Paper Titles
Anelastic Behavior due to Interstitial Oxygen in SmBa2Cu3O7-δ
p.557
Hardness and Toughness of Aluminum Porcelains Measured by the Indentation Test
p.562
Study of Calcium Phosphate Deposition on Porous Titanium Samples
p.569
Effect of Al2O3 Addition on the Mechanical Properties of Biocompatible ZrO2-Al2O3 Composites
p.575
Phase Transition Behaviour of Tricalcium Phosphate (TCP) Doped with MgO and TiO2 as Additives
p.581
Obtention of TCP Porous Ceramic Using Albumin
p.587
Phosphoric Acid Rate Addition Effect in the Hydroxyapatite Synthesis by Neutralization Method
p.593
Biomimetic Coatings on Ti-Based Alloys Obtained by Powder Metallurgy for Biomedical Applications
p.599
Ceramic Bonding to Biocompatible Titanium Alloys Obtained by Powder Metallurgy
p.605

Phase Transition Behaviour of Tricalcium Phosphate (TCP) Doped with MgO and TiO2 as Additives

Article Preview

Abstract:

In this study, the tricalcium phosphate [β-Ca3(PO4)2] behaviour using MgO and TiO2, respectively as additives has been investigated. The introduction of these additives is to control the phase transition of TCP during thermal process. The tricalcium phosphate (β,α) phases change when the temperature of sintering increase and/or during cooling down. To investigate the phase transition we examined tricalcium phosphate powder doped using 5 mol % of MgO or TiO2. The β-TCP and additives powders were mixture with acetone and dried using rota-vapour to eliminate all the solvent at 45°C for 3 h. After this procedure the powders were uniaxially pressed at 50 MPa and sintered in air-atmosphere at 1100°C to 1200°C for 5 h. All the sintered compacts were measurements by relative density, porosity, shrinkage, shrinkage rate, and the polished and fracture surfaces were investigated using a scanning electron microscope (SEM). To verify the transition phase the differential thermal analysis (DTA) and X-ray diffraction studies were carried out. The experimental results of relative density showed 92 % (MgO) and 90 % (TiO2) at 1200°C.

You might also be interested in these eBooks
Advanced Powder Technology V View Preview

Info:

Periodical:

Materials Science Forum (Volumes 530-531)

Pages:

581-586

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.530-531.581

Citation:

Cite this paper

Online since:

November 2006

Authors:

D.M.B. Wolff, E.G. Ramalho, Wilson Acchar

Keywords:

Additive, Metal Oxide, Tricalcium Phosphate

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

© 2006 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

References

[1] S. F. Hulbert, J. C. Bokros, L. L. Hench, J. Wilson and G. Heimke. Ceramics in Clinical Applications: Past, Present and Future, Elsevier, (1987), pp.189-213.

Google Scholar

[2] K. de Groot, P. Layrolle, C. van der Valk, R.A. Dalmeijer, C.A. van Blitterswijk. Biomimetic Calcium Phosphate Coating and their Biological Performances, Bioceramic, 13, (2001) pp.391-394.

DOI: 10.4028/www.scientific.net/kem.192-195.391

Google Scholar

[3] M. Jarcho. Calcium Phosphate Ceramics as Hard Tissue Prosthetics, Clin. Orthop. Relat. Res. 157, (1981) pp.259-278.

DOI: 10.1097/00003086-198106000-00037

Google Scholar

[4] L. L. Hench, Bioceramics: From Concept to Clinic, Am. Ceram. Soc. Bull. 72, n. 4, (1993), pp.93-98.

Google Scholar

[5] P. Christel, A. Meunier, J. M. Dorlot, J. M. Crolet, J. Witvolet, L. Sedel and P. Boritin, Biomechanical Compatibility and Design of Ceramic Implants for Orthopaedic Surgery, Bioceramics: Material Characteristics versus in vivo behaviour, vol. 523. Edited by P. Ducheyne and J. Lemons. Annals of New York Academy of Science, N. York, (1988).

DOI: 10.1111/j.1749-6632.1988.tb38516.x

Google Scholar

[6] M. Jarcho, H. Bolen, M.B. Thomas, J. Bobick, J.P. Kay, and R. H. Doremus, Hydroxyapatite Synthesis and Characterization in Dense Polycrystalline Form, J. Mater. Sci., 11, (1976), p. (2027).

DOI: 10.1007/pl00020328

Google Scholar

[7] M. Jarcho, J. F. kay, K. I. Gyumaer, R. H. Doremus and H. P. Drobeck. J. Engineer. 1 (1977), p.79.

Google Scholar

[8] T. D. Driskell, C. R. Hassler and L. R. McCoy. Proceedings of 26th annual conference on Engineering in Medicine and Biology, (1973), p.199.

Google Scholar

[9] J. Ando, Phase Diagrams of Ca3(PO4)2-Mg3(PO4)2 and Ca3(PO4)2-CaNaPO4 Systems, Bull. Chem. Soc. Japan. 31, (1958), p.202.

Google Scholar

[10] R. Famery, N. Richard, P. Boch, Preparation of α and β-tricalciumphosphate Ceramics, with and without Magnesium addition, Ceram Int. 20, (1994), pp.327-336.

DOI: 10.1016/0272-8842(94)90050-7

Google Scholar

[11] M. Akao, H. Aoki, K. Kato and A. Sato, Dense Polycrystalline β-tricalcium Phosphate for Prosthetic applications, J. Mater. Sci. 17, (1982), pp.343-346.

DOI: 10.1007/bf00591468

Google Scholar

[12] W. Bonfield, Developing New Materials for Replacement Surgery, Parliamentary and Scientific Committee Lecture 21 st June, (1999), 56, n. 4.

Google Scholar

[13] K. Itatani, M. Takahashi, F. Scott Howell, M. Aizawa. Effect of Metal-oxide addition on the sintering of β-calcium Orthophosphate, J. Mater. Sci. Mater. Med., 13, (2002), pp.707-713.

Google Scholar

[14] J. C. Le Thiesse. Caractéristiques Morphologiques et Surfaciques des Matières Premières Pulvérulentes. Evaluation et application. STP Pharm. 6 (3), (1990), pp.169-180.

Google Scholar

[15] J. H. Welch, W. Gutt. High-temperature studies of the System Calcium Oxidephosphorous Pentoxide, J. Chem. Soc. P. (1961), pp.4442-4444.

DOI: 10.1039/jr9610004442

Google Scholar

[16] Ryu, Hyun-Seung., Youn, H-J., Hong, K-S., Chang, B-S., Lee, C-K., Chung, S-S., An improvement in sintering Property of β-tricalcium Phosphate by addition of Calcium Pyrophosphate, 23, (2002), 909-914.

DOI: 10.1016/s0142-9612(01)00201-0

Google Scholar