ABSTRACT The present work aims to study the mechanical and tribological properties of titanium boride layer processed by a thermochemical boriding treatment, which was carried out in a salt bath consisting of 70% borax and 30% silicon carbide. The boriding temperatures were 850°C, 950°C and 1000°C with holding times of 2, 4, 6 and 8 h. The analysis by optical and scanning electron microscopy and X-ray diffraction method confirmed the formation of a single-phase layer of titanium diboride (TiB2) in the substrate surface. The thickness of the boride layer increases with time and temperature, reaching a maximum value of 50 μm. The microhardness was evaluated for the substrate and the boride layer. Additionally, nanomechanical characterization of the layer was carried out by nanoindentation tests. The influence of this treatment on the coefficient of friction and on the wear rate in a simulated medium of the body fluid was also studied.

中文翻译：

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热化学处理硼化钛涂层的机械和摩擦学行为

摘要本工作旨在研究通过热化学硼化处理处理的硼化钛层的机械和摩擦学性能，该处理在由 70% 硼砂和 30% 碳化硅组成的盐浴中进行。硼化温度为 850°C、950°C 和 1000°C，保温时间为 2、4、6 和 8 小时。通过光学和扫描电子显微镜以及 X 射线衍射方法的分析证实了在基材表面形成了二硼化钛 (TiB2) 单相层。硼化物层的厚度随着时间和温度的增加而增加，达到最大值 50 μm。评估基材和硼化物层的显微硬度。此外，该层的纳米力学表征是通过纳米压痕测试进行的。