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.

Influence of Substrate Nitriding on Adhesion, Friction and Wear Resistance of DLC (Diamond-Like Carbon)-Coatings

2010 ◽  
Vol 438 ◽  
pp. 211-218 ◽  
Author(s):  
Wolfgang Tillmann ◽  
Evelina Vogli ◽  
Fabian Hoffmann ◽  
Patrick Kemdem
Keyword(s):  
Wear Resistance ◽  
Physical Vapor Deposition ◽  
Friction And Wear ◽  
Steel Substrate ◽  
Substrate Material ◽  
Diamond Like Carbon ◽  
Wide Field ◽  
Dlc Coatings ◽  
Dlc Coating ◽  
Adhesion Friction

Since diamond like carbon layers feature excellent mechanical and tribological behavior under defined environmental circumstances, they are well established in a wide field of industrial and automotive applications in the last decade. However, the pretreatment of the substrate plays also an important role in supporting and enforcing the excellent properties of the coatings. This work analyses the effect of the plasma nitrided cold working steel substrate (80CrV2) on the adhesion, friction and wear resistance of DLC-coatings and compares it to the performance of DLC-coatings applied on a non-hardened substrate material. Therefore the grinded and polished specimens were nitrogen-hardened in an Arc-PVD (Physical Vapor Deposition)-device before the DLC-coating was applied in a Magnetron Sputter-PVD-process. In order to measure the hardness of the thin film coating, a nanoindenter was used. The adhesion was tested with a scratch tester and the wear resistance was measured by using a Ball-on-disc-tester. A 3D-profilometer and a SEM (Scanning Electron Microscope) were utilized to analyze the scratches and wear tracks on the samples. With these results correlations between the substrate nitriding and the mechanical and tribological performance of the DLC-coating were made.

scholarly journals DLC Coatings on Spherical Elements of HIP Endoprostheses

2018 ◽  
Vol 2 (3) ◽  
pp. 41-47
Author(s):  
V. V. Vasylyev ◽  
V. E. Strel’nitskij ◽  
V. B. Makarov ◽  
M. A. Skoryk ◽  
G. O. Lazarenko
Keyword(s):  
Hip Joint ◽  
High Hardness ◽  
Plasma Source ◽  
Hard Coatings ◽  
Vacuum Arc ◽  
Diamond Like Carbon ◽  
Dlc Coatings ◽  
Dlc Coating ◽  
High Adhesion ◽  
High Level

Abstract Hard coatings are increasingly being used in medicine to protect metal endoprostheses The experimental process for the high-productive synthesis of high-quality diamond-like carbon (DLC) coatings with high hardness and a sufficiently high level of adhesion to the spherical shaped parts of the hip joint made from the stainless steel or cobalt-chrome alloy have been developed. DLC coating deposition was performed by vacuum-arc method from a high-productive source of the filtered vacuum-arc carbon plasma of rectilinear type with a "magnetic island". The high degree of thickness uniformity in the coating on the head of the hip joint with a high adhesion to the metal joint base was developed. Modernization of the vacuum arc plasma source allowed to accelerate the cathode spot motion, exclude substrate overheating and increase the diamond-like carbon hardness up to 30-40 GPa. The high adhesion level was achieved as a result of the high voltage pulsed of substrate bias potential use and multilayer architecture of DLC coating. The DLC coating on the heads of hip endoprosthesis did not peel off when boiling endoprosthesis or when immersing it into the liquid nitrogen.

