TRIBOLOGICAL AND MECHANICAL PROPERTIES OF ALUMINUM CONTAINING TETRAHEDRAL AMORPHOUS CARBON FILMS

2002 ◽  
Vol 16 (06n07) ◽  
pp. 946-951 ◽  
Author(s):  
E. Liu ◽  
J. X. Gao ◽  
B. K. Tay ◽  
X. Shi ◽  
A. Zeng
Keyword(s):  
Young’S Modulus ◽  
Amorphous Carbon ◽  
Young's Modulus ◽  
Carbon Films ◽  
Vacuum Arc ◽  
Al Content ◽  
Tetrahedral Amorphous Carbon ◽  
Atomic Force ◽  
Film Hardness ◽  
Filtered Cathodic Vacuum Arc

Tetrahedral amorphous carbon (ta-C) films which contained aluminum element were fabricated by filtered cathodic vacuum arc (FCVA) method. The tribological characteristics of the ta-C films were investigated with ball-on-disk tribometer. The increment of aluminum in the ta-C film leads to an increase of sp2 carbon bonding and a decrease of sp3 fraction in the film. The roughness of the films was measured with atomic force microscope, and the hardness and Young's modulus of the films were measured with nanoindentation. The results showed that the film hardness and Young's modulus dropped with the increase of Al content in the films. The results have been interpreted with respect to the change of sp 3 and sp 2 fractions in the ta-C:Al films.

FCVA-Synthesized Tetrahedral Amorphous Carbon Films for Biomedical Applications

2007 ◽  
Vol 336-338 ◽  
pp. 1577-1580 ◽  
Author(s):  
Chuan Lin Zheng ◽  
Wu Bao Yang ◽  
X. Chang
Keyword(s):  
Amorphous Carbon ◽  
Biomedical Applications ◽  
Pure Titanium ◽  
Carbon Films ◽  
Vacuum Arc ◽  
Negative Bias Voltage ◽  
Tetrahedral Amorphous Carbon ◽  
In Vitro Measurements ◽  
Filtered Cathodic Vacuum Arc

Tetrahedral amorphous carbon (ta-C) films were deposited onto Si(100) wafers by using filtered cathodic vacuum arc technique (FCVA). The influence of the negative bias voltage applied to substrates on film structures was studied by Raman spectroscopy, X-ray photoemission spectroscopy (XPS). The ta-C films showed maximal sp3 fractions 87%, the hardness and elastic modulus of the ta-C film is 72 and 480 GPa, respectively. In vitro measurements of contact angle and platelet adhesion were applied to evaluate the biocompatibility of the ta-C films in comparison with that of NiTi, 316L and pure titanium. The results show that the ta-C films have hydrophobicity and exhibit better hemocompatibility which are very suitable for biomedical applications.

Characterization of Boron- and Phosphorous-Incorporated Tetrahedral Amorphous Carbon Films Deposited by the Filtered Cathodic Vacuum Arc Process

2009 ◽  
Vol 48 (6) ◽  
pp. 065501 ◽  
Author(s):  
Omvir Singh Panwar ◽  
Mohd. Alim Khan ◽  
Mahesh Kumar ◽  
Sonnada Math Shivaprasad ◽  
Bukinakere Subbakrihniah Satyanarayana ◽  
...  
Keyword(s):  
Amorphous Carbon ◽  
Carbon Films ◽  
Vacuum Arc ◽  
Amorphous Carbon Films ◽  
Tetrahedral Amorphous Carbon ◽  
Filtered Cathodic Vacuum Arc
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