【作者】 孟凡斌；

【导师】 崔春翔；

【作者基本信息】 河北工业大学 ， 材料学， 2000， 硕士

【摘要】 本文通过在海绵钛中加入对人体无害的微量元素Al、Sn、Zr、B，利用非自耗真空电弧炉制备出生物医学复合材料基体材料，并对此种基体材料的应力、织构、硬度、密度、点阵畸变等进行了分析，同时对合金元素的加入对材料组织的影响进行了分析。在成功制备了无毒、高强度、低密度生物医学复合材料基体材料后，利用X射线衍射仪的高温室，在基体材料的表面制备一层蜂窝状的K₂Ti₂O₆层，从而改善材料的生物相容性。根据试验结果得出以下结论：1．利用海绵Ti与B粉之间的高温放热反应，在非自耗电弧炉中高温熔炼可 以制备出原位生成TiB颗粒增强的钛基复合材料；2．在钛合金中加入Zr、Sn、Al、B等微量元素，起到明显的固溶强化、细 晶强化以及颗粒增强的作用；3．铸态下试样由于在凝固时各部分冷却速度不同，材料具有一定宏观应力， 经450℃退火后，宏观应力大幅度降低；4．由于应力的存在、增强相的产生及固溶元素的加入，发生点阵畸变；5．铸态试样在凝固结晶时，出现定向形核和定向长大，长大的晶粒存在以（001） 面平行于试样表面的择尤取向；6．试样经30％变形后出现（100）和（001）织构；7．经TiO₂与K₂CO₃反应，在钛基复合材料表面生成了K₂Ti₂O₆层，并且形 成O、K扩散层，从而制备出生物医学复合材料。更多还原

【Abstract】 In this paper, the base material of biofunctionability medical composites have been fabricated by non-consumable arc-melting technology, adding the no harm lrace elements Al, Sn, Zr and B into the titanium. The stress, texture, harness, density, lattice distortion and the effect of trace element was studied. Then honeycomb K2Ti206 was formed by an in situ reaction in high temperature camera and the forming process and bonding was studied. The results are as follows: 1. Utilizing the self-propagation high-temperature synthesis reaction between titanium and boron, in situ TiB reinforced titanium matrix composites have been produced by non- consumable arc-melting technology; 2. The composites have high strength for significant solution-strengthening, fine-grain- strengthening and in situ 憆iB particle reinforced effects by adding elements Al, Sn, Zr and B into the titanium. 3. The as-cast composites have a certain macro stress for the varied cooling rate in different part of the composites. The macro stress decrease significantly by annealing treatment at 450CC. 4. Lattice distortion in composites appears due to the stress, in situ reinforced particle and the adding of solution elements. 5. The orientation distribution of ciystal (001) plane paralleling to sample surface appears due to directional solidification and oriented growth during the solidification of composites. 6. (100) and (001) texture form after deformation of samples. 7. By the reaction between 1102 and K2C03, K21i206 layer and 0, K dispersion layer generate on the surface of composites. Therefore the biofunctionability medical composites has been made.更多还原