The response of the human body to implanted biomaterials involves several complex reactions. The potential success of implantation depends on the knowledge of the interaction between the biomaterials and the corrosive environment prior to the implantation. Thus, in the present study, the in vitro corrosion behavior of biocompatible carbonitride-based coatings are discussed, based on microstructure, mechanical properties, roughness and morphology. TiCN and TiSiCN coatings were prepared by the cathodic arc deposition method and were analyzed as a possible solution for load bearing implants. It was found that both coatings have an almost stoichiometric structure, being solid solutions, which consist of a mixture of TiC and TiN, with a face-centered cubic (FCC) structure. The crystallite size decreased with the addition of Si into the TiCN matrix: the crystallite size of TiCN was 16.4 nm, while TiSiCN was 14.6 nm. The addition of Si into TiCN resulted in smaller R_a roughness values, indicating a beneficial effect of Si. All investigated surfaces have positive skewness, being adequate for the load bearing implants, which work in a corrosive environment. The hardness of the TiCN coating was 36.6 ± 2.9 GPa and was significantly increased to 47.4 ± 1 GPa when small amounts of Si were added into the TiCN layer structure. A sharp increase in resistance to plastic deformation (H³/E² ratio) from 0.63 to 1.1 was found after the addition of Si into the TiCN matrix. The most electropositive value of corrosion potential was found for the TiSiCN coating (−14 mV), as well as the smallest value of corrosion current density (49.6 nA cm²), indicating good corrosion resistance in 90% DMEM + 10% FBS, at 37 ± 0.5 °C.

中文翻译：

---

用于骨科应用的钛基碳氮化物涂层改善了CoCr合金的性能

人体对植入的生物材料的反应涉及几个复杂的反应。植入的潜在成功取决于植入之前生物材料与腐蚀性环境之间相互作用的知识。因此，在本研究中，基于微观结构，机械性能，粗糙度和形态，讨论了生物相容性碳氮化物基涂层的体外腐蚀行为。通过阴极电弧沉积方法制备了TiCN和TiSiCN涂层，并对其进行了分析，将其作为承重植入物的可能解决方案。已发现两种涂层都具有几乎化学计量的结构，是固溶体，由TiC和TiN的混合物组成，具有面心立方（FCC）结构。通过在TiCN基体中添加Si，晶粒尺寸减小：TiCN的微晶尺寸为16.4nm，而TiSiCN为14.6nm。在TiCN中添加Si导致较小的R_一粗糙度值，表示Si的有益效果。所有调查的表面都具有正偏度，足以适应在腐蚀性环境中工作的承重植入物。TiCN涂层的硬度为36.6±2.9 GPa，当在TiCN层结构中添加少量Si时，硬度显着提高至47.4±1 GPa。将Si添加到TiCN基体中后，发现其抗塑性变形（H ³ / E ²比）从0.63急剧增加到1.1。发现TiSiCN涂层的腐蚀电位最大正值（−14 mV），腐蚀电流密度的最小值（49.6 nA cm ²），表明在90％DMEM + 10％FBS下， 37±0.5°C。