Cubic boron nitride sintered material and tool

Cubic boron nitride sintered material, comprising cubic boron nitride particles;

• a binder phase;
• and a first phase,
• wherein a content of the cubic boron nitride particles in the cubic boron nitride sintered material is 25% by volume or more and 80% by volume or less,
• the binder phase comprises either or both of
• one or more first compounds consisting of at least one element selected from the group consisting of titanium, zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum, aluminum, and silicon, and at least one element selected from the group consisting of nitrogen, carbon, boron, and oxygen, and
• a solid solution derived from the one or more first compounds,
• the first phase comprises cobalt, tungsten, and at least one first element selected from the group consisting of titanium, zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum, aluminum, silicon, nitrogen, carbon, boron, and oxygen,
• a total content of cobalt and tungsten in the cubic boron nitride sintered material is 1.0% by mass or more and 6.0% by mass or less,
• the binder phase consists of multiple binder phase particles, including first binder phase particles, wherein the first binder phase particles constitute 50% or more of the multiple binder phase particles on a number basis,
• wherein the first binder phase particles are defined as the multiple binder phase particles for which 50% or more of the surface area of the multiple binder phase particles is in contact with the first phase.