Surface chemical and nanomechanical aspects of air PIII-treated Ti and Ti-alloy

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Plasma immersion ion implantation (PIII) of Ti and Ti6Al4V alloy in dry air plasma has been performed with 25 kV negative pulses up to 1.9×1018 cm-2 doses. For comparison, prolonged (50-100 h), high-temperature (600-650 °C) heat treatment of a similar Ti-alloy in air (TO treatment) was also performed. The changes in chemical composition, structure and hardness of the modified surfaces were studied by XPS, X-ray diffraction (XRD) analysis and nanoindentation measurements. According to XPS, surface oxidation and strong surface enrichment of Al occurred on the Ti-alloys after both the "non-equilibrium" PIII treatment and the "equilibrium" TO treatment. After the air PIII treatment Ti and Al were present in fully oxidized (TiO2 and Al2O3) states, and neither nitrogen nor vanadium could be detected in the topmost layer. XRD showed the formation of rutile and substoichiometric TiO2-x phases on the PIII-treated Ti and TO-treated Ti-alloy, but no crystalline oxide phase was found on the PIII-treated Ti-alloy. The surface hardness and the scratch resistance of the samples increased significantly after PIII treatment. The surface hardening and the improved scratch resistance of the oxidized Ti-alloy samples can be explained mainly by the surface segregation of Al and the formation of a layer containing oxidized Ti and Al.

Original languageEnglish
Pages (from-to)248-254
Number of pages7
JournalSurface and Coatings Technology
Volume186
Issue number1-2 SPEC. ISS.
DOIs
Publication statusPublished - Aug 2 2004

Fingerprint

Ion implantation
submerging
ion implantation
Plasmas
air
Air
hardness
X ray photoelectron spectroscopy
Hardness
nonequilibrium plasmas
Surface segregation
Vanadium
nanoindentation
diffraction
hardening
rutile
vanadium
Nanoindentation
chemical composition
heat treatment

Keywords

  • Nanomechanical properties
  • Ti
  • Ti6Al4V
  • XPS
  • XRD

ASJC Scopus subject areas

  • Surfaces, Coatings and Films
  • Condensed Matter Physics
  • Surfaces and Interfaces

Cite this

Surface chemical and nanomechanical aspects of air PIII-treated Ti and Ti-alloy. / Tóth, A.; Mohai, M.; Ujvári, T.; Bell, T.; Dong, H.; Bertóti, I.

In: Surface and Coatings Technology, Vol. 186, No. 1-2 SPEC. ISS., 02.08.2004, p. 248-254.

Research output: Contribution to journalArticle

@article{e24be99e90264d7ab3e9243b3c9002d1,
title = "Surface chemical and nanomechanical aspects of air PIII-treated Ti and Ti-alloy",
abstract = "Plasma immersion ion implantation (PIII) of Ti and Ti6Al4V alloy in dry air plasma has been performed with 25 kV negative pulses up to 1.9×1018 cm-2 doses. For comparison, prolonged (50-100 h), high-temperature (600-650 °C) heat treatment of a similar Ti-alloy in air (TO treatment) was also performed. The changes in chemical composition, structure and hardness of the modified surfaces were studied by XPS, X-ray diffraction (XRD) analysis and nanoindentation measurements. According to XPS, surface oxidation and strong surface enrichment of Al occurred on the Ti-alloys after both the {"}non-equilibrium{"} PIII treatment and the {"}equilibrium{"} TO treatment. After the air PIII treatment Ti and Al were present in fully oxidized (TiO2 and Al2O3) states, and neither nitrogen nor vanadium could be detected in the topmost layer. XRD showed the formation of rutile and substoichiometric TiO2-x phases on the PIII-treated Ti and TO-treated Ti-alloy, but no crystalline oxide phase was found on the PIII-treated Ti-alloy. The surface hardness and the scratch resistance of the samples increased significantly after PIII treatment. The surface hardening and the improved scratch resistance of the oxidized Ti-alloy samples can be explained mainly by the surface segregation of Al and the formation of a layer containing oxidized Ti and Al.",
keywords = "Nanomechanical properties, Ti, Ti6Al4V, XPS, XRD",
author = "A. T{\'o}th and M. Mohai and T. Ujv{\'a}ri and T. Bell and H. Dong and I. Bert{\'o}ti",
year = "2004",
month = "8",
day = "2",
doi = "10.1016/j.surfcoat.2004.04.031",
language = "English",
volume = "186",
pages = "248--254",
journal = "Surface and Coatings Technology",
issn = "0257-8972",
publisher = "Elsevier",
number = "1-2 SPEC. ISS.",

