Novel machinable calcium phosphate/CaTiO3 composites

Celaletdin Ergun

doi:10.1016/j.ceramint.2010.11.025

Novel machinable calcium phosphate/CaTiO₃ composites

Celaletdin Ergun^*

^*Corresponding author for this work

Department of Mechanical Engineering

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

11 Citations (Scopus)

Abstract

Hydroxylapatite/CaTiO₃ and tricalcium phosphate/CaTiO ₃ composites were prepared by pressureless air sintering and characterized in terms of phase stability, microstructure and pole drilling for their suitability for machining. In hydroxylapatite/CaTiO₃ composites, Ti incorporation into the apatite structure caused lattice shrinkage and eventual decomposition of the hydroxylapatite associated with the formation of α-tricalcium phosphate during sintering at 1100 °C. Later, α-tricalcium phosphate disappeared at 1300 °C, possibly reacting with CaTiO₃ at the expense of both phases. On the other hand, tricalcium phosphate/CaTiO₃ composites were thermally stable up to 1100 °C insuring a weak interface between the components, which is one of the requirements for machinability in ceramic composites. Drilling tests also verified their suitability for machining.

Original language	English
Pages (from-to)	1143-1146
Number of pages	4
Journal	Ceramics International
Volume	37
Issue number	3
DOIs	https://doi.org/10.1016/j.ceramint.2010.11.025
Publication status	Published - Apr 2011

Funding

This work is partially supported by the Scientific & Technological Research Council of Turkey-BIDEB program. The author thanks to Prof. John W. Halloran (Department of Materials Science and Engineering, the University of Michigan, Ann Arbor, USA) for his valuable contributions.

Funders	Funder number
Scientific & Technological Research Council

Keywords

CaTiO
Hydroxylapatite
Machinable ceramics
Tricalcium phosphate

Access to Document

10.1016/j.ceramint.2010.11.025

Cite this

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title = "Novel machinable calcium phosphate/CaTiO3 composites",

abstract = "Hydroxylapatite/CaTiO3 and tricalcium phosphate/CaTiO 3 composites were prepared by pressureless air sintering and characterized in terms of phase stability, microstructure and pole drilling for their suitability for machining. In hydroxylapatite/CaTiO3 composites, Ti incorporation into the apatite structure caused lattice shrinkage and eventual decomposition of the hydroxylapatite associated with the formation of α-tricalcium phosphate during sintering at 1100 °C. Later, α-tricalcium phosphate disappeared at 1300 °C, possibly reacting with CaTiO3 at the expense of both phases. On the other hand, tricalcium phosphate/CaTiO3 composites were thermally stable up to 1100 °C insuring a weak interface between the components, which is one of the requirements for machinability in ceramic composites. Drilling tests also verified their suitability for machining.",

keywords = "CaTiO, Hydroxylapatite, Machinable ceramics, Tricalcium phosphate",

author = "Celaletdin Ergun",

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language = "English",

volume = "37",

pages = "1143--1146",

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AU - Ergun, Celaletdin

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AB - Hydroxylapatite/CaTiO3 and tricalcium phosphate/CaTiO 3 composites were prepared by pressureless air sintering and characterized in terms of phase stability, microstructure and pole drilling for their suitability for machining. In hydroxylapatite/CaTiO3 composites, Ti incorporation into the apatite structure caused lattice shrinkage and eventual decomposition of the hydroxylapatite associated with the formation of α-tricalcium phosphate during sintering at 1100 °C. Later, α-tricalcium phosphate disappeared at 1300 °C, possibly reacting with CaTiO3 at the expense of both phases. On the other hand, tricalcium phosphate/CaTiO3 composites were thermally stable up to 1100 °C insuring a weak interface between the components, which is one of the requirements for machinability in ceramic composites. Drilling tests also verified their suitability for machining.

KW - CaTiO

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KW - Machinable ceramics

KW - Tricalcium phosphate

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