Hydroxyapatite (HA)-coated Ti6Al4V has recently been used as a bone substitute in orthopaedic and dental applications because of its favourable bioactivity and mechanical properties. Studies in the literature have shown that the bioactivity of calcium phosphate bioactive glass (BG) is higher than that of HA. In an attempt to increase the bioactivity of Ha-coated Ti6Al4V and enhance the bonding strength between coating and substrate, in the present study, HA/BG composites are applied onto Ti6Al4V using a plasma spraying technique. Microstructure and phase changes of the composite coating after plasma spraying are studied. The coating-substrate bonding strength is evaluated using an Instron, following the ASTM C633 method. Results indicate that the average bonding strengths of BG, HA/BG and HA coatings are 33.0±4.3, 39.1±5.0, and 52.0±11.7 MPa, respectively. Open pores with sizes up to 50 μm are found in both BG and HA/BG coatings, which are probably advantageous in including mechanical interlocking with the surrounding bone structure, once implanted. These HA/BG composites could provide a coating system with sufficient bonding strength, higher bioactivity, and a significant reduction in cost in raw materials. The future of this HA/BG composite coating system seems pretty bright.
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L. L. HENCH, R. J. SPLINTER, W. C. ALLEN and T. K. Greelee, J. Biomed. Mater. Res. Symp. 2 (1971) 117.
T. KOKUBO, S. ITO, S. SAKKA and T. YAMAMURO, J. Mater. Sci. 20 (1985) 2001.
T. NAKAMURA, T. YAMAMURO, S. HIGASHI, T. KUKOBO and A. ITO, J. Biomed. Mater. Res. 19 (1985) 685.
R. G. T. GEESINK and K.DE GROOT, Clin. Orthop. Relat. Res. 225 (1987) 147.
N. PASSUTI, G. DACULSI, J. M. ROGEZ, S. MARTIN and J. V. BAINVEL, Clin. Orthop. Relat. Res. 248 (1989) 69.
W. R. LACEFIELD, Ann. NY Acad. Sci. 523 (1988) 72.
C. S. KIM and P. DUCHEYNE, Biomaterials 12 (1991) 461.
M. YOSHINARI, K. OZEKI and T. SUMII, Bull. Tokyo Dent. Coll. 32 (1991) 147.
E. DORRE, Biomed. Tech. 34 (1989) 46.
K.DE GROOT, R. G. T. GEESINK, C. P. A. T. KLEIN and P. SEREKIAN, J. Biomed. Mater. Res. 21 (1987) 1357.
R. G. T. GEESINK, Clin. Orthop. Relat. Res. 261 (1990) 39.
J. A. D'ANTONIO, W. N. CAPELLO, O. D. CROTHERS, W. L. JAFFE and M. T. MANLEY, J. Bone Joint Surg. 74 (1992) 955.
S. D. COOK, J. ENIS, D. ARMSTRONG and E. LISECKI, Dent. Clin. North Amer. 36 (1992) 247.
J. N. KENT, M. S. BLOCK, I. M. FINGER, L. GUERRA, H. LARSEN and D. J. MISIEK, J. Amer. Dent. Assoc. 121 (1990) 138.
T. S. GOLEC and J. T. KRAUSER, Dent. Clin. North Amer. 36 (1992) 39.
S. MARUNO, K. HAYASHI, Y. SUMI, Y. F. WANG and H. IWATA, in “CRC handbook of bioactive ceramics”, vol. II, edited by T. Yamamuro, L. L. Hench and J. Wilson (CRC Press, Boca Raton, 1991) p. 187–193.
S. D. COOK, K. A. THOMAS and J. F. KAY, Clin. Orthop. 265 (1991) 280.
H. W. DENISSEN, W. KALK, H. M.DE NIEUPORT. J. C. MALTHA, and A.VAN DE HOOFF, Int. J. Prosth. 3 (1990) 53.
T. W. BAUER, R. C. GEESINK, R. ZIMMERMAN and J. T. MCMAHON, J. Bone Joint Surg. 73 (1991) 1439.
J. LI, S. FORBERG and L. HERMANSSON, Biomaterials 12 (1991) 438.
L. L. HENCH, “Bioceramics: material characteristics versus in vivo behavior”, edited by P. Ducheyne and J. E. Lemons (New York: New York Academy of Science, 1988) p. 54–71.
Annual book of ASTM standards, Vol. 15.02 (1984) 337.
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Chern Lin, J.H., Liu, M.L. & Ju, C.P. Structure and properties of hydroxyapatite-bioactive glass composites plasma sprayed on Ti6Al4V. J Mater Sci: Mater Med 5, 279–283 (1994). https://doi.org/10.1007/BF00122397
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DOI: https://doi.org/10.1007/BF00122397