@MastersThesis{Mansur:2016:TrFiFi,
author = "Mansur, Raquel Alvim de Figueiredo",
title = "Tratamento de filmes finos de cromo por implanta{\c{c}}{\~a}o
i{\^o}nica por imers{\~a}o em plasma de nitrog{\^e}nio",
school = "Instituto Nacional de Pesquisas Espaciais (INPE)",
year = "2016",
address = "S{\~a}o Jos{\'e} dos Campos",
month = "2016-05-30",
keywords = "plasma, filme fino, cromo, implanta{\c{c}}{\~a}o i{\^o}nica,
nitrog{\^e}nio, plasma, thin film, chromium, ion implantation,
nitrogen.",
abstract = "O objetivo deste trabalho {\'e} avaliar o comportamento da
superf{\'{\i}}cie do filme de cromo, depositado em a{\c{c}}o
carbono (SAE 1070) atrav{\'e}s da t{\'e}cnica \emph{Magnetron
Sputtering} e tratado posteriormente com nitrog{\^e}nio,
atrav{\'e}s de implanta{\c{c}}{\~a}o i{\^o}nica por
imers{\~a}o em plasma (3IP). Para o tratamento 3IP utilizam-se
duas fontes de plasma distintas: descarga DC e descarga tipo
catodo oco, com varia{\c{c}}{\~a}o do tempo de tratamento. Esses
dois experimentos foram realizados sequencialmente e sem quebra de
v{\'a}cuo, na mesma c{\^a}mara. Realizou-se tamb{\'e}m
tratamentos de 3IP nas temperaturas de 400\$^{o}\$C,
500\$^{o}\$C e 600\$^{o}\$C em outro sistema de
implanta{\c{c}}{\~a}o (3IPAT), ap{\'o}s a deposi{\c{c}}{\~a}o
do filme. Ap{\'o}s os tratamentos, realizaram-se as seguintes
caracteriza{\c{c}}{\~o}es: DRX por {\^a}ngulo rasante, XPS,
AFM, MEV, avalia{\c{c}}{\~a}o das propriedades
tribol{\'o}gicas, nanoindenta{\c{c}}{\~a}o, esclerometria e
estudos de corros{\~a}o. A an{\'a}lise por XPS mostrou a
forma{\c{c}}{\~a}o de nitretos de cromo. O ensaio de tribologia
mostrou redu{\c{c}}{\~a}o do coeficiente de atrito,
principalmente para a amostra com tempo de duas horas de
implanta{\c{c}}{\~a}o. Todas as amostras tratadas por 3IP
apresentaram aumento da dureza e da resist{\^e}ncia ao risco.
Quanto {\`a} corros{\~a}o, n{\~a}o foi evidenciada
influ{\^e}ncia no potencial eletroqu{\'{\i}}mico. Os resultados
obtidos comprovaram a efic{\'a}cia do tratamento 3IP em filmes
finos quanto {\`a} forma{\c{c}}{\~a}o de nitretos e {\`a}
melhoria das suas propriedades superficiais. ABSTRACT: The aim of
this study is to evaluate the behavior of the chromium surface
film, deposited on carbon steel (SAE 1070) by Magnetron Sputtering
and treated with nitrogen, by plasma immersion ion implantation
(PIII). For the PIII treatment, two sources were used: DC
discharge and hollow cathode discharge, with variation of the
treatment time. These two experiments were carried out in sequence
and without breaking vacuum, in the same chamber. PIII treatments
were also done at temperatures of 400\$^{o}\$ C, 500\$^{o}\$ C
and 600\$^{o}\$ C in another implantation system (HTPIII), after
the film deposition. After the treatments, the following
characterizations were done: grazing incidence XRD, XPS, AFM, SEM,
evaluation of tribological properties, Nanoindentation, scratch
testing and corrosion studies. XPS analysis showed the formation
of chromium nitrides. Tribology tests showed a reduction in the
friction coefficient, mainly for the sample with 2 hours of
implantation. All treated samples presented high hardness and
scratch resistance. For corrosion, there was no evident influence
on the electrochemical potential. The obtained results have proved
the effectiveness of PIII treatment on thin films with the
formation of nitrides and the improvement of their surface
properties.",
committee = "Mello, Carina Barros (presidente/orientadora) and Ueda, Mario
(orientador) and Oliveira, Rog{\'e}rio de Moraes and Vasconcelos,
Get{\'u}lio de",
copyholder = "SID/SCD",
englishtitle = "Treatment of chrome thin films by plasma immersion ion
implantation",
language = "pt",
pages = "143",
ibi = "8JMKD3MGP3W34P/3LREU95",
url = "http://urlib.net/ibi/8JMKD3MGP3W34P/3LREU95",
targetfile = "publicacao.pdf",
urlaccessdate = "03 jun. 2024"
}