氮化钛涂层对牙科铸造合金腐蚀性能的影响  

The Effect of Titanium Nitride Coating on Corrosion Resistance of Dental Casting Alloys

作　　者：周雅彬[1] 米乃元[1] 滕伟[1] 张新春[1] 

机构地区：[1]中山大学光华口腔医学院.附属口腔医院,广东广州510055

出　　处：《中山大学学报（医学科学版）》2004年第2期174-176,共3页Journal of Sun Yat-Sen University:Medical Sciences

摘　　要：【目的】研究氮化钛涂层对牙科铸造合金腐蚀性能的影响。【方法】两种义齿常用的Ni-Cr合金、Co-Cr合金经常规包埋铸造成Ni-Cr、Co-Cr合金铸件,模拟临床打磨抛光形成20mm×20mm×1mm规格的试件。随机选择Ni-Cr、Co-Cr合金试件各6个,采用多弧离子镀法分别在其表面上沉积一层厚为2.5μm的氮化钛涂层(TiN)形成TiN/Ni-Cr、TiN/Co-Cr复合体。将Ni-Cr、Co-Cr合金、TiN/Ni-Cr、TiN/Co-Cr4组各6个样品分别置于人工唾液24h后,采用电化学方法测定每个样品在人工唾液中的腐蚀电位。【结果】Ni-Cr合金的腐蚀电位为(-0.2453±0.0067)V,涂层后为(-0.1400±0.0029)V;Co-Cr合金的腐蚀电位为(-0.1744±0.0036)V,涂层后为(-0.1333±0.0033)V。经氮化钛涂层后Ni-Cr合金、Co-Cr合金的腐蚀电位有明显升高,差异均有显著性(P<0.001)。【结论】氮化钛涂层可降低牙科铸造合金,尤其是贱金属合金的腐蚀倾向,提高其耐蚀性。To investigate the effect of titanium nitride coating on corrosion resistance of dental casting alloys. Two commonly used metal alloys, the Ni Cr alloy and the Co Cr alloy, were presented for this study. Alloys were casted by the manufacture with specimen size of 20 mm×20 mm×1 mm. All specimens were ground and polished to simulate clinical conditions. Then six specimens of each alloy were selected randomly and coated with a thickness of 2.5 μm titanium nitride coating (TiN) on the surfaces by multi arc technique. Natural corrosion potential(Ecorr) in artificial saliva with pH= 6.8 were measured by electrochemical method in six specimens of each group (Ni Cr group, Co Cr group, TiN/Ni Cr group and TiN/Co Cr group). TiN/ Ni Cr group obtained higher natural corrosion potentials [(-0.140 0±0.002 9)V]than Ni Cr group [(-0.245 3±0.006 7)V] TiN/Co Cr group obtained higher natural corrosion potentials [(-0.133 3±0.003 3) V] than Co Cr group [(-0.174 4±0.003 6)V]. The differences between them were significant (P< 0.001). [Conclusion]Titanium nitride coating can decrease corrosion tendency and improve corrosion resistance of dental casting alloys ,especially of non precious alloys.

关 键 词：氮化钛涂层 牙科合金 电化学 腐蚀 口腔修复材料 

分 类 号：R783.1[医药卫生—口腔医学]