THE EFFECT OF RESIDUAL STRESS ON THE WEAR PROPERTIES OF DLC COATINGS

2010 ◽  
Vol 24 (15n16) ◽  
pp. 2977-2982
Author(s):  
YOUNG-JUN JANG ◽  
SEOCK-SAM KIM ◽  
JONG-JOO RHA
Keyword(s):  
Residual Stress ◽  
Wear Resistance ◽  
Compressive Residual Stress ◽  
Diamond Like Carbon ◽  
Wear Properties ◽  
Dlc Coatings ◽  
Dlc Coating ◽  
Film Hardness ◽  
Increase Wear Resistance ◽  
Layer Coating

Multi-layer diamond-like carbon (DLC) coating, 150 and 220 nm thick were deposited by negative pulsed d.c. bias induced with magnetron sputtering. The objective of this research is to resolve a wear resistance in terms of DLC coating residual stress and mechanical properties. The bias was controlled from - 200 to 0 V during 10 second with point contacting controller. The surface structure was continuously fabricating to soft and hard-layer during deposition. It was shown that the compressive residual stress and hardness were 0.09, 18 GPa under multi-layer coating condition. The as-deposited DLC coating has a relatively higher wear resistance than unmodified DLC under nanoabrasive wear. It also showed that multi-layer DLC coating had no wear until 400 nN. The decreased residual stress and increased film hardness in the multi-layer coating gave a rise to increase wear resistance.

scholarly journals DLC Coatings on Spherical Elements of HIP Endoprostheses

2018 ◽  
Vol 2 (3) ◽  
pp. 42
Author(s):  
V.V. Vasylyev ◽  
Strel'nitskij V.E. ◽  
V. B. Makarov
Keyword(s):  
Hip Joint ◽  
High Hardness ◽  
Plasma Source ◽  
Hard Coatings ◽  
Vacuum Arc ◽  
Diamond Like Carbon ◽  
Dlc Coatings ◽  
Dlc Coating ◽  
High Adhesion ◽  
High Level

Hard coatings are increasingly being used in medicine to protect metal endoprostheses The experimental process for the high-productive synthesis of high-quality diamond-like carbon (DLC) coatings with high hardness and a sufficiently high level of adhesion to the spherical shaped parts of the hip joint made from the stainless steel or cobalt-chrome alloy have been developed. DLC coating deposition was performed by vacuum-arc method from a high-productive source of the filtered vacuum-arc carbon plasma of rectilinear type with a "magnetic island". The high degree of thickness uniformity in the coating on the head of the hip joint with a high adhesion to the metal joint base was developed. Modernization of the vacuum arc plasma source allowed to accelerate the cathode spot motion, exclude substrate overheating and increase the diamond-like carbon hardness up to 30-40 GPa. The high adhesion level was achieved as a result of the high voltage pulsed of substrate bias potential use and multilayer architecture of DLC coating. The DLC coating on the heads of hip endoprosthesis did not peel off when boiling endoprosthesis or when immersing it into the liquid nitrogen. JEL O31

Sliding Wear of Non-Hydrogenated Diamond-Like Carbon Coatings Against Al, Cu and Ti

2005 ◽  
Author(s):  
E. Konca ◽  
Y. T. Cheng ◽  
A. T. Alpas
Keyword(s):  
Sliding Wear ◽  
Ambient Air ◽  
Inert Atmosphere ◽  
Diamond Like Carbon ◽  
Severe Damage ◽  
Material Transfer ◽  
Carbon Coatings ◽  
Dlc Coatings ◽  
Dlc Coating ◽  
Pin On Disc

Magnetron sputtered non-hydrogenated diamond-like carbon (DLC) coatings were tested against Al, Cu and Ti pins using a vacuum pin-on-disc tribometer. The objective was to compare Al, Ti, and Cu transfer to DLC coatings in air (29% RH) and an inert atmosphere (argon). In argon, a significant amount of adhesion and material transfer occurred from the Al and Ti pins to the DLC coating surfaces inflicting severe damage to the coatings. Wear and material transfer of the DLC coating against Cu were negligible in argon. Compared to tests in argon, the tribological performance of the DLC coatings against Al and Ti improved significantly in ambient air. In contrast, the wear rate of the DLC coatings against Cu was much higher in ambient air compared to that in argon.

scholarly journals Stability of Diluted Chlorhexidine Gluconate and Benzalkonium Chloride with High-pressure Steam Sterilization.

