Engineering Papers⌕ Search

SEARCH · Engineering Papers

Results for “Al-Hf-Si”

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.

2 records
All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on Hf2AlSi by Materials Project

Hf2AlSi crystallizes in the orthorhombic Amm2 space group. The structure is three-dimensional. there are two inequivalent Hf sites. In the first Hf site, Hf is bonded in a 5-coordinate geometry to three equivalent Al and four equivalent Si atoms. There are one shorter (2.78 Å) and two longer (2.95 Å) Hf–Al bond lengths. All Hf–Si bond lengths are 2.77 Å. In the second Hf site, Hf is bonded in a 7-coordinate geometry to four equivalent Al and three equivalent Si atoms. All Hf–Al bond lengths are 2.78 Å. There are one shorter (2.77 Å) and two longer (2.96 Å) Hf–Si bond lengths. Al is bonded in a 9-coordinate geometry to seven Hf and two equivalent Si atoms. Both Al–Si bond lengths are 2.48 Å. Si is bonded in a 9-coordinate geometry to seven Hf and two equivalent Al atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Hf10(AlSi)3 by Materials Project

Hf10(AlSi)3 crystallizes in the hexagonal P-62m space group. The structure is three-dimensional. there are three inequivalent Hf sites. In the first Hf site, Hf is bonded in a 6-coordinate geometry to three equivalent Al and three equivalent Si atoms. All Hf–Al bond lengths are 2.84 Å. All Hf–Si bond lengths are 2.83 Å. In the second Hf site, Hf is bonded in a 5-coordinate geometry to three equivalent Al and two equivalent Si atoms. There are two shorter (2.74 Å) and one longer (2.89 Å) Hf–Al bond lengths. Both Hf–Si bond lengths are 3.03 Å. In the third Hf site, Hf is bonded in a 5-coordinate geometry to two equivalent Al and three equivalent Si atoms. Both Hf–Al bond lengths are 3.04 Å. There are two shorter (2.73 Å) and one longer (2.91 Å) Hf–Si bond lengths. Al is bonded in a 9-coordinate geometry to nine Hf atoms. Si is bonded in a 9-coordinate geometry to nine Hf atoms.

36 MATERIALS SCIENCE↗