Special Features of the Electrochemistry of Undoped Tetrahedral Amorphous Carbon (ta-C) Thin Films

2018 ◽  
pp. 856-862
Author(s):  
T. Laurila ◽  
M.A. Caro
Keyword(s):  
Thin Films ◽  
Amorphous Carbon ◽  
Tetrahedral Amorphous Carbon

scholarly journals Elastic Constants of Diamond-Like Carbon Films by Surface Brillouin Scattering

1999 ◽  
Vol 593 ◽  
Author(s):  
A.C. Ferrari ◽  
J. Robertson ◽  
R. Pastorelli ◽  
M.G. Beghi ◽  
C.E. Bottani
Keyword(s):  
Thin Films ◽  
Amorphous Carbon ◽  
Elastic Constants ◽  
Acoustic Waves ◽  
Brillouin Scattering ◽  
Surface Acoustic Waves ◽  
Carbon Films ◽  
Diamond Like Carbon ◽  
Amorphous Carbon Films ◽  
Tetrahedral Amorphous Carbon

ABSTRACTThe elastic constants of thin Diamond-Like Carbon (DLC) films supply important information, but their measurement is difficult. Standard nanoindentation does not directly measure the elastic constants and has strong limitations particularly in the case of hard thin films on softer substrates, such as tetrahedral amorphous carbon on Si. Surface acoustic waves provide a better mean to investigate elastic properties. Surface Brillouin scattering (SBS) intrinsically probes acoustic waves of the wavelength which is appropriate to test the properties of films in the tens to hundreds of nanometers thickness range. SBS can be used to derive all the isotropic elastic constants of hard-on-soft and soft-on-hard amorphous carbon films of different kinds, with thickness down to less than 10 nm. The results help to resolve the previous uncertainties in mechanical data. The Young's modulus of tetrahedral amorphous carbon (ta-C) turns out to be lower than that of diamond, while the moduli of hydrogenated ta-C (ta-C:H) are considerably lower than those of ta-C because of the weakening effect of C-H bonding.

Tetrahedral amorphous-carbon thin films for silicon-on-insulator application

2002 ◽  
Vol 80 (5) ◽  
pp. 743-745 ◽  
Author(s):  
Z. R. Song ◽  
Y. H. Yu ◽  
C. L. Li ◽  
S. C. Zou ◽  
F. M. Zhang ◽  
...  
Keyword(s):  
Thin Films ◽  
Amorphous Carbon ◽  
Silicon On Insulator ◽  
Tetrahedral Amorphous Carbon ◽  
Carbon Thin Films

scholarly journals Elastic Constants of Diamond Like Carbon Films by Surface Brillouin Scattering

1999 ◽  
Vol 594 ◽  
Author(s):  
A. C. Ferrari ◽  
J. Robertson ◽  
R. Pastorelli ◽  
M. G. Beghi ◽  
C. E. Bottani
Keyword(s):  
Thin Films ◽  
Amorphous Carbon ◽  
Elastic Constants ◽  
Acoustic Waves ◽  
Brillouin Scattering ◽  
Surface Acoustic Waves ◽  
Carbon Films ◽  
Diamond Like Carbon ◽  
Amorphous Carbon Films ◽  
Tetrahedral Amorphous Carbon

AbstractThe elastic constants of thin Diamond-Like Carbon (DLC) films supply important information, but their measurement is difficult. Standard nanoindentation does not directly measure the elastic constants and has strong limitations particularly in the case of hard thin films on softer substrates, such as tetrahedral amorphous carbon on Si. Surface acoustic waves provide a better mean to investigate elastic properties. Surface Brillouin scattering (SBS) intrinsically probes acoustic waves of the wavelength which is appropriate to test the properties of films in the tens to hundreds of nanometers thickness range. SBS can be used to derive all the isotropic elastic constants of hard-on-soft and soft-on-hard amorphous carbon films of different kinds, with thickness down to less than 10 nm. The results help to resolve the previous uncertainties in mechanical data. The Young's modulus of tetrahedral amorphous carbon (ta-C) turns out to be lower than that of diamond, while the moduli of hydrogenated ta-C (ta-C:H) are considerably lower than those of ta-C because of the weakening effect of C-H bonding.

scholarly journals Characterization and electrochemical properties of iron-doped tetrahedral amorphous carbon (ta-C) thin films

RSC Advances ◽  
2018 ◽  
Vol 8 (46) ◽  
pp. 26356-26363 ◽  
Author(s):  
Jarkko Etula ◽  
Niklas Wester ◽  
Sami Sainio ◽  
Tomi Laurila ◽  
Jari Koskinen
Keyword(s):  
Thin Films ◽  
Electrochemical Properties ◽  
Amorphous Carbon ◽  
Tetrahedral Amorphous Carbon ◽  
Surface Iron ◽  
Iron Doped ◽  
Carbon Surfaces

Surface iron levels as low as 0.4 at% (XPS) can considerably change the electrochemical properties of initially inert carbon surfaces.

Strongly adhering and thick highly tetrahedral amorphous carbon (ta–C) thin films via surface modification by implantation

2001 ◽  
Vol 16 (1) ◽  
pp. 5-8 ◽  
Author(s):  
M. Chhowalla ◽  
G. A. J. Amaratunga
Keyword(s):  
Thin Films ◽  
Amorphous Carbon ◽  
Ion Bombardment ◽  
Vacuum Arc ◽  
Growth Surface ◽  
Simple Modification ◽  
Metallic Substrates ◽  
Tetrahedral Amorphous Carbon ◽  
Protective Overcoats ◽  
Poor Adhesion

Highly tetrahedral amorphous carbon thin films have exceptional mechanical properties that make them ideal for many challenging wear applications such as protective overcoats for orthopaedic prostheses and aerospace components. However, the use of ta–C in many wear applications is limited due to the poor adhesion and the inability to grow thick films because of the large compressive stress. Here we report on a simple modification of the substrate growth surface by 1-keV ion bombardment using a cathodic vacuum arc (CVA) plasma prior to deposition of ta–C films at 100 eV. The 1-keV C+ ion bombardment created a thin intermixed layer consisting of substrate and carbon atoms. The generation of the intermixed carbide layer improved the adhesion and allowed the growth of thick (several μm) ta–C layers on metallic substrates.

Sign in / Sign up

Export Citation Format

Share Document