Oxide Dispersion Strengthened
Oxide Dispersion Strengthened is the common name for oxide dispersion strengthened (ODS) superalloys. These materials cannot generally be produced by melt metallurgy and are therefore produced by mechanical alloying . These materials are z. B. used for the highest temperature stressed blades of gas turbines .
The ODS materials essentially consist of a metallic base material in which highly stable oxides such as yttrium oxide are incorporated in an atomically finely distributed manner. As a result, the material does not have the opportunity to diffuse even at very high temperatures, or it may also prevent grain boundaries from migrating to thermodynamically energetically lower states. The monocrystalline ODS alloys are special cases.
literature
- Werner Schatt, Elke Simmchen, Gustav Zouhar: Construction materials of machine and plant construction. P. 216 ff.
Individual evidence
- ↑ Christof Lechner, Jarg Seume, Jörg Seume: Stationary gas turbines. Springer, Berlin et al., P. 806.
- ↑ Peter KJ Busse: Production of single-crystal ODS superalloys. Dissertation. Technical University, Aachen 1993, DNB 931995221 .