| abstract |
A cubic boron nitride sintered body comprising more than 80% by volume and less than 100% by volume of cubic boron nitride particles, and more than 0% by volume and less than 20% by volume 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 A compound comprising at least one element selected from the group consisting of elements, group 6 elements, 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 Group 4 elements, Group 5 elements, Group 6 elements, aluminum, silicon, cobalt, and nickel of the periodic table and a compound comprising at least one element selected from the group consisting of nitrogen, carbon, boron and oxygen, and at least one selected from the group consisting of a solid solution derived from the compound, wherein the dislocation density of the cubic boron nitride particles is 1×10 15 /m 2 or more and 1×10 17 /m 2 or less. |