| 摘要 |
<p>[Problem] To provide a surface-coated member in which the coating layer has high oxidation resistance and high chipping resistance. [Solution] A surface-coated member, e.g., a cutting tool (1), that comprises a base (2) having a surface coated with a coating layer (6) which is composed of first layers (7) comprising (TiaAlbMd)N (wherein M is one or more elements selected from the metals in Groups 4, 5, and 6 of the periodic table, excluding Ti, and from Si and Y, 0.1=aeAlfMg)N (wherein 0.4=e=1, 0=f=0.6, and 0=g=0.2), the layers (7) and the layers (8) having been alternately superposed. The coating layer (6) gives an X-ray diffraction pattern in which diffraction peaks pc assigned to cubic crystals coexist with diffraction peaks ph assigned to hexagonal crystals, and in which the diffraction angle (2?hm) of a diffraction peak ph assigned to hexagonal crystals has shifted from the diffraction angle (2?hs) of the X-ray diffraction peak assigned to hexagonal AlN according to the JCPDS card, toward the smaller-angle side in an amount that is larger by 0.1-5.0º than the difference between the diffraction angle (2?ch) of an X-ray diffraction peak assigned to cubic TiN according to the JCPDS card and the diffraction angle (2?cm) of the diffraction peak pc assigned to cubic crystals.</p> |
