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At least 703 records · Page 39
All sourcesNASA NTRSDOE OSTI
DOE OSTI2021

High Temperature Oxidation Behavior of Fe- and Ni-Based Alloy Foils in Water Vapor at 850 °C

Operating temperatures above 700°C are desired to improve the efficiency of power generation systems such as microturbines. Therefore, the use of creep-resistant Ni-based or Fe-based alloys, which can form protective Cr2O3 and Al2O3 scales, is required. In this paper, Fe- and Ni-based alloy foils were oxidized in air + 10 % H2O for up to 3,000 h at 850°C to identify the most promising alloys. The thickness and chemical composition of the spinel oxide formed on top of the Cr2O3 scale varied between S3100, N08120 and N06230 alloy foils. In addition, the rate of Cr and Mn loss (spinel and Cr2O3 oxidation and volatilization) or Al loss (oxidation) and the dissolution of strengthening precipitates, were found to be a function of the nature of the formed oxide (Fe or Ni-rich spinel, Cr2O3, Al2O3). Alloys N06230 and alumina-forming austenitic (AFA) steels were found to be well-suited for the applications as microturbine recuperator foil materials up to 850°C.

Romedenne, Marie↗
DOE OSTI2022

Catalyst comprising Pt, Ni, and Cr

Catalysts comprising nanostructured elements comprising microstructured whiskers having an outer surface at least partially covered by a catalyst material comprising at least 90 atomic percent collectively Pt, Ni, and Cr, wherein the Pt is present in a range from 32.4 to 35.8 atomic percent, the Ni is present in a range from 57.7 to 63.7 atomic percent, and the Cr is present in a range from 0.5 to 10.0 atomic percent, and wherein the total atomic percent of Pt, Ni, and Cr equals 100. Catalyst described herein are useful, for example, in fuel cell membrane electrode assemblies.

Steinbach, Andrew J. L.↗
DOE OSTI2022

Creep resistant Ni-based superalloy casting and method of manufacture for advanced high-temperature applications

One or more embodiments relates to a method of casting a creep-resistant Ni-based superalloy and a homogenization heat treatment for the alloy. The method includes forming a feed stock having Nickel (Ni) and at least one of Chromium (Cr), Cobalt (Co), Aluminum (Al), Titanium (Ti), Niobium (Nb), Iron (Fe), Carbon (C), Manganese (Mn), Molybdenum (Mo), Silicon (Si), Copper (Cu), Phosphorus (P), Sulfur (S) and Boron (B). The method further includes fabricating the creep-resistant Ni-based superalloy in a predetermined shape using the feed stock and at least one process such as vacuum induction melting (VIM), electroslag remelting (ESR) and/or vacuum arc remelting (VAR).

Jablonski, Paul D.↗
DOE OSTI2020

Materials Data on Ni(RhO2)2 by Materials Project

Ni(RhO2)2 is Spinel structured and crystallizes in the tetragonal I4_1/amd space group. The structure is three-dimensional. Rh3+ is bonded to six equivalent O2- atoms to form RhO6 octahedra that share corners with six equivalent NiO4 tetrahedra and edges with six equivalent RhO6 octahedra. All Rh–O bond lengths are 2.07 Å. Ni2+ is bonded to four equivalent O2- atoms to form NiO4 tetrahedra that share corners with twelve equivalent RhO6 octahedra. The corner-sharing octahedra tilt angles range from 57–61°. All Ni–O bond lengths are 2.02 Å. O2- is bonded in a rectangular see-saw-like geometry to three equivalent Rh3+ and one Ni2+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ni(C2N3)2 by Materials Project

Ni(C2N3)2 crystallizes in the orthorhombic Pnnm space group. The structure is three-dimensional. Ni2+ is bonded in an octahedral geometry to six N3- atoms. There are four shorter (2.02 Å) and two longer (2.19 Å) Ni–N bond lengths. C4+ is bonded in a linear geometry to two N3- atoms. There is one shorter (1.17 Å) and one longer (1.31 Å) C–N bond length. There are two inequivalent N3- sites. In the first N3- site, N3- is bonded in a trigonal planar geometry to one Ni2+ and two equivalent C4+ atoms. In the second N3- site, N3- is bonded in a bent 150 degrees geometry to one Ni2+ and one C4+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ni(H2N)2 by Materials Project

