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Detailed Program
| Paper Number : BI-P02 |
| Time Frame : 12:00~13:30 |
| Presentation Date : Thursday, 27, November |
| Session Name : Biomaterials |
| Session Chair 1# : - |
| Session Chair 2# : - |
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| Fabrication and Characteristics of Nano-Structured Hydroxyapatite Coating by Aerosol Deposition Method |
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| Bio-ceramic hydroxyapatite (HA) has a good candidate material for medical applications including dentistry and orthopedics. However, it is well-known that it is not easy to apply the HA coating prepared by conventional plasma spraying method since it has a low mechanical reliability and a weak adhesion strength. In this study, highly transparent nano-structured hydroxyapatite (HA) films were fabricated by using aerosol deposition (AD) process [1, 2] at a room temperature. The HA film deposited on a glass substrate shows highly transparent properties with more than 70% at 400 nm to 700nm wavelength (Fig. 1(a)). This value is almost similar to that of bulk HA prepared by spark plasma sintering. This transparency strongly indicate that the HA film has highly dense structures without any pores as well as nanostructured grains of less than 50nm. Also, the HA films deposited on a titanium substrate acquire a strong adhesion strength of more than 35 MPa as well as a mechanical hardness of more than 4.5 GPa. Crystal structure of pure HA retained in the layer, All the XRD peaks were in accordance with the JCPDS data of HA (JCPDS card no. 9-432). We will specially report the coating processes including a rotation speed and a nozzle angle for fabricating the dense and thick films with deep rough surfaces of network structures on the titanium implant fixture (Fig.2. (b, c)). |
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