1996 ◽  
Vol 22 (6) ◽  
pp. 643-649
Author(s):  
YOSHIHISA WATANABE ◽  
YOSHIHARU ARAI ◽  
MASANORI IWATA ◽  
EIJI USAMI ◽  
TADANORI SASAKI ◽  
...  
Keyword(s):  
High Pressure ◽  
Benzalkonium Chloride ◽  
Chlorhexidine Gluconate ◽  
Steam Sterilization ◽  
High Pressure Steam ◽  
Pressure Steam

Metal-Containing Diamond-Like Carbon Coating as a Smart Sensor

2010 ◽  
Vol 638-642 ◽  
pp. 2103-2108 ◽  
Author(s):  
Toshiyuki Takagi ◽  
Takanori Takeno ◽  
Hiroyuki Miki
Keyword(s):  
Metal Clusters ◽  
Protective Coatings ◽  
Strain Sensor ◽  
Diamond Like Carbon ◽  
Deposition Condition ◽  
Smart Sensor ◽  
Dlc Coatings ◽  
Dlc Coating ◽  
New Type ◽  
Smart Coating

A new type of smart sensor based on metal-containing diamond-like carbon (DLC) coatings is presented. DLC coatings are widely used as protective coatings to improve the surface properties of objective materials; for example, to increase hardness and chemical stability. With the addition of metal clusters into DLC coatings, electrical conduction appears to depend on the microstructure. Such coatings can be used in fabricating resistive sensors. In this paper, we present tungsten-containing DLC (W-DLC) as a possible strain sensor. The strain sensitivity is greatly affected by the deposition condition. We also fabricate a double-layered DLC/W-DLC coating. The double-layered structure is expected to be used as a smart coating having functionality as a sensor with a protective DLC overcoat.

Effects of Interlayer on Mechanical Properties of Diamond-Like Carbon Coatings

2018 ◽  
Vol 883 ◽  
pp. 43-47 ◽  
Author(s):  
Sun Hui Yao ◽  
Yan Liang Su ◽  
Yu Chen Lai ◽  
Huang Ming Wu
Keyword(s):  
Mechanical Properties ◽  
Diamond Like Carbon ◽  
Carbon Coatings ◽  
Dlc Coatings ◽  
Mechanical And Tribological Properties ◽  
Dlc Coating ◽  
Unbalanced Magnetron Sputtering ◽  
Unbalanced Magnetron ◽  
The One ◽  
Sputtering System

This paper reports comparative studies on effects of interlayer on mechanical properties of diamond-like carbon (DLC) coatings. Two interlayers, TiC/Ti and CrC/Cr, were deposited and studied. The DLC coatings were prepared by using an unbalanced magnetron sputtering system. The chemical composition, micro-structure, constituted phases, and fundamental mechanical and tribological properties were evaluated. The results showed that the two amorphous (a-) DLC coatings were obtained. The a-DLC coating with the TiC/Ti interlayer showed higher adhesion, hardness and wear resistance than the one with the CrC/Cr interlayer.

Morphology of Fibroblastic Cells Cultured on Diamond-Like Carbon Coatings Produced by Plasma Immersion Using AFM and SEM

2006 ◽  
Vol 309-311 ◽  
pp. 713-716 ◽  
Author(s):  
E.T. Uzumaki ◽  
C.S. Lambert ◽  
L.O. Bonugli ◽  
A.R. Santos ◽  
Cecília A.C. Zavaglia
Keyword(s):  
Biological Effects ◽  
Diamond Like Carbon ◽  
Electron Microscopic ◽  
Adhesion Properties ◽  
Carbon Coatings ◽  
Dlc Coatings ◽  
Dlc Coating ◽  
Atomic Force ◽  
Fibroblastic Cells ◽  
Potential Use

For the potential use of diamond-like carbon (DLC) coating for biomedical applications, it would be important to evaluate the biological effects of these coatings. In this study, DLC coatings were deposited on glass coverslips using the plasma immersion process, which produces films with adhesion properties superior to those prepared with conventional techniques. Scanning electron microscopic and atomic force microscopic observations were used to study the morphology of fibroblasts growth on DLC coatings.

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