The formation of α-Al2O3 scales at 1500°C

B. A. Pint; L. W. Hobbs

doi:10.1007/BF01080781

The formation of α-Al₂O₃ scales at 1500°C

B. A. Pint, L. W. Hobbs

Research output: Contribution to journal › Article › peer-review

53 Scopus citations

Abstract

The growth of Al₂O₃ scales on β-NiAl was studied at 1500°C. Oxidation rates, diffusion mechanisms, and microstructures were examined in order to achieve a complete understanding of the scale development. Variation of the Al content within the β phase field had little effect on the oxidation behavior. Ionimplanted yttrium (2×10¹⁶/cm²) was observed to provide a short-term improvement in scale adhesion but little long-term effect. When doped with Y or Zr, the first 1 μm of α-Al₂O₃ was observed to grow mainly by an inward oxygen growth mechanism. At longer times when the implant was ineffective, microstructural observations indicate a mixed-growth mode.

Original language	English
Pages (from-to)	203-233
Number of pages	31
Journal	Oxidation of Metals
Volume	41
Issue number	3-4
DOIs	https://doi.org/10.1007/BF01080781
State	Published - Apr 1994
Externally published	Yes

Keywords

growth mechanism
ion implantation
reactive element effect
α-AlO
β-NiAl

Access to Document

10.1007/BF01080781

Cite this

@article{f1925f0053324f3ea4a1bf8c09852d7e,

title = "The formation of α-Al2O3 scales at 1500°C",

abstract = "The growth of Al2O3 scales on β-NiAl was studied at 1500°C. Oxidation rates, diffusion mechanisms, and microstructures were examined in order to achieve a complete understanding of the scale development. Variation of the Al content within the β phase field had little effect on the oxidation behavior. Ionimplanted yttrium (2×1016/cm2) was observed to provide a short-term improvement in scale adhesion but little long-term effect. When doped with Y or Zr, the first 1 μm of α-Al2O3 was observed to grow mainly by an inward oxygen growth mechanism. At longer times when the implant was ineffective, microstructural observations indicate a mixed-growth mode.",

keywords = "growth mechanism, ion implantation, reactive element effect, α-AlO, β-NiAl",

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

year = "1994",

month = apr,

doi = "10.1007/BF01080781",

language = "English",

volume = "41",

pages = "203--233",

journal = "Oxidation of Metals",

issn = "0030-770X",

number = "3-4",

}

TY - JOUR

T1 - The formation of α-Al2O3 scales at 1500°C

AU - Pint, B. A.

AU - Hobbs, L. W.

PY - 1994/4

Y1 - 1994/4

N2 - The growth of Al2O3 scales on β-NiAl was studied at 1500°C. Oxidation rates, diffusion mechanisms, and microstructures were examined in order to achieve a complete understanding of the scale development. Variation of the Al content within the β phase field had little effect on the oxidation behavior. Ionimplanted yttrium (2×1016/cm2) was observed to provide a short-term improvement in scale adhesion but little long-term effect. When doped with Y or Zr, the first 1 μm of α-Al2O3 was observed to grow mainly by an inward oxygen growth mechanism. At longer times when the implant was ineffective, microstructural observations indicate a mixed-growth mode.

AB - The growth of Al2O3 scales on β-NiAl was studied at 1500°C. Oxidation rates, diffusion mechanisms, and microstructures were examined in order to achieve a complete understanding of the scale development. Variation of the Al content within the β phase field had little effect on the oxidation behavior. Ionimplanted yttrium (2×1016/cm2) was observed to provide a short-term improvement in scale adhesion but little long-term effect. When doped with Y or Zr, the first 1 μm of α-Al2O3 was observed to grow mainly by an inward oxygen growth mechanism. At longer times when the implant was ineffective, microstructural observations indicate a mixed-growth mode.

KW - growth mechanism

KW - ion implantation

KW - reactive element effect

KW - α-AlO

KW - β-NiAl

UR - http://www.scopus.com/inward/record.url?scp=0028422210&partnerID=8YFLogxK

U2 - 10.1007/BF01080781

DO - 10.1007/BF01080781

M3 - Article

AN - SCOPUS:0028422210

SN - 0030-770X

VL - 41

SP - 203

EP - 233

JO - Oxidation of Metals

JF - Oxidation of Metals

IS - 3-4

ER -

The formation of α-Al₂O₃ scales at 1500°C

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this