Patent ID: 11925984
Assignee: PLANSEE SE
Field: Materials, metallurgy (Chemistry)
Classification: CPC B  C | IPC B  C

Claim 11:
12. A process for producing a sintered molybdenum part, the process comprising the following steps:
producing the sintered molybdenum part having a molybdenum content of ≥99.93% by weight, a boron content “B” in a range of 5≤“B”≤45 ppmw and a carbon content “C” in a range of 5≤“C”≤30 ppmw, a total content “BaC” of carbon and boron in a range of 15 ppmw≤“BaC”≤50 ppmw, an oxygen content “O” in a range 3 ppmw≤“O”≤20 ppmw, a maximum tungsten content of ≤330 ppmw, a maximum proportion of other impurities of ≤300 ppmw and a maximum proportion of additives of Zr, Hf, Ti, V and Al of ≤50 ppmw, by:
a. pressing a powder mixture composed of molybdenum powder and boron-containing and carbon-containing powders to give a green body; and
b. sintering the green body in an atmosphere protecting against oxidation for a residence time of at least 45 minutes at temperatures in a range of 1600° C.-2200° C.