The influence of morphology and composition of metal–carbide coatings deposited on the diamond surface on the properties of copper–diamond composites

Arina V. Ukhina, Dina V. Dudina, Maksim A. Esikov, Dmitrii A. Samoshkin, Sergei V. Stankus, Ivan N. Skovorodin, Evgeny N. Galashov, Boris B. Bokhonov

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

In this work, tungsten- and molybdenum-containing coatings on diamond were obtained by rotary chemical vapor deposition (RCVD) or by treating the diamond microcrystals in a hot press (HP)/spark plasma sintering (SPS) facility. In the HP facility, heating was realized by external heating elements; no electric current was passing through or induced in the die. In RCVD, tungsten carbonyl W(CO)6 was used as a precursor. In the case of HP and SPS, powders of tungsten, molybdenum and tungsten trioxide WO3 were used as sources of the metal. It was found that the morphology and phase composition of the coatings depend on the deposition conditions and the metal source. HP and SPS were further used for fabricating bulk copper–50 vol% diamond composites. The thermal conductivity of the copper–diamond composites decreased as the holding time during their consolidation by HP or SPS increased owing to delamination of the WC coating from the diamond surface. A Mo-containing coating deposited by the SPS treatment allowed obtaining a copper–diamond composite with a thermal conductivity of 420 W m−1 K−1.

Original languageEnglish
Article number126272
Number of pages10
JournalSurface and Coatings Technology
Volume401
DOIs
Publication statusPublished - 15 Nov 2020

Keywords

  • Coating
  • Copper–diamond composite
  • Microstructure
  • Thermal conductivity
  • MOLYBDENUM
  • Copper-diamond composite
  • THERMAL-CONDUCTIVITY
  • MECHANICAL-PROPERTIES
  • LAYERS
  • GRITS
  • TUNGSTEN
  • POWDER
  • MICROSTRUCTURE

Fingerprint

Dive into the research topics of 'The influence of morphology and composition of metal–carbide coatings deposited on the diamond surface on the properties of copper–diamond composites'. Together they form a unique fingerprint.

Cite this