Cobalt out-diffusion and carbon phase composition at the WC-10%Co/diamond film interface investigated by XPS, SEM, Raman and SIMS

2012 ◽  
Vol 209 (9) ◽  
pp. 1726-1731 ◽  
Author(s):  
Elad Hojman ◽  
Roza Akhvlediani ◽  
Eli Alagem ◽  
Alon Hoffman
Keyword(s):  
Phase Composition ◽  
Diamond Film ◽  
Carbon Phase ◽  
Film Interface

scholarly journals Features of the diamond films growth on the tungsten carbide surface by a copper underlayer

2019 ◽  
pp. 72-81
Author(s):  
D. S. Vokhmyanin ◽  
S. A. Oglezneva
Keyword(s):  
Surface Layer ◽  
Phase Composition ◽  
Hard Alloy ◽  
Diamond Film ◽  
Diamond Films ◽  
Surface Preparation ◽  
Growth Stages ◽  
Compressive Stresses ◽  
Diamond Crystals ◽  
Cuso4 Solution

Surface preparation is a prerequisite for ensuring the required properties of a diamond film obtained by gas-phase deposition. The paper considers the effect of temperature and concentration of the etchant CuSO4 on the structural and phase composition of the surface of hard-alloy materials. The structural and phase composition of a continuous polycrystalline diamond film at its growth stages was also studied. Adhesion of the obtained diamond films to the surface of carbide materials was qualitatively determined. It has been established that surface treatment of a hard alloy in a CuSO4 solution at a temperature t = 23 °C leads to unequal removal of the cobalt bond with chipping of WC grains and the formation of a porous structure in the surface layer of the WC–6%Co alloy. The treatment with an etchant CuSO4 at t = –2 °С ensures uniform etching of the Co-bond along the WC grain boundaries and the formation of a chemically uniform surface. The orientational growth and adhesion of the diamond film depend on the elemental composition of the surface of the WC–Co alloy after treatment with a CuSO4 solution. If the treatment was carried out at a tsolution = 23 °C, then during the synthesis of the diamond film, the removal of copper from the defective surface layer of WC is difficult. This provides the multidirectional growth of diamond crystals in the film in two directions: <111> and <110>, which causes critical biaxial compressive stresses (2,5 GPa) and leads to low adhesion of the film to the surface of the hard alloy. If the treatment was carried out at tsolution = –2 °C, then the orientational growth of diamond crystals in the film occurs in one preferential crystallographic direction <111>. It reduces the biaxial compressive stresses (1,7 GPa) and increases the adhesive adhesion of the film to the surface of the hard alloy . The structure defect, calculated from the ratio of the lines of integrated intensities I1333 / I1580 using the Raman spectroscopy, decreases with concentration growth for negative temperatures and increases for positive ones of CuSO4 solution during surface preparation.

Carbon Nanotube Array Thermal Interfaces on Chemical Vapor Deposited Diamond

2007 ◽  
Author(s):  
Baratunde A. Cola ◽  
Xianfan Xu ◽  
Timothy S. Fisher
Keyword(s):  
Carbon Nanotube ◽  
Diamond Film ◽  
Diamond Films ◽  
Chemical Vapor ◽  
Photoacoustic Technique ◽  
Nanotube Array ◽  
Carbon Nanotube Array ◽  
Chemical Vapor Deposited ◽  
Cnt Arrays ◽  
Film Interface

Carbon nanotube (CNT) arrays have been directly synthesized on plasma-enhanced chemical vapor deposited diamond films in the same growth chamber. The diamond films were grown using a bias-enhanced nucleation technique that produces relatively smooth and flat films. The thermal resistances of the CNT array/diamond film interface were measured using a photoacoustic technique to be approximately 12 mm2·K/W at moderate pressures.

First Principles Prediction of Gas-Phase Composition and Substrate Temperature for Diamond Film Growth

2000 ◽  
Vol 25 (1-2) ◽  
pp. 41-51 ◽  
Author(s):  
Yanxin Li ◽  
Donald W. Brenner ◽  
Xialan Dong ◽  
Chiachung Sun
Keyword(s):  
Phase Composition ◽  
Substrate Temperature ◽  
Gas Phase ◽  
Diamond Film ◽  
First Principles ◽  
Film Growth ◽  
Diamond Film Growth

Structural investigation of the titanium/diamond film interface

1996 ◽  
Vol 80 (6) ◽  
pp. 3552-3560 ◽  
Author(s):  
M. L. Terranova ◽  
M. Rossi ◽  
G. Vitali
Keyword(s):  
Diamond Film ◽  
Structural Investigation ◽  
Film Interface

scholarly journals Face-Centered Cubic Carbon Formed at Substrate CVD Diamond Film Interface

1993 ◽  
Vol 57 (9) ◽  
pp. 975-982
Author(s):  
Yoshio Kawamura ◽  
Toshio Saburi ◽  
Tetsuo Yashiki ◽  
Tetsuo Nakai ◽  
Shuji Yazu
Keyword(s):  
Diamond Film ◽  
Cvd Diamond ◽  
Face Centered Cubic ◽  
Cvd Diamond Film ◽  
Face Centered ◽  
Film Interface

scholarly journals Study of diamond film interface structure and contacting area

2009 ◽  
Vol 12 (1) ◽  
pp. 89-94 ◽  
Author(s):  
Paisan Setasuwon ◽  
Thanapak Metanawin
Keyword(s):  
Diamond Film ◽  
Interface Structure ◽  
Film Interface

Superlubrication properties of ultra-nanocrystalline diamond film sliding against a zirconia ball

RSC Advances ◽  
2015 ◽  
Vol 5 (122) ◽  
pp. 100663-100673 ◽  
Author(s):  
Revati Rani ◽  
N. Kumar ◽  
A. T. Kozakov ◽  
K. A. Googlev ◽  
K. J. Sankaran ◽  
...  
Keyword(s):  
Phase Composition ◽  
Grain Boundaries ◽  
Amorphous Carbon ◽  
Diamond Film ◽  
Friction And Wear ◽  
Wear Behavior ◽  
Nanocrystalline Diamond ◽  
Friction And Wear Behavior

The friction and wear behavior of ultra-nanocrystalline diamond (UNCD) films are sensitive to the phase composition, mainly graphite and amorphous carbon (a-C), occupying the grain boundaries of sp3 hybridized diamond nanocrystals.

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