Journal of Sustainable Metallurgy ( IF 2.5 ) Pub Date : 2022-07-05 , DOI: 10.1007/s40831-022-00562-4 Zachary C Sims 1, 2 , Michael S Kesler 2, 3 , Hunter B Henderson 1, 2 , Emilio Castillo 4 , Tomer Fishman 5 , David Weiss 2, 6 , Prentice Singleton 2, 7 , Roderick Eggert 2, 8 , Scott K McCall 1, 2 , Orlando Rios 2, 9
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The largest outputs of rare earth mining are the low-value byproducts cerium and lanthanum, which burden rare earth supply chains because they must be separated from more desirable rare earths used in magnet production. Promoting demand for cerium and lanthanum can potentially diversify the economics of rare earth mining and improve supply chain stability for all rare earth elements. A promising avenue for increasing byproduct rare earth element demand is their use in aluminum alloys; an application for cerium and lanthanum offering multiple benefits to manufacturing such as energy reduction and improved throughput. Experimental materials science and economic implications of Al-rare earth element alloys will be discussed. We show that Al–La/Ce alloys have elevated mechanical strength compared to more traditional aluminum alloys, in some formulations can be used without heat treatment, and possess a highly castable eutectic microstructure. This report presents the use of cerium and lanthanum in aluminum alloys as an example of how supply chain focused approaches to technological development can benefit stakeholders at every step in production.
Graphical Abstract
中文翻译：
铈和镧作为副产品如何促进稳定的稀土生产和新合金
稀土开采的最大产出是低价值的副产品铈和镧，它们给稀土供应链带来负担，因为它们必须与磁体生产中使用的更理想的稀土分离。促进对铈和镧的需求可能会使稀土开采的经济多样化，并提高所有稀土元素的供应链稳定性。增加副产品稀土元素需求的一个有前景的途径是在铝合金中使用稀土元素。铈和镧的应用可为制造业带来多种好处，例如减少能源和提高产量。将讨论稀土元素合金的实验材料科学和经济意义。我们表明，与更传统的铝合金相比，Al-La/Ce 合金具有更高的机械强度，在某些配方中无需热处理即可使用，并且具有高度可铸造的共晶微观结构。本报告以铈和镧在铝合金中的使用为例，说明以供应链为中心的技术开发方法如何使生产每一步的利益相关者受益。
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