Surface mechanical properties of C implanted Ni

Journal Article · Tue Mar 01 04:00:00 EST 1988 · J. Mat. Res.; (United States)

DOI:https://doi.org/10.1557/JMR.1988.0226· OSTI ID:5356378

Nastasi, M; Hirvonen, J; Jervis, T R; Pharr, G M; Oliver, W C

Nickel foils, 165 ..mu..m thick, have been carbon implanted at 300 K with 2, 3, and 4.2 x 10/sup 17/ C ions/cm/sup 2/ and implanted with a two-step implantation of 2.1 x 10/sup 17/ C/cm/sup 2/ at 300 K followed by 2.1 x 10/sup 17/ C/cm/sup 2/ at 77 K. All implantations performed at 300 K result in the formation of the metastable phase Ni/sub 3/C while the two-step implantation produces an amorphous Ni/C alloy. Surface mechanical property studies showed that both the surface hardness and wear properties are correlated with chemistry (carbon dose), and that the friction coefficient is additionally dependent on the surface microstructure. It was found that both the wear rate and coefficient of friction were reduced as the volume fracion of Ni/sub 3/C increased. At the highest dose implanted, 4.2 x 10/sup 17/ C/cm/sup 2/, the coefficient of friction was found to be lower for the sample implanted half at 300 K and half at 77 K and possessing an amorphous structure compared to the sample implanted entirely at 300 K and possessing a crystalline Ni/sub 3/C structure. Increases in the surface hardness were also observed with increasing carbon content, with the greatest hardness observed in samples implanted to a total dose of 4.2 x 10/sup 17/ C/cm/sup 2/. The hardness at this dose was not dependent on the implant conditions or the metastable phase formed.

• Research Organization: Los Alamos National Laboratory, Materials Science and Technology Division, Los Alamos, New Mexico 87545
• DOE Contract Number: AC05-76OR00033; AC05-84OR21400
• OSTI ID: 5356378
• Journal Information: J. Mat. Res.; (United States), Journal Name: J. Mat. Res.; (United States) Vol. 3:2; ISSN JMREE
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360106* -- Metals & Alloys-- Radiation Effects
ALLOYS
AMORPHOUS STATE
CARBON IONS
CHARGED PARTICLES
ELEMENTS
ENERGY RANGE
FOILS
FRICTION
HARDNESS
ION IMPLANTATION
IONS
KEV RANGE
KEV RANGE 10-100
MECHANICAL PROPERTIES
METALS
NICKEL
NICKEL ALLOYS
SURFACE PROPERTIES
TRANSITION ELEMENTS
WEAR RESISTANCE