NiN2H4 crystallizes in the cubic Pm-3 space group. The structure is zero-dimensional and consists of three NiN2H4 clusters. there are two inequivalent Ni2+ sites. In the first Ni2+ site, Ni2+ is bonded in a rectangular see-saw-like geometry to four equivalent N3- atoms. All Ni–N bond lengths are 1.91 Å. In the second Ni2+ site, Ni2+ is bonded in a rectangular see-saw-like geometry to four N3- atoms. All Ni–N bond lengths are 1.92 Å. There are three inequivalent N3- sites. In the first N3- site, N3- is bonded to two equivalent Ni2+ and two equivalent H1+ atoms to form distorted corner-sharing NNi2H2 tetrahedra. Both N–H bond lengths are 1.02 Å. In the second N3- site, N3- is bonded to two Ni2+ and two H1+ atoms to form distorted corner-sharing NNi2H2 tetrahedra. There is one shorter (1.02 Å) and one longer (1.03 Å) N–H bond length. In the third N3- site, N3- is bonded to two equivalent Ni2+ and two equivalent H1+ atoms to form distorted corner-sharing NNi2H2 tetrahedra. Both N–H bond lengths are 1.02 Å. There are four inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the second H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the third H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the fourth H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ni(PO3)4 by Materials Project

Ni(PO3)4 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. Ni4+ is bonded to six O2- atoms to form NiO6 octahedra that share corners with six PO4 tetrahedra. There are a spread of Ni–O bond distances ranging from 1.94–2.10 Å. There are two inequivalent P5+ sites. In the first P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share a cornercorner with one NiO6 octahedra and corners with two equivalent PO4 tetrahedra. The corner-sharing octahedral tilt angles are 54°. There are a spread of P–O bond distances ranging from 1.51–1.62 Å. In the second P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with two equivalent NiO6 octahedra and corners with two equivalent PO4 tetrahedra. The corner-sharing octahedra tilt angles range from 32–47°. There are a spread of P–O bond distances ranging from 1.48–1.62 Å. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 120 degrees geometry to two P5+ atoms. In the second O2- site, O2- is bonded in a bent 150 degrees geometry to one Ni4+ and one P5+ atom. In the third O2- site, O2- is bonded in a bent 120 degrees geometry to one Ni4+ and one P5+ atom. In the fourth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Ni4+ and one P5+ atom. In the fifth O2- site, O2- is bonded in a bent 150 degrees geometry to two P5+ atoms. In the sixth O2- site, O2- is bonded in a single-bond geometry to one P5+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ni(RhSe2)2 by Materials Project

Ni(RhSe2)2 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. Rh3+ is bonded to six Se2- atoms to form RhSe6 octahedra that share corners with six equivalent NiSe6 octahedra, edges with six equivalent RhSe6 octahedra, and a faceface with one NiSe6 octahedra. The corner-sharing octahedra tilt angles range from 48–55°. There are a spread of Rh–Se bond distances ranging from 2.48–2.61 Å. Ni2+ is bonded to six Se2- atoms to form NiSe6 octahedra that share corners with twelve equivalent RhSe6 octahedra, edges with two equivalent NiSe6 octahedra, and faces with two equivalent RhSe6 octahedra. The corner-sharing octahedra tilt angles range from 48–55°. There are two shorter (2.50 Å) and four longer (2.52 Å) Ni–Se bond lengths. There are two inequivalent Se2- sites. In the first Se2- site, Se2- is bonded in a distorted rectangular see-saw-like geometry to three equivalent Rh3+ and one Ni2+ atom. In the second Se2- site, Se2- is bonded in a 5-coordinate geometry to three equivalent Rh3+ and two equivalent Ni2+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ni(PO3)4 by Materials Project

