Study on Comparative Experiments of Performance of Conventional and Nanocrystalline Diamond Film

2006 ◽  
Vol 315-316 ◽  
pp. 847-851
Author(s):  
Ming Chen ◽  
Y.P. Ma ◽  
Dao Hui Xiang ◽  
Fang Hong Sun
Keyword(s):  
Diamond Film ◽  
Smooth Surface ◽  
Chemical Vapor ◽  
Nanocrystalline Diamond ◽  
Cemented Carbide ◽  
Deposition Parameters ◽  
Pin On Disc ◽  
Hot Filament ◽  
Work Done ◽  
Drawing Dies

Nanocrystalline diamond film with smooth surface and uniform grains was deposited successfully on Co-cemented carbide using the bias-enhanced hot filament chemical vapor deposition (HFCVD). The surface morphology and chemical quality of film were estimated by scanning electron microscopy (SEM), atomic force microscopy (AFM) and Raman spectroscopy. Comparative experiments of tribological and wear performances of conventional and nanocrystalline diamond films were carried out by pin-on-disc tester. The research results show that nanocrystalline diamond film with good tribological performance and high quality can be deposited by regulating the deposition parameters on Co-cemented carbide. The film not only has high adhesive strength but also has smooth surface, low surface roughness, low friction coefficient. The work done in this paper provide the wide application of diamond on complex shape tools, drawing dies and other wear resistant device with experimental reference.

Effect of Deposition Temperature on Surface Roughness of Nanocrystalline Diamond Film

2012 ◽  
Vol 476-478 ◽  
pp. 2353-2356
Author(s):  
Wen Qi Dai ◽  
Lin Jun Wang ◽  
Jian Huang ◽  
Yi Feng Liu ◽  
Ke Tang ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Chemical Vapor Deposition ◽  
Diamond Film ◽  
Vapor Deposition ◽  
Deposition Temperature ◽  
Chemical Vapor ◽  
Nanocrystalline Diamond ◽  
Different Temperatures ◽  
Hot Filament

Nanocrystalline diamond (NCD) films were synthesized by hot-filament chemical vapor deposition (HFCVD) method at different temperatures (600 °C, 620°C, 640°C and 660°C). The AFM and Raman analyses demonstrated that deposition temperature has a great effect on the surface roughness and quality of NCD films and 620°C is the temperature to grow NCD films with smooth surfaces.

MASS PRODUCTION OF HFCVD DIAMOND-COATED WIRE-DRAWING DIES WITHOUT FILAMENT THROUGH THE HOLE

2021 ◽  
pp. 2150006
Author(s):  
XIN SONG ◽  
CHENG-CHUAN WANG ◽  
XIN-CHANG WANG ◽  
FANG-HONG SUN
Keyword(s):  
Mass Production ◽  
Cfd Simulation ◽  
Chemical Vapor ◽  
Wire Drawing ◽  
Cemented Carbide ◽  
Small Aperture ◽  
Coated Wire ◽  
Volume Method ◽  
Hot Filament ◽  
Drawing Dies

Hot filament chemical vapor deposition (HFCVD) diamond-coated small aperture wire-drawing dies from [Formula: see text] to [Formula: see text][Formula: see text]mm are in high demand. A new deposition technique without filaments through the inner hole of wire-drawing dies is proposed, accompanied with the specially designed fixtures. Temperature distribution on the deposition surfaces is studied by computational fluid dynamics (CFD) simulation based on the finite volume method (FVM); both case study and mass production simulations are accomplished. Excellent performance and uniform multilayer MCD/NCD/MCD/NCD films are successfully deposited on the inner-hole surfaces of total 16 cemented carbide (WC-6wt.%Co) wire-drawing dies with an aperture of [Formula: see text][Formula: see text]mm in one batch. Drawing results of gas shield welding wires show that the lifespan of the multilayer diamond coated wire-drawing dies is about 20 times of the uncoated cemented carbide dies and 2 times of the monolayer MCD coated dies.

