초록 ▼

A Mo—Si—B alloy has a matrix of Mo or a Mo solid solution, wherein 25% by volume to 90% by volume of molybdenum silicide and molybdenum boron silicide, optionally together with molybdenum boride, are incorporated. The alloy also contains 0.1-5% by volume of one or more oxides or mixed

A Mo—Si—B alloy has a matrix of Mo or a Mo solid solution, wherein 25% by volume to 90% by volume of molybdenum silicide and molybdenum boron silicide, optionally together with molybdenum boride, are incorporated. The alloy also contains 0.1-5% by volume of one or more oxides or mixed oxides with a vapor pressure at 1500° C. of <5×10−2 bar in finely dispersed form. The oxide addition not only improves the hot strength but also greatly improves the ductility.

대표청구항 ▼

I claim: 1. A Mo—Si—B alloy, comprising: intermetallic phases, molybdenum silicide and molybdenum boron silicide, and an optional component of molybdenum boride, with a total content of intermetallic phase constituents amounting to 25 to 90% by volume and a proportion of further micro

I claim: 1. A Mo—Si—B alloy, comprising: intermetallic phases, molybdenum silicide and molybdenum boron silicide, and an optional component of molybdenum boride, with a total content of intermetallic phase constituents amounting to 25 to 90% by volume and a proportion of further microstructural constituents amounting to less than 5% by volume; 2-6% by weight Si, 0.5-2% by weight B, 0.2-1% by volume of Y2O3, and a remainder of molybdenum or molybdenum solid solution. 2. The Mo—Si—B alloy according to claim 1, wherein said oxides or mixed oxides have a mean particle size of <5 μm. 3. The Mo—Si—B alloy according to claim 1, wherein a total content of molybdenum silicide and molybdenum boron silicide amounts to 40-80% by volume. 4. The Mo—Si—B alloy according to claim 1, wherein said molybdenum solid solution contains one or more metals selected from the group consisting of Re, Ti, Zr, Hf, V, Nb, Ta, Cr, and Al. 5. A Mo—Si—B alloy, comprising: intermetallic phases, molybdenum silicide and molybdenum boron silicide, and an optional component of molybdenum boride, with a total content of intermetallic phase constituents amounting to 25 to 90% by volume and a proportion of further microstructural constituents amounting to less than 5% by volume; 2-6% by weight Si, 0.5-2% by weight B, 0.2-1% by volume of Y2O3, 5-10% by weight Nb, remainder molybdenum.