Sintered body and cutting tool
A sintered body and cutting tool, the sintered body ( 2 ) including: a first hard particle ( 10 ) containing TiCN; a second hard particle ( 20 ) containing (Ti, M) (C, N); a third hard particle ( 30 ) including a core portion ( 31 ) containing TiCN, and a peripheral portion ( 32 ) enclosing the core portion ( 31 ) and containing (Ti, M) (C, N) each as main components; a particle ( 40 ) containing at least one of Al, Zr, and Si; and a binding phase ( 50 ) containing at least one of Co and Ni and at least one of Re and Ru, and has a thickness of not greater than 5 nm. The third hard particle ( 30 ) has, in the core portion ( 31 ), a particle ( 33 ) containing at least one selected from Co, Ni, Re, and Ru, and has a dislocation ( 34 ) in each of the core portion ( 31 ) and the peripheral portion ( 32 ).
1 . A sintered body comprising:
a first hard particle containing TiCN as a main component;
a second hard particle containing, as a main component, Ti, M, C, and N, wherein M represents one or more elements selected from group 4 to group 6 elements (excluding Ti element) in a periodic table;
a third hard particle including a core portion containing TiCN as a main component, and a peripheral portion enclosing the core portion and containing, as a main component, Ti, M, C, and N, wherein M represents one or more elements selected from group 4 to group 6 elements (excluding Ti element) in the periodic table;
a particle containing at least one of AlN, Al 2 O 3 , ZrO 2 , SiC, and Si 3 N 4 as a main component; and
a binding phase containing at least one of Co and Ni, wherein
the binding phase
further contains at least one of Re and Ru, and
has a thickness of not greater than 5 nm at at least a part of a grain boundary between the third hard particles adjacent to each other, and
at least one of the third hard particles
has, in the core portion, a particle containing at least one selected from Co, Ni, Re, and Ru, and
has at least one dislocation in each of the core portion and the peripheral portion.
2 . The sintered body according to claim 1 , wherein the binding phase further contains Mo.
3 . A cutting tool comprising the sintered body according to claim 1 .
4 . The cutting tool according to claim 3 , comprising a coating layer on a surface.
5 . The sintered body according to claim 1 , wherein M is selected from the group consisting of Ta, Nb, W, V, Cr, Zr, Mo, and Hf.
6 . The sintered body according to claim 1 , wherein M is selected from the group consisting of Ta, Nb, and W.