Preparation of a Hydroxyapatite/β calcium phosphate coating with high bonding strength on a titanium substrate
1
조회
0
다운로드
1
인용
0
참고문헌
키워드
초록
Hydroxyapatite/β-calcium phosphate coatings with a high bonding strength on titanium substrates were prepared by electrodeposited-hydrothermal synthesis and calcination. The phase composition, microstructure and bonding strength of the coatings were studied by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and mechanical testing. It showed that electro-deposition coating phase mainly consisted of dicalcium phosphate dehydrate and hydroxyapatite. A single hydroxyapatite phase coating was obtained after a hydrothermal treatment for four hours in a solution of ammonia with a pH value above 12. After calcination below 700 oC, the phase composition of the coating remained the single hydroxyapatite phase. Then the β calcium phosphate phase appeared when the calcination temperature was above 800 oC. The quantity of β calcium phosphate could be controlled by adjusting the calcination parameters. For the specimens not pre-treated, calcination in air was beneficial to improve the bonding strength below 700 oC. Above 800 oC, the bonding strength decreased obviously because of the appearance of a loose and thick titanium nitride and titanium dioxide transition layer. The highest bonding strength in this study was obtained on the specimens pre-treated in a sodium hydroxide solution and calcined in an argon atmosphere at 900 oC.
Abstract
Hydroxyapatite/β-calcium phosphate coatings with a high bonding strength on titanium substrates were prepared by electrodeposited-hydrothermal synthesis and calcination. The phase composition, microstructure and bonding strength of the coatings were studied by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and mechanical testing. It showed that electro-deposition coating phase mainly consisted of dicalcium phosphate dehydrate and hydroxyapatite. A single hydroxyapatite phase coating was obtained after a hydrothermal treatment for four hours in a solution of ammonia with a pH value above 12. After calcination below 700 oC, the phase composition of the coating remained the single hydroxyapatite phase. Then the β calcium phosphate phase appeared when the calcination temperature was above 800 oC. The quantity of β calcium phosphate could be controlled by adjusting the calcination parameters. For the specimens not pre-treated, calcination in air was beneficial to improve the bonding strength below 700 oC. Above 800 oC, the bonding strength decreased obviously because of the appearance of a loose and thick titanium nitride and titanium dioxide transition layer. The highest bonding strength in this study was obtained on the specimens pre-treated in a sodium hydroxide solution and calcined in an argon atmosphere at 900 oC.
참고문헌 (19)
- H. Akao, , J.Mater.Sci, 16(4), pp.809~812 (1981)
- R. Gorcia, , J. Mater. Sci.: Mater. Med, 3(3), pp.154~156 (1992)
- P. Temgralll, , J.Clin.Mater, 9(1), pp.115~134 (1992)
- N.Mitsuo, , J.Mater.Sci.Eng.A, 243, pp.231~236 (1998)
- V. Cannillo, , J.Euro.Ceram.Soc, 28(11), pp.2161~2169 (2008)
- S. Pushpakanth, , J.Mater.Chem.Phys, 107(2), pp.492~498 (2008)
- Y.C. Tsui, , J.Biomater, 19(22), pp.2015~2029 (1998)
- H. Katayama, , J.Surf.Coat.Tec, 204(1), pp.135~140 (2009)
- A. Rakngarm, , J.Mech.Be.Biome.Mater, 2(5), pp.444~453 (2009)
- M. Roy, , J.Acta Biomater, 4(5), pp.324~333 (2008)
- A. Kobayashi, , Vacuum, 83(1), pp.86~91 (2008)
- M.shirkhanzadeh, , J.Mater.Sci.Let, 10(12), pp.1415~1417 (1991)
- X. Nie, , J.Surf.Coat.Tech, 125(3), pp.407~414 (2000)
- C. Arnould, , J.Acta Electro, 53(18), pp.5632~5638 (2008)
- E.W.Pauchiu, , J.Mater.Sci.:Mater.Med, 4(2), pp.150~158 (1993)
- Z. Sam, , J.Surf.Coat.Tech, 200, pp.6350~6354 (2006)
- T. Nonami, , J.Mater.Sci.Eng, 6(4), pp.281~284 (1998)
- P.A. Ramires, , J.Biomater, 22(12), pp.1467~1474 (2001)
- A. Balamurugan, , J.Acta Electro, 54(4), pp.1192~1198 (2009)