| 摘要: |
| 对临床失败Ni-Cr合金烤瓷修复体分析,Ni-Cr合金与陶瓷界面平滑,无明显的反应层生成,修复体内存在裂纹和气孔。通过扫描电镜、能谱与X射线衍射仪,对Ni-Cr合金与陶瓷界面反应研究结果表明,Al2O3陶瓷表面富集的氧离子,与合金中的Ni,Cr反应,还原生成Al,并与Ni化合生成AlNi3,而Cr则被氧化后与Sn生成SnCrO的复合氧化物。在Ni-Cr合金烤瓷界面处形成一连续的反应薄层,可显著改善Ni-Cr合金与陶瓷间的界面冶金结合,减少界面缺陷,实现Ni-Cr合金与陶瓷的可靠结合。 |
| 关键词: Ni-Cr合金 烤瓷 界面 反应机理 |
| DOI： |
| 分类号: |
| 基金项目:吉林省科技发展基金资助项目(20050511) |
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| Interface reaction mechanism of porcelain fused to Ni-Cr alloy |
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YUAN Shi-dong1, QIU Xiao-ming1, ZHU Song2, SUN Da-qian1, YIN Shi-qiang1
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1.College of Materials Science and Engineering, Jilin University, Changchun 130025, China;2.Stomatological Hospital, Jilin University, Changchun 130041, China
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| Abstract: |
| Clinical defeated porcelain fused to metal(PFM) was analysed.The results indicated that the interface of porcelain fused to Ni-Cr alloy was smooth, reaction layer was not obviously formed, and there cracks and pores existed in PFM. The Ni-Cr alloy and porcelain interface reaction mechanism was studied with scanning electron microscope, energy spectra and X-ray diffraction. The results showed that AlNi3 and SnCrO compound oxide were produced, and a narrow reaction layer were examined in the interface. The metallurgical bond between Ni-Cr alloy and porcelain was effectively improved, and the interface defects was reduced, and good bonding between Ni-Cr alloy and porcelain was realized. |
| Key words: Ni-Cr alloy porcelain interface reaction mechanism |
