Wear resistance of diamond-dolomite and diamond-strontium carbonate composites produced under hpht-conditions

  • N. A. Bondarenko V. N. Bakul Institute for superhard materials NAS of Ukraine
  • A. S. Osipov V. N. Bakul Institute for superhard materials NAS of Ukraine
  • A. M. Isonkin V. N. Bakul Institute for superhard materials NAS of Ukraine
  • Yu. A. Melniichuk V. N. Bakul Institute for superhard materials NAS of Ukraine
  • A. I. Bykov I. N. Frantsevich Institut for Problems of Material Sciences NAS of Ukraine
Keywords: diamond, dolomite, strontium carbonate, high pressure, turning, wear, wear resistance

Abstract

Composites based on diamond in the systems of diamond-dolomite and diamond-SrCO3 were obtained under high pressure (8.0 GPa) and high temperature (2100°C). Technique of X-ray diffraction analysis and scanning electron microscopy were determined content and structural features of the composites. Performance testing of composite cutters and PCD samples were carried out at the turning of granite and hard alloy WC/15 mas.%Co. It was found that all samples with contain two phases have a diamond frame and macroinclusions of the carbonate phase (8.5-8.8 vol.%). It has been established that the wear resistance of diamond-SrCO3 samples corresponds to the wear resistance of PCD while machining hard alloy WC/15 mas.%Co and exceeds it during granite processing. In two types of tests, the diamond-dolomite composite composites demonstrated the maximum wear resistance, cutting edge being 30-50% lower than in the PCD samples

Published
2018-06-12
Issue
Vol 21 (2018): Rock Destruction and Metal-Working Tools – Techniques and Technology of the Tool Production and Applications
Section
Instrumental, structural and functional materials based on diamond and cubic bor