Detailed surface analyses and improved mechanical and tribological properties of niobium treated by high temperature nitrogen plasma based ion implantation

R. M. Oliveira, A. C. Oliveira, F. C. Carreri, G. F. Gomes, M. Ueda, M. M N F Silva, L. Pichon, A. Tóth

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Transition metal nitrides, as is the case of NbN, exhibit an attractive mixture of physical, chemical and mechanical properties and can be used to overcome a severe constraint of pure niobium, that is the high oxidation rate for temperature above 400 C. In this work nitrogen ions were implanted into niobium by means of plasma based ion implantation (PBII) and high temperature PBII (HTPBII) in order to produce NbN on the surface of the material. In the case of HTPBII the treatment was performed in the temperature of 1000 C and 1250 C. In the process, negative pulses of 10 kV/20 μs/500 Hz were applied to Nb samples for 1 h. The depth of the modified layer reached up to 4.5 μm due to the diffusion of nitrogen atoms implanted into the material. X-ray diffraction spectra showed the presence of ε-NbN, β-Nb2N and γ-Nb4N3 phases. Wear rate was reduced from 1.5 × 10-2 mm3/Nm up to 2.6 × 10-6 mm3/Nm for treated samples at high temperature in comparison with pristine samples, while friction coefficient was reduced from 0.8 to 0.25. Hardness was significantly increased. Surface topography was measured by optical profilometry. Surface roughness increases with the sample temperature but it remains lower than the one obtained by conventional PBII, very probably due to the heating method, which was performed by electron bombardment.

Original languageEnglish
Pages (from-to)382-388
Number of pages7
JournalApplied Surface Science
Volume283
DOIs
Publication statusPublished - Oct 15 2013

Fingerprint

Niobium
Nitrogen plasma
Ion implantation
Plasmas
Temperature
Nitrogen
Profilometry
Surface topography
Nitrides
Chemical properties
Transition metals
Physical properties
Surface roughness
Hardness
Wear of materials
Ions
Friction
Heating
X ray diffraction
Atoms

Keywords

  • High temperature
  • Niobium
  • Niobium nitride
  • Plasma based ion implantation
  • Tribology

ASJC Scopus subject areas

  • Surfaces, Coatings and Films

Cite this

Detailed surface analyses and improved mechanical and tribological properties of niobium treated by high temperature nitrogen plasma based ion implantation. / Oliveira, R. M.; Oliveira, A. C.; Carreri, F. C.; Gomes, G. F.; Ueda, M.; Silva, M. M N F; Pichon, L.; Tóth, A.

In: Applied Surface Science, Vol. 283, 15.10.2013, p. 382-388.

Research output: Contribution to journalArticle

Oliveira, R. M. ; Oliveira, A. C. ; Carreri, F. C. ; Gomes, G. F. ; Ueda, M. ; Silva, M. M N F ; Pichon, L. ; Tóth, A. / Detailed surface analyses and improved mechanical and tribological properties of niobium treated by high temperature nitrogen plasma based ion implantation. In: Applied Surface Science. 2013 ; Vol. 283. pp. 382-388.
@article{dcd9969d68df48539dd22fcaf26ce925,
title = "Detailed surface analyses and improved mechanical and tribological properties of niobium treated by high temperature nitrogen plasma based ion implantation",
abstract = "Transition metal nitrides, as is the case of NbN, exhibit an attractive mixture of physical, chemical and mechanical properties and can be used to overcome a severe constraint of pure niobium, that is the high oxidation rate for temperature above 400 C. In this work nitrogen ions were implanted into niobium by means of plasma based ion implantation (PBII) and high temperature PBII (HTPBII) in order to produce NbN on the surface of the material. In the case of HTPBII the treatment was performed in the temperature of 1000 C and 1250 C. In the process, negative pulses of 10 kV/20 μs/500 Hz were applied to Nb samples for 1 h. The depth of the modified layer reached up to 4.5 μm due to the diffusion of nitrogen atoms implanted into the material. X-ray diffraction spectra showed the presence of ε-NbN, β-Nb2N and γ-Nb4N3 phases. Wear rate was reduced from 1.5 × 10-2 mm3/Nm up to 2.6 × 10-6 mm3/Nm for treated samples at high temperature in comparison with pristine samples, while friction coefficient was reduced from 0.8 to 0.25. Hardness was significantly increased. Surface topography was measured by optical profilometry. Surface roughness increases with the sample temperature but it remains lower than the one obtained by conventional PBII, very probably due to the heating method, which was performed by electron bombardment.",
keywords = "High temperature, Niobium, Niobium nitride, Plasma based ion implantation, Tribology",
author = "Oliveira, {R. M.} and Oliveira, {A. C.} and Carreri, {F. C.} and Gomes, {G. F.} and M. Ueda and Silva, {M. M N F} and L. Pichon and A. T{\'o}th",
year = "2013",
month = "10",
day = "15",
doi = "10.1016/j.apsusc.2013.06.119",
language = "English",
volume = "283",
pages = "382--388",
journal = "Applied Surface Science",
issn = "0169-4332",
publisher = "Elsevier",

