Composite system
OwnerRobert G. LEEinventor
Life of this patent
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Abstract
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.
Claims80
A method of making a composite system, the method comprising:
- forming a mixture comprising
- 12.5 wt. % to 25 wt. % of a NiTiAl master alloy powder,
- 32 wt. % to 55 wt. % of a hard powder,
- with the balance being titanium powder;
- compacting the mixture to form a green compact;
- and
- sintering the compact.
The method of claim wherein the titanium powder consists essentially of titanium sponge granules, a powder of titanium that has been made from previously melted or partially melted titanium made by the hydride dehydride process or processes to make spherical powders, or a mixture thereof.
A method for forming a green compact, the method comprising:
- providing a mixture comprising
- (a) 12.5 wt. % to 25 wt. % of a powder comprising
- 24 wt. % to 28 wt. % titanium,
- 7 wt. % to 12 wt. % aluminum,
- 0 wt. % to 0.10 wt. % carbon,
- 0 wt. % to 4.5 wt. % iron,
- 0 wt. % to 4 wt. % silicon,
- with the balance being nickel and trace elements,
- (b) 32 wt. % to 55 wt. % of a hard powder, and
- (c) titanium powder in an amount sufficient to impart green strength
- to a green compact formed from the mixture;
- and
- compacting the mixture to form a green compact.
A TiC composite system that is a solid body comprising:
- 71 wt. % to 84 wt. % titanium,
- 6.5 wt. % to 16 wt. % nickel,
- 1 wt. % to 3 wt. % aluminum,
- 0 wt. % to 1 wt. % iron,
- 0 wt. % to 14 wt. % silicon,
- 6 wt. % to 11 wt. % carbon, and
- 0 wt. % to 1.5 wt. % other elements.
A mixture of materials to be used in the production of a green compact for sintering comprising to form a TiC composite system, the mixture comprising:
- 71 wt. % to 84 wt. % titanium,
- 6.5 wt. % to 16 wt. % nickel,
- 1 wt. % to 3 wt. % aluminum,
- 0 wt. % to 1 wt. % iron,
- 0 wt. % to 14 wt. % silicon,
- 6 wt. % to 11 wt. % carbon, and
- 0 wt. % to 1.5 wt. % other elements.
A mixture of materials to be used in the production of a green compact for sintering comprising:
- a) 12.5 wt. % to 25 wt. % of a powder comprising
- 24 wt % to 28 wt. % titanium
- 7 wt. % to 12 wt. % aluminum
- 0 wt. % to 0.10 wt. % carbon
- 0 wt. % to 4.5 wt. % iron
- 0 wt. % to 4 wt. % silicon
- with the balance being nickel and trace elements;
- and
- b) 32 wt % to 55 wt % of a hard powder,
- with the balance being titanium powder.
A green compact comprising:
- a) 12.5 wt. % to 25 wt. % of a powder comprising
- 24 wt % to 28 wt. % titanium
- 7 wt. % to 12 wt. % aluminum
- 0 wt. % to 0.10 wt. % carbon
- 0 wt. % to 4.5 wt. % iron
- 0 wt. % to 4 wt. % silicon
- with the balance being nickel and trace elements,
- b) 32 wt % to 55 wt % of a hard powder, and
- c) titanium powder in an amount sufficient to impart sufficient green strength to the green compact.
A method for forming a TiC composite system, the method comprising partially melting a mixture of materials comprising:
- 71 wt. % to 84 wt. % titanium,
- 6.5 wt. % to 16 wt. % nickel,
- 1 wt. % to 3 wt. % aluminum,
- 0 wt. % to 1 wt. % iron,
- 0 wt. % to 14 wt. % silicon,
- 6 wt. % to 11 wt. % carbon, and
- 0 wt. % to 1.5 wt. % other elements,
- wherein 32 wt % to 55 wt % of the mixture is a hard powder;
- and
- cooling the partially melted mixture to form a solid body of a TiC composite system.
Dependencies are inferred from the claim text.