Hydroxyapatite/cerium oxide composites: Sintering, microstructural, mechanical and invitro bioactivity properties

Süleyman Serdar PAZARLIOĞLU

doi:https://doi.org/10.7240/jeps.512240

Makale detayları

Hydroxyapatite/cerium oxide composites: Sintering, microstructural, mechanical and invitro bioactivity properties

Yazarlar:

Süleyman Serdar PAZARLIOĞLU

Yayıncı:

Marmara University

Ana Başlıklar:

Uygulamalı fizik

Dergi:

International Journal of Advances in Engineering and Pure Sciences 2019 Vol.31 Issue 4, pp.295-304

Belge Tipi:

Makale

Yayın Tarihi:

10/2019

Belge Dili:

İngilizce

Document ID (Org No.):

2000474294

Sıklık:

Üç Aylık

eISSN:

2636-8277

DOI:

https://doi.org/10.7240/jeps.512240

Özet:

 


Effect of cerium
oxide (CeO2) additive on the microstructure, mechanical and invitro
bioactivity properties of a commercially synthetic hydroxyapatite (HA) was
investigated. HA without CeO2 started to decompose at 1100 oC,
but the decomposition temperature of the CeO2 added samples
decreased up to 900 oC. Decomposition rate of the sintered samples
increased as the sintering temperature reached to 1300 oC. It was
about 5.8% for monolithic HA, and increased to 11.4% when the CeO2
additive to HA reached to 2.5 wt%. SEM images showed that an excessive grain
growth as well as microcracks occured on the surface of monolithic HA when it
was sintered at the temperatures than that of 1100 oC. The
microcracks were also observed on the surface of HA-CeO2 composites,
when they were sintered at 1300 oC. The composite of HA-0.5CeO2
sintered at 1100 oC possess the higher fracture toughness (Kıc)
(2.510 ± 0.225 MPam1/2) and the higher compressive strength (152.73
± 6.31 MPa) compared to other HA-CeO2 composites, and it's
mechanical properties are higher than that of monolithic HA at about 2-3 times.
In-vitro bioactivity test results showed that apatite layers on the surface of
the samples were in the different morphologies. 


.

 


Effect of cerium
oxide (CeO2) additive on the microstructure, mechanical and invitro
bioactivity properties of a commercially synthetic hydroxyapatite (HA) was
investigated. HA without CeO2 started to decompose at 1100 oC,
but the decomposition temperature of the CeO2 added samples
decreased up to 900 oC. Decomposition rate of the sintered samples
increased as the sintering temperature reached to 1300 oC. It was
about 5.8% for monolithic HA, and increased to 11.4% when the CeO2
additive to HA reached to 2.5 wt%. SEM images showed that an excessive grain
growth as well as microcracks occured on the surface of monolithic HA when it
was sintered at the temperatures than that of 1100 oC. The
microcracks were also observed on the surface of HA-CeO2 composites,
when they were sintered at 1300 oC. The composite of HA-0.5CeO2
sintered at 1100 oC possess the higher fracture toughness (Kıc)
(2.510 ± 0.225 MPam1/2) and the higher compressive strength (152.73
± 6.31 MPa) compared to other HA-CeO2 composites, and it's
mechanical properties are higher than that of monolithic HA at about 2-3 times.
In-vitro bioactivity test results showed that apatite layers on the surface of
the samples were in the different morphologies. 


.

Makale detayları

Hydroxyapatite/cerium oxide composites: Sintering, microstructural, mechanical and invitro bioactivity properties

Yazarlar: Süleyman Serdar PAZARLIOĞLU

Yayıncı: Marmara University

Ana Başlıklar: Uygulamalı fizik

Dergi: International Journal of Advances in Engineering and Pure Sciences 2019 Vol.31 Issue 4, pp.295-304

Belge Tipi: Makale

Yayın Tarihi: 10/2019

Belge Dili: İngilizce

Document ID (Org No.): 2000474294

Sıklık: Üç Aylık

eISSN: 2636-8277

DOI: https://doi.org/10.7240/jeps.512240

Sayı

Yazarlar:

Süleyman Serdar PAZARLIOĞLU

Yayıncı:

Marmara University

Ana Başlıklar:

Uygulamalı fizik

Dergi:

International Journal of Advances in Engineering and Pure Sciences 2019 Vol.31 Issue 4, pp.295-304

Belge Tipi:

Makale

Yayın Tarihi:

10/2019

Belge Dili:

İngilizce

Document ID (Org No.):

2000474294

Sıklık:

Üç Aylık

eISSN:

2636-8277

DOI:

https://doi.org/10.7240/jeps.512240