Search NASA⌕ Search

SEARCH · Search NASA

Results for “Cu-Sc”

Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

5 records
All sourcesNASA NTRSDOE OSTI
DOE OSTI2026

Solute diffusion behavior during heat treatment and its impact in Sc-microalloyed Al-Cu system

Scandium (Sc) is a promising microalloying element that enhances the strength and thermal stability of aluminum (Al) alloys. However, these benefits are not fully realized in aluminum-copper (Al-Cu) systems, and corrosion resistance often declines due to the complex phase evolution and diffusion behavior of Cu and Sc. Here, to clarify this, solute diffusion behavior and Cu-Sc interaction during heat treatment (HT) were investigated using in situ synchrotron-based transmission x-ray microscopy (TXM), wide-angle x-ray scattering (WAXS), and x-ray absorption near-edge structure (XANES) spectroscopy. The results, supported by electron microscopy, reveal strong Cu-Sc bonding that significantly impedes solute diffusion, leading to inhomogeneous solute distribution and non-uniform precipitation. Moreover, the Al-Cu-Sc eutectic phase exhibits high thermal stability, resisting dissolution even near the matrix liquidus. These findings quantitatively elucidate the sluggish diffusion kinetics of Cu and Sc, which can help redesign HT schedules to improve both mechanical properties and corrosion resistance in Sc-microalloyed Al-Cu alloys.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on ScCu by Materials Project

ScCu is Tetraauricupride structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Sc is bonded in a body-centered cubic geometry to eight equivalent Cu atoms. All Sc–Cu bond lengths are 2.82 Å. Cu is bonded in a body-centered cubic geometry to eight equivalent Sc atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on ScCu3 by Materials Project

ScCu3 is alpha bismuth trifluoride structured and crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Sc is bonded to twelve Cu atoms to form ScCu12 cuboctahedra that share corners with four equivalent ScCu12 cuboctahedra, corners with twenty-four CuSc4Cu4 cuboctahedra, edges with eight equivalent ScCu12 cuboctahedra, edges with eight equivalent CuSc4Cu4 cuboctahedra, faces with four equivalent ScCu12 cuboctahedra, and faces with six equivalent CuSc4Cu8 cuboctahedra. There are eight shorter (2.68 Å) and four longer (2.79 Å) Sc–Cu bond lengths. There are two inequivalent Cu sites. In the first Cu site, Cu is bonded to four equivalent Sc and four equivalent Cu atoms to form distorted CuSc4Cu4 cuboctahedra that share corners with eight equivalent ScCu12 cuboctahedra, corners with sixteen CuSc4Cu4 cuboctahedra, edges with four equivalent ScCu12 cuboctahedra, edges with sixteen CuSc4Cu4 cuboctahedra, and faces with six equivalent CuSc4Cu4 cuboctahedra. All Cu–Cu bond lengths are 2.68 Å. In the second Cu site, Cu is bonded to four equivalent Sc and eight equivalent Cu atoms to form CuSc4Cu8 cuboctahedra that share corners with eight equivalent ScCu12 cuboctahedra, corners with twenty CuSc4Cu4 cuboctahedra, edges with sixteen CuSc4Cu4 cuboctahedra, faces with four equivalent CuSc4Cu8 cuboctahedra, and faces with six equivalent ScCu12 cuboctahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on ScCu3 by Materials Project

ScCu3 is alpha bismuth trifluoride structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Sc is bonded in a distorted body-centered cubic geometry to fourteen Cu atoms. There are eight shorter (2.64 Å) and six longer (3.05 Å) Sc–Cu bond lengths. There are two inequivalent Cu sites. In the first Cu site, Cu is bonded in a 8-coordinate geometry to six equivalent Sc and eight equivalent Cu atoms. All Cu–Cu bond lengths are 2.64 Å. In the second Cu site, Cu is bonded to four equivalent Sc and four equivalent Cu atoms to form a mixture of distorted edge, face, and corner-sharing CuSc4Cu4 tetrahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on ScCu2 by Materials Project

ScCu2 is Titanium Disilicide-like structured and crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Sc is bonded in a distorted q6 geometry to ten equivalent Cu atoms. All Sc–Cu bond lengths are 2.75 Å. Cu is bonded in a 10-coordinate geometry to five equivalent Sc atoms.

36 MATERIALS SCIENCE↗