Microcrystalline and Nanocrystalline Diamond Film Deposition on Cobalt Chrome Alloy

1999 ◽  
Vol 594 ◽  
Author(s):  
Marc D. Fries ◽  
Yogesh K. Vohra
Keyword(s):  
Diamond Film ◽  
Microwave Plasma ◽  
Diamond Films ◽  
Chemical Vapor ◽  
Film Deposition ◽  
Nanocrystalline Diamond ◽  
Plasma Chemical Vapor Deposition ◽  
High Thermal Expansion ◽  
Cobalt Chrome Alloy ◽  
Cobalt Chrome

AbstractThe cobalt chrome alloy Co-28Cr-6Mo is widely used in human joint replacement applications. These joints are highly sensitive to wear and are usually replaced after approximately ten years of use. In order to extend these implants' service lifetimes, a thin film of diamond may be applied to the implant wear surfaces by microwave plasma chemical vapor deposition (MPCVD) following MPCVD nitridation. Diamond films often delaminate from cobalt chrome due to a high thermal expansion mismatch. Additionally, under most conditions diamond films degrade into graphite by dissolution of nuclei into solvents like Co and Cr. By nitriding the cobalt chrome through MPCVD prior to diamond deposition, a usable diamond film may be achieved. It may be possible to merge both the nitriding and deposition steps into a single process, since both nitridation and deposition will be performed by MPCVD. In addition, controlled amounts of nitrogen in hydrogen/methane plasma under CVD conditions result in a nanostructured diamond coating. We have investigated the formation of both micro- and nanocrystalline diamond formation on cobalt chrome.

Nano-Crystalline Diamond Films Deposited on Copper Substrate by MPCVD Method

2011 ◽  
Vol 117-119 ◽  
pp. 1310-1314
Author(s):  
Xing Rui Li ◽  
Xin Wei Shi ◽  
Ning Yao ◽  
Xin Chang Wang
Keyword(s):  
Diamond Film ◽  
Deposition Time ◽  
Microwave Plasma ◽  
Copper Substrate ◽  
Diamond Films ◽  
Chemical Vapor ◽  
Annealing Process ◽  
Adhesive Properties ◽  
Plasma Chemical Vapor Deposition ◽  
Nano Crystalline

Nano-crystalline diamond (NCD) films with good adhesion were deposited on flexible copper substrate with Ni interlayer by Microwave Plasma Chemical Vapor Deposition (MPCVD). In this paper, two-stage method was used to improve the adhesion between the copper substrates and the diamond films. The effect of deposition time of the first stage on the morphology, crystal structure, non-diamond phase and adhesive properties of diamond films was investigated. The performance and structure of the diamond films were studied by Scanning Electron Microscope (SEM), Raman Spectroscopy (Raman) and X-Ray Diffraction (XRD). The results showed that the films were nano-crystalline diamond films positively. Impress method was used to examine the adhesion between diamond film and the substrate. When deposition time is 1.5h, the adhesion between diamond film and the copper substrate is better than the others. When it was 2.5h or longer, because the graphite layers existed as intermediate, the adherence between the diamond films and copper substrates was very poor. Therefore, the diamond films were easily peeled off from the substrates. Otherwise, the second stage called annealing process after the deposition played an important role to the adhesion. The films would be easily peeled off by curling without the annealing process.

Thermal Stability of Nanocrystalline Diamond Films Grown by Microwave Plasma Chemical Vapor Deposition

2002 ◽  
Vol 750 ◽  
Author(s):  
Mevlut Bulut ◽  
Shane A. Catledge ◽  
Yogesh K. Vohra ◽  
Renato P. Camata
Keyword(s):  
Thermal Stability ◽  
Vapor Deposition ◽  
Microwave Plasma ◽  
Diamond Films ◽  
Chemical Vapor ◽  
Nanocrystalline Diamond ◽  
Plasma Chemical ◽  
Plasma Chemical Vapor Deposition ◽  
Nanocrystalline Diamond Films ◽  
Thermal Stability Of

ABSTRACTIn this work, the open-air thermal stability of nanocrystalline diamond films grown on mirror-polished titanium alloy substrates by the Microwave Plasma Chemical Vapor Deposition (MPCVD) technique was studied. The results of this investigation show that nanocrystalline diamond films are highly stable in air up to 600°C with no significant change in mechanical properties. Samples annealed between 600°C and 650°C, however, exhibit values of hardness lower by as much as 40% compared to as-grown samples. Above 650°C serious delamination effects were observed in the coatings.

