@Article{KostovUeLeSoGoSiRe:2004:SuMoMe,
author = "Kostov, K. G. and Ueda, M{\'a}rio and Lepiensky, A. and Soares
J{\'u}nior, P. C. and Gomes, Geraldo Francisco and Silva, M. M.
and Reuther, H.",
affiliation = "Sofia University, Department of General Physics and Instituto
Nacional de Pesquisas Espaciais, Laborat{\'o}rio Associado de
Plasma (INPE.LAP) and {Universidade Federal do Paran{\'a}.
Departamento de F{\'{\i}}sica (UFPR)} and {Universidade Federal
do Paran{\'a}. Departamento de F{\'{\i}}sica (UFPR)} and
Instituto Nacional de Pesquisas Espaciais, Laborat{\'o}rio
Associado de Plasma (INPE.LAP) and {Instituto Tecnol{\'o}gico de
Aeron{\'a}utica. Departamento de Engenharia Mec{\^a}nica (ITA)}
and {Institute of Ion Beam Physics and Material Research}",
title = "Surface modification of metal alloys by plasma immersion ion
implantation and subsequent plasma nitriding",
journal = "Surface and Coatings Technology",
year = "2004",
volume = "186",
number = "1-2",
pages = "204--208",
month = "Aug.",
keywords = "PLASMA, Plasma nitriding, Plasma-immersion ion implantation,
Duplex treatment, AES, XRD, Hardness , Stainless-steel, PLASMA,
Nitrido de plasma, Implanta{\c{c}}{\~a}o i{\^o}nica por
imers{\~a}o em plasma, Tratamento duplo.",
abstract = "Thermal or radiation enhanced diffusion of nitrogen are
extensively utilized for the surface hardening of metallic
components. Plasma-immersion ion implantation (PIII) is a newly
developed technology, which provides ion implantation at moderate
energy (10-50 keV), and thereby allowing penetration depths deeper
than the surface oxide barrier. The damage caused by ion
implantation together with the surface sputtering may create
favorable boundary conditions for an efficient subsequent
diffusive treatment such as nittiding. Surface modification of
aluminum alloy 5052, Ti6A14V alloy and steels (AISI 304 and H13)
by a combination of PIII and plasma nitriding (PN) has been
investigated. Nitrogen ions were implanted into specimens at 15 W
and then ion nitrided at low pressure with bias of - 800 V.
Compared to the untreated samples the hardness of Ti6Al4V alloy
and AISI 304 steel could be improved significantly. The hardness
of H13 steel can be increased by 20% using a duplex process with
4-h nitriding time. X-ray diffraction (XRD) results have shown
some structural modification of the metallic samples and formation
of a double-layer structure in AISI 304, treated by PIII and PN.
Nitrogen depth profile of the same stainless steel sample,
obtained by Auger electron spectroscopy (AES), shows two rather
well-defined nitrogen enriched regions with different N contents:
high (25-30 at.%) in a surface layer and medium (similar to 10%)
in a subsurface layer.",
copyholder = "SID/SCD",
doi = "10.1016/j.surfcoat.2004.04.027",
url = "http://dx.doi.org/10.1016/j.surfcoat.2004.04.027",
issn = "0257-8972",
language = "en",
targetfile = "surface modification.pdf",
urlaccessdate = "02 maio 2024"
}