Comparative study of the tribological and oxidative properties of AlPdMn quasicrystals and their cubic approximants

Chris Mancinelli; Jeff S. Ko; Cynthia J. Jenks; Patricia A. Thiel; Amy R. Ross; Thomas A. Lograsso; Andrew J. Gellman

Comparative study of the tribological and oxidative properties of AlPdMn quasicrystals and their cubic approximants

Chris Mancinelli, Jeff S. Ko, Cynthia J. Jenks, Patricia A. Thiel, Amy R. Ross, Thomas A. Lograsso, Andrew J. Gellman

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

12 Scopus citations

Abstract

An experimental comparison has been made between the properties of the surfaces of an Al₇₀Pd₂₁Mn₉ quasicrystal and its Al₄₈Pd₄₂Mn₁₀ approximant. The Al₇₀Pd₂₁Mn₉ sample was a single grain icosahedral quasicrystal cut to expose its five-fold symmetric (000001) surface. The approximant was polycrystalline β-phase Al₄₈Pd₄₂Mn₁₀, which has a CsCl-type cubic structure. Surfaces of both were prepared under ultra-high vacuum (UHV) conditions and then used for comparative measurements of their frictional properties and oxidation rates. Both materials are oxidized by reaction with O₂ to form a thin film of aluminum oxide that ultimately passivates their surfaces. The interesting difference between the two is that the rate of oxidation of the approximant is significantly higher than that of the quasicrystal in spite of the fact that the bulk Al concentration of the approximant is lower than that of the quasicrystal. Friction measurements were made under UHV conditions between pairs of quasicrystals and pairs of approximants whose surfaces were either clean or oxidized to varying degrees. The friction between pairs of the approximant surfaces is significantly higher than that measured between the quasicrystal surfaces under all conditions of surface oxidation.

Original language	English
Pages (from-to)	K821-K8210
Journal	Materials Research Society Symposium - Proceedings
Volume	643
State	Published - 2001
Externally published	Yes

Funding

This work was supported by the Director, Office of Energy Research, Office of Basic Energy Sciences, Material Sciences Division, of the U.S. Department of Energy under Contract No. W-405-Eng-82 and by the Air Force Office of Scientific Research for the funds used to design and develop the instrumentation under Grant No. AF-49620-98-100218.

Funders	Funder number
U.S. Department of Energy	W-405-Eng-82
Division of Ocean Sciences
Air Force Office of Scientific Research	AF-49620-98-100218
Basic Energy Sciences
Office of Energy Research and Development

Cite this

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title = "Comparative study of the tribological and oxidative properties of AlPdMn quasicrystals and their cubic approximants",

abstract = "An experimental comparison has been made between the properties of the surfaces of an Al70Pd21Mn9 quasicrystal and its Al48Pd42Mn10 approximant. The Al70Pd21Mn9 sample was a single grain icosahedral quasicrystal cut to expose its five-fold symmetric (000001) surface. The approximant was polycrystalline β-phase Al48Pd42Mn10, which has a CsCl-type cubic structure. Surfaces of both were prepared under ultra-high vacuum (UHV) conditions and then used for comparative measurements of their frictional properties and oxidation rates. Both materials are oxidized by reaction with O2 to form a thin film of aluminum oxide that ultimately passivates their surfaces. The interesting difference between the two is that the rate of oxidation of the approximant is significantly higher than that of the quasicrystal in spite of the fact that the bulk Al concentration of the approximant is lower than that of the quasicrystal. Friction measurements were made under UHV conditions between pairs of quasicrystals and pairs of approximants whose surfaces were either clean or oxidized to varying degrees. The friction between pairs of the approximant surfaces is significantly higher than that measured between the quasicrystal surfaces under all conditions of surface oxidation.",

author = "Chris Mancinelli and Ko, {Jeff S.} and Jenks, {Cynthia J.} and Thiel, {Patricia A.} and Ross, {Amy R.} and Lograsso, {Thomas A.} and Gellman, {Andrew J.}",

year = "2001",

language = "English",

volume = "643",

pages = "K821--K8210",

journal = "Materials Research Society Symposium - Proceedings",

issn = "0272-9172",

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TY - JOUR

T1 - Comparative study of the tribological and oxidative properties of AlPdMn quasicrystals and their cubic approximants

AU - Mancinelli, Chris

AU - Ko, Jeff S.

AU - Jenks, Cynthia J.

AU - Thiel, Patricia A.

AU - Ross, Amy R.

AU - Lograsso, Thomas A.

AU - Gellman, Andrew J.

PY - 2001

Y1 - 2001

N2 - An experimental comparison has been made between the properties of the surfaces of an Al70Pd21Mn9 quasicrystal and its Al48Pd42Mn10 approximant. The Al70Pd21Mn9 sample was a single grain icosahedral quasicrystal cut to expose its five-fold symmetric (000001) surface. The approximant was polycrystalline β-phase Al48Pd42Mn10, which has a CsCl-type cubic structure. Surfaces of both were prepared under ultra-high vacuum (UHV) conditions and then used for comparative measurements of their frictional properties and oxidation rates. Both materials are oxidized by reaction with O2 to form a thin film of aluminum oxide that ultimately passivates their surfaces. The interesting difference between the two is that the rate of oxidation of the approximant is significantly higher than that of the quasicrystal in spite of the fact that the bulk Al concentration of the approximant is lower than that of the quasicrystal. Friction measurements were made under UHV conditions between pairs of quasicrystals and pairs of approximants whose surfaces were either clean or oxidized to varying degrees. The friction between pairs of the approximant surfaces is significantly higher than that measured between the quasicrystal surfaces under all conditions of surface oxidation.

AB - An experimental comparison has been made between the properties of the surfaces of an Al70Pd21Mn9 quasicrystal and its Al48Pd42Mn10 approximant. The Al70Pd21Mn9 sample was a single grain icosahedral quasicrystal cut to expose its five-fold symmetric (000001) surface. The approximant was polycrystalline β-phase Al48Pd42Mn10, which has a CsCl-type cubic structure. Surfaces of both were prepared under ultra-high vacuum (UHV) conditions and then used for comparative measurements of their frictional properties and oxidation rates. Both materials are oxidized by reaction with O2 to form a thin film of aluminum oxide that ultimately passivates their surfaces. The interesting difference between the two is that the rate of oxidation of the approximant is significantly higher than that of the quasicrystal in spite of the fact that the bulk Al concentration of the approximant is lower than that of the quasicrystal. Friction measurements were made under UHV conditions between pairs of quasicrystals and pairs of approximants whose surfaces were either clean or oxidized to varying degrees. The friction between pairs of the approximant surfaces is significantly higher than that measured between the quasicrystal surfaces under all conditions of surface oxidation.

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M3 - Article

AN - SCOPUS:0035559225

SN - 0272-9172

VL - 643

SP - K821-K8210

JO - Materials Research Society Symposium - Proceedings

JF - Materials Research Society Symposium - Proceedings

ER -

Comparative study of the tribological and oxidative properties of AlPdMn quasicrystals and their cubic approximants

Abstract

Funding

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