Tribological properties of fullerenes C{sub 60} and C{sub 70} microparticles

Journal Article · Fri Nov 01 04:00:00 EST 1996 · Journal of Materials Research

DOI:https://doi.org/10.1557/JMR.1996.0349· OSTI ID:399778

Zhao, W; Tang, J; Puri, A ^[1]; Sweany, R L ^[2]; Li, Y; Chen, L ^[3]

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1. Department of Physics, University of New Orleans, New Orleans, Louisiana 70148 (United States)
2. Department of Chemistry, University of New Orleans, New Orleans, Louisiana 70148 (United States)
3. Institute of Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing 100080 (China)

The frictional behaviors of fullerenes C{sub 60} and C{sub 70} were studied because they were speculated to be solid lubricants. For the sublimated pure C{sub 60} films on Si(001), a high friction coefficient (0.55{endash}0.8) was observed under different loads and pin materials. For the C{sub 70} film, the friction coefficient showed a pin dependence, which changed from 0.5 with an Al{sub 2}O{sub 3} pin to about 0.9 with a 440 stainless steel pin. The relatively high friction coefficients of C{sub 60} and C{sub 70} films were due to the tendency of the C{sub 60} and C{sub 70} particles to clump and compress into high shear strength layers rather than due to the impurities in the fullerenes. The benzene-solvated C{sub 60}{center_dot}4C{sub 6}H{sub 6} and C{sub 70}{center_dot}{ital x}C{sub 6}H{sub 6} showed a lowered friction coefficient (0.25 for C{sub 60}{center_dot}4C{sub 6}H{sub 6} and 0.3 for C {sub 70}{center_dot}{ital x}C{sub 6}H{sub 6}), which might result from the lowered shear strength of the hcp structure of C{sub 60}{center_dot}4C{sub 6}H{sub 6} and C{sub 70}{center_dot}{ital x}C{sub 6}H{sub 6} molecular crystals in which the benzene molecules were intercalated. {copyright} {ital 1996 Materials Research Society.}

• OSTI ID: 399778
• Journal Information: Journal of Materials Research, Journal Name: Journal of Materials Research Journal Issue: 11 Vol. 11; ISSN JMREEE; ISSN 0884-2914
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM OXIDES
BENZENE
CRYSTAL STRUCTURE
FULLERENES
MOLECULAR CRYSTALS
PARTICULATES
SLIDING FRICTION
SOLVATION
STAINLESS STEELS
THIN FILMS