Cobalt-base high-temperature alloys
Cobalt-base high-temperature alloys
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DOI：
10.1126/science.1121738
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发表时间：
2006-04-07
期刊：
影响因子：
56.9
通讯作者：
Ishida, K
中科院分区：
文献类型：
--
作者：
Sato, J;Omori, T;Ishida, K
我们已经发现钴基高温合金的高温强度高于传统镍基高温合金。钴基合金通过具有L1(2)结构的三元化合物γ'Co-3(Al,W)进行强化，该三元化合物在无序的γ面心立方钴基体中析出，具有高共格性和高熔点。我们还发现了一种具有 L1(2) 结构的三元化合物 gamma ' Ir-3(Al, W)，这表明具有 gamma + gamma ' (Co, Ir)(3)(Al, W) 结构的 Co-Ir-Al-W 基体系作为下一代高温材料的候选者具有广阔的前景。
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, gamma ' Co-3( Al,W), which precipitates in the disordered gamma face-centered cubic cobalt matrix with high coherency and with high melting points. We also identified a ternary compound, gamma ' Ir-3(Al, W), with the L1(2) structure, which suggests that the Co-Ir-Al-W-base systems with gamma + gamma ' (Co, Ir)(3)(Al, W) structures offer great promise as candidates for next-generation high-temperature materials.