Length scale effects on relaxations in metallic glasses

被引：20

作者：

Bedorf, Dennis ^{[1
]}

Samwer, Konrad ^{[1
]}

机构：

[1] Univ Gottingen, Inst Phys 1, D-37077 Gottingen, Germany

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 2010年 / 356卷 / 6-8期

关键词：

Amorphous metals; Metallic glasses; SUPERCOOLED LIQUIDS; PLASTIC-DEFORMATION; POLYMER-FILMS; TRANSITION; DYNAMICS; TEMPERATURE;

D O I：

10.1016/j.jnoncrysol.2009.11.022

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

081705 [工业催化]; 082905 [生物质能源与材料];

摘要：

The relaxation mechanism of amorphous thin films (PdCuSi) is studied by mechanical loss spectroscopy using the double-paddle-oscillator at 5.4 kHz. As in bulk material we can identify the primary (alpha) and secondary relaxation modes (beta) for thick films (200 nm). By reducing the film thickness below 30 nm the loss of the secondary relaxation is vanishing. We discuss the results by the Eshelby-stress field surrounding the string-like excitation reaching the free surface which looks like a merging of the primary relaxation and the secondary relaxation due to size effects. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：340 / 343

页数：4

共 21 条

[1]

ON TEMPERATURE DEPENDENCE OF COOPERATIVE RELAXATION PROPERTIES IN GLASS-FORMING LIQUIDS [J].

ADAM, G ;

GIBBS, JH .

JOURNAL OF CHEMICAL PHYSICS, 1965, 43 (01) :139-&

[2]

PLASTIC-DEFORMATION IN METALLIC GLASSES [J].

ARGON, AS .

ACTA METALLURGICA, 1979, 27 (01) :47-58

[3]

GLASS-TRANSITION ON LONG-TIME SCALES [J].

BRUNING, R ;

SAMWER, K .

PHYSICAL REVIEW B, 1992, 46 (18) :11318-11322

[4]

Supercooled liquids and the glass transition [J].

Debenedetti, PG ;

Stillinger, FH .

NATURE, 2001, 410 (6825) :259-267

[5]

Confinement and processing effects on glass transition temperature and physical aging in ultrathin polymer films: Novel fluorescence measurements [J].

Ellison, CJ ;

Kim, SD ;

Hall, DB ;

Torkelson, JM .

EUROPEAN PHYSICAL JOURNAL E, 2002, 8 (02) :155-166

[6]

Probing slow dynamics in supported thin polymer films [J].

Fakhraai, Z ;

Forrest, JA .

PHYSICAL REVIEW LETTERS, 2005, 95 (02)

[7]

HAASEN P, 1974, PHYS METALLURGY, pCH11

[8]

Indications for a slow β-relaxation in a fragile metallic glass [J].

Hachenberg, Joerg ;

Samwer, Konrad .

JOURNAL OF NON-CRYSTALLINE SOLIDS, 2006, 352 (42-49) :5110-5113

[9]

Merging of the α and β relaxations and aging via the Johari-Goldstein modes in rapidly quenched metallic glasses [J].

Hachenberg, Joerg ;

Bedorf, Dennis ;

Samwer, Konrad ;

Richert, Ranko ;

Kahl, Annelen ;

Demetriou, Marios D. ;

Johnson, William L. .

APPLIED PHYSICS LETTERS, 2008, 92 (13)

[10]

Anelastic to plastic transition in metallic glass-forming liquids [J].

Harmon, John S. ;

Demetriou, Marios D. ;

Johnson, William L. ;

Samwer, Konrad .

PHYSICAL REVIEW LETTERS, 2007, 99 (13)

← 1 2 3 →