Wear associated with growth defects in combined cathodic arc/unbalanced magnetron sputtered CrN/NbN superlattice coatings during erosion in alkaline slurry

H.W. Wang, M.M. Stack, S.B. Lyon, P. Hovsepian, W.D. Munz

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The erosive wear associated with growth defects was studied in deaerated 0.5 M (Na2CO3-NaHCO3) buffer solutions containing 150-200 mum alumina particles on a rotating cylinder erosion-corrosion system for PVD CrN/NbN superlattice coatings grown by the are bond sputtering (ABS) process on mild steel BS6323. Corrosion was minimised by selective control of the sample's potential, according to potentiodynamic polarisation, during the slurry erosive wear test. The morphology of the coatings, particularly of the defects, was examined in planar and cross-section views by means of scanning electron microscopy before and after the test. It is found that wear of the coating is typically preferential to the defects, progressing from the particle exterior top to the interior with erosion time, while the coating matrix (areas free of such defects) is largely intact, after 24 h prolonged exposure to erosion. (C) 2000 Elsevier Science B.V. All rights reserved.

LanguageEnglish
Pages82-90
Number of pages9
JournalSurface and Coatings Technology
Volume135
Issue number1
DOIs
Publication statusPublished - Dec 2000

Fingerprint

erosion
Erosion
arcs
Wear of materials
coatings
Coatings
Defects
defects
corrosion
Corrosion
rotating cylinders
wear tests
Aluminum Oxide
Potentiodynamic polarization
Physical vapor deposition
Carbon steel
Sputtering
Buffers
Alumina
aluminum oxides

Keywords

  • erosive wear
  • erosion
  • macroparticles
  • droplets
  • PVD
  • arc bond sputtering
  • steered arc evaporation
  • unbalanced magntron
  • thin films
  • hard coatings
  • CRN coatings
  • tin films
  • corrosion
  • deposition
  • fabrication
  • technology

Cite this

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title = "Wear associated with growth defects in combined cathodic arc/unbalanced magnetron sputtered CrN/NbN superlattice coatings during erosion in alkaline slurry",
abstract = "The erosive wear associated with growth defects was studied in deaerated 0.5 M (Na2CO3-NaHCO3) buffer solutions containing 150-200 mum alumina particles on a rotating cylinder erosion-corrosion system for PVD CrN/NbN superlattice coatings grown by the are bond sputtering (ABS) process on mild steel BS6323. Corrosion was minimised by selective control of the sample's potential, according to potentiodynamic polarisation, during the slurry erosive wear test. The morphology of the coatings, particularly of the defects, was examined in planar and cross-section views by means of scanning electron microscopy before and after the test. It is found that wear of the coating is typically preferential to the defects, progressing from the particle exterior top to the interior with erosion time, while the coating matrix (areas free of such defects) is largely intact, after 24 h prolonged exposure to erosion. (C) 2000 Elsevier Science B.V. All rights reserved.",
keywords = "erosive wear, erosion, macroparticles, droplets, PVD, arc bond sputtering, steered arc evaporation, unbalanced magntron, thin films, hard coatings, CRN coatings, tin films, corrosion, deposition, fabrication, technology",
author = "H.W. Wang and M.M. Stack and S.B. Lyon and P. Hovsepian and W.D. Munz",
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pages = "82--90",
journal = "Surface and Coatings Technology",
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Wear associated with growth defects in combined cathodic arc/unbalanced magnetron sputtered CrN/NbN superlattice coatings during erosion in alkaline slurry. / Wang, H.W.; Stack, M.M.; Lyon, S.B.; Hovsepian, P.; Munz, W.D. .

In: Surface and Coatings Technology, Vol. 135, No. 1, 12.2000, p. 82-90.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Wear associated with growth defects in combined cathodic arc/unbalanced magnetron sputtered CrN/NbN superlattice coatings during erosion in alkaline slurry

AU - Wang, H.W.

AU - Stack, M.M.

AU - Lyon, S.B.

AU - Hovsepian, P.

AU - Munz, W.D.

PY - 2000/12

Y1 - 2000/12

N2 - The erosive wear associated with growth defects was studied in deaerated 0.5 M (Na2CO3-NaHCO3) buffer solutions containing 150-200 mum alumina particles on a rotating cylinder erosion-corrosion system for PVD CrN/NbN superlattice coatings grown by the are bond sputtering (ABS) process on mild steel BS6323. Corrosion was minimised by selective control of the sample's potential, according to potentiodynamic polarisation, during the slurry erosive wear test. The morphology of the coatings, particularly of the defects, was examined in planar and cross-section views by means of scanning electron microscopy before and after the test. It is found that wear of the coating is typically preferential to the defects, progressing from the particle exterior top to the interior with erosion time, while the coating matrix (areas free of such defects) is largely intact, after 24 h prolonged exposure to erosion. (C) 2000 Elsevier Science B.V. All rights reserved.

AB - The erosive wear associated with growth defects was studied in deaerated 0.5 M (Na2CO3-NaHCO3) buffer solutions containing 150-200 mum alumina particles on a rotating cylinder erosion-corrosion system for PVD CrN/NbN superlattice coatings grown by the are bond sputtering (ABS) process on mild steel BS6323. Corrosion was minimised by selective control of the sample's potential, according to potentiodynamic polarisation, during the slurry erosive wear test. The morphology of the coatings, particularly of the defects, was examined in planar and cross-section views by means of scanning electron microscopy before and after the test. It is found that wear of the coating is typically preferential to the defects, progressing from the particle exterior top to the interior with erosion time, while the coating matrix (areas free of such defects) is largely intact, after 24 h prolonged exposure to erosion. (C) 2000 Elsevier Science B.V. All rights reserved.

KW - erosive wear

KW - erosion

KW - macroparticles

KW - droplets

KW - PVD

KW - arc bond sputtering

KW - steered arc evaporation

KW - unbalanced magntron

KW - thin films

KW - hard coatings

KW - CRN coatings

KW - tin films

KW - corrosion

KW - deposition

KW - fabrication

KW - technology

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JO - Surface and Coatings Technology

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