In:
Microscopy and Microanalysis, Oxford University Press (OUP), Vol. 19, No. S5 ( 2013-08), p. 210-214
Abstract:
The in vitro corrosion mechanism of the biodegradable cast Mg–10% Ca binary alloy in Hanks' solution was evaluated through transmission electron microscopy observations. The corrosion behavior depends strongly on the microstructural peculiarity of Mg 2 Ca phase surrounding the island-like primary Mg phase and the fast corrosion induced by the interdiffusion of O and Ca via the Mg 2 Ca phase of lamellar structure. At the corrosion front, we found that a nanosized crack-like pathway was formed along the interface between the Mg 2 Ca phase and the primary Mg phase. Through the crack-like pathway, O and Ca are atomically exchanged each other and then the corroded Mg 2 Ca phase was transformed to Mg oxides. The in vitro corrosion by the exchange of Ca and O at the nanosized pathway led to the rapid bulk corrosion in the Mg–Ca alloys.
Type of Medium:
Online Resource
ISSN:
1431-9276
,
1435-8115
DOI:
10.1017/S1431927613012683
Language:
English
Publisher:
Oxford University Press (OUP)
Publication Date:
2013
detail.hit.zdb_id:
1481716-0
SSG:
11
SSG:
12