Influence of Cr alloying on the microstructure of thermally sprayed quasicrystalline Al-Cu-Fe coatings

Elina Huttunen-Saarivirta (Corresponding Author), Erja Turunen, Marke Kallio

Research output: Contribution to journalArticleScientificpeer-review

15 Citations (Scopus)

Abstract

The present work reports the structural development of Al–Cu–Fe and Al–Cu–Fe–Cr coatings deposited by the high velocity oxy-fuel thermal spraying process and the influence of Cr alloying on the phase selection of Al–Cu–Fe coatings at various deposition temperatures. The porosity levels of the Al–Cu–Fe and Al–Cu–Fe–Cr coatings of the study are demonstrated to be lower than those reported for corresponding plasma-sprayed coatings. The results show that high velocity oxy-fuel spraying technique produces Al–Cu–Fe coatings that are phase structurally similar to plasma-sprayed Al–Cu–Fe coatings reported in literature. Al–Cu–Fe coatings are composed of a crystalline β-AlFe phase and a quasicrystalline i-Al65Cu20Fe15 phase as well as an oxidised form of either or both of these phases. Addition of Cr to Al–Cu–Fe alloys introduces coatings that are made up of the crystalline θ-Al2Cu phase and two quasicrystalline phases, the i1-Al80Cr13.5Fe6.5 and i2-Al13Cr3Cu4 phases. The formation of these icosahedral phases in Al–Cu–Fe–Cr alloys has not been reported before, although the occurrence of quasicrystal approximants with compositions close to those of the i1-Al80Cr13.5Fe6.5 and i2-Al13Cr3Cu4 phases has been demonstrated. On the basis of our results we propose that the icosahedral phase structure is greatly stabilised by the Cr addition to Al–Cu–Fe alloys.
Original languageEnglish
Pages (from-to)879-891
JournalIntermetallics
Volume11
Issue number9
DOIs
Publication statusPublished - 2003
MoE publication typeA1 Journal article-refereed

Fingerprint

Alloying
Coatings
Microstructure
Sprayed coatings
Crystalline materials
Plasmas
Thermal spraying
Quasicrystals
Spraying
Phase structure
Porosity
Chemical analysis
Temperature

Keywords

  • transition metal alloys
  • quasicrystals
  • sprayed coatings
  • spraying
  • coating materials
  • coating processes
  • tem
  • sem
  • aluminium
  • cobalt
  • iron
  • chromium

Cite this

Huttunen-Saarivirta, Elina ; Turunen, Erja ; Kallio, Marke. / Influence of Cr alloying on the microstructure of thermally sprayed quasicrystalline Al-Cu-Fe coatings. In: Intermetallics. 2003 ; Vol. 11, No. 9. pp. 879-891.
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title = "Influence of Cr alloying on the microstructure of thermally sprayed quasicrystalline Al-Cu-Fe coatings",
abstract = "The present work reports the structural development of Al–Cu–Fe and Al–Cu–Fe–Cr coatings deposited by the high velocity oxy-fuel thermal spraying process and the influence of Cr alloying on the phase selection of Al–Cu–Fe coatings at various deposition temperatures. The porosity levels of the Al–Cu–Fe and Al–Cu–Fe–Cr coatings of the study are demonstrated to be lower than those reported for corresponding plasma-sprayed coatings. The results show that high velocity oxy-fuel spraying technique produces Al–Cu–Fe coatings that are phase structurally similar to plasma-sprayed Al–Cu–Fe coatings reported in literature. Al–Cu–Fe coatings are composed of a crystalline β-AlFe phase and a quasicrystalline i-Al65Cu20Fe15 phase as well as an oxidised form of either or both of these phases. Addition of Cr to Al–Cu–Fe alloys introduces coatings that are made up of the crystalline θ-Al2Cu phase and two quasicrystalline phases, the i1-Al80Cr13.5Fe6.5 and i2-Al13Cr3Cu4 phases. The formation of these icosahedral phases in Al–Cu–Fe–Cr alloys has not been reported before, although the occurrence of quasicrystal approximants with compositions close to those of the i1-Al80Cr13.5Fe6.5 and i2-Al13Cr3Cu4 phases has been demonstrated. On the basis of our results we propose that the icosahedral phase structure is greatly stabilised by the Cr addition to Al–Cu–Fe alloys.",
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author = "Elina Huttunen-Saarivirta and Erja Turunen and Marke Kallio",
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Influence of Cr alloying on the microstructure of thermally sprayed quasicrystalline Al-Cu-Fe coatings. / Huttunen-Saarivirta, Elina (Corresponding Author); Turunen, Erja; Kallio, Marke.

