Effect of diamond particle size on the microstructure and wear property of high pressure high temperature (HPHT) sintered polycrystalline diamond compact (PDC)

Min Seok Baek, Hee Sub Park, Jae Il Lee, Kee Ahn Lee

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

A polycrystalline diamond compact (PDC) is a two-stage sintered body manufactured by placing diamond powders on a WOCo hard material and then applying the high pressure high temperature (HPHT) sintering process. This study investigated the microstructure and wear properties of the PDC depending on initial diamond particle size. Three different sizes (12-22 μn, 10-20 μm, and 8-16 um) of initial diamond powders were used to manufacture PDCs with the HPHT sintering process. Some Co and WC were observed along the boundaries between the diamond particles in the three manufactured PDCs. The diamond layer formed using small diamond particles showed finer and more even area distribution of Co along the diamond particles. VTL equipment was used to conduct a granite cutting wear test. The result confirmed that smaller initial diamond particle size leads to greater wear resistance properties. Observation of the PDC wear surface confirmed that the PDC made with larger diamond particles was more prone to be weak along the boundaries between the diamond particles, and there were instances where the diamond particles were displaced as a whole.

Original languageEnglish
Pages (from-to)790-797
Number of pages8
JournalJournal of Korean Institute of Metals and Materials
Volume55
Issue number11
DOIs
StatePublished - Nov 2017

Bibliographical note

Publisher Copyright:
Copyright © The Korean Institute of Metals and Materials.

Keywords

  • Diamond particle size
  • High temperature high pressure sintering
  • Microstructure
  • Polycrystalline diamond
  • Wear

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