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The Effect of Yttrium Oxide Reinforcement on the Microstructural and Mechanical Properties of Biologically Derived Hydroxyapatite

100%

Bozkurt Y., Gokce H., Pazarlioglu S., Salman S.

Acta Physica Polonica A

2015

vol. 127

issue 4

1403-1406

In the present study, hydroxyapatite used as a matrix material was derived from the femur bones of Meleagris gallapova (MGHA) and then reinforced with yttriyum oxide (Y₂O₃, 5 and 10 wt.%). Then samples pelleted at 350 MPa were sintered between 900 and 1300°C. Finally, the effect of Y₂O₃ reinforcement on the microstructural and mechanical properties of MGHA was investigated. Scanning electron microscope (SEM) and X-ray diffraction (XRD) patterns were used for microstructural examinations. Density, microhardness and compressive strengths of composites were used to analyze their mechanical properties. Experimental results show that mechanical properties of composites were enhanced by increasing the temperature. The optimum results were obtained for MGHA-10% Y₂O₃ composites sintered at 1200°C.

Hydroxyapatite Lanthanum Oxide Composites

88%

Bozkurt Y., Pazarlioglu S., Gokce H., Gurler I., Salman S.

Acta Physica Polonica A

2015

vol. 127

issue 4

1407-1409

In the present study a commercially synthetic hydroxyapatite powders (CSHAp) were doped with lanthanum oxide (5 and 10 wt.% La₂O₃). The composite powders were well homogenized and pelleted in an uniaxial mould at 350 MPa. Pelleted green bodies were sintered at five different temperatures. Finally, the effect of La₂O₃ amount on the microstructural and mechanical properties of CSHA was investigated. Microstructural properties were detected by X-ray diffraction patterns (XRD) and scanning electron microscope (SEM). Mechanical properties of the sintered samples were determined by the density, hardness and compression strength measurements. Experimental results show that the mechanical properties of HA can be improved by the doping of La₂O₃

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2 Acta Physica Polonica A

2 2015

2 Bozkurt Y.

2 Gokce H.

2 Pazarlioglu S.

2 Salman S.

1 Gurler I.

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The Effect of Yttrium Oxide Reinforcement on the Microstructural and Mechanical Properties of Biologically Derived Hydroxyapatite

Hydroxyapatite Lanthanum Oxide Composites