@Article{BahlerPecBruCabTra:2018:StPrSu,
author = "Bahler, Eugenia Laura Dalibon and Pecina, Jorge Nahuel and Bruhl,
Sonia Patr{\'{\i}}cia and Cabo, Amado and Trava-Airoldi,
Vladimir Jesus",
affiliation = "{} and {} and {} and {} and {Instituto Nacional de Pesquisas
Espaciais (INPE)}",
title = "Steel protection for surgical instruments with carbon-based hard
coatings type DLC",
journal = "Mat{\'e}ria",
year = "2018",
volume = "23",
number = "2",
pages = "e12062",
keywords = "DLC coatings, AISI 420, wear, corrosion, surgical instruments.",
abstract = "Martensitic stainless steels can be used in different applications
such as surgical instruments where a good wear and corrosion
resistance are required. Surface modification treatments such as
nitriding improve the mechanical properties of these steels,
however; they affect the corrosion resistance. For this reason,
the DLC (Diamond Like Carbon) coatings deposition can be
convenient. The wear and corrosion behaviour was studied in duplex
samples (nitrided and PACVD coated) and they were compared with
nitrided and only coated samples and with those without treatment,
only heat treated (quench and tempering). The coatings were
analyzed by Raman spectroscopy and EDS. Pin on disk tests were
performed and the adhesion was evaluated using Scratch Test and
Rockwell C Indentation. The nano hardness was measured with a
Berkovich indenter. The corrosion tests for surgical instruments
(according to the Standard ASTM F 1089-02) and Spray Salt Fog
tests were carried out. In the DLC coatings, the I-D/IG ratio was
0.8 and the hydrogen content was calculated and resulted to be
about 20 %. The coating thickness was 2 mu m and the hardness
reached 24 GPa. The nitrided layer thickness was 10 mu m. The
duplex and coated samples presented low friction coefficient and
the wear volume loss was undetectable. The coatings had good
corrosion behaviour in the corrosion tests. Nevertheless, the
nitrided sample presented a corroded region in the copper sulfate
and boil tests. The duplex samples had better adhesion than the
coated samples in scratch test and indentation Rockwell C.",
doi = "10.1590/81517-707620180002.0398",
url = "http://dx.doi.org/10.1590/81517-707620180002.0398",
issn = "1517-7076",
language = "en",
urlaccessdate = "26 abr. 2024"
}