CRUCIBLES MADE WITH THE COLD FORM PROCESS
A crucible for growing crystals, the crucible being formed from Molybdenum and Rhenium. A crucible for growing crystals, the crucible being formed from a metal selected from Group V of the Periodic Table of the Elements. A crucible for growing crystals, the crucible comprising a body and a layer formed on at least a portion of the body, the layer being formed out of Molybdenum.
1 .- 15 . (canceled)
16 . A method for forming a crucible for growing crystals, the method comprising the steps of:
preheating a preform blank formed of a material selected from molybdenum and a molybdenum alloy to a temperature greater than a ductile-brittle transition temperature of the material and below a recrystallization temperature of the material; and
flowforming the preform blank into the shape of a crucible, wherein flowforming is performed at a temperature below the recrystallization temperature of the material.
17 . A method according to claim 16 , wherein the material is a molybdenum alloy comprising molybdenum and a metal selected from Group V of the Periodic Table of the Elements.
18 . A method according to claim 17 , wherein the metal selected from Group V of the Periodic Table of the Elements is tantalum.
19 . A method according to claim 17 , wherein the molybdenum alloy further comprises at least one of silicon and thorium.
20 . A method according to claim 16 , further comprising carbonizing the crucible.
21 . A method according to claim 20 , wherein carbonizing the crucible comprises heating the crucible in a carbon-containing atmosphere.
22 . A method for forming a crucible for growing crystals, the method comprising the steps of:
preheating a preform blank formed of a molybdenum alloy comprising molybdenum and a metal selected from Group V of the Periodic Table of the Elements to a temperature greater than a ductile-brittle transition temperature of the material and below a recrystallization temperature of the material;
flowforming the preform blank into the shape of a crucible, wherein flowforming is performed at a temperature below the recrystallization temperature of the material; and
carbonizing the crucible.
23 . The method of claim 22 , wherein the molybdenum alloy further comprises at least one of silicon and thorium.
24 . The method of claim 22 , wherein carbonizing the crucible comprises heating the crucible in a carbon-containing atmosphere.