has a different particle concentration than the region near the metal backup layer, creating local quality variations that simultaneously address both projectile stopping and spallation reduction through tailored energy absorption characteristics.
Solution Approach 2:
The invention converts the potentially harmful spallation effect into a beneficial energy absorption mechanism. The graded ceramic matrix composite is designed so that controlled spallation occurs in a manner that absorbs projectile kinetic energy rather than allowing uncontrolled fragmentation, thereby reducing the harmful effects while maintaining protective capability.
3Reliability
If a graded ceramic material with increasing metallic particle concentration is used, then energy absorbing capacity is improved, but manufacturing complexity and bond strength at interfaces become problematic
Solution Approach 1:
The invention merges the ceramic matrix composite layer with the metal backup layer into an integrated hybrid structure where the two materials are metallurgically bonded. This combining eliminates the need for separate assembly operations and adhesive bonding, thereby improving ease of manufacture while maintaining the energy absorbing benefits of the graded ceramic structure.
Solution Approach 2:
The metal-ceramic hybrid composite structure creates a unified material system where metallic particles are embedded within the ceramic matrix, and the outer surface is metallized. This composite approach allows for improved energy absorption while simplifying manufacturing by creating a monolithic structure that can be produced in one process rather than assembled from multiple layers.
4Reliability
If multiple dense ceramic plates are arranged in arrays within a hybrid tile, then ballistic shock resistance is improved, but the complexity of encapsulation and attachment structures increases
Solution Approach 1:
The multiple ceramic plates are encapsulated within a single continuous metal matrix composite that provides unified structural support and shock distribution. The metal matrix acts as a bonding medium that holds the ceramic plates together and transfers ballistic shock loads across the entire tile structure, thereby improving ballistic shock resistance without requiring complex individual encapsulation for each plate.
Solution Approach 2:
The metal matrix composite enveloping structure serves multiple functions simultaneously: it provides structural support for the ceramic plate array, distributes ballistic shock loads, facilitates attachment to backing plates, and protects the ceramic plates from environmental damage. This multi-functionality reduces the need for separate components, thereby managing complexity while maintaining high ballistic performance.
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 system effectively reduces spallation and improves ballistic resistance by dissipating energy upon projectile impact while maintaining structural integrity, enabling effective attachment to a backing plate and enhanced protection against multiple hits.
Implementation Method 1
The mold cavity is next infiltrated under pressure with molten metal allowing for metal to penetrate into any open porosity of the dense ceramic plate layer surfaces and spacer open porosity and through or around areas within the mold cavity that contain open spaces, thereby binding the layers together, and encapsulating the dense ceramic plates and spacers into an integrated tile panel.
Implementation Method 2
The mold cavity is next infiltrated under pressure with molten metal allowing for metal to penetrate into any open porosity of the dense ceramic plate layer surfaces and spacer open porosity
Data Source
AI summary
A lightweight armor system may comprise multiple reinforcement materials layered within a single metal matrix casting. These reinforcement materials may comprise ceramics, metals, or other composites with microstructures that may be porous, dense, fibrous or particulate. Various geometries of flat plates, and combinations of reinforcement materials may be utilized. These reinforcement materials are infiltrated with liquid metal, the liquid metal solidifies within the material layers of open porosity forming a dense hermetic metal matrix composite armor in the desired product shape geometry. The metal infiltration process allows for metal to penetrate throughout the overall structure extending from one layer to the next, thereby binding the layers together and integrating the structure.