Hybrid Ti-MoS2 Coatings for Dry Machining of Aluminium Alloys
Combinatorial deposition, comprising filtered cathodic vacuum arc (FCVA) and physical vapor deposition (PVD) magnetron sputtering is employed to deposit molybdenum disulphide (MoS2) and titanium (Ti) thin films onto TiB2-coated tool inserts specifically designed for the dry machining of aluminium al...
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doaj-fecb0138edf14d43be816f97111cbf8f2020-11-25T00:52:59ZengMDPI AGCoatings2079-64122017-09-017914910.3390/coatings7090149coatings7090149Hybrid Ti-MoS2 Coatings for Dry Machining of Aluminium AlloysTomasz L. Brzezinka0Jeff Rao1Mohamad Chowdhury2Joern Kohlscheen3German S. Fox Rabinovich4Stephen C. Veldhuis5Jose L. Endrino6Surface Engineering and Nanotechnology Institute (SENTi), Cranfield University, Cranfield MK43 0AL, UKSurface Engineering and Nanotechnology Institute (SENTi), Cranfield University, Cranfield MK43 0AL, UKDepartment of Mechanical Engineering, McMaster University, 1280 Main St. W., Hamilton, ON L8S4L7, CanadaKennametal Shared Services Gmbh, Altweiherstr 27-31, Ebermannstadt 91320, GermanyDepartment of Mechanical Engineering, McMaster University, 1280 Main St. W., Hamilton, ON L8S4L7, CanadaDepartment of Mechanical Engineering, McMaster University, 1280 Main St. W., Hamilton, ON L8S4L7, CanadaSurface Engineering and Nanotechnology Institute (SENTi), Cranfield University, Cranfield MK43 0AL, UKCombinatorial deposition, comprising filtered cathodic vacuum arc (FCVA) and physical vapor deposition (PVD) magnetron sputtering is employed to deposit molybdenum disulphide (MoS2) and titanium (Ti) thin films onto TiB2-coated tool inserts specifically designed for the dry machining of aluminium alloys. Titanium is deposited by FCVA while MoS2 is magnetron sputtered. The deposition set up allows several compositions of Ti-MoS2 to be deposited simultaneously, with Ti content ranging between 5 and 96 at. %, and their machining performances to be evaluated. Milling took place using a CNC Vertical Machining Center at a 877 mm/min feed rate. The effect of different coating compositional ratios on the degree of aluminium sticking when a milling insert is used to face mill an Al alloy (SAE 6061) was investigated using a combination of energy-dispersive X-ray spectroscopy (EDX) and X-ray photoelectron spectroscopy (XPS) analysis. XPS studies suggest that the greater degree of Al sticking on the rake face of the inserts is due to the formation of greater amounts of non-protective Ti-O phases. EDX mapping of the milling inserts after machining reveal that a Ti:MoS2 ratio of around 0.39 prevents Al from sticking to the tool edges. Since we prevent Al from sticking to the tool surface, the resultant machined surface finish is improved thus validating the machining performance of TiB2-coated tools using optimum compositions of Ti:MoS2 thin film coatings.https://www.mdpi.com/2079-6412/7/9/149self-lubricating compositesmolybdenum disulphideSEMEDSXPSmillingaluminium |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Tomasz L. Brzezinka Jeff Rao Mohamad Chowdhury Joern Kohlscheen German S. Fox Rabinovich Stephen C. Veldhuis Jose L. Endrino |
spellingShingle |
Tomasz L. Brzezinka Jeff Rao Mohamad Chowdhury Joern Kohlscheen German S. Fox Rabinovich Stephen C. Veldhuis Jose L. Endrino Hybrid Ti-MoS2 Coatings for Dry Machining of Aluminium Alloys Coatings self-lubricating composites molybdenum disulphide SEM EDS XPS milling aluminium |
author_facet |
Tomasz L. Brzezinka Jeff Rao Mohamad Chowdhury Joern Kohlscheen German S. Fox Rabinovich Stephen C. Veldhuis Jose L. Endrino |
author_sort |
Tomasz L. Brzezinka |
title |
Hybrid Ti-MoS2 Coatings for Dry Machining of Aluminium Alloys |
title_short |
Hybrid Ti-MoS2 Coatings for Dry Machining of Aluminium Alloys |
title_full |
Hybrid Ti-MoS2 Coatings for Dry Machining of Aluminium Alloys |
title_fullStr |
Hybrid Ti-MoS2 Coatings for Dry Machining of Aluminium Alloys |
title_full_unstemmed |
Hybrid Ti-MoS2 Coatings for Dry Machining of Aluminium Alloys |
title_sort |
hybrid ti-mos2 coatings for dry machining of aluminium alloys |
publisher |
MDPI AG |
series |
Coatings |
issn |
2079-6412 |
publishDate |
2017-09-01 |
description |
Combinatorial deposition, comprising filtered cathodic vacuum arc (FCVA) and physical vapor deposition (PVD) magnetron sputtering is employed to deposit molybdenum disulphide (MoS2) and titanium (Ti) thin films onto TiB2-coated tool inserts specifically designed for the dry machining of aluminium alloys. Titanium is deposited by FCVA while MoS2 is magnetron sputtered. The deposition set up allows several compositions of Ti-MoS2 to be deposited simultaneously, with Ti content ranging between 5 and 96 at. %, and their machining performances to be evaluated. Milling took place using a CNC Vertical Machining Center at a 877 mm/min feed rate. The effect of different coating compositional ratios on the degree of aluminium sticking when a milling insert is used to face mill an Al alloy (SAE 6061) was investigated using a combination of energy-dispersive X-ray spectroscopy (EDX) and X-ray photoelectron spectroscopy (XPS) analysis. XPS studies suggest that the greater degree of Al sticking on the rake face of the inserts is due to the formation of greater amounts of non-protective Ti-O phases. EDX mapping of the milling inserts after machining reveal that a Ti:MoS2 ratio of around 0.39 prevents Al from sticking to the tool edges. Since we prevent Al from sticking to the tool surface, the resultant machined surface finish is improved thus validating the machining performance of TiB2-coated tools using optimum compositions of Ti:MoS2 thin film coatings. |
topic |
self-lubricating composites molybdenum disulphide SEM EDS XPS milling aluminium |
url |
https://www.mdpi.com/2079-6412/7/9/149 |
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