TiC Composite Armor Binder System for Weight Reduction
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Solution Overview
Problem
Historically, TiC alloys used in ballistic armor are brittle and have high densities due to the metals used for binding, which are disadvantageous for weight-sensitive applications.
Innovation Solution
A composite system is developed using TiC powder combined with a green binder system of titanium sponge granules and a binder system comprising titanium, nickel, and aluminum, which forms a multiphase alloy with a lower density and improved toughness, allowing for the creation of layered composite armor structures with enhanced attachment configurations and ballistics properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional heavy metals (nickel, molybdenum, niobium, tungsten) are used as binders in TiC alloys, then the alloy achieves sufficient binding strength and hardness, but the density increases to 6 g/cc or higher
Solution Approach 1:
The invention changes the chemical composition parameters of the binder system by incorporating aluminum and titanium alongside nickel, creating a multi-element binder system that achieves adequate binding strength with reduced density compared to traditional single-element heavy metal binders
Solution Approach 2:
The invention uses a composite binder system comprising multiple elements (nickel, aluminum, titanium) that work together to provide binding strength while reducing overall density. The aluminum and titanium components contribute to strength while being lighter than traditional binders like molybdenum and tungsten
2Strength
If very fine TiC particles (under 20 microns, substantially under 6 microns) are used in powder metallurgy, then the alloy achieves high hardness, but the brittleness increases
Solution Approach 1:
The invention changes the particle size distribution parameters by incorporating a broader range of particle sizes including coarser particles alongside fine particles. This size distribution modification maintains hardness from the fine particles while the coarser particles and optimized binder network reduce brittleness
Solution Approach 2:
The invention creates a composite microstructure where fine TiC particles provide hardness and coarser particles or interparticle binder networks provide toughness. The multi-element binder system also forms a more ductile matrix that reduces overall brittleness
3Strength
If high density TiC alloys (6 g/cc or higher) are used for ballistic armor, then the material achieves sufficient strength and hardness, but the weight becomes disadvantageous for portability
Solution Approach 1:
The invention changes the density parameter of the alloy by substituting some heavy binder metals with lighter elements like aluminum and titanium. This composition modification reduces density while maintaining ballistic performance through the optimized multi-element binder system and particle distribution
Solution Approach 2:
The invention creates a composite alloy system where TiC particles are embedded in a lighter multi-element binder matrix. This composite structure achieves ballistic performance through the hard TiC particles while the lighter binder system reduces overall density and weight
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 composite system achieves superior toughness and reduced weight, effectively absorbing energy and resisting cracking, making it more suitable for ballistic armor and other applications.
Implementation Method 1
the nickel forms lower melting point eutectoid-like structures when combined with the titanium of the green binder system
Implementation Method 2
The composite system achieves superior toughness and reduced weight, effectively absorbing energy and resisting cracking
Implementation Method 3
which then are compressed and sintered
Data Source
AI summary
A multiphase composite system is made by binding hard particles, such as TiC particles, of various sizes with a mixture of titanium powder and aluminum, nickel, and titanium in a master alloy or as elemental materials to produce a composite system that has advantageous energy absorbing characteristics. The multiple phases of this composite system include an aggregate phase of hard particles bound with a matrix phase. The matrix phase has at least two phases with varying amounts of aluminum, nickel, and titanium. The matrix phase forms a bond with the hard particles and has varying degrees of hard and ductile phases. The composite system may be used alone or bonded to other materials such as bodies of titanium or ceramic in the manufacture of ballistic armor tiles.