Wear characteristics of copper-based surface-level microcomposites and nanocomposites prepared by friction stir processing

Abstract

Abstract:In this study, microsized and nanosized silicon carbide particles (SiCps) were successfully incorporated into commercial pure copper to form a surface metal matrix composite by friction stir processing (FSP) at low-heat-input conditions. A cluster of blind holes on a copper plate was used as particle deposition technique during the fabrication of the composite. Pin-on-disc testing was performed under dry sliding conditions to determine the wear characteristics of prepared composite surfaces. The homogeneity of particle distribution both inside the copper matrix and in the wear scar was determined via microstructural observations. It was observed that both microsized and nanosized SiCps were well distributed and homogenous in a stir zone; particles observed were without defects, and good bonding was observed between SiCps and the copper matrix. Comparisons between Cu/SiCp composite layers and friction stir processed (FSPed) Cu and as-received Cu showed that Cu/SiCp nanocomposite layers exhibited superior microhardness and dry sliding wear characteristics.

Investigation of second phase concentration effects on tribological and electrical properties of Cu–WS2 composites

“…4. Typical copper peaks can be noticed at about 43° for Cu (1 1 1), at about 51° for Cu (2 0 0) and at about 74° for Cu (2 2 0) [18,20,[36][37][38][39]. Tungsten disulfide peaks are detected at about 14° for WS2 (0 0 2), near to 29° for WS2 (0 0 4), at 44° for WS2 (0 0 6) and at about 59° for WS2 (0 0 8) [10,18,20,40,41].…”

Oil-soluble ionic liquids as antiwear and extreme pressure additives in poly-α-olefin for steel/steel contacts

“…Friction coefficient (COF) and wear volume can intuitively reflect the friction-reducing and AW performance of lubricants [27][28][29]. Therefore, the tribological properties of neat PAO10 and the mixtures with various mass concentrations of N 88816 S P and P 888S S P are investigated at 300 N, 25 Hz, and RT, as described in Fig.…”

“…EDS as a powerful tool has been widely adopted to investigate the accurate section-distribution of elements of wear scar surfaces [29,32,42]. To further study the lubricating mechanism, the section-distribution of P, S, Zn, and N of wear scars lubricated by ZDDP, P 888S S P , and N 88816 S P at 300 N and 25 Hz, as illustrated in Fig.…”

Tribocorrosion behavior of nickel-aluminium bronze sliding against alumina under the lubrication by seawater with different halide concentrations

“…4 and 5. Moreover, grooves on wear scars were observed to be parallel to the sliding direction, which provided the evidence of abrasion during the rubbing process [26,27]. This abrasive wear was further confirmed by the ribbon-like wear debris formed throughout the course when hard asperities on the Al 2 O 3 pin counterface continuously slid across the metal surface (as shown in Figs.…”