Biomedical Engineering Reference
In-Depth Information
(a)
(b)
Figure 3.5. (a) Low magnifi cation bright fi eld TEM image of HAp-10 wt% mullite, sintered
at 1350 °C, showing typical mullite needle along with HAp phase. (b) Higher magnifi cation
image, showing the presence of sintered product at the mullite-HAp interface 35 .
Figure 3.6. X-ray diffraction pattern of (a) ball milled powder of HAp-30 wt% mullite com-
posite mixture, (b) HAp-30 wt% mullite composite (sintered at 1350 °C for 2 hrs in air) and
(c) HAp-10 wt% mullite composite (sintered at 1350 °C for 2 hrs in air) 35 .
Ti/HAp FGM could attain the effi cient biocompatibility for implant. The study
demonstrated that the tissue reaction changes gradiently in response to the gradi-
ent composition or structure of materials. This study thus implies the possibility to
control the tissue response by functionally graded structure of biomaterials.
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