Oxidation resistance of B2 rare earth-magnesium intermetallic compounds

被引：19

作者：

Stumphy, B. ^{[1
,2
]}

Mudryk, Y. ^{[2
]}

Russell, A. ^{[1
,2
]}

Herman, D. ^{[1
]}

Gschneidner, K., Jr. ^{[1
,2
]}

机构：

[1] Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USA

[2] US DOE, Ames Lab, Mat & Engn Phys Program, Ames, IA 50011 USA

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2008年 / 460卷 / 1-2期

关键词：

intermetallics; rare earth alloys and compounds; crystal structure; kinetics; microstructure;

D O I：

10.1016/j.jallcom.2007.06.067

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The oxidation behaviors of YMg and CeMg were rneasured in flowing air using the thermal gravimetric analysis technique. Negligible oxidation is observed at room temperature in both compounds. At elevated temperatures, the rare earth metals oxidize preferentially, while the underlying materials transform into Mg-rich intermetallics before the Mg oxidizes to MgO. The oxidation resistance of YMg is several orders of magnitude greater than that of CeMg. The oxidation of YMg follows parabolic kinetics with an activation energy of 104 kJ/mol while that of CeMg obeys a linear law with an activation energy of 136 kJ/mol. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：363 / 367

页数：5

共 15 条

[11] CORROSION CHARACTERISTICS OF RARE EARTH + YTTRIUM METALS [J].

LEE, L ;

GREENE, ND .

CORROSION, 1964, 20 (05) :T145-&

[12]

LORIERS J, 1949, CR HEBD ACAD SCI, V229, P547

[13]

LORIERS J, 1950, CR HEBD ACAD SCI, V231, P522

[14] RARE-EARTH METAL OXIDES .1. THE DIRECT OXIDATION OF PRASEODYMIUM AND TERBIUM SESQUIOXIDES [J].

MARSH, JK .

JOURNAL OF THE CHEMICAL SOCIETY, 1946, (JAN) :15-17

[15] The growth of protective ultra-thin alumina layers on γ-TiAl(111) intermetallic single-crystal surfaces [J].

Maurice, V ;

Despert, G ;

Zanna, S ;

Josso, P ;

Bacos, MP ;

Marcus, P .

SURFACE SCIENCE, 2005, 596 (1-3) :61-73

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