In: Intermetallics, Vol. 11, No. 9, 2003, p. 879-891.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Influence of Cr alloying on the microstructure of thermally sprayed quasicrystalline Al-Cu-Fe coatings

AU - Huttunen-Saarivirta, Elina

AU - Turunen, Erja

AU - Kallio, Marke

PY - 2003

Y1 - 2003

N2 - The present work reports the structural development of Al–Cu–Fe and Al–Cu–Fe–Cr coatings deposited by the high velocity oxy-fuel thermal spraying process and the influence of Cr alloying on the phase selection of Al–Cu–Fe coatings at various deposition temperatures. The porosity levels of the Al–Cu–Fe and Al–Cu–Fe–Cr coatings of the study are demonstrated to be lower than those reported for corresponding plasma-sprayed coatings. The results show that high velocity oxy-fuel spraying technique produces Al–Cu–Fe coatings that are phase structurally similar to plasma-sprayed Al–Cu–Fe coatings reported in literature. Al–Cu–Fe coatings are composed of a crystalline β-AlFe phase and a quasicrystalline i-Al65Cu20Fe15 phase as well as an oxidised form of either or both of these phases. Addition of Cr to Al–Cu–Fe alloys introduces coatings that are made up of the crystalline θ-Al2Cu phase and two quasicrystalline phases, the i1-Al80Cr13.5Fe6.5 and i2-Al13Cr3Cu4 phases. The formation of these icosahedral phases in Al–Cu–Fe–Cr alloys has not been reported before, although the occurrence of quasicrystal approximants with compositions close to those of the i1-Al80Cr13.5Fe6.5 and i2-Al13Cr3Cu4 phases has been demonstrated. On the basis of our results we propose that the icosahedral phase structure is greatly stabilised by the Cr addition to Al–Cu–Fe alloys.

AB - The present work reports the structural development of Al–Cu–Fe and Al–Cu–Fe–Cr coatings deposited by the high velocity oxy-fuel thermal spraying process and the influence of Cr alloying on the phase selection of Al–Cu–Fe coatings at various deposition temperatures. The porosity levels of the Al–Cu–Fe and Al–Cu–Fe–Cr coatings of the study are demonstrated to be lower than those reported for corresponding plasma-sprayed coatings. The results show that high velocity oxy-fuel spraying technique produces Al–Cu–Fe coatings that are phase structurally similar to plasma-sprayed Al–Cu–Fe coatings reported in literature. Al–Cu–Fe coatings are composed of a crystalline β-AlFe phase and a quasicrystalline i-Al65Cu20Fe15 phase as well as an oxidised form of either or both of these phases. Addition of Cr to Al–Cu–Fe alloys introduces coatings that are made up of the crystalline θ-Al2Cu phase and two quasicrystalline phases, the i1-Al80Cr13.5Fe6.5 and i2-Al13Cr3Cu4 phases. The formation of these icosahedral phases in Al–Cu–Fe–Cr alloys has not been reported before, although the occurrence of quasicrystal approximants with compositions close to those of the i1-Al80Cr13.5Fe6.5 and i2-Al13Cr3Cu4 phases has been demonstrated. On the basis of our results we propose that the icosahedral phase structure is greatly stabilised by the Cr addition to Al–Cu–Fe alloys.

KW - transition metal alloys

KW - quasicrystals

KW - sprayed coatings

KW - spraying

KW - coating materials

KW - coating processes

KW - tem

KW - sem

KW - aluminium

KW - cobalt

KW - iron

KW - chromium

U2 - 10.1016/S0966-9795(03)00097-9

DO - 10.1016/S0966-9795(03)00097-9

M3 - Article

VL - 11

SP - 879

EP - 891

JO - Intermetallics

JF - Intermetallics

SN - 0966-9795

IS - 9

ER -