Structure and apatite induction of a microarc-oxidized coating on a biomedical titanium alloy

G. L. Zhao; X. Li; L. Xia; G. Wen; L. Song; X. Y. Wang; K. Wu

doi:10.1016/j.apsusc.2010.09.012

Structure and apatite induction of a microarc-oxidized coating on a biomedical titanium alloy

G. L. Zhao
, X. Li
, L. Xia
, G. Wen^*
, L. Song
, X. Y. Wang
, K. Wu

^*Corresponding author for this work

School of Materials Science and Engineering, Harbin Institute of Technology Weihai
Harbin Institute of Technology

Research output: Contribution to journal › Article › peer-review

23 Scopus citations

Abstract

An oxide coating with nanostructure was prepared by micro-arc oxidation (MAO) on a biomedical Ti-24Nb-4Zr-7.9Sn alloy. Chemical composition of the coating mainly includes O, Ti, Nb, Ca, P, Na, Zr and Sn, where the ratio of Ca/P is about 1.6. Ti, Nb, Zr and Sn participate in the oxidation to form TO ₂ , Nb ₂ O ₅ , ZrO ₂ and SnO ₂ nanocrystals, while Ca, P and Na are present in the form of amorphous phases. After alkali treatment, the surface of the MAO coating becomes rough, and Na concentration increases remarkably while P disappears basically. The alkali treated coating shows better apatite forming ability than the untreated one, as evidenced by apatite formation after SBF immersion for 7 days. The improvement of apatite forming ability of the modified coating is attributed to the formation of a sodium titanate layer and numbers of submicron-scale network flakes. The enhancement of the surface wettability of the alkali treated coating also plays an important role in promoting the apatite forming ability.

Original language	English
Pages (from-to)	1762-1768
Number of pages	7
Journal	Applied Surface Science
Volume	257
Issue number	5
DOIs	https://doi.org/10.1016/j.apsusc.2010.09.012
State	Published - 15 Dec 2010
Externally published	Yes

Keywords

Alkali-treatment
Apatite
Coating
Low-modulus titanium alloy
Micro-arc oxidation

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10.1016/j.apsusc.2010.09.012

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title = "Structure and apatite induction of a microarc-oxidized coating on a biomedical titanium alloy",

abstract = " An oxide coating with nanostructure was prepared by micro-arc oxidation (MAO) on a biomedical Ti-24Nb-4Zr-7.9Sn alloy. Chemical composition of the coating mainly includes O, Ti, Nb, Ca, P, Na, Zr and Sn, where the ratio of Ca/P is about 1.6. Ti, Nb, Zr and Sn participate in the oxidation to form TO 2 , Nb 2 O 5 , ZrO 2 and SnO 2 nanocrystals, while Ca, P and Na are present in the form of amorphous phases. After alkali treatment, the surface of the MAO coating becomes rough, and Na concentration increases remarkably while P disappears basically. The alkali treated coating shows better apatite forming ability than the untreated one, as evidenced by apatite formation after SBF immersion for 7 days. The improvement of apatite forming ability of the modified coating is attributed to the formation of a sodium titanate layer and numbers of submicron-scale network flakes. The enhancement of the surface wettability of the alkali treated coating also plays an important role in promoting the apatite forming ability.",

keywords = "Alkali-treatment, Apatite, Coating, Low-modulus titanium alloy, Micro-arc oxidation",

author = "Zhao, \{G. L.\} and X. Li and L. Xia and G. Wen and L. Song and Wang, \{X. Y.\} and K. Wu",

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doi = "10.1016/j.apsusc.2010.09.012",

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T1 - Structure and apatite induction of a microarc-oxidized coating on a biomedical titanium alloy

AU - Zhao, G. L.

AU - Li, X.

AU - Xia, L.

AU - Wen, G.

AU - Song, L.

AU - Wang, X. Y.

AU - Wu, K.

PY - 2010/12/15

Y1 - 2010/12/15

N2 - An oxide coating with nanostructure was prepared by micro-arc oxidation (MAO) on a biomedical Ti-24Nb-4Zr-7.9Sn alloy. Chemical composition of the coating mainly includes O, Ti, Nb, Ca, P, Na, Zr and Sn, where the ratio of Ca/P is about 1.6. Ti, Nb, Zr and Sn participate in the oxidation to form TO 2 , Nb 2 O 5 , ZrO 2 and SnO 2 nanocrystals, while Ca, P and Na are present in the form of amorphous phases. After alkali treatment, the surface of the MAO coating becomes rough, and Na concentration increases remarkably while P disappears basically. The alkali treated coating shows better apatite forming ability than the untreated one, as evidenced by apatite formation after SBF immersion for 7 days. The improvement of apatite forming ability of the modified coating is attributed to the formation of a sodium titanate layer and numbers of submicron-scale network flakes. The enhancement of the surface wettability of the alkali treated coating also plays an important role in promoting the apatite forming ability.

AB - An oxide coating with nanostructure was prepared by micro-arc oxidation (MAO) on a biomedical Ti-24Nb-4Zr-7.9Sn alloy. Chemical composition of the coating mainly includes O, Ti, Nb, Ca, P, Na, Zr and Sn, where the ratio of Ca/P is about 1.6. Ti, Nb, Zr and Sn participate in the oxidation to form TO 2 , Nb 2 O 5 , ZrO 2 and SnO 2 nanocrystals, while Ca, P and Na are present in the form of amorphous phases. After alkali treatment, the surface of the MAO coating becomes rough, and Na concentration increases remarkably while P disappears basically. The alkali treated coating shows better apatite forming ability than the untreated one, as evidenced by apatite formation after SBF immersion for 7 days. The improvement of apatite forming ability of the modified coating is attributed to the formation of a sodium titanate layer and numbers of submicron-scale network flakes. The enhancement of the surface wettability of the alkali treated coating also plays an important role in promoting the apatite forming ability.

KW - Alkali-treatment

KW - Apatite

KW - Coating

KW - Low-modulus titanium alloy

KW - Micro-arc oxidation

UR - https://www.scopus.com/pages/publications/78049307018

U2 - 10.1016/j.apsusc.2010.09.012

DO - 10.1016/j.apsusc.2010.09.012

M3 - 文章

AN - SCOPUS:78049307018

SN - 0169-4332

VL - 257

SP - 1762

EP - 1768

JO - Applied Surface Science

JF - Applied Surface Science

IS - 5

ER -

Structure and apatite induction of a microarc-oxidized coating on a biomedical titanium alloy

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Keywords

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