Ni(PO3)4 crystallizes in the orthorhombic Pbcn space group. The structure is three-dimensional. Ni4+ is bonded to six O2- atoms to form NiO6 octahedra that share corners with six PO4 tetrahedra. There are two shorter (1.99 Å) and four longer (2.01 Å) Ni–O bond lengths. There are two inequivalent P5+ sites. In the first P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share a cornercorner with one NiO6 octahedra and corners with two equivalent PO4 tetrahedra. The corner-sharing octahedral tilt angles are 46°. There are a spread of P–O bond distances ranging from 1.50–1.61 Å. In the second P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with two equivalent NiO6 octahedra and corners with two equivalent PO4 tetrahedra. The corner-sharing octahedra tilt angles range from 45–54°. There are a spread of P–O bond distances ranging from 1.50–1.61 Å. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Ni4+ and one P5+ atom. In the second O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Ni4+ and one P5+ atom. In the third O2- site, O2- is bonded in a single-bond geometry to one P5+ atom. In the fourth O2- site, O2- is bonded in a bent 120 degrees geometry to one Ni4+ and one P5+ atom. In the fifth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two P5+ atoms. In the sixth O2- site, O2- is bonded in a bent 120 degrees geometry to two P5+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ni(RhO2)2 by Materials Project

Ni(RhO2)2 is Spinel structured and crystallizes in the tetragonal I4_1/amd space group. The structure is three-dimensional. Rh3+ is bonded to six equivalent O2- atoms to form RhO6 octahedra that share corners with six equivalent NiO4 tetrahedra and edges with six equivalent RhO6 octahedra. There are two shorter (2.07 Å) and four longer (2.08 Å) Rh–O bond lengths. Ni2+ is bonded to four equivalent O2- atoms to form NiO4 tetrahedra that share corners with twelve equivalent RhO6 octahedra. The corner-sharing octahedra tilt angles range from 52–61°. All Ni–O bond lengths are 2.01 Å. O2- is bonded in a rectangular see-saw-like geometry to three equivalent Rh3+ and one Ni2+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ni(PO3)4 by Materials Project

Ni(PO3)4 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. Ni4+ is bonded to six O2- atoms to form NiO6 octahedra that share corners with six PO4 tetrahedra. There are a spread of Ni–O bond distances ranging from 1.95–2.08 Å. There are two inequivalent P5+ sites. In the first P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with two equivalent NiO6 octahedra and corners with two equivalent PO4 tetrahedra. The corner-sharing octahedra tilt angles range from 31–49°. There are a spread of P–O bond distances ranging from 1.48–1.61 Å. In the second P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share a cornercorner with one NiO6 octahedra and corners with two equivalent PO4 tetrahedra. The corner-sharing octahedral tilt angles are 52°. There are a spread of P–O bond distances ranging from 1.50–1.62 Å. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 150 degrees geometry to one Ni4+ and one P5+ atom. In the second O2- site, O2- is bonded in a single-bond geometry to one P5+ atom. In the third O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Ni4+ and one P5+ atom. In the fourth O2- site, O2- is bonded in a bent 120 degrees geometry to one Ni4+ and one P5+ atom. In the fifth O2- site, O2- is bonded in a bent 120 degrees geometry to two P5+ atoms. In the sixth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two P5+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ni(Pt3O4)4 by Materials Project

Ni(Pt3O4)4 crystallizes in the cubic Fm-3 space group. The structure is three-dimensional. Pt+2.50+ is bonded in a square co-planar geometry to four O2- atoms. There are two shorter (2.00 Å) and two longer (2.03 Å) Pt–O bond lengths. Ni2+ is bonded in a body-centered cubic geometry to eight equivalent O2- atoms. All Ni–O bond lengths are 2.23 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a trigonal planar geometry to three equivalent Pt+2.50+ atoms. In the second O2- site, O2- is bonded to three equivalent Pt+2.50+ and one Ni2+ atom to form a mixture of edge and corner-sharing ONiPt3 trigonal pyramids.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ni(BW)2 by Materials Project

