This paper addresses friction energy-induced reduction of TiO2 during abrasive wear and friction of alumina–titania coatings with different TiO2 content. Alumina–13% titania and alumina–40% titania coatings were deposited by atmospheric plasma spray technique. An improvement in fracture toughness and better densification of coatings was observed with an increase in titania content. Alumina–40% titania coating showed lower friction coefficient and higher abrasive wear resistance than alumina–13% titania coating. An increase in friction energy was associated with enhanced reduction of TiO2 to Ti2O3 and an increase in the extent of gamma alumina to alpha alumina phase conversion. These observations along with structural and mechanical properties of coatings could explain differences in tribological response of these coatings. Friction energy parameter (FEP) was used to identify different regimes of wear and degradation mode of coatings.

中文翻译：

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摩擦能和减少摩擦在氧化铝-二氧化钛涂层磨损中的作用

本文讨论了摩擦能引起的 TiO2 还原2不同 TiO2 氧化铝-二氧化钛涂层的磨损和摩擦过程2内容。通过大气等离子喷涂技术沉积氧化铝-13% 二氧化钛和氧化铝-40% 二氧化钛涂层。随着二氧化钛含量的增加，观察到断裂韧性和涂层致密性的提高。氧化铝-40% 二氧化钛涂层比氧化铝-13% 二氧化钛涂层表现出更低的摩擦系数和更高的耐磨性。摩擦能的增加与二氧化钛的还原增强有关2对钛2○3并且增加了γ氧化铝向α氧化铝相转化的程度。这些观察结果以及涂层的结构和机械性能可以解释这些涂层摩擦学响应的差异。摩擦能参数 (FEP) 用于识别涂层的不同磨损状态和退化模式。