| The new-style β -titanium alloy and surface modification of Ti alloy are the two hotspots of titanium system medical material research,which purpose is to satisfied with biomedical material's request for material's mechanical performance and biocompatibility.The study try to use the new-style β -titanium alloy as matrix,confined with surface modification technology,to fabricated K2TinO2N+1 of Ti matrix biomedical material.Surface morphology,phase constitution and biocompatibility of the material were analyzed and evaluated in the paper.The new-style β -titanium alloy ascertained its elements and content with the theory of alloy design is Ti-15Nb-3Fe,which is suitable for biomedical compound material's matrix as good mechanical performance and lower elastical quantum.Potassium titanate coating was in situ synthesized on the surface of titanium for modification,and It's intensity was guaranteed with coating synthesized reaction and physical table force.Ti alloys were produced by vacuum induction smelting furnace and non-consumable vacuum arc smelting furnace respectively. The structure, composition and property of Ti alloys were analysed.We analysed the contamination of Ti alloy to mend the smelting crucible and made up anti-polluted crucible.At last we found that the T1 alloy produced by vacuum induction smelting furnace couldn't been used as matrix for accessional oxygenation.The author construed the microstructure and componential analysis of the Ti alloy produced by non-consumable vacuum arc smelting furnace and calcined it to fulfil the request for dynam capability of biomedical Ti alloy.In order to get a ceramic laer with biocompatibility on the surface of Ti matrix,the processing technique of potassium titanate (K2OnTiO2) was researched. Effects of K2CO3/TiO2 ratio and reaction temperature on Purity and growth of the whisker wereanalyzed. When the KaCO3/TiO2 ratios was 1:4, The high quality and high productivity potassium titanate(k2Ti4O9) whisker was synthesized by calcination method at 1000℃ for an hour,and when the K2CO3/TiO2 ratios was 1:5.5,K2Ti6O13 was produced too.By optimized the processing technique of potassium titanate,the author in situ synthesized potassium titanate coating on the surface of titanium alloy. The surface oxidation of matrix participated in the in situ synthesis reaction based on the successful fabrication of potassium titanate. The effect of the reaction mode that solid phase forming and liquid, gas phase escaping happen synchronously on potassium titanate whisker's growth in orientation were analyzed.In addition,the study was carried out to investigate the effect of matrix surface roughness on coating attachment strength.The study was made use of simulated body fluid(SBF) cultivation to appraise the bioactivity of potassium titanate coating and analysed the surface morphology .The author analysed the mechanism of coating abducting to aggradate calcium and phosphorus,compared with coating surface performance,and potassium titanate's different crystalstructure affecting the capability of abducting to aggradate calcium and phosphorus.The author have evaluated the composite material's cell toxicity,comparing with cells adsorption and upgrowth state on the different material surface,analyzed the mechanism of cell cultivation.K2Ti4O9 and K2Ti6O13 coating surface are both absorbed and developed with cells,not represents any cell toxicity.
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