TY - JOUR
T1 - Cobalt-base high-temperature alloys
AU - Sato, J.
AU - Omori, T.
AU - Oikawa, K.
AU - Ohnuma, I.
AU - Kainuma, R.
AU - Ishida, K.
PY - 2006/4/7
Y1 - 2006/4/7
N2 - 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.
AB - 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.
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U2 - 10.1126/science.1121738
DO - 10.1126/science.1121738
M3 - Article
AN - SCOPUS:33645661475
SN - 0036-8075
VL - 312
SP - 90
EP - 91
JO - Science
JF - Science
IS - 5770
ER -