Comparative Study of the Tribological and Oxidative Properties of AlPdMn Quasicrystals and Their Cubic Approximants Lograsso, Thomas Mancinelli, Chris Ko, Jeff Jenks, Cynthia Thiel, Patricia Thiel, Patricia Ross, Amy Lograsso, Thomas Gellman, Andrew
dc.contributor.department Ames Laboratory 2018-02-13T15:18:06.000 2020-06-29T23:17:47Z 2020-06-29T23:17:47Z Mon Jan 01 00:00:00 UTC 2001 2013-09-26 2000-01-01
dc.description.abstract <p>An experimental comparison has been made between the properties of the surfaces of an Al<sub>70</sub>Pd<sub>21</sub>Mn<sub>9</sub>quasicrystal and its Al<sub>48</sub>Pd<sub>42</sub>Mn<sub>10</sub> approximant. The Al<sub>70</sub>Pd<sub>21</sub>Mn<sub>9</sub> sample was a single grain icosahedral quasicrystal cut to expose its five-fold symmetric (000001) surface. The approximant was polycrystalline β-phase Al<sub>48</sub>Pd<sub>42</sub>Mn<sub>10</sub>, 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 O<sub>2</sub> 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.</p>
dc.description.comments <p>This article is from <em>MRS Proceedings</em> 641 (2000): K8.2.1, doi:<a href="" target="_blank">10.1557/PROC-643-K8.2</a>.</p>
dc.identifier archive/
dc.identifier.articleid 1043
dc.identifier.contextkey 4632788
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath ameslab_conf/43
dc.language.iso en
dc.source.bitstream archive/|||Sat Jan 15 00:14:33 UTC 2022
dc.source.uri 10.1557/PROC-643-K8.2
dc.subject.disciplines Materials Chemistry
dc.subject.disciplines Metallurgy
dc.subject.disciplines Physical Chemistry
dc.subject.keywords Chemistry
dc.title Comparative Study of the Tribological and Oxidative Properties of AlPdMn Quasicrystals and Their Cubic Approximants
dc.type article
dc.type.genre conference
dspace.entity.type Publication
relation.isAuthorOfPublication 316ee29f-99a9-49bc-a048-0f43caf97aa5
relation.isAuthorOfPublication 5e15742e-5866-486b-999c-75a0a6b554e4
relation.isOrgUnitOfPublication 25913818-6714-4be5-89a6-f70c8facdf7e
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