Engineering Papers⌕ Search

SEARCH · Engineering Papers

Results for “Al-Hf-Zn”

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.

3 records
All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on Hf2Al3Zn by Materials Project

Hf2ZnAl3 is Hexagonal Laves-derived structured and crystallizes in the trigonal R-3m space group. The structure is three-dimensional. Hf is bonded in a 12-coordinate geometry to four equivalent Hf, three equivalent Zn, and nine equivalent Al atoms. There are one shorter (3.16 Å) and three longer (3.23 Å) Hf–Hf bond lengths. All Hf–Zn bond lengths are 3.10 Å. There are three shorter (3.05 Å) and six longer (3.08 Å) Hf–Al bond lengths. Zn is bonded to six equivalent Hf and six equivalent Al atoms to form ZnHf6Al6 cuboctahedra that share corners with six equivalent ZnHf6Al6 cuboctahedra, corners with twelve equivalent AlHf6Al4Zn2 cuboctahedra, edges with six equivalent ZnHf6Al6 cuboctahedra, and faces with eighteen equivalent AlHf6Al4Zn2 cuboctahedra. All Zn–Al bond lengths are 2.61 Å. Al is bonded to six equivalent Hf, two equivalent Zn, and four equivalent Al atoms to form AlHf6Al4Zn2 cuboctahedra that share corners with four equivalent ZnHf6Al6 cuboctahedra, corners with fourteen equivalent AlHf6Al4Zn2 cuboctahedra, edges with six equivalent AlHf6Al4Zn2 cuboctahedra, faces with six equivalent ZnHf6Al6 cuboctahedra, and faces with twelve equivalent AlHf6Al4Zn2 cuboctahedra. All Al–Al bond lengths are 2.65 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on HfAlZn by Materials Project

HfZnAl is Hexagonal Laves-derived structured and crystallizes in the orthorhombic Imma space group. The structure is three-dimensional. Hf is bonded in a 12-coordinate geometry to four equivalent Hf, six equivalent Zn, and six equivalent Al atoms. There are two shorter (3.18 Å) and two longer (3.23 Å) Hf–Hf bond lengths. There are two shorter (3.06 Å) and four longer (3.08 Å) Hf–Zn bond lengths. There are two shorter (3.05 Å) and four longer (3.06 Å) Hf–Al bond lengths. Zn is bonded to six equivalent Hf, two equivalent Zn, and four equivalent Al atoms to form ZnHf6Al4Zn2 cuboctahedra that share corners with eight equivalent AlHf6Al2Zn4 cuboctahedra, corners with ten equivalent ZnHf6Al4Zn2 cuboctahedra, edges with six equivalent ZnHf6Al4Zn2 cuboctahedra, faces with six equivalent ZnHf6Al4Zn2 cuboctahedra, and faces with twelve equivalent AlHf6Al2Zn4 cuboctahedra. Both Zn–Zn bond lengths are 2.60 Å. All Zn–Al bond lengths are 2.61 Å. Al is bonded to six equivalent Hf, four equivalent Zn, and two equivalent Al atoms to form AlHf6Al2Zn4 cuboctahedra that share corners with eight equivalent ZnHf6Al4Zn2 cuboctahedra, corners with ten equivalent AlHf6Al2Zn4 cuboctahedra, edges with six equivalent AlHf6Al2Zn4 cuboctahedra, faces with six equivalent AlHf6Al2Zn4 cuboctahedra, and faces with twelve equivalent ZnHf6Al4Zn2 cuboctahedra. Both Al–Al bond lengths are 2.64 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on HfAl2Zn by Materials Project

HfZnAl2 is beta Cu3Ti-derived structured and crystallizes in the tetragonal P4/mmm space group. The structure is three-dimensional. Hf is bonded to four equivalent Zn and eight equivalent Al atoms to form HfAl8Zn4 cuboctahedra that share corners with twelve equivalent HfAl8Zn4 cuboctahedra, edges with eight equivalent ZnHf4Al8 cuboctahedra, edges with sixteen equivalent AlHf4Al4Zn4 cuboctahedra, faces with four equivalent ZnHf4Al8 cuboctahedra, faces with six equivalent HfAl8Zn4 cuboctahedra, and faces with eight equivalent AlHf4Al4Zn4 cuboctahedra. All Hf–Zn bond lengths are 2.88 Å. All Hf–Al bond lengths are 2.86 Å. Zn is bonded to four equivalent Hf and eight equivalent Al atoms to form ZnHf4Al8 cuboctahedra that share corners with twelve equivalent ZnHf4Al8 cuboctahedra, edges with eight equivalent HfAl8Zn4 cuboctahedra, edges with sixteen equivalent AlHf4Al4Zn4 cuboctahedra, faces with four equivalent HfAl8Zn4 cuboctahedra, faces with six equivalent ZnHf4Al8 cuboctahedra, and faces with eight equivalent AlHf4Al4Zn4 cuboctahedra. All Zn–Al bond lengths are 2.86 Å. Al is bonded to four equivalent Hf, four equivalent Zn, and four equivalent Al atoms to form AlHf4Al4Zn4 cuboctahedra that share corners with twelve equivalent AlHf4Al4Zn4 cuboctahedra, edges with eight equivalent HfAl8Zn4 cuboctahedra, edges with eight equivalent ZnHf4Al8 cuboctahedra, edges with eight equivalent AlHf4Al4Zn4 cuboctahedra, faces with four equivalent HfAl8Zn4 cuboctahedra, faces with four equivalent ZnHf4Al8 cuboctahedra, and faces with ten equivalent AlHf4Al4Zn4 cuboctahedra. All Al–Al bond lengths are 2.88 Å.

36 MATERIALS SCIENCE↗