Boson peak, nanostructure and relaxation of glasses

被引：26

作者：

Duval, E ^{[1
]}

Mermet, A

Surovtsev, NV

Dianoux, AJ

机构：

[1] Univ Lyon 1, Lab Phys Chim Mat Lumin, CNRS, UMR 5620, F-69622 Villeurbanne, France

[2] Inst Max Von Laue Paul Langevin, F-38042 Grenoble, France

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 1998年 / 235卷

关键词：

D O I：

10.1016/S0022-3093(98)00505-5

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In previous papers the low-energy vibrational density of states (boson peak) observed in poly(methyl methacrylate) glass by inelastic neutron scattering is interpreted by the existence of more cohesive nanodomains separated by softer interfacial zones. The log-normal size distribution of nanodomains, that fits the experiment, is justified by the process leading to glass-transition. The fast relaxation in the glass observed by the quasielastic light and neutron scatterings, and the slow one revealed by the dynamic hole volume as deduced from positron annihilation lifetime spectroscopy, are closely related. A model for the interdependence of both relaxations is proposed. The consequences of the relaxational dynamics on viscosity and glass transition are discussed. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：203 / 207

页数：5

共 19 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] Relaxational and vibrational dynamics in the glass-transition range of a strong glass former B2O3 [J].

Brodin, A ;

Borjesson, L ;

Engberg, D ;

Torell, LM ;

Sokolov, AP .

PHYSICAL REVIEW B, 1996, 53 (17) :11511-11520

[3] A RELATION BETWEEN FAST AND SLOW MOTIONS IN GLASSY AND LIQUID SELENIUM [J].

BUCHENAU, U ;

ZORN, R .

EUROPHYSICS LETTERS, 1992, 18 (06) :523-528

[4] Phonons in glasses: Numerical simulations and phenomenological theory [J].

Caprion, D ;

Jund, P ;

Jullien, R .

PHYSICAL REVIEW LETTERS, 1996, 77 (04) :675-678

[5] LIQUID-GLASS TRANSITION, A FREE-VOLUME APPROACH [J].

COHEN, MH ;

GREST, GS .

PHYSICAL REVIEW B, 1979, 20 (03) :1077-1098

[6] THE SIZE OF COOPERATIVELY REARRANGING REGIONS AT THE GLASS-TRANSITION [J].

DONTH, E .

JOURNAL OF NON-CRYSTALLINE SOLIDS, 1982, 53 (03) :325-330

[7] STUDIES IN NEWTONIAN FLOW .2. THE DEPENDENCE OF THE VISCOSITY OF LIQUIDS ON FREE-SPACE [J].

DOOLITTLE, AK .

JOURNAL OF APPLIED PHYSICS, 1951, 22 (12) :1471-1475

[8] VIBRATIONAL DYNAMICS AND THE STRUCTURE OF GLASSES [J].

DUVAL, E ;

BOUKENTER, A ;

ACHIBAT, T .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1990, 2 (51) :10227-10234

[9] Quasielastic scattering and fast localized relaxation in poly(methyl methacrylate) glass [J].

Duval, E ;

Mermet, A ;

Surovtsev, N ;

Jal, JF ;

Dianoux, AJ .

PHILOSOPHICAL MAGAZINE B-PHYSICS OF CONDENSED MATTER STATISTICAL MECHANICS ELECTRONIC OPTICAL AND MAGNETIC PROPERTIES, 1998, 77 (02) :457-461

[10] VIBRATION EIGENMODES AND SIZE OF MICROCRYSTALLITES IN GLASS - OBSERVATION BY VERY-LOW-FREQUENCY RAMAN-SCATTERING [J].

DUVAL, E ;

BOUKENTER, A ;

CHAMPAGNON, B .

PHYSICAL REVIEW LETTERS, 1986, 56 (19) :2052-2055

← 1 2 →