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	Record
	Type	van Dalen, Marsha E.; Karnesky, Richard A.; Cabotaje, Joseph R.; Dunand, David C.; Seidman, David N.
	Publication	Erbium and Ytterbium Solubilities and Diffusivities in Aluminum as Determined by Nanoscale Characterization of Precipitates	Volume	Journal Article
Pages	2009
	Abstract	Acta Materialia
	Corporate Author	Acta Mater.
Publisher	57
Editor	14
	Summary Language	4081-4089	Series Editor	Aluminum alloys; Rare-earth elements; Diffusion; Precipitation; Coarsening; Al-Er; Al-Yb
Abbreviated Series Title	Binary aluminum alloys with 0.03-0.06 at.% RE (RE = Yb or Er) were aged to produce coherent, nanosize Al₃RE precipitates in an α-Al matrix. The temporal evolution of precipitate radii and matrix concentrations at 300 °C are measured by transmission electron microscopy and localelectrode atom-probe tomography, respectively. The temporal dependence of the matrix concentration of each RE is utilized to determine its solubility in Al. The solubility as well as the coarsening rate constants are used to determine the diffusivity of each RE in α-Al and the α-Al/Al₃RE interfacial free energies at 300 °C. When compared to Sc, both Yb and Er exhibit smaller solubilities but larger diffusivities in α-Al and larger α-Al/Al₃RE interfacial energies.
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Serial		URL		ISBN
					no	NU @ karnesky @	10598
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