The differentials of the tribological characteristics of atmospheric plasma sprayed NiAl–25Bi₂O₃–15Ag–6Cr₂O₃ composite coating sliding against counterpart Al₂O₃ was evaluated when subjected to dead temperatures and thermal cycling from RT to 800 °C. The results reveal NiAl–25Bi₂O₃–15Ag–6Cr₂O₃ composite coating demonstrates the temperature-dependent friction, and the wear is strongly determined by the tribo-induced layer that transforms along with temperature. The competition between Bi₂O₃ and Ag in terms of thermally-induced diffusion influences the frictional behaviors. The tribo-layer formed at 800 °C provides the continuous function on lessening wear even though the temperature goes down to RT. The favorable lubricating performance of NiAl–25Bi₂O₃–15Ag–6Cr₂O₃ composite coating is correlated with the composition that consists of Bi₂O₃, Ag, NiO, Cr₂O₃ and Bi₁₆CrO₂₇, which will be clarified in this study.

在室温和从室温到800°C的热循环下，评估了大气等离子喷涂NiAl–25Bi ₂ O ₃ –15Ag–6Cr ₂ O ₃复合涂层在对等Al ₂ O _3上滑动时的摩擦学特性差异。结果表明，NiAl–25Bi ₂ O ₃ –15Ag–6Cr ₂ O ₃复合涂层表现出与温度有关的摩擦，并且磨损是由摩擦诱导层随温度变化而强烈确定的。Bi ₂ O ₃之间的竞争而银在热扩散方面会影响摩擦性能。即使温度降至室温，在800°C形成的摩擦层仍可发挥连续作用，减少磨损。NiAl–25Bi ₂ O ₃ –15Ag–6Cr ₂ O ₃复合涂层的良好润滑性能与由Bi ₂ O ₃，Ag，NiO，Cr ₂ O ₃和Bi ₁₆ CrO ₂₇组成的成分有关，这将是在这项研究中得到澄清。