Cobalt-base high-temperature alloys

J. Sato, T. Omori, K. Oikawa, I. Ohnuma, R. Kainuma, K. Ishida

Research output: Contribution to journalArticlepeer-review

898 Citations (Scopus)


We have identified cobalt-base superalloys showing a high-temperature strength greater than those of conventional nickel-base superalloys. The cobalt-base alloys are strengthened by a ternary compound with the L1 2 structure, γ′ Co3(Al,W), which precipitates in the disordered γface-centered cubic cobalt matrix with high coherency and with high melting points. We also identified a ternary compound, γ′ Ir3(Al,W), with the L12 structure, which suggests that the Co-Ir-Al-W-base systems with γ + γ′ (Co,Ir)3(Al,W) structures offer great promise as candidates for next-generation high-temperature materials.

Original languageEnglish
Pages (from-to)90-91
Number of pages2
Issue number5770
Publication statusPublished - 2006 Apr 7


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