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公开(公告)号：US09453272B2
公开(公告)日：2016-09-27
申请号：US14645654
申请日：2015-03-12
发明人： Nhon Q Vo , David N Seidman , David C Dunand
摘要： Aluminum-zirconium and aluminum-zirconium-lanthanide superalloys are described that can be used in high temperature, high stress and a variety of other applications. The lanthanide is preferably holmium, erbium, thulium or ytterbium, most preferably erbium. Also, methods of making the aforementioned alloys are disclosed. The superalloys, which have commercially-suitable hardness at temperatures above about 220° C., include nanoscale Al3Zr precipitates and optionally nanoscale Al3Er precipitates and nanoscale Al3(Zr,Er) precipitates that create a high-strength alloy capable of withstanding intense heat conditions. These nanoscale precipitates have a L12-structure in α-Al(f.c.c.) matrix, an average diameter of less than about 20 nanometers (“nm”), preferably less than about 10 nm, and more preferably about 4-6 nm and a high number density, which for example, is larger than about 1021 m−3, of the nanoscale precipitates. The formation of the high number density of nanoscale precipitates is thought to be due to the addition of inoculant, such as a Group 3A, 4A, and 5A metal or metalloid. Additionally, methods for increasing the diffusivity of Zr in Al are disclosed.
摘要翻译： 描述了可用于高温，高应力和各种其它应用的铝 - 锆和铝 - 锆 - 镧系元素超级合金。 镧系元素优选为钬，铒，ium或镱，最优选为铒。 另外，公开了制造上述合金的方法。 在高于约220℃的温度下具有商业上适合的硬度的超级合金包括纳米尺度的Al 3 Zr沉淀物和任选的纳米级Al 3 Er沉淀物和纳米尺度的Al 3（Zr，Er）沉淀物，其产生能够承受强烈热条件的高强度合金。 这些纳米级沉淀物在α-Al（fcc）基质中具有L12结构，平均直径小于约20纳米（“nm”），优选小于约10nm，更优选约4-6nm，高 数量密度，例如大于约1021m-3的纳米级沉淀物。 高密度的纳米级沉淀物的形成被认为是由于加入孕育剂，例如3A，4A和5A族金属或准金属。 另外，公开了提高Al在Al中的扩散率的方法。
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