This disclosure relates to a polycrystalline cubic boron nitride, PCBN, material that includes a binder matrix material containing nitride compounds. The nitride compounds are selected from HfN, VN, and/or NbN.

In the joined body (10) in which the conductor (12) and the substrate (14) are joined by the joining material (13), the joining material (13) includes a sintered body formed by sintering silver powder. A sintered body having a porosity of 8% to 30% and a surface roughness Ra of a joining surface of 500 nm or more and 3.3 μm or less is adopted.

In the joined body (10) in which the conductor (12) and the substrate (14) are joined by the joining material (13), the joining material (13) includes a sintered body formed by sintering silver powder. A sintered body having a porosity of 8% to 30% and a surface roughness Ra of a joining surface of 500 nm or more and 3.3 μm or less is adopted.

A method of producing a composite material, the method including: preparing a mixed powder of diamond particles and copper powder particles; and generating a composite material containing diamond and copper from the mixed powder by pulsed electric current sintering with a pressure of 5 MPa or greater and 100 MPa or less applied to the mixed powder, and the mixed powder maintained at a temperature equal to or higher than 500° C. and lower than 800° C.

A method of producing a composite material, the method including: preparing a mixed powder of diamond particles and copper powder particles; and generating a composite material containing diamond and copper from the mixed powder by pulsed electric current sintering with a pressure of 5 MPa or greater and 100 MPa or less applied to the mixed powder, and the mixed powder maintained at a temperature equal to or higher than 500° C. and lower than 800° C.

A method of producing a composite material, the method including: preparing a mixed powder of diamond particles and copper powder particles; and generating a composite material containing diamond and copper from the mixed powder by pulsed electric current sintering with a pressure of 5 MPa or greater and 100 MPa or less applied to the mixed powder, and the mixed powder maintained at a temperature equal to or higher than 500° C. and lower than 800° C.

This disclosure relates to a polycrystalline cubic boron nitride, PCBN, composite material comprising cubic boron nitride, cBN, particles and a binder matrix material in which the cBN particles are dispersed. The binder matrix material comprises one or more superalloys.

This disclosure relates to a polycrystalline cubic boron nitride, PCBN, composite material comprising cubic boron nitride, cBN, particles and a binder matrix material in which the cBN particles are dispersed. The binder matrix material comprises one or more superalloys.

A conductive supporting member includes an outer portion that includes a Cu matrix phase and a second phase dispersed in the Cu matrix phase and containing a Cu—Zr compound and that has an alloy composition represented by Cu-xZr (x is atomic % of Zr and 0.5≤x≤16.7 is satisfied) and an inner portion that is present on an inner side of the outer portion, is formed of a metal containing Cu, and has higher conductivity than the outer portion.

A conductive supporting member includes an outer portion that includes a Cu matrix phase and a second phase dispersed in the Cu matrix phase and containing a Cu—Zr compound and that has an alloy composition represented by Cu-xZr (x is atomic % of Zr and 0.5≤x≤16.7 is satisfied) and an inner portion that is present on an inner side of the outer portion, is formed of a metal containing Cu, and has higher conductivity than the outer portion.