Mechanical Properties of Nanocrystalline Diamond Film Prepared by HFCVD

2011 ◽  
Vol 675-677 ◽  
pp. 751-754
Author(s):  
Feng Xu ◽  
Dun Wen Zuo ◽  
Wen Zhuang Lu ◽  
Min Mang
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Elastic Modulus ◽  
Substrate Temperature ◽  
Diamond Film ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
High Substrate Temperature ◽  
Nanocrystalline Diamond ◽  
Hot Filament

Nanocrystalline diamond film was deposited on silicon by double bias hot filament chemical vapor deposition (HFCVD) system. The effect of substrate temperature on the microstructure and mechanical properties of the film were investigated systematically. More defects and non-diamond contents were found as the decrease of grain size, which cause the decrease of hardness and elastic modulus. It is shown that the proper substrate temperature is in the range of 720~760 . The excessively high substrate temperature leads to the °C dramatic increase of nondiamond content and the decrease of mechanical properties.

Preparation of Nanocrystalline Diamond Films on Molybdenum Substrate by Double Bias Method

2006 ◽  
Vol 315-316 ◽  
pp. 646-650 ◽  
Author(s):  
Feng Xu ◽  
Dun Wen Zuo ◽  
Wen Zhuang Lu ◽  
Xiang Feng Li ◽  
Bing Kun Xiang ◽  
...  
Keyword(s):  
Bias Voltage ◽  
Diamond Film ◽  
Diamond Films ◽  
Chemical Vapor ◽  
Nanocrystalline Diamond ◽  
Nucleation Density ◽  
Nanocrystalline Diamond Films ◽  
Chemical Vapor Deposited ◽  
Hot Filament ◽  
Polycrystalline Molybdenum

The synthesis of nanocrystalline diamond film on polycrystalline molybdenum substrates was carried out by using of self-made hot filament chemical vapor deposited (HFCVD) system. Positive bias voltage on the grid electrode on top of hot filaments and negative bias voltage on the substrate were applied. High purity and extremely smooth nanocrystalline diamond films were successfully prepared by using the double bias method. Raman, SEM, XRD and AFM results show that the diamond films obtained have grain sizes less than 20nm, nucleation density higher than 1011cm-1. The mechanism of double bias is also discussed in this paper. The positive grid bias increases the active, decomposition and ionization of hydrogen and methane molecules, while negative substrate bias helps positive carbon-containing ions bombard the substrate that leads to the high nucleation density of the diamond film.

Nanocrystalline Diamond Film Deposited by Double Bias-Voltage Assited HF-PECVD System

2015 ◽  
Vol 1120-1121 ◽  
pp. 243-248
Author(s):  
Yong Zhang ◽  
En Lei Zhang ◽  
Zhao Long Lin
Keyword(s):  
Bias Voltage ◽  
Diamond Film ◽  
Vapor Deposition ◽  
Raman Band ◽  
Chemical Vapor ◽  
Nanocrystalline Diamond ◽  
Nucleation Density ◽  
New Process ◽  
Hot Filament

A new process has been developed to obtain high density nanocrystalline diamond (NCD) film via a double bias voltage hot filament-assisted plasma enhanced chemical vapor deposition (HF-PECVD). The microstructure and characterization of the film were analysed by SEM, Raman and AFM. The results show that the NCD film has higher nucleation density and smooth surface, the nanocrysatalline size was in diameter of about 40 nm. Three Raman band near 1150m-1, 1330 cm-1 and 1590m-1 lie in the specrum. The growth mechanism of naocrystalline diamond film was analysized at last.

Examination of the material properties and performance of thin-diamond film cutting tool inserts produced by arc-jet and hot filament chemical vapor deposition

1996 ◽  
Vol 11 (7) ◽  
pp. 1765-1775 ◽  
Author(s):  
James M. Olson ◽  
Michael J. Dawes
Keyword(s):  
Wear Resistance ◽  
Chemical Vapor Deposition ◽  
Diamond Film ◽  
Vapor Deposition ◽  
Cutting Tool ◽  
Diamond Films ◽  
Chemical Vapor ◽  
Polycrystalline Diamond ◽  
And Performance ◽  
Hot Filament

Thin diamond film coated WC-Co cutting tool inserts were produced using arc-jet and hot-filament chemical vapor deposition. The diamond films were characterized using SEM, XRD, and Raman spectroscopy to examine crystal structure, fracture mode, thickness, crystalline orientation, diamond quality, and residual stress. The performance of the tools was evaluated by comparing the wear resistance of the materials to brazed polycrystalline diamond-tipped cutting tool inserts (PCD) while machining A390 aluminum (18% silicon). Results from the experiments carried out in this study suggest that the wear resistance of the thin diamond films is primarily related to the grain boundary strength, crystal orientation, and the density of microdefects in the diamond film.

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