Polycrystalline diamond composites (PCD) were obtained by infiltration of cobalt from a hard-alloy substrate into a porous diamond layer at a temperature of 1600 ° C and a pressure of 6.0 GPa in a cubic compression press. In order to improve the thermal stability of the composite, the top layer of cobalt was etched with hydrofluoric acid to a depth of 150 ?m. Transmission electron microscopy (TEM) was used to analyze the interaction at the grain-bond and grain-grain interface. After the infiltration of cobalt at the grain boundaries, the grain binder contains phases of nanodiamond and cubic cobalt carbide C o C x , while after etching of cobalt in the surface layer of a sintered polycrystalline diamond composite zita found bulbous structures
Cand. tech. Sciences A. S. ANOKHIN
1 (
e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it. ), Cand. tech. sciences. S. S. STRELNIKOVA
1 , Cand. tech. sciences. M. A. ANDRIANOV
2 , V. V. TKACHENKO
2 , A. N. SHIPKOV
2 , E. V. KUKUEVA
3 , Cand. chem. Sciences A. E. GOLDT
4 , OT ZAREMBA
4 ;
1 FGBUN & # 171; Institute of Metallurgy and Materials Science named after A. A. Baykov of the Russian Academy of Sciences & # 187; (IMET RAS) (Russia, Moscow)
2 LLC & # 171; Microbor Composite & # 187; (Russia, Moscow)
3 SRC & # 171; Kurchatov Institute & # 187; (Russia, Moscow)
4 Skolkovo Institute of Science and Technology (Skoltech) (Russia, Moscow)
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