Improvement to the adhesion of polycrystalline diamond films on WC-Co cemented carbides through ion etching of loosely bound growth centers

S. A. Linnik, A. V. Gaydaychuk, V. V. Okhotnikov

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Carbide cutting tools with CVD diamond coatings are one of the most promising combinations for machining applications because of their exceptional durability in the processing of hard-to-treat materials. In the current work, we investigated a new technique to increase diamond coating adhesion to WC-Co substrates, based on the principle of removing loosely bound nanodiamond growth centers (the cause of regions with low adhesion for the growing coating) from the substrate surface using ion etching. As a result, well-adherent coatings were obtained with a columnar microstructure and thickness up to 40 μm. We also investigated the evolution of density variation of the growth centers for various ion fluxes and exposure time. The difference in mechanisms of diamond coating delamination from substrates without ion etching pretreatment and after pretreatment was also examined. Comparative measurements of coating adhesion by the Rockwell adhesion testing methods and determinations of the self-detachment thickness were made. The relative simplicity, low energy consumption and high efficiency of this method make it attractive for both industrial and scientific applications.

Original languageEnglish
Pages (from-to)227-232
Number of pages6
JournalSurface and Coatings Technology
Volume334
DOIs
Publication statusPublished - 25 Jan 2018

Fingerprint

Diamond films
diamond films
carbides
Carbides
Etching
adhesion
Adhesion
etching
Ions
coatings
Coatings
Diamond
Diamonds
ions
diamonds
pretreatment
Substrates
Carbide cutting tools
Nanodiamonds
energy consumption

Keywords

  • Adhesion
  • CVD diamond
  • Surface pretreatment
  • WC-Co cutting tools

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

@article{18b43c3108394196a3d27b2f66effa40,
title = "Improvement to the adhesion of polycrystalline diamond films on WC-Co cemented carbides through ion etching of loosely bound growth centers",
abstract = "Carbide cutting tools with CVD diamond coatings are one of the most promising combinations for machining applications because of their exceptional durability in the processing of hard-to-treat materials. In the current work, we investigated a new technique to increase diamond coating adhesion to WC-Co substrates, based on the principle of removing loosely bound nanodiamond growth centers (the cause of regions with low adhesion for the growing coating) from the substrate surface using ion etching. As a result, well-adherent coatings were obtained with a columnar microstructure and thickness up to 40 μm. We also investigated the evolution of density variation of the growth centers for various ion fluxes and exposure time. The difference in mechanisms of diamond coating delamination from substrates without ion etching pretreatment and after pretreatment was also examined. Comparative measurements of coating adhesion by the Rockwell adhesion testing methods and determinations of the self-detachment thickness were made. The relative simplicity, low energy consumption and high efficiency of this method make it attractive for both industrial and scientific applications.",
keywords = "Adhesion, CVD diamond, Surface pretreatment, WC-Co cutting tools",
author = "Linnik, {S. A.} and Gaydaychuk, {A. V.} and Okhotnikov, {V. V.}",
year = "2018",
month = "1",
day = "25",
doi = "10.1016/j.surfcoat.2017.11.043",
language = "English",
volume = "334",
pages = "227--232",
journal = "Surface and Coatings Technology",
issn = "0257-8972",
publisher = "Elsevier",

}

TY - JOUR

T1 - Improvement to the adhesion of polycrystalline diamond films on WC-Co cemented carbides through ion etching of loosely bound growth centers

AU - Linnik, S. A.

AU - Gaydaychuk, A. V.

AU - Okhotnikov, V. V.

PY - 2018/1/25

Y1 - 2018/1/25

N2 - Carbide cutting tools with CVD diamond coatings are one of the most promising combinations for machining applications because of their exceptional durability in the processing of hard-to-treat materials. In the current work, we investigated a new technique to increase diamond coating adhesion to WC-Co substrates, based on the principle of removing loosely bound nanodiamond growth centers (the cause of regions with low adhesion for the growing coating) from the substrate surface using ion etching. As a result, well-adherent coatings were obtained with a columnar microstructure and thickness up to 40 μm. We also investigated the evolution of density variation of the growth centers for various ion fluxes and exposure time. The difference in mechanisms of diamond coating delamination from substrates without ion etching pretreatment and after pretreatment was also examined. Comparative measurements of coating adhesion by the Rockwell adhesion testing methods and determinations of the self-detachment thickness were made. The relative simplicity, low energy consumption and high efficiency of this method make it attractive for both industrial and scientific applications.

AB - Carbide cutting tools with CVD diamond coatings are one of the most promising combinations for machining applications because of their exceptional durability in the processing of hard-to-treat materials. In the current work, we investigated a new technique to increase diamond coating adhesion to WC-Co substrates, based on the principle of removing loosely bound nanodiamond growth centers (the cause of regions with low adhesion for the growing coating) from the substrate surface using ion etching. As a result, well-adherent coatings were obtained with a columnar microstructure and thickness up to 40 μm. We also investigated the evolution of density variation of the growth centers for various ion fluxes and exposure time. The difference in mechanisms of diamond coating delamination from substrates without ion etching pretreatment and after pretreatment was also examined. Comparative measurements of coating adhesion by the Rockwell adhesion testing methods and determinations of the self-detachment thickness were made. The relative simplicity, low energy consumption and high efficiency of this method make it attractive for both industrial and scientific applications.

KW - Adhesion

KW - CVD diamond

KW - Surface pretreatment

KW - WC-Co cutting tools

UR - http://www.scopus.com/inward/record.url?scp=85034629333&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85034629333&partnerID=8YFLogxK

U2 - 10.1016/j.surfcoat.2017.11.043

DO - 10.1016/j.surfcoat.2017.11.043

M3 - Article

VL - 334

SP - 227

EP - 232

JO - Surface and Coatings Technology

JF - Surface and Coatings Technology

SN - 0257-8972

ER -