Influence of Additives of Carbon Nanotubes on the Structure and Properties of Metal Binders for a Diamond Tool

摘要

The possibility of alloying the powder alloy of the Fe-Cu—Co—Sn system with multilayered carbon nanotubes (MCNTs) in orderto form a dispersion-hardened composite material with improved mechanical and tribological properties, which can be used as a binder for a diamond cutting tool, is considered. The mixing mode of carbon nanotubes with the starting powder binder is selected. The dependence of physico-chemical properties of the composite material on the MCNT content is investigated in a range of 0.01—3%. The composite binders with the optimal MCNT content at a level of 0.01 % are fabricated. The alloy is characterized by improved mechanical properties; namely, hardness increases by 9-11 HRB units and the bending strength for three-point bending increases by 100 MPa.