Titanium boride
View Patent ↗A titanium metal or a titanium alloy having submicron titanium boride substantially uniformly dispersed therein and a method of making same is disclosed. Ti power of Ti alloy powder has dispersed within the particles forming the powder titanum boride which is other than whisker-shaped or spherical substantially uniformly dispersed therein.
1. A method of forming a titanium metal powder, the method comprising:
subsurfacely introducing a vapor mixture of titanium tetrachloride and a boron halide into a flowing stream of a liquid metal comprising an alkali metal, an alkaline earth metal, or a mixture thereof, to produce the reaction products comprising titanium metal powder having submicron titanium boride substantially uniformly dispersed therein, wherein the liquid metal is present in a sufficient amount to (i) reduce the vapor mixture to form the reaction products, and (ii) maintain the reaction products below a sintering temperature of the titanium metal powder; and
recovering the titanium metal powder from the reaction products.
2. The method of claim 1 wherein the titanium metal powder comprises boron in an amount greater than 0% by weight up to 3.2% by weight of the titanium metal powder.
3. The method of claim 1 wherein the titanium metal powder comprises boron in an amount greater than 0% by weight up to about 4% by weight of the titanium metal powder.
4. The method of claim 1 , wherein the titanium boride is other than whisker-shaped or spherical shaped.
5. The method of claim 1 , further comprising forming the titanium metal powder into a consolidated powder.
6. The method of claim 1 , further comprising sintering the titanium metal powder to form a sintered powder.
7. The method of claim 1 , wherein the titanium boride is principally in the form of TiB.
8. The method of claim 1 , wherein the alkali metal is at least one of sodium and potassium.
9. The method of claim 1 , wherein the alkaline earth metal is at least one of magnesium or calcium.
10. The method of claim 1 , wherein the vapor mixture is introduced into the flowing stream of liquid metal at at least sonic velocity.
11. The method of claim 1 , wherein the boron halide substantially comprises BCl 3 .
12. The method of claim 1 , wherein at least half of the particles forming the titanium metal powder contain titanium boride.
13. The method of claim 1 , wherein the titanium boride is dispersed within substantially all of the particles of the titanium metal powder.
14. The method of claim 1 , further comprising subsurfacely introducing at least one of Al and V to form a titanium alloy of at least one of Al and V.
15. The method of claim 1 , comprising the step of consolidating the titanium metal powder into a solid object.
16. A method of forming a titanium metal powder, the method comprising:
subsurfacely introducing a vapor mixture of titanium tetrachloride and a boron halide into a flowing stream of a liquid metal comprising an alkali metal, an alkaline earth metal, or a mixture thereof, to produce the reaction products comprising titanium metal powder having submicron titanium boride substantially uniformly dispersed therein, wherein the titanium metal powder comprises boron in an amount greater than 0% by weight up to about 4% by weight of the titanium metal powder, and wherein the liquid metal is present in a sufficient amount to (i) reduce the vapor mixture to form the reaction products, and (ii) maintain the reaction products below a sintering temperature of the titanium metal powder; and
recovering the titanium metal powder from the reaction products.
17. The method of claim 16 wherein the titanium metal powder comprises boron in an amount greater than 0% by weight up to 3.2% by weight of the titanium metal powder.
18. The method of claim 16 , wherein the titanium boride is other than whisker-shaped or spherical shaped.
19. The method of claim 16 , wherein the titanium boride is principally in the form of TiB.
20. The method of claim 16 , wherein the boron halide substantially comprises BCl 3 .
21. The method of claim 16 , further comprising subsurfacely introducing at least one of Al and V to form a titanium alloy of at least one of Al and V.