@Article{SilvaUeMeCoLe:2008:EfHiTe,
author = "Silva, Leide Lili G. da and Ueda, M\á and rio and Mello,
Carina Barros de and Cordaro, E. N. and Lepienski, C. M.",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de
Pesquisas Espaciais (INPE)} and Department of Physics and
Chemistry, S\ã and {o Paulo State University-UNESP} and
Department of Physics, Federal University of Paran",
title = "Effects of the high temperature plasma immersion ion implantation
(PIII) of nitrogen in AISI H13 steel",
journal = "Journal of Materials Science",
year = "2008",
volume = "43",
number = "17",
pages = "5989--5997",
month = "Sept.",
abstract = "In this paper we report the effect of high temperature PIII of
nitrogen on the chemical and physical properties of AISI H13
steel. The implantation of H13 steels was carried out at different
temperatures ranging between 300 C and 720 C. After the treatment,
the surface morphology was drastically changed as observed by SEM
analysis. Nitrogen penetration depth reaching up to 12 {\^E}m was
achieved at 620 C and 720 C. The maximum hardness of about 592 HV
was obtained for the sample treated at 470 C that is 17% higher
than for untreated specimen. There was a decrease of the hardness
values for temperatures above 470 C. The same hardness behavior
with the temperature was confirmed by nanoindentation testing.
Although an enriched nitrogen layer was obtained, no evidence of
nitride compounds was detected by XRD analyses. On the other hand,
improvements of the H13 steel tribological properties and
corrosion resistance were obtained. The wear tests were conducted
by pin-on-disk tribometer (rotating mode). The wear volume
decreased by factor of 4.5 compared to the standard tempered and
annealed H13 steel and 2.6 times reduction of the coefficient of
friction was achieved. The electrochemical measurements were
performed in 3.5% NaCl solution, pH = 6. Open circuit potential
curves showed that the potentials are nobler for the PIII treated
samples than for untreated specimen. In addition, the corrosion
current density of the samples treated at 620 C and 720 C
diminished to 3 ~ 10\−8 A/cm2.",
doi = "10.1007/s10853-008-2768-x",
url = "http://dx.doi.org/10.1007/s10853-008-2768-x",
issn = "0022-2461 and 1573-4803",
targetfile = "effects.pdf",
urlaccessdate = "15 jun. 2024"
}