| abstract |
A cubic boron nitride sintered body comprising 30% by volume or more and 99.9% by volume or less of cubic boron nitride particles and 0.1% by volume or more and 70% by volume or less of a bonding phase, wherein the bonding phase is a group 4 element or a group 5 element of the periodic table , Group 6 elements, containing at least one selected from the group consisting of monoliths, alloys, and intermetallic compounds selected from the group consisting of aluminum, silicon, cobalt and nickel, or Group 4 elements of the periodic table, Group 5 Elements, a group 6 element, a compound comprising at least one element selected from the group consisting of aluminum, silicon, cobalt and nickel, and at least one element selected from the group consisting of nitrogen, carbon, boron and oxygen, and the compound A single substance or alloy containing at least one selected from the group consisting of a solid solution derived from , at least one element selected from the group consisting of intermetallic compounds, and at least one element selected from the group consisting of a group 4 element, a group 5 element, a group 6 element, aluminum, silicon, cobalt, and nickel of the periodic table and at least one selected from the group consisting of a compound consisting of at least one element selected from the group consisting of nitrogen, carbon, boron and oxygen, and a solid solution derived from the compound, wherein the carbon content of the cubic boron nitride particles is 0.08 % by mass or less, and the cubic boron nitride sintered body does not contain free carbon. |