치과 임플란트용 bioactive 세라믹 복합재료의 제조와 미세조직
Microstructure and Processing of Bioactive CeramicComposites as Dental Implants
김부섭,
소속 상세정보
김부섭 ( Kim Bu-Sob ) - 부산가톨릭대학교 치기공학과
KMID : 0362120030250010021
Abstract
The purpose of this study was to process bio-active glass ceramic composite, reinforced withsapphire fibers, by hot press. Also to study the interface of the matrix and the sapphire fiber, andthe mechanical properties.Glass raw materials melted in Pt crucible at 1300during 3.5 hours. The melt was crushed inball mill and then crushed material, ground and sieved to <40ß. Sapphire fibers cut (30) andaligned.Powder and fibers hot pressed.The micrographs show good bonding between the matrix and the fiber and no porosity in theglass matrix. This means ideal fracture phenomena. Glass is fractured before the fiber. This isindication of good fracture strength.EDXS showing aluminum rich phase and crystalline phase. Bright field image of the matrixshowing crystalline phase.Also diffraction pattern of TEM showing the crystalline phase and more than one phase.Strength of the samples was determined by 3 point bend testing. Strength of the 10vol% samplewas approximately 69MPa, while strength of the control sample is 35MPa.Conclusions through this study as follow: 1. Micrographs show no porosity in the glass matrix and the interface. 2. The interface between the fiber and the glass matrix show no gaps. 3. Fracture of the glass indicates characteristic fiber-matrix separation. 4. Presence of crystalline phase at high processing temperature. 5. Sapphire is compatible with bioactive glass.
키워드
bioactive ceramic composites;bioactive glass;sapphire fibers;hot press;SEM;TEM;mechanical testing;microstructure
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