The present invention provides a sintered metal friction material that has excellent wear resistance, heat resistance even at high load and has a higher friction coefficient while maintaining a friction coefficient and wear resistance that are hard to decrease, and has a reduced content of copper of less than 5 mass %. There is provided a sintered metal friction material characterized in that the sintered metal friction material comprises a sintered material of a friction material composition, the friction material composition comprises matrix metals and a friction modifier, the matrix metals comprise following 20 to 40 mass % of iron powder, 20 to 40 mass % of nickel powder, 0.5 to 10 mass % of zinc powder, 0.5 to 5 mass, of tin powder, 0.5 to 4 mass % of copper powder and 0.5 to 5 mass % of sintering assist powder.

Provided is a copper-manganese-nickel based alloy having characteristics (in particular, specific resistance) close to those of a nickel-chromium based alloy. It is also an objective to provide an alloy having high processability compared to a nickel-chromium based alloy. An alloy for a resistive body includes copper, manganese, and nickel, wherein the manganese is 33 to 38% by mass, and the nickel is 8 to 15% by mass.

The present invention relates to new brazing alloys containing copper, silver, zinc, manganese, and indium, and a method for their production and their use.

The present invention relates to new brazing alloys containing copper, silver, zinc, manganese, and indium, and a method for their production and their use.

An n-type thermoelectric conversion material expressed in a chemical formula X.sub.3-xX′.sub.xT.sub.3-yCu.sub.ySb.sub.4 (0≦x<3, 0≦y<3.0, and x+y>0), the X includes one or more element(s) of Zr and Hf, the X′ includes one or more element(s) of Nb and Ta, and the T includes one or more element(s) selected from Ni, Pd, and Pt, while including at least Ni, the n-type thermoelectric conversion material expressed in the chemical formula X.sub.3-xX′.sub.xT.sub.3-yCu.sub.ySb.sub.4 has symmetry of a cubic crystal belonging to a space group I-43d.

An n-type thermoelectric conversion material expressed in a chemical formula X.sub.3-xX′.sub.xT.sub.3-yCu.sub.ySb.sub.4 (0≦x<3, 0≦y<3.0, and x+y>0), the X includes one or more element(s) of Zr and Hf, the X′ includes one or more element(s) of Nb and Ta, and the T includes one or more element(s) selected from Ni, Pd, and Pt, while including at least Ni, the n-type thermoelectric conversion material expressed in the chemical formula X.sub.3-xX′.sub.xT.sub.3-yCu.sub.ySb.sub.4 has symmetry of a cubic crystal belonging to a space group I-43d.

The present invention relates to metal alloys including copper.

A high-entropy alloy according to the present embodiment is a high-entropy alloy having an iron-rich phase and a copper-rich phase, and comprises a common complete solid solution metal that is completely solid-solved in iron and copper respectively. For example, the common complete solid solution metal may comprise nickel.

A high-entropy alloy according to the present embodiment is a high-entropy alloy having an iron-rich phase and a copper-rich phase, and comprises a common complete solid solution metal that is completely solid-solved in iron and copper respectively. For example, the common complete solid solution metal may comprise nickel.

The present invention provides a copper-nickel alloy electroplating bath which is characterized by containing (a) a copper salt and a nickel salt, (b) a metal complexing agent, (c) a plurality of conductivity-imparting salts that are different from each other, (d) a compound that is selected from the group consisting of disulfide compounds, sulfur-containing amino acids and salts of these compounds, (e) a compound that is selected from the group consisting of sulfonic acid compounds, sulfimide compounds, sulfamic acid compounds, sulfone amides and salts of these compounds, and (f) a reaction product of a glycidyl ether and a polyhydric alcohol. This copper-nickel alloy electroplating bath is also characterized by having a pH of 3-8.