On the adhesion and wear resistance of DLC films deposited on nitrile butadiene rubber: A Ti-C interlayer

Abstract

To promote the adhesion strength between diamond-like carbon (DLC) films and nitrile butadiene rubber (NBR) substrates, titanium-doped carbon (Ti-C) films prepared by dual-target magnetron sputtering under varied substrate bias voltages were used as an interlayer on the rough NBR. The surface topography and structure of Ti-C films were investigated by atomic force microscopy (AFM) and Raman spectra. Raman analysis indicates that the increase of substrate bias voltage leads to an increase of the number or the size of sp 2 clusters in the Ti-C interlayer. The adhesion strength and tribological properties of DLC films coated on NBR substrate were scrutinized by a scratch tester and a ball-on-disk tribometer, respectively. It was found that DLC film with a Ti-C interlayer at a certain bias voltage exhibited superior wear resistance with a low coefficient of friction (CoF) during the sliding of 6000 laps. No clear damages in the coatings were observed from the wear tracks. Besides, the scratch test also revealed a reliable adhesion when the interlayer was prepared at −150 V, as confirmed by a scratch crack width of~50 μm as compared to that of the pure DLC film increasing to~120 μm. Therefore, a Ti-C interlayer could significantly enhance the adhesion and wear resistance of DLC thin films deposited on NBR.

Effect of Fluorine Incorporation on DLC Films Deposited by Pulsed Cathodic Arc Deposition on Nitrile Butadiene Rubber and Polyurethane Rubber Substrates

“…There is a slight shift to the higher wavenumber as the incorporation of F in the film for the D peak position whereas the G peak positions are approximately the same for both films. The similar ID/IG ratios and G peak positions suggest that there is a similar amount of graphite clusters in both deposited films [26,27], which means that 4% F content does not impose a significant effect on the chemical structure of deposited thin films. The coefficients of friction (COFs) of uncoated NBR, PU rubber samples, DLC and F-DLC coated rubbers are shown in Figure 3.…”

Microorganisms@aMIL-125 (Ti): An Amorphous Metal–Organic Framework Induced by Microorganisms and Their Applications

“… 37 Moreover, as shown in Figure S5f (Supporting Information), the P 2p high-resolution XPS spectra of yeast cells can be deconvoluted into two peaks at 133.06 eV (P–O) and 134.07 eV (C–O–P), 38 , 39 which confirms the presence of −PO 3 on the surface of yeast cells. After the formation of yeast@ a MIL-125 (Ti) composites, it could be clearly observed that the peaks at 283.2, 528.94, 531.11, 400.35, 132.06, and 133.31 eV were attributed to C–Ti–O, 40 lattice oxygen (O 2– ), 34 Ti–OH, 33 , 41 N–C=O, 42 P–C, and P–O bonds, 38 respectively, suggesting no characteristic binding energy of Ti–N (456.4 eV) and Ti–P bonds (455.40 eV). 43 Notably, the binding energies and atomic proportions (atom %) of C 1s, O 1s, N 1s, and P 2p in −COOH, −OH, amide and −PO 3 groups have significantly changed after the formation of yeast@ a MIL-125 (Ti) composites ( Figure S5c–f , Supporting Information).…”

Harsh Sliding Wear of a Zirconia Ball against a-C:H Coated CoCrMo Disc in Hyaluronic Gel

“…There are manifold options to reach improved coating stability in addition to mere graded a-C:H microstructures. Supporting interlayers-such as TiC, TiAlC, TiAlN, TiAlC, and SiN x interlayer-are state of the art or state of research [23][24][25][26] for several applications. The long-term effect of any interlayer in biomedical environment and other changes on the tribological system need to be verified.…”