TY - JOUR
T1 - Porous surface structures in biomedical Co-Cr-Mo alloy prepared by local dealloying in a metallic melt
AU - Wei, Daixiu
AU - Koizumi, Yuichiro
AU - Chiba, Akihiko
N1 - Funding Information:
This work was supported by a Grant-In-Aid for Scientific Research in a Priority Area on “Creation of Life Innovation Materials for Interdisciplinary and International Researcher Development” from the Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan.
Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2018/5/15
Y1 - 2018/5/15
N2 - A novel method for preparing nano/submicron porous surfaces in biomedical Co-Cr-Mo alloy is presented, which involves local dealloying in a pure Zn melt at 500–800 °C and selective removal of Zn-rich phase formed in the dealloying products. First, reaction layers composed of Zn-rich and Zn-lean phases were formed by partially dealloying of Co from the alloy, which thickness ranges from 6 μm to 90 μm. Then, various nano/submicron porous surface layers containing a small amount of Zn were introduced by selective removing the Zn-rich phase in 1 M HCl aqueous solution. The morphologies of either reaction layers or porous structures were significantly affected by dealloying temperature. The elements of Co, Cr, Mo and Zn in porous surface layers exist predominantly in their metallic states.
AB - A novel method for preparing nano/submicron porous surfaces in biomedical Co-Cr-Mo alloy is presented, which involves local dealloying in a pure Zn melt at 500–800 °C and selective removal of Zn-rich phase formed in the dealloying products. First, reaction layers composed of Zn-rich and Zn-lean phases were formed by partially dealloying of Co from the alloy, which thickness ranges from 6 μm to 90 μm. Then, various nano/submicron porous surface layers containing a small amount of Zn were introduced by selective removing the Zn-rich phase in 1 M HCl aqueous solution. The morphologies of either reaction layers or porous structures were significantly affected by dealloying temperature. The elements of Co, Cr, Mo and Zn in porous surface layers exist predominantly in their metallic states.
KW - Biometals
KW - Dealloying
KW - Porous layer
KW - Surface modification
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U2 - 10.1016/j.matlet.2018.02.072
DO - 10.1016/j.matlet.2018.02.072
M3 - Article
AN - SCOPUS:85042734047
SN - 0167-577X
VL - 219
SP - 256
EP - 259
JO - Materials Letters
JF - Materials Letters
ER -