Tribological behavior of hot pressed HfB2-5%TiSi2 composite was studied under reciprocative sliding condition using cemented tungsten carbide (WC-Co) ball as counter body. Coefficient of friction (COF) for HfB2 composite sample was obtained in the range of 0.43 to 0.63 at different loads. It was observed that enhancement of load from 5 to 15 N resulted in decrease of COF of HfB2. Specific wear rate of HfB2 composite was evaluated in the order of 10–6 mm3/N.m. Microstructures of wear scar revealed that tribochemical layer was formed on the worn surface of HfB2 (flat). GRAPHICAL ABSTRACT

中文翻译：

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二硼化铪基材料的摩擦学行为

以硬质合金 (WC-Co) 球为配合体，研究了在往复滑动条件下热压 HfB2-5%TiSi2 复合材料的摩擦学行为。在不同负载下，HfB2 复合材料样品的摩擦系数 (COF) 在 0.43 至 0.63 的范围内获得。观察到负载从 5 N 增加到 15 N 导致 HfB2 的 COF 降低。HfB2 复合材料的比磨损率按 10-6 mm3/Nm 的数量级进行评估。磨痕的微观结构表明在 HfB2 的磨损表面上形成了摩擦化学层（平坦）。图形概要