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6CCVD Research

An Experimental Study on Nano-Carbon Films as an Anti-Wear Protection for Drilling Tools

At a Glance

Section titled ā€œAt a Glanceā€
MetadataDetails
Publication Date2017-12-11
JournalCoatings
AuthorsC. Popescu, Dan Cristea, Bogdan Biță, R. Cristescu, D. CrĒŽciun
InstitutionsNational Institute for Laser Plasma and Radiation Physics, Transylvania University of Brașov
Citations12

Abstract

Section titled ā€œAbstractā€

Carbon thin films of 50-100 nm thickness were synthesized by Pulsed Laser Deposition in vacuum at different laser fluences from 2 to 6 J/cm2. The deposited films were characterized by Raman spectroscopy for compositional assessment, scanning electron microscopy for morphology/thickness evaluations, and X-ray reflectivity for density, thickness, and roughness determinations. The films were ~100 nm thin, smooth, droplet-free, made of a-C:H type of diamond-like carbon. The mechanical properties of synthesized films were studied by nanoindentation and adhesion tests. The films that were obtained at low laser fluences (2, 3 J/cm2) had better mechanical properties as compared to those synthesized at higher fluences. The mean values of hardness were around 20 GPa, while the friction coefficient was 0.06. The deposition conditions of carbon thin films that displayed the best mechanical properties were further used to coat commercial drills. Both uncoated and coated drills were tested on plates that were made of three types of steel: Stainless steel 304, general use AISI 572 Gr 65 steel (OL60), and AISI D3 tool steel (C120). All of the drill edges and tips were studied by optical and scanning electron microscopes. The coated samples were clearly found to be more resistant, and displayed less morphological defects than their uncoated counterparts when drilling stainless steel and OL60 plates. In the case of C120 steel, carbon coatings failed because of the high friction between drill and the metal plate resulting in tip edges blunting that occurred during processing.

Tech Support

Section titled ā€œTech Supportā€

Original Source

Section titled ā€œOriginal Sourceā€

References

Section titled ā€œReferencesā€
  1. 2002 - Diamond-like amorphous carbon [Crossref]
  2. 2016 - Microstructure and property of diamond-like carbon films with Al and Cr co-doping deposited using a hybrid beams system [Crossref]
  3. 2015 - The role of ambient gas and pressure on the structuring of hard diamond-like carbon films synthesized by pulsed laser deposition [Crossref]
  4. 2015 - High energy radial deposition of diamond-like carbon coatings [Crossref]
  5. 2015 - Performance of carbide tools coated with DLC in the drilling of SAE 323 aluminum alloy [Crossref]
  6. 2015 - Tribological behavior of Al-6.5%, -12%, -18.5% Si alloys during machining using CVD diamond and DLC coated tools [Crossref]
  7. 2015 - Deposition of silicon-doped diamond-like carbon films by plasma-enhanced chemical vapor deposition using an intermittent supply of organosilane [Crossref]
  8. 2013 - Multi-layer haemocompatible diamond-like carbon coatings obtained by combined radio frequency plasma enhanced chemical vapor deposition and magnetron sputtering [Crossref]
  9. 2017 - Deposition of diamond-like carbon thin films by the high power impulse magnetron sputtering method [Crossref]

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