Relationships between Raman parameters obtained from cyclic indentation impressions on DLC coatings

2020 ◽  
Vol 52 (12) ◽  
pp. 859-863
Author(s):  
Yuka Takagawa ◽  
Morimasa Nakamura ◽  
Ken‐ichi Miura ◽  
Junpei Kobata
Keyword(s):  
Dlc Coatings ◽  
Cyclic Indentation

Properties and Performance of Hard Coatings on Tool Steels under Cyclic Indentation

2009 ◽  
Vol 13 (3) ◽  
pp. 84-95 ◽  
Author(s):  
Alina Sivitski ◽  
Andre Gregor ◽  
Mart Saarna ◽  
Priit Kulu ◽  
Fjodor Sergejev
Keyword(s):  
Hard Coatings ◽  
Tool Steels ◽  
Cyclic Indentation ◽  
And Performance

scholarly journals Surface Reformation of Medical Devices with DLC Coating

Materials ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 376
Author(s):  
Mao Kaneko ◽  
Masanori Hiratsuka ◽  
Ali Alanazi ◽  
Hideki Nakamori ◽  
Kazushige Namiki ◽  
...  
Keyword(s):  
High Pressure ◽  
Medical Devices ◽  
Diamond Like Carbon ◽  
Steam Sterilization ◽  
Dlc Coatings ◽  
Chrome Plating ◽  
Living Body ◽  
Dlc Coating ◽  
Pressure Steam ◽  
Adhesion Friction

We evaluated the adhesion, friction characteristics, durability against bodily acids, sterilization, cleaning, and anti-reflection performance of diamond-like carbon (DLC) coatings formed as a surface treatment of intracorporeal medical devices. The major coefficients of friction during intubation in a living body in all environments were lower with DLC coatings than with black chrome plating. DLC demonstrated an adhesion of approximately 24 N, which is eight times stronger than that of black chrome plating. DLC-coated samples also showed significant stability without being damaged during acid immersion and high-pressure steam sterilization, as suggested by the results of durability tests. In addition, the coatings remained unpeeled in a usage environment, and there was no change in the anti-reflection performance of the DLC coatings. In summary, DLC coatings are useful for improving intracorporeal device surfaces and extending the lives of medical devices.

scholarly journals Amorphous Carbon Coatings for Total Knee Replacements—Part I: Deposition, Cytocompatibility, Chemical and Mechanical Properties

Polymers ◽  
2021 ◽  
Vol 13 (12) ◽  
pp. 1952
Author(s):  
Benedict Rothammer ◽  
Kevin Neusser ◽  
Max Marian ◽  
Marcel Bartz ◽  
Sebastian Krauß ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Amorphous Carbon ◽  
Detailed Characterization ◽  
Carbon Coatings ◽  
Dlc Coatings ◽  
Total Knee Replacements ◽  
Knee Replacements ◽  
Total Knee ◽  
Amorphous Carbon Coatings

Diamond-like carbon (DLC) coatings have the potential to reduce implant wear and thus to contribute to avoiding premature failure and increase service life of total knee replacements (TKAs). This two-part study addresses the development of such coatings for ultrahigh molecular weight polyethylene (UHMWPE) tibial inlays as well as cobalt–chromium–molybdenum (CoCr) and titanium (Ti64) alloy femoral components. While a detailed characterization of the tribological behavior is the subject of part II, part I focusses on the deposition of pure (a‑C:H) and tungsten-doped hydrogen-containing amorphous carbon coatings (a‑C:H:W) and the detailed characterization of their chemical, cytological, mechanical and adhesion behavior. The coatings are fabricated by physical vapor deposition (PVD) and display typical DLC morphology and composition, as verified by focused ion beam scanning electron microscopy and Raman spectroscopy. Their roughness is higher than that of the plain substrates. Initial screening with contact angle and surface tension as well as in vitro testing by indirect and direct application indicate favorable cytocompatibility. The DLC coatings feature excellent mechanical properties with a substantial enhancement of indentation hardness and elastic modulus ratios. The adhesion of the coatings as determined in modified scratch tests can be considered as sufficient for the use in TKAs.