Ni(WB)2 crystallizes in the orthorhombic Immm space group. The structure is three-dimensional. W2+ is bonded in a 6-coordinate geometry to six equivalent B3- atoms. There are four shorter (2.33 Å) and two longer (2.54 Å) W–B bond lengths. Ni2+ is bonded in a square co-planar geometry to four equivalent B3- atoms. All Ni–B bond lengths are 2.10 Å. B3- is bonded in a 9-coordinate geometry to six equivalent W2+, two equivalent Ni2+, and one B3- atom. The B–B bond length is 1.86 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ni(Pt3O4)4 by Materials Project

Ni(Pt3O4)4 crystallizes in the orthorhombic Pmmm space group. The structure is three-dimensional. there are five inequivalent Pt+2.50+ sites. In the first Pt+2.50+ site, Pt+2.50+ is bonded in a square co-planar geometry to four equivalent O2- atoms. All Pt–O bond lengths are 2.03 Å. In the second Pt+2.50+ site, Pt+2.50+ is bonded in a square co-planar geometry to four equivalent O2- atoms. All Pt–O bond lengths are 2.02 Å. In the third Pt+2.50+ site, Pt+2.50+ is bonded in a square co-planar geometry to four O2- atoms. There are two shorter (2.00 Å) and two longer (2.04 Å) Pt–O bond lengths. In the fourth Pt+2.50+ site, Pt+2.50+ is bonded in a square co-planar geometry to four equivalent O2- atoms. All Pt–O bond lengths are 2.03 Å. In the fifth Pt+2.50+ site, Pt+2.50+ is bonded in a square co-planar geometry to four equivalent O2- atoms. All Pt–O bond lengths are 2.00 Å. Ni2+ is bonded in a body-centered cubic geometry to eight equivalent O2- atoms. All Ni–O bond lengths are 2.27 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded to three Pt+2.50+ and one Ni2+ atom to form a mixture of corner and edge-sharing ONiPt3 trigonal pyramids. In the second O2- site, O2- is bonded in a trigonal planar geometry to three Pt+2.50+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ni(Mo3Se4)2 by Materials Project

Ni(Mo3Se4)2 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are six inequivalent Mo+2.33+ sites. In the first Mo+2.33+ site, Mo+2.33+ is bonded to five Se2- atoms to form MoSe5 square pyramids that share corners with four MoSe5 square pyramids, corners with two equivalent NiSe4 tetrahedra, and edges with five MoSe5 square pyramids. There are a spread of Mo–Se bond distances ranging from 2.54–2.70 Å. In the second Mo+2.33+ site, Mo+2.33+ is bonded to five Se2- atoms to form MoSe5 square pyramids that share corners with four MoSe5 square pyramids, corners with two equivalent NiSe4 tetrahedra, and edges with five MoSe5 square pyramids. There are a spread of Mo–Se bond distances ranging from 2.54–2.71 Å. In the third Mo+2.33+ site, Mo+2.33+ is bonded to five Se2- atoms to form MoSe5 square pyramids that share corners with four MoSe5 square pyramids, corners with two equivalent NiSe4 tetrahedra, and edges with five MoSe5 square pyramids. There are a spread of Mo–Se bond distances ranging from 2.56–2.69 Å. In the fourth Mo+2.33+ site, Mo+2.33+ is bonded to five Se2- atoms to form MoSe5 square pyramids that share corners with four MoSe5 square pyramids, a cornercorner with one NiSe4 tetrahedra, edges with five MoSe5 square pyramids, and a faceface with one NiSe4 tetrahedra. There are a spread of Mo–Se bond distances ranging from 2.54–2.73 Å. In the fifth Mo+2.33+ site, Mo+2.33+ is bonded to five Se2- atoms to form MoSe5 square pyramids that share corners with four MoSe5 square pyramids, edges with five MoSe5 square pyramids, and an edgeedge with one NiSe4 tetrahedra. There are a spread of Mo–Se bond distances ranging from 2.53–2.68 Å. In the sixth Mo+2.33+ site, Mo+2.33+ is bonded to five Se2- atoms to form MoSe5 square pyramids that share corners with four MoSe5 square pyramids, a cornercorner with one NiSe4 tetrahedra, edges with five MoSe5 square pyramids, and an edgeedge with one NiSe4 tetrahedra. There are a spread of Mo–Se bond distances ranging from 2.56–2.69 Å. Ni2+ is bonded to four Se2- atoms to form NiSe4 tetrahedra that share corners with eight MoSe5 square pyramids, edges with two MoSe5 square pyramids, and a faceface with one MoSe5 square pyramid. There are a spread of Ni–Se bond distances ranging from 2.31–2.48 Å. There are eight inequivalent Se2- sites. In the first Se2- site, Se2- is bonded in a 4-coordinate geometry to four Mo+2.33+ atoms. In the second Se2- site, Se2- is bonded in a 1-coordinate geometry to four Mo+2.33+ and one Ni2+ atom. In the third Se2- site, Se2- is bonded in a 5-coordinate geometry to four Mo+2.33+ and one Ni2+ atom. In the fourth Se2- site, Se2- is bonded in a 5-coordinate geometry to four Mo+2.33+ and one Ni2+ atom. In the fifth Se2- site, Se2- is bonded in a 6-coordinate geometry to three Mo+2.33+ atoms. In the sixth Se2- site, Se2- is bonded in a 1-coordinate geometry to three Mo+2.33+ and one Ni2+ atom. In the seventh Se2- site, Se2- is bonded in a 4-coordinate geometry to four Mo+2.33+ atoms. In the eighth Se2- site, Se2- is bonded in a 4-coordinate geometry to four Mo+2.33+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ni(N3Cl)2 by Materials Project