}

TY - JOUR

T1 - Surface chemical and nanomechanical aspects of air PIII-treated Ti and Ti-alloy

AU - Tóth, A.

AU - Mohai, M.

AU - Ujvári, T.

AU - Bell, T.

AU - Dong, H.

AU - Bertóti, I.

PY - 2004/8/2

Y1 - 2004/8/2

N2 - Plasma immersion ion implantation (PIII) of Ti and Ti6Al4V alloy in dry air plasma has been performed with 25 kV negative pulses up to 1.9×1018 cm-2 doses. For comparison, prolonged (50-100 h), high-temperature (600-650 °C) heat treatment of a similar Ti-alloy in air (TO treatment) was also performed. The changes in chemical composition, structure and hardness of the modified surfaces were studied by XPS, X-ray diffraction (XRD) analysis and nanoindentation measurements. According to XPS, surface oxidation and strong surface enrichment of Al occurred on the Ti-alloys after both the "non-equilibrium" PIII treatment and the "equilibrium" TO treatment. After the air PIII treatment Ti and Al were present in fully oxidized (TiO2 and Al2O3) states, and neither nitrogen nor vanadium could be detected in the topmost layer. XRD showed the formation of rutile and substoichiometric TiO2-x phases on the PIII-treated Ti and TO-treated Ti-alloy, but no crystalline oxide phase was found on the PIII-treated Ti-alloy. The surface hardness and the scratch resistance of the samples increased significantly after PIII treatment. The surface hardening and the improved scratch resistance of the oxidized Ti-alloy samples can be explained mainly by the surface segregation of Al and the formation of a layer containing oxidized Ti and Al.

AB - Plasma immersion ion implantation (PIII) of Ti and Ti6Al4V alloy in dry air plasma has been performed with 25 kV negative pulses up to 1.9×1018 cm-2 doses. For comparison, prolonged (50-100 h), high-temperature (600-650 °C) heat treatment of a similar Ti-alloy in air (TO treatment) was also performed. The changes in chemical composition, structure and hardness of the modified surfaces were studied by XPS, X-ray diffraction (XRD) analysis and nanoindentation measurements. According to XPS, surface oxidation and strong surface enrichment of Al occurred on the Ti-alloys after both the "non-equilibrium" PIII treatment and the "equilibrium" TO treatment. After the air PIII treatment Ti and Al were present in fully oxidized (TiO2 and Al2O3) states, and neither nitrogen nor vanadium could be detected in the topmost layer. XRD showed the formation of rutile and substoichiometric TiO2-x phases on the PIII-treated Ti and TO-treated Ti-alloy, but no crystalline oxide phase was found on the PIII-treated Ti-alloy. The surface hardness and the scratch resistance of the samples increased significantly after PIII treatment. The surface hardening and the improved scratch resistance of the oxidized Ti-alloy samples can be explained mainly by the surface segregation of Al and the formation of a layer containing oxidized Ti and Al.

KW - Nanomechanical properties

KW - Ti

KW - Ti6Al4V

KW - XPS

KW - XRD

UR - http://www.scopus.com/inward/record.url?scp=17744363080&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=17744363080&partnerID=8YFLogxK

U2 - 10.1016/j.surfcoat.2004.04.031

DO - 10.1016/j.surfcoat.2004.04.031

M3 - Article

VL - 186

SP - 248

EP - 254

JO - Surface and Coatings Technology

JF - Surface and Coatings Technology

SN - 0257-8972

IS - 1-2 SPEC. ISS.

ER -