scholarly journals Wear-corrosion performance of Si-DLC coatings on Ti-6Al-4V substrate

2008 ◽  
Vol 86A (1) ◽  
pp. 41-47 ◽  
Author(s):  
Jung-Gu Kim ◽  
Kwang-Ryeol Lee ◽  
Seok-Jo Yang
Keyword(s):  
Corrosion Performance ◽  
Dlc Coatings

On the analysis of surface free energy of DLC coatings deposited in low pressure RF discharge

2004 ◽  
Vol 54 (S3) ◽  
pp. C877-C882 ◽  
Author(s):  
Z. Navrátil ◽  
V. Buršíková ◽  
P. St’ahel ◽  
M. Šíra ◽  
P. Zvěřina
Keyword(s):  
Free Energy ◽  
Surface Free Energy ◽  
Low Pressure ◽  
Rf Discharge ◽  
Dlc Coatings

Characterization of thick and soft DLC coatings deposited on plasma nitrided austenitic stainless steel

2015 ◽  
Vol 59 ◽  
pp. 73-79 ◽  
Author(s):  
Eugenia L. Dalibón ◽  
Daniel Heim ◽  
Christian Forsich ◽  
Andreas Rosenkranz ◽  
M. Agustina Guitar ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Dlc Coatings

Effect of deposition pressure on the properties of DLC coatings deposited by bipolar-type PBII&D

2008 ◽  
Vol 40 (3-4) ◽  
pp. 806-809 ◽  
Author(s):  
Junho Choi ◽  
Setsuo Nakao ◽  
Masami Ikeyama ◽  
Takahisa Kato
Keyword(s):  
Deposition Pressure ◽  
Dlc Coatings ◽  
Bipolar Type

Tribological behavior of thick DLC coatings under lubricated conditions

2017 ◽  
Vol 314 ◽  
pp. 13-17 ◽  
Author(s):  
Bernd Rübig ◽  
Daniel Heim ◽  
Christian Forsich ◽  
Christian Dipolt ◽  
Thomas Mueller ◽  
...  
Keyword(s):  
Tribological Behavior ◽  
Dlc Coatings

Atomic Force Microscopic Observations of Diamond-like Carbon (DLC) Films Produced by Plasma Immersion and Fibroblasts Cultured on DLC

2005 ◽  
Vol 11 (S03) ◽  
pp. 82-85 ◽  
Author(s):  
E. T. Uzumaki ◽  
C. S. Lambert ◽  
A. R. Santos Jr. ◽  
C. A. C. Zavaglia
Keyword(s):  
Corrosion Resistance ◽  
Electrochemical Impedance ◽  
Corrosion Behaviour ◽  
Three Dimensional ◽  
Chemical Vapour ◽  
High Wear Resistance ◽  
Diamond Like Carbon ◽  
Good Adhesion ◽  
Dlc Coatings ◽  
High Adhesion

Diamond-like carbon (DLC) films have been intensively studied with a view to improving orthopaedic implants. Studies have indicated smoothness of the surface, low friction, high wear resistance, corrosion resistance and biocompatibility [1-4]. DLC coatings can be deposited using various techniques, such as plasma assisted chemical vapour deposition (PACVD), magnetron sputtering, laser ablation, and others [5]. However it has proved difficult to obtain films which exhibit good adhesion. The plasma immersion process, unlike the conventional techniques, allows the deposition of DLC on three-dimensional workpieces, even without moving the sample, without an intermediate layer, and with high adhesion [6], an important aspect for orthopaedic articulations. In our previous work, DLC coatings were deposited on silicon and Ti-13Nb-13Zr alloy substrates using the plasma immersion process for the characterization of microstructure, mechanical properties and corrosion behaviour [7-9]. Hardness, measured by a nanoindenter, ranged from 16.4-17.6 GPa, the pull test results indicate the good adhesion of DLC coatings to Ti-13Nb-13Zr, and electrochemical assays (polarization test and electrochemical impedance spectroscopy) indicate that DLC coatings produced by plasma immersion can improve the corrosion resistance [9].

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