Ni(N3Cl)2 crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Ni4+ is bonded to six equivalent N+0.33- atoms to form NiN6 octahedra that share faces with eight equivalent ClN12 cuboctahedra. All Ni–N bond lengths are 1.83 Å. N+0.33- is bonded in a single-bond geometry to one Ni4+ and four equivalent Cl1- atoms. All N–Cl bond lengths are 2.76 Å. Cl1- is bonded to twelve equivalent N+0.33- atoms to form ClN12 cuboctahedra that share corners with twelve equivalent ClN12 cuboctahedra, faces with six equivalent ClN12 cuboctahedra, and faces with four equivalent NiN6 octahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ni(BW)3 by Materials Project

Ni(WB)3 crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. there are two inequivalent W+2.33+ sites. In the first W+2.33+ site, W+2.33+ is bonded in a 6-coordinate geometry to six B3- atoms. There are a spread of W–B bond distances ranging from 2.31–2.54 Å. In the second W+2.33+ site, W+2.33+ is bonded in a 7-coordinate geometry to seven B3- atoms. There are a spread of W–B bond distances ranging from 2.36–2.48 Å. Ni2+ is bonded in a square co-planar geometry to four equivalent B3- atoms. All Ni–B bond lengths are 2.10 Å. There are two inequivalent B3- sites. In the first B3- site, B3- is bonded in a 9-coordinate geometry to six W+2.33+, two equivalent Ni2+, and one B3- atom. The B–B bond length is 1.87 Å. In the second B3- site, B3- is bonded in a 9-coordinate geometry to seven W+2.33+ and two equivalent B3- atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ni(BiO3)2 by Materials Project

Ni(BiO3)2 is Hydrophilite-derived structured and crystallizes in the tetragonal P4_2/mnm space group. The structure is three-dimensional. Ni4+ is bonded to six O2- atoms to form NiO6 octahedra that share corners with eight equivalent BiO6 octahedra and edges with two equivalent BiO6 octahedra. The corner-sharing octahedra tilt angles range from 49–50°. There are four shorter (2.07 Å) and two longer (2.09 Å) Ni–O bond lengths. Bi4+ is bonded to six O2- atoms to form BiO6 octahedra that share corners with four equivalent NiO6 octahedra, corners with four equivalent BiO6 octahedra, an edgeedge with one NiO6 octahedra, and an edgeedge with one BiO6 octahedra. The corner-sharing octahedra tilt angles range from 49–53°. There are two shorter (2.14 Å) and four longer (2.16 Å) Bi–O bond lengths. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal planar geometry to one Ni4+ and two equivalent Bi4+ atoms. In the second O2- site, O2- is bonded in a trigonal planar geometry to one Ni4+ and two equivalent Bi4+ atoms.

36 MATERIALS SCIENCE↗