Dependency of the corrosion properties of in-situ Ti-based BMG matrix composites with the volume fraction of crystalline phase

Title
Dependency of the corrosion properties of in-situ Ti-based BMG matrix composites with the volume fraction of crystalline phase
Authors
Mukta Rani Debnath김도향에릭플러리
Keywords
composites; metallic glasses; corrosion; corrosion behavior
Issue Date
2012-03
Publisher
Intermetallics
Citation
VOL 22, 255-259
Abstract
The chemical and electrochemical corrosion properties of in-situ Ti45(Zr-Be-Cu-Ni)55-xNbx BMG matrix composites, with x = 0, 5, 10, 15 at.% and containing different volume fractions of crystalline β-(Ti,Zr,Nb) phase, have been investigated in a hydrogenated 1 M H2SO4 + 2 ppm F- electrolyte at 80 ℃. In comparison to monolithic Ti-based BMGs and Tie6Ale4V alloy, the in-situ BMG matrix composite with ~20% volume fraction of β-(Ti,Zr,Nb) phase exhibits a high corrosion resistance characterized by a low value of corrosion current density, a stable passivation behavior in both potentiodynamic and potentiostatic polarization and low weight loss during immersion tests. The enhancement of the corrosion resistance is attributed to Ti-, Zr- and Nb-rich oxide layers produced on top of both the dendrite and amorphous matrix. However, for the BMG composite with a large (~41.5%) volume fraction of Nb-rich dendrites the corrosion resistance was reduced leading to the dissolution of the amorphous matrix during immersion tests.
URI
http://pubs.kist.re.kr/handle/201004/42424
ISSN
09669795
Appears in Collections:
KIST Publication > Article
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE