Effect of Grain Size of CVD Diamond Film on Cutting Performance of Diamond Coated Micro Drills

2012 ◽  
Vol 723 ◽  
pp. 407-411 ◽  
Author(s):  
Xue Lin Lei ◽  
Liang Wang ◽  
Bin Shen ◽  
Fang Hong Sun ◽  
Ming Chen
Keyword(s):  
Vapor Deposition ◽  
Flank Wear ◽  
Electrical Discharge Machining ◽  
Wear Behavior ◽  
Chemical Vapor ◽  
Cvd Diamond ◽  
Cutting Performance ◽  
Nano Crystalline ◽  
Cvd Diamond Film ◽  
Hot Filament

In this study, micro- crystalline diamond(MCD), fine grade diamond(FGD) and nano- crystalline diamond(NCD) thin films are successfully coated on WC-Co micro drills(φ=400µm) adopting hot filament chemical vapor deposition (HFCVD) technique. The microstructure and cutting performance of micro drills for applying to drill electrical discharge machining(EDM) graphite coated with MCD, FGD and NCD films are systematically investigated by means of field emission scanning electron microscope(FESEM) and Raman spectroscopy. After drilling of 1500 holes, wear behavior of these micro drills is analyzed by FESEM and NCD coated micro drills exhibit minimum flank wear compared with the other samples due to the relatively good wear resistance and friction properties of NCD films.

Effect of Nitrous Oxide Gas on Cvd Diamond Film Deposition

1990 ◽  
Vol 180 ◽  
Author(s):  
H. Koinuma ◽  
M. Yoshimoto ◽  
Y. Takagi ◽  
A. B. Sawaoka ◽  
T. HaHashimoto ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Vapor Deposition ◽  
Carbon Film ◽  
Chemical Vapor ◽  
Cvd Diamond ◽  
Film Deposition ◽  
Phase Reaction ◽  
Vapor Phase Reaction ◽  
Cvd Diamond Film ◽  
Hot Filament

ABSTRACTThe addition of nitrous oxide (N2O) gas in the hot-filament chemical vapor deposition of carbon film from mixtures of methane and hydrogen was found to increase remarkably the content of diamond structure in the film. Increased particle size and crystal orientation parallel to the (111) direction were also obtained by the N2O addition. Mass spectrometry revealed that the vapor phase reaction was scarcely affected by the N2O addition.

CVD Diamond Wires as X-Ray Detectors

1996 ◽  
Vol 423 ◽  
Author(s):  
C. Manfredotti ◽  
F. Fizzotti ◽  
M. Galetto ◽  
A. Lo Giudice ◽  
D. Margherita ◽  
...  
Keyword(s):  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Ionization Chamber ◽  
Chemical Vapor ◽  
Cvd Diamond ◽  
Diamond Wire ◽  
X Ray ◽  
Order Of Magnitude ◽  
Cvd Diamond Film ◽  
Hot Filament

AbstractMiniature metal-diamond wire detectors have been fabricated by Hot Filament Chemical Vapor Deposition (HFCVD) method and characterized as x-ray dosimeters in the energy range 50 keV–250 keV. Linearity of the response and the sensitivity as a function of energy have been accurately determined in a range routinely used for x-ray radiotherapy. With a Mo wire substrate, a 10 μm thick CVD diamond film can reach sensitivities of the order of 4×10−8 A/Gy/min, more than one order of magnitude larger than for a 6 cm3 standard ionization chamber.

Comparative Studies on the Cutting Performance of CVD Diamond and DLC Coated Inserts in Turning GFRP Composite Materials

2010 ◽  
Vol 431-432 ◽  
pp. 466-469
Author(s):  
Dong Can Zhang ◽  
Bin Shen ◽  
Fang Hong Sun ◽  
Ming Chen ◽  
Zhi Ming Zhang
Keyword(s):  
Composite Materials ◽  
Flank Wear ◽  
Arc Discharge ◽  
Cutting Tools ◽  
Chemical Vapor ◽  
Cvd Diamond ◽  
Cutting Performance ◽  
Vacuum Arc ◽  
Reinforced Plastics ◽  
Gfrp Composite

The diamond and diamond-like carbon (DLC) films were deposited on the cobalt cemented tungsten carbide (WC-Co) cutting tools respectively adopting the hot filament chemical vapor deposition (HFCVD) technique and the vacuum arc discharge with a graphite cathode. The scanning electron microscope (SEM), X-ray diffraction spectroscopy (XRD) and Raman spectroscopy were used to characterize the as-deposited diamond and DLC films. To evaluate their cutting performance, comparative turning tests were conducted using the uncoated WC-Co and as-fabricated CVD diamond and DLC coated inserts, with glass fiber reinforced plastics (GFRP) composite materials as the workpiece. The research results exhibited that diamond and DLC coated inserts had great advantages in cutting tests compared to uncoated insert. The flank wear of the CVD diamond coated insert maintained a very low value about 50μm before the cutting tool failure occurred. For the DLC coated insert, its flank wear always maintained a nearly constant value of 70~200μm during whole 45 minutes turning process. The flank wear of CVD diamond coated insert was lower than that of DLC coated insert before diamond films peeling off.

