Glass structure control of Zr-TM-Al (TM: Cu, Ni and Co) BGAs with small additive elements

Yoshihiko Yokoyama, Akihisa Inoue

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The degree of amorphousness of the cast glassy sample is evaluated by free volume, which can be roughly estimated by density. The glass structural difference of cast glassy samples is mainly originated to the difference of those cooling rates. In order to clarify the degree of amorphousness, we use the volume change during annealing just below glass transition temperature (Tg) in this study. Therefore the volume change has close relation with free volume. We tried to control the excess free volume in Zr-TM-Al (TM: Cu, Ni and Co) bulk glassy alloys (BGAs) using small additive element. We found the elements; Pd, Ag, Pt and Au, whose outer d-electrons are filled up, are effective to increase the volume change/free volume in Zr-Cu-Al BGAs. The relationship between the Young's modulus and volume change indicates the existence of two groups. The difference between them might be originated to the difference in glass structures.

Original languageEnglish
Title of host publicationSupplement to THERMEC 2006, 5th International Conference on PROCESSING and MANUFACTURING OF ADVANCED MATERIALS, THERMEC 2006
PublisherTrans Tech Publications Ltd
Pages1971-1976
Number of pages6
EditionPART 2
ISBN (Print)0878494286, 9780878494286
DOIs
Publication statusPublished - 2007 Jan 1
Externally publishedYes
Event5th International Conference on Processing and Manufacturing of Advanced Materials - THERMEC'2006 - Vancouver, Canada
Duration: 2006 Jul 42006 Jul 8

Publication series

NameMaterials Science Forum
NumberPART 2
Volume539-543
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752

Other

Other5th International Conference on Processing and Manufacturing of Advanced Materials - THERMEC'2006
CountryCanada
CityVancouver
Period06/7/406/7/8

Keywords

  • Bulk glassy alloy
  • Fatigue limit
  • Free volume control
  • Small additive element
  • Young's modulus
  • Zr-TM-Al (TM: Cu, Ni and Co) ternary alloys

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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