Diamondlike Carbon Coatings on Ti-GAl-4V

Ultrahigh-current-density metal-ion implantation and diamondlike-hydrocarbon films for tribological applications; Final report

“…pistons, bearings and shafts) were coated during the course of this work. Some of the resulting work is complete and has been described in published papers [23][24][25][26][27][28] and some is still being conducted. Papers describing some of the tribological tests conducted on these films at Colorado State and ANL are included in the Appendix to this report.…”

Applications of diamond films and related materials

“…2 (curve 1 Two implant species of nitrogen and/or carbon were used in an ion implantation apparatus provided with a mass separating unit [3]. The post-treatment conditions are shown in Table I [40][41][42][43][44][45][46][47][48][49][50] % relative hunrudity with the friction distance of one stroke of 10 mm, the contact friction speed of 10 mm per 6 s, and the indentation load of 0.98 N. (2) Basic tribological properties of c-BN coating against diamond in atmosphere and vacuum A swinging-type sliding testing machine [5] We have already reported [6] on the trial fabrication of a c-BN-coated drill following type 1 post-treatment in Table I, and its basic performance test. Although the dolls showed some utility in that they can perform better than noncoated WC-Co alloy drills.…”

“…The final roughness was further reduced either by multiple beam scanning at normal incidence or by irradiation at grazing angles. In particular, the initial surface roughness of [40][41][42][43][44][45][46][47][48][49][50] has been reduced to Rz=l /xm (peak-to-valley amplitude) in direction along the laser scan, and to Rz=3 /xm across the scan direction. …”

“…Reactively sputtered silicon carbide has been reported as a successful interlayer for improving adhesion of DLC to Ti-6A1-4V [43], whilst multilayers based on titanium have been succesful for chromium/iron substrates [44], Amorphous hydrogenated sihcon has also been used successfully as a bonding layer for a variety of substrate materials [26]. For DLC coatings on stainless steel substrates with silicon interlayer, some coating degradation has been observed on exposure to biologically relevant fluids [45].…”