摘要纯钛作为生物医用金属材料，具有良好的化学稳定性、耐腐蚀性和生物相容性，但作为牙齿和骨骼的替代材料，其硬度和耐磨性不佳，可通过对纯钛进行氮化处理得到氮化钛（TiN）涂层提高表面硬度。TiN具有高熔点、高硬度、高温化学稳定性及优良的导热性能、导电性能、光学性能，因此，常被用于耐高温、耐磨损、低辐射玻璃涂层及医学领域，又因其类金的颜色，常用作涂装表壳。但TiN的骨传导性和生物相容性一般，所以本研究将在保证其硬度、耐磨性的条件下对其处理以改善其生物性能。86714

本研究采用设备与工艺简单、可操作性强的水热处理和臭氧处理作为处理手段对TiN进行改性处理。首先以气体氮化法制备的TiN陶瓷膜为空白对照组，然后通过对试样进行不同温度的水热处理和臭氧处理来探究氧化处理对TiN表面性能的影响。研究水热处理温度对TiN陶瓷膜表面形貌、元素、化学成分、硬度等性能的影响；比较100ºC水热处理和臭氧处理对TiN陶瓷膜的各种性能影响。经过研究，可得到以下结论：100ºC以下的水热处理，TiN硬度不受影响，而在120ºC以上硬度明显下降，润湿性能随温度升高不断改善。臭氧处理24小时不影响其硬度，但表面氧化程度极大提高，润湿性能也明显改善，应该具有极佳的骨传导性。由此我们可以看出经过臭氧处理的TiN更适用于牙齿和骨骼的替代材料的表面涂层。

毕业论文关键词：TiN陶瓷层；水热处理；臭氧处理；部分氧化

Abstract Pure titanium is a kind of widely used biomedical metal material as it has good chemical stability, corrosion resistance and biocompatibility。 However, its hardness and wear resistance are poor for teeth and bone’s substitutes。 To improve its hardness titanium nitride (TiN) on pure titanium can be fabricated by nitriding treatment。 TiN has a high melting point, high hardness, high temperature thermal conductivity, chemical stability。 It also has good electrical conductivity and optical properties。 Therefore, it is often used as high temperature resistant, abrasion resistant, low radiation glass coating。 But the bone conductivity and biocompatibility of TiN is modest, we need to improve its biological performance, at the same time preserve its hardness and wear resistance。 

This study employed simple and feasible hydrothermal and ozone (O3) treatment to modify the TiN film。 Hydrothermal treatment of different temperatures and ozone treatments were carried out for the samples to explore the effects of oxidation treatment on the surface properties of TiN。 The effects of temperature on the surface morphology, element, hardness and other properties of TiN ceramic membrane were explored。 Compared with 100°C hydrothermal treatment, the effects of ozone treatment on the various properties of TiN ceramic membrane were also studied。 Results showed that, when hydrothermal treatment was conducted below 100 degrees, the hardness of TiN did not change。 While when the temperature was higher than 120°C, the hardness decreased obviously。 The wettability was also improved。 24 hours ozone treatment does not affect hardness of TiN, but the degree of surface oxidation was greatly improved compared with hydrothermal treatment。 Wettability was also significantly improved。 It is supposed to present excellent bone conductivity。 As a summary, it is promising that the TiN treated by ozone is more suitable for coatings of dental and bone substitute materials。

Keywords: TiN ceramic layer; hydrothermal treatment; ozone treatment; partial oxidation

目  录

第一章 绪论 1

1。1 生物材料 1

1。2 生物医用金属材料