论文标题
负热膨胀引起干滑摩擦中磨损的抑制
Negative thermal expansion induced suppression of wear in dry sliding friction
论文作者
论文摘要
表面温度是至关重要的因素之一，在滑动干触点期间控制磨损。使用计算机建模，我们研究了在特殊类型的材料的滑动摩擦期间获得接近零的表面磨损速率的可能性，这些材料具有负面的热膨胀。数值模拟显示了负面热膨胀材料的两个磨损状态，取决于所应用的正常应力水平。当施加的应力低于临界水平的应力时，在摩擦期间达到了稳定的几乎零磨损速率和纳米奥表面。否则，磨损速率与正热膨胀材料的数量级相同。根据材料的机械，热物理和表面粗糙度特性，对临界应力值进行了分析。
Surface temperature is among crucial factors, which control wear during sliding dry contact. Using computer modeling, we study the possibility to achieve close to zero rate of surface wear during sliding friction of the special type of materials, which possess negative thermal expansion. The numerical simulations reveal two wear regimes for negative thermal expansion materials as dependent on the applied normal stress level. When the applied stress is lower than that of a critical level, a steady almost zero wear rate and nanorough surface are achieved during friction. Otherwise, wear rate is of the same order of magnitude as for positive thermal expansion materials. The critical stress value is analyzed as depending on the material's mechanical, thermophysical, and surface roughness characteristics.
