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 . A crucible for growing crystals, the crucible being formed from Molybdenum and Rhenium.
2 . A crucible according to claim 1 wherein the rhenium comprises about 5%-20% by weight.
3 . A crucible for growing crystals, the crucible being formed from a metal selected from Group V of the Periodic Table of the Elements.
4 . A crucible according to claim 3 wherein the metal is Tantalum or alloys thereof.
5 . A crucible according to claim 3 wherein the metal is Niobium or alloys thereof.
6 . A crucible according to claim 5 wherein the metal is Niobium C-103 or alloys thereof.
7 . A crucible according to claim 3 wherein the metal is Vanadium or alloys thereof.
8 . A crucible according to claim 3 wherein the metal further comprises at least one of Silicon and Thorium.
9 . A crucible according to claim 3 wherein the crucible is carbonized prior to use.
10 . A crucible according to claim 9 wherein the crucible is carbonized by annealing the crucible in a carbon-containing atmosphere.
11 . 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.
12 . A crucible according to claim 11 , wherein the body is formed out of a nickel-iron alloy.
13 . A crucible according to claim 12 , wherein the nickel-iron alloy comprises at least one from the group consisting of NILO, Invar, Kovar and NILOMAG.
14 . A crucible according to claim 11 , wherein the body is formed by at least one of deep drawing, flowforming, spinning and hydroforming.
15 . A method for forming a crucible for growing crystals, the method comprising the steps of:
preheating a preform blank formed out of molybdenum or a molybdenum alloy; 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.