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Titolo
Clarifying the effect of sintering conditions on the microstructure and mechanical properties of β-tricalcium phosphate
Autor(es)
Soggetto
Condiciones de sinterización
Propiedades mecánicas
Fosfato tricálcico
β-TCP
A. Sintering
C. Mechanical properties
Tricalcium phosphate
Clasificación UNESCO
3313 Tecnología E Ingeniería Mecánicas
2211.19 Propiedades Mecánicas
Fecha de publicación
2010
Editore
Elsevier
Citación
Perera, F. H., Martínez‐Vázquez, F. J., Miranda, P., Ortiz, Á. L., & Pajares, A. (2010). Clarifying the effect of sintering conditions on the microstructure and mechanical properties of Β-tricalcium phosphate. Ceramics International, 36(6), 1929-1935. https://doi.org/10.1016/j.ceramint.2010.03.015
Resumen
[EN]The effect of the sintering conditions (temperature and time) on the microstructure (density and grain size) and mechanical properties (hardness, elastic modulus, and strength) of β-tricalcium phosphate (β-TCP) bioceramics fabricated from Ca-deficient commercial powders is analyzed. Contrary to current general opinion, it is demonstrated that the optimal sintering temperature to maximize the mechanical performance of this β-TCP material is not necessarily below the β ↔ α transformation temperature (1125 °C). In particular, optimal performance was achieved in samples sintered at 1200 °C for 3 h, since it was not until higher temperatures or longer sintering times that microcracking develops and mechanical properties are degraded. It is argued that the residual stresses developed during this reversible transformation do not lead to microcrack propagation until sufficiently large starting flaws develop in the microstructure as a consequence of grain growth. Implications of these findings for the processing routes to improve sintering of this important bioceramic are discussed.
URI
ISSN
0272-8842
DOI
10.1016/j.ceramint.2010.03.015
Versión del editor
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