A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
CUTTING TOOL
Fracture resistance of a cutting tool is enhanced. A cutting tool (1) is formed of a silicon nitride-based sintered body (2) including a matrix phase (3), a hard phase (4), and a grain boundary phase (10) in which a glass phase (11) and a crystal phase (12) exist. The silicon nitride-based sintered body (2) contains yttrium such that a content of the yttrium is not less than 5.0 wt% and not greater than 15.0 wt% in terms of an oxide, and contains titanium nitride as the hard phase (4) such that a content of the titanium nitride is not less than 5.0 wt% and not greater than 25.0 wt%. In an X-ray diffraction peak, a halo pattern appears at 2θ ranging from 25° to 35° in an internal region of the silicon nitride-based sintered body (2). A ratio B/A of a maximum peak intensity B to a maximum peak intensity A satisfies a relationship represented by Expression (1) in a surface region of the silicon nitride-based sintered body (2), and satisfies a relationship represented by Expression (2) in the internal region of the silicon nitride-based sintered body (2). 0.11≤B/A≤0.400.00≤B/A<0.10
CUTTING TOOL
Fracture resistance of a cutting tool is enhanced. A cutting tool (1) is formed of a silicon nitride-based sintered body (2) including a matrix phase (3), a hard phase (4), and a grain boundary phase (10) in which a glass phase (11) and a crystal phase (12) exist. The silicon nitride-based sintered body (2) contains yttrium such that a content of the yttrium is not less than 5.0 wt% and not greater than 15.0 wt% in terms of an oxide, and contains titanium nitride as the hard phase (4) such that a content of the titanium nitride is not less than 5.0 wt% and not greater than 25.0 wt%. In an X-ray diffraction peak, a halo pattern appears at 2θ ranging from 25° to 35° in an internal region of the silicon nitride-based sintered body (2). A ratio B/A of a maximum peak intensity B to a maximum peak intensity A satisfies a relationship represented by Expression (1) in a surface region of the silicon nitride-based sintered body (2), and satisfies a relationship represented by Expression (2) in the internal region of the silicon nitride-based sintered body (2). 0.11≤B/A≤0.400.00≤B/A<0.10
CUTTING TOOL
SCHNEIDWERKZEUG
OUTIL DE COUPE
TODA TATSUYA (author) / FURUHASHI TAKUYA (author) / TOYODA RYOJI (author)
2024-01-24
Patent
Electronic Resource
English