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Tribological Properties of Nitrogen Implanted and Boron Implanted Steels

Published online by Cambridge University Press:  15 February 2011

K. T. Kern ,
K. C. Walter ,
S. Fayeulle ,
A. J. Griffin Jr., ,
H. Kung ,
Y. Lu ,
M. Nastasi  and
J. R. Tesmer
K. T. Kern
Affiliation:
Center for Materials Research, Norfolk State University, Norfolk, VA 23504, K_Kern@lanl.gov
K. C. Walter
Affiliation:
Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, NM 87545
S. Fayeulle
Affiliation:
Laboratore MNMP URACNRS 447 Ecole Centrale De Lyon, Ecully, France.
A. J. Griffin Jr.,
Affiliation:
Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, NM 87545
H. Kung
Affiliation:
Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, NM 87545
Y. Lu
Affiliation:
Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, NM 87545
M. Nastasi
Affiliation:
Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, NM 87545
J. R. Tesmer
Affiliation:
Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, NM 87545
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Abstract

Samples of steel with high chrome content were implanted separately with 75 keV nitrogen ions and with 75 keV boron ions. Implanted doses of each ion species were 2-,4- and 8 × 1017 /cm2. Retained doses were measured using resonant non-Rutherford Backscattering Spectrometry. Tribological properties were determined using a pin-ondisk 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 377g. 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 Fe2N and Fe3N in the nitrogen implanted materials and Fe3B in the boron implanted materials. Results from transmission electron microscopy will be presented.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 436: Symposium CC – Thin Films Stresses and Mechanical Properties VI , 1996 , 305
Copyright
Copyright © Materials Research Society 1997

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