Title of article
Mechanical and tribological characterization of tetrahedral diamond-like carbon deposited by femtosecond pulsed laser deposition on pre-treated orthopaedic biomaterials
Author/Authors
A.-S. Loir، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2005
Pages
7
From page
225
To page
231
Abstract
Femtosecond pulsed laser deposition (PLD) has been performed using a mode-locked Ti:sapphire laser including an
amplification stage (150 fs, 800 nm, 1 kHz) to deposit tetrahedral-amorphous carbon films (ta-C) on AISI 316L stainless steel
and ultra high molecular weight polyethylene, in perspective to extend the wear resistance of materials used in hip joints. Ta-C
films have been elaborated in high vacuum conditions at room temperature. The diamond-like coated silicon substrates exhibit
high wear resistance (in the 10 8–10 9 mm3 (N m) 1 range) with moderate hardness (in the 20–30 GPa range), which may be
favorable for the accommodation motion between contacting surfaces in a hip joint. In situ sputter cleaning of the orthopaedic
substrates in argon plasma prior to carbon deposition has been investigated, leading to the enhancement of the adhesion of the
films onto the stainless steel substrates. The adhesion properties of films deposited in various conditions on metallic substrates
have been studied by tensile tests. The tribological behavior of the coatings deposited on cleaned substrates have been widely
investigated in a pin-on-flat configuration in ambient air and Ringer solution. Finally, a DLC thin film with an homogeneous
thickness has been deposited on hemispherical surface of 22.2 mm in diameter of a stainless steel femoral head of a hip
prosthesis, whose wear behavior will be quantified using a hip joint simulator during one million of cycles (corresponding to the
human activity during one year).
Keywords
Femtosecond pulsed laser deposition , Hip joint , Biomaterials , Tetrahedral diamond-like carbon
Journal title
Applied Surface Science
Serial Year
2005
Journal title
Applied Surface Science
Record number
1001104
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