This study was purposed to develope a titanium alloy with low elastic modulus to be used as dental implant. The new titanium alloy was prepared as binary alloy by adding niobium (Nb) into the Ti-XNb system alloy. In designing the new titanium alloy, two physical variables bond order (Bo) and d- electron orbit energy level (Md) were varied. Mean bond order ( ) was around 2.8364~2.8742eV, and Mean d-electron orbit energy level ( ) was 2.4572~2.4757eV. The elastic modulus of the developed titanium alloy was 60.93~ 100.57GPa. In the results of X-ray diffraction analysis, ß-phase was observed in all the specimens, but α+β phase texture was also observed in Ti-7Nb and Ti-17Nb alloy. According to the results of potentiodynamic polarization experiment, Ti-7Nb alloy showed the highest corrosion potential as -209.0㎷. ß-phase and α-phase are observed from Ti-XNb alloys (X=7 and 17) however ß-phase is observed from Ti-XNb (X=27, 37, 47 and 57)alloys. TEM analysis identified additional feature for Ti-57Nb alloy was detected in addition to the ß-phase.
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Abstract 1. 서론 2. 실험방법 및 내용 2.1 합금설계 2.2 합금 제조 및 당량계산 2.3 열처리 및 가공 2.4 탄성계수 측정 2.5 X-선 회절실험 2.6 동전위 분극실험 2.7 광학 및 투과전자현미경 관찰 3. 실험결과 3.1 탄성계수 측정 3.2 X-선 회절실험 3.3 동전위 분극실험 3.4 광학 및 투과전자 현미경 관찰 4. 결론 References