摘要
目的:通过测试选择性激光熔融(selective laser melting,SLM)技术制作的牙科钴铬(Co-Cr)合金的部分机械性能、表面显微结构、瓷熔附后的界面情况,以期为该技术的应用提供基础资料。方法:使用SLM技术制作牙科钴铬合金样品,用扫描电镜观察样品的表面形貌和显微结构、测试样品的密度和硬度;将样品经过除气-预氧化处理,用扫描电镜观察样品表面氧化膜的形貌和显微结构;将经过除气-预氧化处理的样品进行瓷熔附,用扫描电镜观察样品金-瓷界面的显微结构。结果:SLM制作的钴铬合金的硬度明显高于铸造钴铬合金;经过除气-预氧化处理后的氧化膜细密均匀;两种方法制作的合金在瓷熔附处理后的金-瓷界面均没有发现明显裂纹。结论:SLM技术比传统铸造技术具有一定的优越性,技术细节有待深入研究。
Objective: To investigate the surface condition and ion releasing behavior of cobalt-chromium (Co- Cr) dental alloy formed by selective laser melting (SLM) technique. Methods: Before porcelain fused sintering process, the surface condition was observed using a scanning electron microscope(SEM), and then the density and hardness of the two alloys were examined. After porcelain fused firing, the interface of porcelain and alloy was observed. Results: SLM technique provide Co-Cr alloy higher hardness than traditional casting method, hwever the density of two alloys were same. After degassing-preoxidation procedure and porcelain fused firing, the interface of the two alloys with porcelain all showed excellent combination. Conclusions.. Considering the properties before and after porcelain fused sintering process, $LM technioue is suitable to form dental Co-Cr allov.
出处
《口腔医学研究》
CAS
CSCD
2012年第8期815-817,820,共4页
Journal of Oral Science Research