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6CCVD Research

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

At a Glance

Section titled “At a Glance”
MetadataDetails
Publication Date2017-10-03
JournalCoatings
AuthorsMohammadmehdi Shabani, Joaquim Sacramento, F.J. Oliveira, R.F. Silva
InstitutionsUniversity of Aveiro
Citations18

Abstract

Section titled “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 ”m and 24 ”m were produced and used in turning: cutting speed (v) of 250 to 1000 m·min−1; depth of cut (DOC) from 0.5 to 3 mm and feed (f) between 0.1 and 0.4 mm·rev−1. The main cutting force increases linearly with DOC (ca. 294 N per mm) and with feed (ca. 640 N per mm·rev−1). The thicker coatings work within the following limits: DOC up to 1.5 mm and maximum speeds of 750 m·min−1 for feeds up to 0.4 mm·rev−1. 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.

Tech Support

Section titled “Tech Support”

Original Source

Section titled “Original Source”

References

Section titled “References”
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  3. 1998 - Machining of Al/SiC particulate metal-matrix composites. Part I: Tool performance [Crossref]
  4. 1995 - Case Study—Machinability of a silicon carbide reinforced matrix composite aluminium metal [Crossref]
  5. 1999 - Cutting applications of DLC, hard carbon and diamond films [Crossref]
  6. 2001 - Turning of metal matrix composites [Crossref]
  7. 2001 - Spanende Bearbeitung von Bauteilen aus Al-Matrix-Verbundwerkstoffen (Machining of Components of Al Matrix Composites) [Crossref]
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  9. 2005 - CVD diamond tool performance in metal matrix composite machining [Crossref]
  10. 2015 - Temperature-Dependent Fatigue Strength of Diamond Coating-Substrate Interface Quantified via the Shear Failure Stress [Crossref]

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