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Abstract

A method for producing a refractory metal foil from a workpiece fabricated of a refractory metal material includes the step of heat treating the workpiece for a first time period of approximately 1.5 hours at a first temperature of approximately 2,650.degree. Fahrenheit and subsequently for a second time period of approximately 2.0 hours at a second temperature of approximately 2,200.degree. Fahrenheit. The next step is forming the workpiece into a sheet of refractory metal material having a first sheet thickness of approximately one inch. The next step is heat treating the sheet of refractory metal material for a third time period of approximately 2 hours at a third temperature of approximately 2,200.degree. Fahrenheit. The next step is compressing the sheet of refractory metal material into a second sheet thickness of approximately 0.040 inches. The next step is annealing the sheet of refractory metal material for a first annealing time period for approximately 2.0 hours at a first annealing temperature of approximately 2,200.degree. Fahrenheit. The next step is compressing the sheet of refractory metal material into a third sheet thickness of approximately 0.010 inches. The next step is annealing the sheet of refractory metal material for a second annealing time period of approximately 3.0 hours at a second annealing temperature of approximately 2,100.degree. Fahrenheit. The final step is compressing the sheet of refractory metal material into a fourth sheet thickness of approximately 0.0010 inches thereby forming a foil of refractory metal material.

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