Mechanical properties and wear behavior of multi-layer diamond films deposited by hot-filament chemical vapor deposition

2019 ◽  
Vol 494 ◽  
pp. 401-411 ◽  
Author(s):  
Guangyu Yan ◽  
Yuhou Wu ◽  
Daniel Cristea ◽  
Lusheng Liu ◽  
Mircea Tierean ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Wear Behavior ◽  
Diamond Films ◽  
Chemical Vapor ◽  
Hot Filament

Improvement on the Cutting Performance of CVD Diamond Coated Drills in Drilling CFRP

2012 ◽  
Vol 499 ◽  
pp. 366-371 ◽  
Author(s):  
Jian Guo Zhang ◽  
Ben Wang ◽  
Fang Hong Sun ◽  
Hang Gao
Keyword(s):  
Thermal Conductivity ◽  
Wear Resistance ◽  
Diamond Films ◽  
Chemical Vapor ◽  
Cvd Diamond ◽  
Cutting Performance ◽  
Reinforced Plastics ◽  
Coated Tool ◽  
Hot Filament

Carbon fiber reinforced plastics (CFRP) is difficult to machine because of the extremely abrasive nature of the carbon fibers and its low thermal conductivity. CVD diamond films have many excellent properties such as wonderful wear resistance, high thermal conductivity and low friction coefficient, therefore depositing diamond films on the surface of drills is thought to be an effective way to elongate the lifetime of drills and improve the cutting performance. In this study, diamond films are deposited on the WC-Co drill using hot filament chemical vapor deposition (HFCVD) method. The results of characterization by the scanning electron microscope (SEM) and Raman spectrum indicate that the fabricated CVD diamond coated drill is covered with a layer of uniform and high-purity diamond films. The cutting performance of as-fabricated CVD diamond coated drill is evaluated in dry drilling CFRP, comparing with the uncoated WC-Co drill. The results demonstrate that the CVD diamond coated drill exhibits much stronger wear resistance. Its flank wear is about 50μm after drilling 30 holes, about one-third of that of WC-Co drill. Machining quality of the exit and internal wall of drilled holes shows better surface finish obtained by coated drill, which suggests that CVD diamond coated tool has great advantages in drilling CFRP.

Comparative Studies on the Cutting Performance of HFCVD Diamond and DLC Coated WC-Co Milling Tools in Dry Machining Al/SiC-MMC

2010 ◽  
Vol 126-128 ◽  
pp. 220-225 ◽  
Author(s):  
Bin Shen ◽  
Fang Hong Sun ◽  
Dong Can Zhang
Keyword(s):  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Arc Discharge ◽  
Chemical Vapor ◽  
Cvd Diamond ◽  
Cutting Edge ◽  
Cutting Performance ◽  
Vacuum Arc ◽  
Milling Tool ◽  
Milling Tools

The chemical vapor deposition (CVD) diamond and diamond-like carbon (DLC) films are deposited on the cobalt cemented tungsten carbide (WC-Co) cutting tools respectively using the hot filament chemical vapor deposition (HFCVD) technique and the vacuum arc discharge with a graphite cathode. The scanning electron microscope (SEM), optical interferometer profiler and Raman spectroscopy were adopted to characterize the as-deposited diamond and DLC films. The cutting performance of as-fabricated CVD diamond and DLC coated milling tools is evaluated in dry milling SiC particulate reinforced Al-metal matrix composite material (Al/SiC-MMCs), comparing with the uncoated WC-Co milling tool. The milling results demonstrate that the uncoated WC-Co milling tool suffers severest wear in its circumferential cutting edge, while the wear of DLC coated milling tool is slightly lower. Comparatively, the CVD diamond coated milling tool exhibits much stronger wear resistance. The wear on its circumferential cutting edge is less than 0.07 mm at the end of milling test, only a half of that of DLC coated milling tool. This result is attributed to the extremely high hardness and strong adhesive strength of CVD diamond film covered on the WC-Co milling tool.

Effect of Oxygen on CVD Diamond Film Deposition

2012 ◽  
Vol 482-484 ◽  
pp. 891-894
Author(s):  
Yuan Sheng Huang ◽  
Cheng Ping Luo ◽  
Wan Qi Qiu
Keyword(s):  
Oxygen Content ◽  
Vapor Deposition ◽  
Diamond Films ◽  
Chemical Vapor ◽  
Cvd Diamond ◽  
Film Deposition ◽  
Chemical Vapor Deposition Method ◽  
Deposition Method ◽  
Cvd Diamond Film ◽  
Effect Of Oxygen

CVD diamond films were synthesized by the chemical vapor deposition method. With increasing the oxygen content in the deposition atmosphere, the density of diamond nuclei decreases. No diamond is formed when the oxygen content is more than one percent. The density of diamond nuclei is improved with increasing the methane content. Adding oxygen to the deposition atmosphere can enhance the purity of diamond.

Selective Growth of B-Doped Diamond on Si-Doped Diamond Film

2012 ◽  
Vol 217-219 ◽  
pp. 1013-1017
Author(s):  
Y.X. Cui ◽  
B. Shen ◽  
F.H. Sun ◽  
Z.M. Zhang
Keyword(s):  
Diamond Film ◽  
Sacrificial Layer ◽  
Diamond Films ◽  
Chemical Vapor ◽  
Cvd Diamond ◽  
Selective Area ◽  
Si Doped ◽  
Cvd Diamond Film ◽  
Hot Filament ◽  
Area Deposition

Si doped CVD diamond films are prepared on Si substrate by means of hot filament chemical vapor deposition (HFCVD) through adding tetraethoxysilane (TEOS) into acetone as source of reactant gas during the growth process. The samples of diamond films are investigated by scanning electron micrograph (SEM), Raman spectrum, X-ray diffractometry (XRD) and surface profiler. The experimental results show that compared with pure diamond film, Si doped CVD diamond film exhibits grain refinement and smoother surface. Then selective area deposition (SAD) of B-doped diamond films are achieved on both Si doped CVD diamond film and pure CVD diamond film with silicon dioxide layer as sacrificial layer. SEM investigation demonstrates that the boundary of patterning on pure diamond film is rather fuzzy while on pure diamond film it is trim and distinct, which is mainly attributed to the relatively low surface roughness.

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