Nanocrystalline Diamond Film Produced by Argon Addition in the CH4-H2 Microwave CVD Plasmas

2007 ◽  
Vol 26-28 ◽  
pp. 615-618
Author(s):  
Syed Jawid Askari ◽  
Fan Xiu Lu
Keyword(s):  
Diamond Film ◽  
Microwave Plasma ◽  
Pure Titanium ◽  
Chemical Vapor ◽  
Nanocrystalline Diamond ◽  
Complex Nature ◽  
Nucleation Density ◽  
Diamond Coatings ◽  
Plasma Chemical Vapor Deposition ◽  
Thermal Expansion Coefficients

Diamond coatings on pure titanium substrates are of interest for tribological and biomedical implants. However, due to the different thermal expansion coefficients of the two materials, the complex nature of the interlayer formed during diamond deposition, and the difficulty in achieving very high nucleation density, it is hard to deposit adherent thin diamond layers on titanium. The aim of the present research was to successfully produce smooth and well adherent nanocrystalline diamond (NCD) film on a pure Ti substrate using the microwave plasma chemical vapor deposition (MWPCVD) method. The influence of Argon addition to CH4/H2 plasma on the crystallinity, morphology and growth of the diamond film deposited by MWPCVD was investigated using field emission scanning electron microscopy (FE-SEM), atomic force microscopy (AFM), Xray diffraction (XRD) and Raman spectroscopy.

Influence of the Gas Phase Composition on Nanocrystalline Diamond Films Prepared by MWCVD

2005 ◽  
Vol 23 ◽  
pp. 31-34 ◽  
Author(s):  
Cyril Popov ◽  
Miroslav Jelínek ◽  
S. Boycheva ◽  
V. Vorlícek ◽  
Wilhelm Kulisch
Keyword(s):  
Phase Composition ◽  
Gas Phase ◽  
Vapor Deposition ◽  
Microwave Plasma ◽  
Diamond Films ◽  
Chemical Vapor ◽  
Nanocrystalline Diamond ◽  
Plasma Chemical ◽  
Plasma Chemical Vapor Deposition ◽  
Bonding Structure

Nanocrystalline diamond (NCD) films have been prepared by microwave plasma chemical vapor deposition (MWCVD) from methane/nitrogen mixtures, and the influence of the gas phase composition on the basic properties of the films (composition, morphology, topography, crystallinity and bonding structure) was investigated.

LATERAL OVERGROWTH OF DIAMOND FILMS ON METAL MASKED SUBSTRATE BY MICROWAVE PLASMA CHEMICAL VAPOR DEPOSITION

2002 ◽  
Vol 16 (06n07) ◽  
pp. 841-844 ◽  
Author(s):  
H. YAMAMOTO ◽  
Y. NAOI ◽  
Y. FUJII ◽  
Y. SHINTANI
Keyword(s):  
Chemical Vapor Deposition ◽  
Diamond Film ◽  
Vapor Deposition ◽  
Microwave Plasma ◽  
Diamond Films ◽  
Chemical Vapor ◽  
Crystal Nucleation ◽  
Plasma Chemical ◽  
Plasma Chemical Vapor Deposition ◽  
Mask Material

We have grown laterally overgrown diamond films on stripe patterned silicon substrates by microwave plasma chemical vapor deposition. Titanium was used as the mask material and stripe patterns were fabricated using conventional photolithographic method. The selective growth area and the metal mask part order to enhance the crystal nucleation was performed before photolithographic process. SEM observation revealed that the diamond film was laterally overgrown on titanium mask. The result width of diamond film was 16 μm. The grain size on mask region was about three times as large as that g rown on nucleation region.

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