Next Article in Journal
A Novel Image Segmentation Approach for Microstructure Modelling
Next Article in Special Issue
Surface Texturing of CVD Diamond Assisted by Ultrashort Laser Pulses
Previous Article in Journal
Chemical Vapor Deposition of Bi-Te-Ni-Fe on Magnesium Oxide Substrate and Its Seebeck Effect
Previous Article in Special Issue
A Guide to and Review of the Use of Multiwavelength Raman Spectroscopy for Characterizing Defective Aromatic Carbon Solids: from Graphene to Amorphous Carbons
Article Menu
Issue 10 (October) cover image

Export Article

Open AccessArticle
Coatings 2017, 7(10), 165; doi:10.3390/coatings7100165

Multilayer CVD Diamond Coatings in the Machining of an Al6061-15 Vol % Al2O3 Composite

1
CICECO—Aveiro Institute of Materials, Department of Materials and Ceramic Engineering, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
2
Durit-Metalurgia Portuguesa do Tungsténio, Lda., Apartado 24, 3854-909 Albergaria-a-Velha, Portugal
3
Higher School of Technology and Management at Águeda, University of Aveiro, Apartado 473, 3754-909 Águeda, Portugal
*
Author to whom correspondence should be addressed.
Academic Editor: Ivan Buijnsters
Received: 14 July 2017 / Revised: 26 September 2017 / Accepted: 1 October 2017 / Published: 3 October 2017
View Full-Text   |   Download PDF [3949 KB, uploaded 10 October 2017]   |  

Abstract

Ceramic cutting inserts coated with ten-fold alternating micro- and nanocrystalline diamond (MCD/NCD) layers grown by hot filament chemical vapor deposition (CVD) were tested in the machining of an Al based metallic matrix composite (MMC) containing 15 vol % Al2O3 particles. Inserts with total coating thicknesses of approximately 12 µm and 24 µm were produced and used in turning: cutting speed (v) of 250 to 1000 m·min1; depth of cut (DOC) from 0.5 to 3 mm and feed (f) between 0.1 and 0.4 mm·rev1. The main cutting force increases linearly with DOC (ca. 294 N per mm) and with feed (ca. 640 N per mm·rev1). The thicker coatings work within the following limits: DOC up to 1.5 mm and maximum speeds of 750 m·min1 for feeds up to 0.4 mm·rev1. Flank wear is predominant but crater wear is also observed due to the negative tool normal rake. Layer-by-layer wear of the tool rake, and not total delamination from the substrate, evidenced one of the advantages of using a multilayer design. The MCD/NCD multilayer diamond coated indexable inserts have longer tool life than most CVD diamond systems and behave as well as most polycrystalline diamond (PCD) tools. View Full-Text
Keywords: CVD diamond; multilayer coating; turning; MMC; tool wear CVD diamond; multilayer coating; turning; MMC; tool wear
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Shabani, M.; Sacramento, J.; Oliveira, F.J.; Silva, R.F. Multilayer CVD Diamond Coatings in the Machining of an Al6061-15 Vol % Al2O3 Composite. Coatings 2017, 7, 165.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Coatings EISSN 2079-6412 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top