Journal
MATERIALS TRANSACTIONS
Volume 43, Issue 3, Pages 439-442Publisher
JAPAN INST METALS
DOI: 10.2320/matertrans.43.439
Keywords
iron-chromium; deposition; surface morphology; crystallographic structure; thermal equilibrium diagram; crystal; amorphous
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The crystallographic structure and morphology of electrodeposited Fe-Cr films under different bath conditions were studied in detail by using XRD, HRTEM and SEM. The crystallographic structures of the Fe-Cr electrodeposits were also compared with the Fe-Cr thermal equilibrium diagram. The results indicated that the crystallographic structure of electrodeposited Fe-Cr alloy film gradually changed from microcrystalline to amorphous with increasing Cr content. The deposited film exists as alpha-Fe solid solution when the Cr compositions of deposited films are below 3.1 at%, it existed as a meta-stabte crystal when the Cr compositions of deposited films are from 4.5 at% to 22.4 at%, which hake not been reported up to now. The deposited films with various Cr compositions from 22.9 at% to 74.4 at% chromium exist as amorphous phase. Hence, the crystallographic structure of the clectrodeposited Fe-Cr alloy film is closely related to its thermal equilibrium diagram. but does not always agree with it.
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