Performances tribologiques de l’acier inoxydable, du TMA et du Cu-NiTi recouverts de DLC

Effects of sp2/sp3 Ratio and Hydrogen Content on In Vitro Bending and Frictional Performance of DLC-Coated Orthodontic Stainless Steels

“…Several recent studies of DLC coating reported excellent frictional properties [9][10][11][12][18][19][20], fine cell growth with non-cytotoxicity [18], less bacterial adhesion [32] and inhibited biofilm formation on the metal with DLC coatings [33]. Similarly, the progressive-load scratch test in the present study revealed that both DLC-coated disk specimens (DLC-1, DLC-2) displayed significantly lower frictional forces than the non-coated disk specimens.…”

“…DLC coatings using PBIID methods provide hardnesses ranging from 6 to 20 GPa, depending on the deposition conditions [16,18,19]. The hardness of the DLC layers determined by nanoindentation testing in this study ranged from 9.18 to 9.69 GPa (when measured at a depth of ca.…”

“…This technique has attracted significant attention for biomedical applications, such as artificial joints, cardiac stents and orthodontic archwires [17]. Concerning orthodontic applications, experimental DLC-coated orthodontic wires have been studied by several research groups [9][10][11][12][18][19][20]. One study reported that DLC layers protect against the diffusion of Ni and its release at the surface of Ni-Ti archwires and that these coatings are noncytotoxic in corrosive environments [18].…”

“…One study reported that DLC layers protect against the diffusion of Ni and its release at the surface of Ni-Ti archwires and that these coatings are noncytotoxic in corrosive environments [18]. Other studies have investigated the effect of DLC coatings on the friction of orthodontic wires and found that DLC-coated wires produced less frictional resistance than non-coated wires [9][10][11][12][18][19][20]. The properties of a DLC coating depend on the hydrogen content, sp 2 /sp 3 ratio and presence of doping elements [21,22].…”