Tribological properties of nitrogen implanted and boron implanted steels

Technical Report · Sat Jun 01 04:00:00 EDT 1996

DOI:https://doi.org/10.2172/251356· OSTI ID:251356

Kern, K T ^[1]; Walter, K C; Griffin, Jr, A J; Kung, H; Lu, Y; Nastasi, M; Tesmer, J R ^[2]; Fayeulle, S ^[3]

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1. Norfolk State Univ., VA (United States). Center for Materials Research
2. Los Alamos National Lab., NM (United States). Materials Science and Technology Div.
3. Ecole Centrale De Lyon, Ecully (France)

Samples of a steel with high chrome content was implanted separately with 75 keV nitrogen ions and with 75 keV boron ions. Implanted doses of each ion species were 2-, 4-, and 8 {times} 10{sup 17}/cm{sup 2}. Retained doses were measured using resonant non-Rutherford Backscattering Spectrometry. Tribological properties were determined using a pin-on-disk test with a 6-mm diameter ruby pin with a velocity of 0.94 m/min. Testing was done at 10% humidity with a load of 377 g. Wear rate and coefficient of friction were determined from these tests. While reduction in the wear rate for nitrogen implanted materials was observed, greater reduction (more than an order of magnitude) was observed for boron implanted materials. In addition, reduction in the coefficient of friction for high-dose boron implanted materials was observed. Nano-indentation revealed a hardened layer near the surface of the material. Results from grazing incidence x-ray diffraction suggest the formation of Fe{sub 2}N and Fe{sub 3}N in the nitrogen implanted materials and Fe{sub 3}B in the boron implanted materials. Results from transmission electron microscopy will be presented.

• Research Organization: Los Alamos National Lab., NM (United States); Norfolk State Univ., VA (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-36; FG01-94EW11493
• OSTI ID: 251356
• Report Number(s): LA-UR--96-1321; CONF-960401--46; ON: DE96010479
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
EXPERIMENTAL DATA
FRICTION
ION IMPLANTATION
IRON BORIDES
IRON NITRIDES
MECHANICAL TESTS
MICROSTRUCTURE
STEELS
TRIBOLOGY
WEAR RESISTANCE