}

TY - JOUR

T1 - Detailed surface analyses and improved mechanical and tribological properties of niobium treated by high temperature nitrogen plasma based ion implantation

AU - Oliveira, R. M.

AU - Oliveira, A. C.

AU - Carreri, F. C.

AU - Gomes, G. F.

AU - Ueda, M.

AU - Silva, M. M N F

AU - Pichon, L.

AU - Tóth, A.

PY - 2013/10/15

Y1 - 2013/10/15

N2 - Transition metal nitrides, as is the case of NbN, exhibit an attractive mixture of physical, chemical and mechanical properties and can be used to overcome a severe constraint of pure niobium, that is the high oxidation rate for temperature above 400 C. In this work nitrogen ions were implanted into niobium by means of plasma based ion implantation (PBII) and high temperature PBII (HTPBII) in order to produce NbN on the surface of the material. In the case of HTPBII the treatment was performed in the temperature of 1000 C and 1250 C. In the process, negative pulses of 10 kV/20 μs/500 Hz were applied to Nb samples for 1 h. The depth of the modified layer reached up to 4.5 μm due to the diffusion of nitrogen atoms implanted into the material. X-ray diffraction spectra showed the presence of ε-NbN, β-Nb2N and γ-Nb4N3 phases. Wear rate was reduced from 1.5 × 10-2 mm3/Nm up to 2.6 × 10-6 mm3/Nm for treated samples at high temperature in comparison with pristine samples, while friction coefficient was reduced from 0.8 to 0.25. Hardness was significantly increased. Surface topography was measured by optical profilometry. Surface roughness increases with the sample temperature but it remains lower than the one obtained by conventional PBII, very probably due to the heating method, which was performed by electron bombardment.

AB - Transition metal nitrides, as is the case of NbN, exhibit an attractive mixture of physical, chemical and mechanical properties and can be used to overcome a severe constraint of pure niobium, that is the high oxidation rate for temperature above 400 C. In this work nitrogen ions were implanted into niobium by means of plasma based ion implantation (PBII) and high temperature PBII (HTPBII) in order to produce NbN on the surface of the material. In the case of HTPBII the treatment was performed in the temperature of 1000 C and 1250 C. In the process, negative pulses of 10 kV/20 μs/500 Hz were applied to Nb samples for 1 h. The depth of the modified layer reached up to 4.5 μm due to the diffusion of nitrogen atoms implanted into the material. X-ray diffraction spectra showed the presence of ε-NbN, β-Nb2N and γ-Nb4N3 phases. Wear rate was reduced from 1.5 × 10-2 mm3/Nm up to 2.6 × 10-6 mm3/Nm for treated samples at high temperature in comparison with pristine samples, while friction coefficient was reduced from 0.8 to 0.25. Hardness was significantly increased. Surface topography was measured by optical profilometry. Surface roughness increases with the sample temperature but it remains lower than the one obtained by conventional PBII, very probably due to the heating method, which was performed by electron bombardment.

KW - High temperature

KW - Niobium

KW - Niobium nitride

KW - Plasma based ion implantation

KW - Tribology

UR - http://www.scopus.com/inward/record.url?scp=84883161823&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84883161823&partnerID=8YFLogxK

U2 - 10.1016/j.apsusc.2013.06.119

DO - 10.1016/j.apsusc.2013.06.119

M3 - Article

VL - 283

SP - 382

EP - 388

JO - Applied Surface Science

JF - Applied Surface Science

SN - 0169-4332

ER -