Structure and glass transition of amorphous Zr65Cu17.5Ni10Al7.5 studied by positron lifetime

被引：22

作者：

Dittmar, R ^{[1
]}

Wurschum, R

Ulfert, W

Kronmuller, H

Schaefer, HE

机构：

[1] Univ Stuttgart, Inst Theoret & Angew Phys, D-70550 Stuttgart, Germany

[2] Max Planck Inst Met Res, D-70506 Stuttgart, Germany

来源：

SOLID STATE COMMUNICATIONS | 1998年 / 105卷 / 04期

关键词：

disordered systems; point defects; thermodynamic properties; positron spectroscopies;

D O I：

10.1016/S0038-1098(97)10094-1

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Structural studies below and above the glass transition of bulk-amorphous Zr65Cu17.5Ni10Al7.5 were performed by means of high-temperature positron-lifetime measurements using a Co-58-positron source. A dense atomic packing is concluded from the observation of thermal detrapping of positrons from free volumes at elevated temperatures below the glass-transition temperature T-g. At T-g a structural relaxation is detected and indirect indications of the thermal formation of structural free volumes are found. (C) 1997 Elsevier Science Ltd.

引用

页码：221 / 224

页数：4

共 21 条

[1]

HE Y, 1996, J NONCRYST SOLIDS, V205, P602

[2] ZR-AL-NI AMORPHOUS-ALLOYS WITH HIGH GLASS-TRANSITION TEMPERATURE AND SIGNIFICANT SUPERCOOLED LIQUID REGION [J].

INOUE, A ;

ZHANG, T ;

MASUMOTO, T .

MATERIALS TRANSACTIONS JIM, 1990, 31 (03) :177-183

[3]

KOGEL G, 1981, METALLIC GLASSES SCI, P311

[4] POSITRON-ANNIHILATION STUDIES OF THE DYNAMICS OF THE EVOLUTION OF FREE-VOLUME IN AMORPHOUS ALLOY NI25ZR55AL20 [J].

KRISTIAKOVA, K ;

SVEC, P ;

KRISTIAK, J ;

SAUSA, O ;

DUHAJ, P .

JOURNAL OF NON-CRYSTALLINE SOLIDS, 1995, 193 :277-281

[5]

MEHRER H, 1997, DEFECT DIFF FOR, V143

[6] Harmonic behavior of metallic glasses up to the metastable melt [J].

Meyer, A ;

Wuttke, J ;

Petry, W ;

Peker, A ;

Bormann, R ;

Coddens, G ;

Kranich, L ;

Randl, OG ;

Schober, H .

PHYSICAL REVIEW B, 1996, 53 (18) :12107-12111

[7] Diffusion in quasicrystal and amorphous alloy with wide supercooled liquid phase [J].

Nakajima, H ;

Sprengel, W ;

Nonaka, K .

DEFECT AND DIFFUSION FORUM, 1997, 143 :803-814

[8] A HIGHLY PROCESSABLE METALLIC-GLASS - ZR41.2TI13.8CU12.5NI10.0BE22.5 [J].

PEKER, A ;

JOHNSON, WL .

APPLIED PHYSICS LETTERS, 1993, 63 (17) :2342-2344

[9] THERMAL-EQUILIBRIUM VACANCIES IN PLATINUM STUDIED BY POSITRON-ANNIHILATION [J].

SCHAEFER, HE ;

BANHART, F .

PHYSICA STATUS SOLIDI A-APPLIED RESEARCH, 1987, 104 (01) :263-272

[10] ELEMENTAL MELTS STUDIED BY POSITRON LIFETIME AND DOPPLER BROADENING MEASUREMENTS [J].

SCHAEFER, HE ;

ECKERT, W ;

BRIGGMANN, J ;

BAUER, W .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1989, 1 :SA97-SA106

← 1 2 3 →