Effect of ion-implanted elements on the θ to α phase transformation of Al2O3 scales grown on β-NiAl

B. A. Pint; A. Jain; L. W. Hobbs

Effect of ion-implanted elements on the θ to α phase transformation of Al₂O₃ scales grown on β-NiAl

B. A. Pint, A. Jain, L. W. Hobbs

Research output: Contribution to journal › Conference article › peer-review

21 Scopus citations

Abstract

During oxidation at 1000 °C in dry, flowing O₂, β-NiAl first forms an oxide scale of primarily θ-Al₂O₃. After 1-4 hr of continued exposure this metastable oxide transforms into the stable α-Al₂O₃ structure. An implant of 2×10¹⁶ Y/cm² at 70 kV was found to stabilize the first-forming θ-Al₂O₃ scale up to 100 hr at 1000 °C. β-NiAl was also implanted with Al and Cr to study the effect of the implantation damage and of another more noble element on the oxidation behavior. At 1200 °C, only a short term effect of the Y-implant was observed.

Original language	English
Pages (from-to)	1013-1018
Number of pages	6
Journal	Materials Research Society Symposium - Proceedings
Volume	288
State	Published - 1993
Externally published	Yes
Event	Proceedings of the 3rd Biennial Meeting of Chemical Perspectives of Microelectronic Materials - Boston, MA, USA Duration: Nov 30 1992 → Dec 3 1992

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@article{9f289b2c4085400a8e3e861abf3cb90f,

title = "Effect of ion-implanted elements on the θ to α phase transformation of Al2O3 scales grown on β-NiAl",

abstract = "During oxidation at 1000 °C in dry, flowing O2, β-NiAl first forms an oxide scale of primarily θ-Al2O3. After 1-4 hr of continued exposure this metastable oxide transforms into the stable α-Al2O3 structure. An implant of 2×1016 Y/cm2 at 70 kV was found to stabilize the first-forming θ-Al2O3 scale up to 100 hr at 1000 °C. β-NiAl was also implanted with Al and Cr to study the effect of the implantation damage and of another more noble element on the oxidation behavior. At 1200 °C, only a short term effect of the Y-implant was observed.",

author = "Pint, {B. A.} and A. Jain and Hobbs, {L. W.}",

year = "1993",

language = "English",

volume = "288",

pages = "1013--1018",

journal = "Materials Research Society Symposium - Proceedings",

issn = "0272-9172",

note = "Proceedings of the 3rd Biennial Meeting of Chemical Perspectives of Microelectronic Materials ; Conference date: 30-11-1992 Through 03-12-1992",

}

TY - JOUR

T1 - Effect of ion-implanted elements on the θ to α phase transformation of Al2O3 scales grown on β-NiAl

AU - Pint, B. A.

AU - Jain, A.

AU - Hobbs, L. W.

PY - 1993

Y1 - 1993

N2 - During oxidation at 1000 °C in dry, flowing O2, β-NiAl first forms an oxide scale of primarily θ-Al2O3. After 1-4 hr of continued exposure this metastable oxide transforms into the stable α-Al2O3 structure. An implant of 2×1016 Y/cm2 at 70 kV was found to stabilize the first-forming θ-Al2O3 scale up to 100 hr at 1000 °C. β-NiAl was also implanted with Al and Cr to study the effect of the implantation damage and of another more noble element on the oxidation behavior. At 1200 °C, only a short term effect of the Y-implant was observed.

AB - During oxidation at 1000 °C in dry, flowing O2, β-NiAl first forms an oxide scale of primarily θ-Al2O3. After 1-4 hr of continued exposure this metastable oxide transforms into the stable α-Al2O3 structure. An implant of 2×1016 Y/cm2 at 70 kV was found to stabilize the first-forming θ-Al2O3 scale up to 100 hr at 1000 °C. β-NiAl was also implanted with Al and Cr to study the effect of the implantation damage and of another more noble element on the oxidation behavior. At 1200 °C, only a short term effect of the Y-implant was observed.

UR - http://www.scopus.com/inward/record.url?scp=0027192431&partnerID=8YFLogxK

M3 - Conference article

AN - SCOPUS:0027192431

SN - 0272-9172

VL - 288

SP - 1013

EP - 1018

JO - Materials Research Society Symposium - Proceedings

JF - Materials Research Society Symposium - Proceedings

T2 - Proceedings of the 3rd Biennial Meeting of Chemical Perspectives of Microelectronic Materials

Y2 - 30 November 1992 through 3 December 1992

ER -

Effect of ion-implanted elements on the θ to α phase transformation of Al₂O₃ scales grown on β-NiAl

Abstract

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