Copper alloys exhibiting enhanced oxidation resistance are provided by adding an amount of sulfur that is effective to enhance oxidative resistance. Such sulfur addition can be achieved by combining elemental forms of copper and sulfur and heating the mixture to form a molten alloy, or by forming a sulfur-rich pre-mix that is added to a base alloy composition. Forming a pre-mix provides improved homogeneity and distribution of the sulfur predominantly in the form of a metal sulfide.

Provided is a sintered bearing, including Al, Cu, and Ni, the sintered bearing having Al—Cu—Ni alloy structures (3) sintered together. The Al—Cu—Ni alloy structures (3) each have an Al—Cu—Ni matrix phase (α-phase) and an Al—Ni compound phase (κ-phase), and are free of an Al—Cu compound phase (γ-phase).

Provided is a sintered bearing, including Al, Cu, and Ni, the sintered bearing having Al—Cu—Ni alloy structures (3) sintered together. The Al—Cu—Ni alloy structures (3) each have an Al—Cu—Ni matrix phase (α-phase) and an Al—Ni compound phase (κ-phase), and are free of an Al—Cu compound phase (γ-phase).

A conductive material for connection parts includes a matrix, a Cu—Sn alloy covering layer having a Cu content of 20 to 70 at % and an average thickness of from 0.2 to 3.0 μm, and a Sn covering layer having an average thickness of from 0.05 to 5.0 μm. The matrix is a copper alloy strip containing specified amounts of Cr and Zr or specified amounts of Fe and P, or a Cu—Zn alloy strip containing a specified amount of Zn. The Cu—Sn alloy covering layer and the Sn covering layer are formed in this order on a surface of the matrix.

The present disclosure relates generally to wires and more particularly to textured powder wires containing nanoscale metallic silver powder. The invention presents an improvement of the process of making compressed cores of textured-powder high-temperature superconductor previously using the micaceous high-temperature superconductor Bi-2212. Embodiments of the claimed methods are useful with the micaceous high-temperature superconductors, notably Bi2Sr2CaCu208+x (Bi-2212) and Bi2S-r2Ca2Cu3O10+x (Bi-2223) and rare earth barium copper oxide (REBCO).

The present disclosure relates generally to wires and more particularly to textured powder wires containing nanoscale metallic silver powder. The invention presents an improvement of the process of making compressed cores of textured-powder high-temperature superconductor previously using the micaceous high-temperature superconductor Bi-2212. Embodiments of the claimed methods are useful with the micaceous high-temperature superconductors, notably Bi2Sr2CaCu208+x (Bi-2212) and Bi2S-r2Ca2Cu3O10+x (Bi-2223) and rare earth barium copper oxide (REBCO).

A facile method is based on a pack-cementation process using large-area copper foil instead of copper powder. By controlling a pack-cementation time and an amount of alloying element (e.g., aluminum), a hierarchical microporous or nanoporous copper can be created. When coated with tin active material, the hierarchical microporous or nanoporous copper can be used as an advanced lithium-ion battery anode. A coin-cell test exhibited a four-fold higher areal capacity (e.g., 7.4 milliamp-hours per square centimeter without any performance degradation up to 20 cycles) as compared to a traditional graphite anode.

A facile method is based on a pack-cementation process using large-area copper foil instead of copper powder. By controlling a pack-cementation time and an amount of alloying element (e.g., aluminum), a hierarchical microporous or nanoporous copper can be created. When coated with tin active material, the hierarchical microporous or nanoporous copper can be used as an advanced lithium-ion battery anode. A coin-cell test exhibited a four-fold higher areal capacity (e.g., 7.4 milliamp-hours per square centimeter without any performance degradation up to 20 cycles) as compared to a traditional graphite anode.

A coating for a blade root/disk interface includes a layer of soft metal matrix, and a solid lubricant distributed through the soft metal matrix. Examples of materials include CuAl as the soft metal matrix and MoS.sub.2 as the solid lubricant, although others are also disclosed.

Provided is a cylindrical sputtering target material formed of copper or a copper alloy, in which an average value of the special grain boundary length ratios Lσ.sub.N/L.sub.N which are measured with respect to the outer peripheral surfaces of both end portions and the outer peripheral surface of the center portion in an axis O direction is set to be equal to or greater than 0.5, and each measured value is in a range of ±20% with respect to the average value of the special grain boundary length ratios Lσ.sub.N/L.sub.N, and the total amount of Si and C which are impurity elements is equal to or smaller than 10 mass ppm and the amount of O is equal to or smaller than 50 mass ppm.