| 摘要 |
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. |
| 主权项 |
1. A method for forming a composite system, the method comprising:
forming a titanium-based alloy system for containing a hard powder by substituting one or more elements, selected from the group consisting of titanium and aluminum, for at least a portion of one or more heavy elements, selected from the group consisting of nickel, molybdenum, niobium and tungsten, of a known alloy system for forming a composite system containing carbide; forming a composite system precursor powder that comprises a powder of the titanium-based alloy system mixed with a powder of at least one carbide, at least one nitride, or a mixture thereof, 32 wt. % to 55% wt. % of the composite system precursor powder being a powder of at least one carbide, at least one nitride, or a mixture thereof, and 20 wt. % to 54% wt. % of the composite system precursor powder being titanium powder; shaping a volume of the composite system precursor powder to form a green compact; heating the green compact to partially melt the composite system precursor powder; and cooling the partially melted composite system precursor powder to form a body of a composite system comprising powder of at least one carbide, at least one nitride, or a mixture thereof, the titanium and/or aluminum being substituted in an amount sufficient that the composite system containing powder of at least one carbide, at least one nitride, or a mixture thereof (a) has a density not less than 3.63 g/cc and not more than 5.0 g/cc, (b) is 6 wt. % to 17 wt. % nickel, and (c) exhibits branched cracking upon cracking due to impact with a ballistic projectile. |
