Molybdenum-silicon-boron alloy and method for producing same, and component
The use of a specific molybdenum-silicon-boron alloy and a particular production process in which powder is used makes it possible to achieve components which have a particular fiber-matrix structure and can be used for high-temperature applications and can also be produced inexpensively.
1. An alloy comprising a composition Mo-(x)Si-(y)B-(z)Zr, wherein:
x=13 at % to 18 at %,
y=8 at % to 12 at %, and
z=0.5 at % to 2 at %.
2. An alloy consisting essentially of the composition as claimed in claim 1 .
3. The alloy as claimed in claim 1 , consisting essentially of Mo, Si, B and Zr and formed by a selective laser melting process such that the alloy comprises a fiber-matrix structure in which individual phases are present as a Mo ss /Mo 5 SiB 2 /Mo 3 Si structure.
4. A component comprising the alloy as claimed in claim 1 , wherein the alloy further comprises a fiber-matrix structure formed by an energy beam melting process.
5. A process for producing a component composed of the alloy of claim 1 , the process comprising applying powder comprising Mo, Si, B and Zr with a selective energy beam melting process.
6. The process as claimed in claim 5 , wherein at least 80%, of particles of the powder have respective sizes in a range from 10 μm to 60 μm.
7. The process as claimed in claim 5 , wherein the powder has been gas-atomized or milled.
8. The process as claimed in claim 5 , wherein the selective energy beam melting process is controlled to achieve a temperature gradient effective to form a fiber-matrix structure.
9. A component formed by the process of claim 8 .
10. The process of claim 8 , further comprising controlling the selective energy beam melting process to achieve a temperature gradient effective to form the fiber-matrix structure in which individual phases are present as Mo ss /Mo 5 SiB 2 /Mo 3 Si.
11. A component formed by the process of claim 10 .
12. The process of claim 8 , wherein a scanning speed between the powder and a laser energy beam is between 400 mm/s and 2000 mm/s.
13. The process of claim 12 , wherein the scanning speed is between 1000 mm/s and 1500 mm/s.
14. The process of claim 8 , wherein the selective energy beam melting process utilizes a laser energy beam power of from 80 W to 250 W.
15. The process of claim 14 , wherein the selective energy beam melting process utilizes a laser energy beam power of from 100 W to 170 W.