Effect of Hot Post-Pressing Parameters on the Structure and Properties of Diamond-(Fe-Cu-Ni-Sn-CrB₂) Composites

Abstract

The paper explains the mechanisms whereby components in the diamond - (Fe-Cu-Ni-Sn-CrB₂) system and products of their interaction influence the micro- and nanostructure as well as mechanical properties of the composites sintered in molds in a muffle furnace followed by hot pressing. The p–t parameters of hot post-pressing that provide decarburi-zation in the diamondmatrix transition zone by forming Fe₃C, Cr₃C₂, Cr₇C₃ and Cr_1,65Fe_0,35B_0,95 layers are determined. The wear resistance of these composites is three times as high as that of the samples produced from feedstock without chromium diboride.