MoS2 formation induced by amorphous MoS3 species under lubricated friction,RSC Advances

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MoS2 formation induced by amorphous MoS3 species under lubricated friction
RSC Advances ( IF 3.9 ) Pub Date : 2018-07-19 00:00:00 , DOI: 10.1039/c8ra03317j
C Oumahi ₁ , M I De Barros-Bouchet ₂ , T Le Mogne ₂ , C Charrin ₃ , S Loridant ₁ , C Geantet ₁ , P Afanasiev ₁ , B Thiebaut ₃

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Amide molybdate has been recently introduced as a friction modifier for tribological applications. Combined with zinc dithiophosphate (ZDDP) and fatty amines, it provides an ultralow friction coefficient. The ultimate product of Mo compound transformations in tribological contact, due to frictional heating and shearing, as well as chemical interactions with oil additives, is molybdenum sulfide (MoS₂). Understanding the decomposition of amide molybdate leading to MoS₂ is of primary importance to the optimization of the design of lubricant formulations. This study focuses on the investigation by Raman spectroscopy of amide molybdate decomposition intermediates. Raman spectra of tribofilms, obtained after friction tests under different temperatures and pressures, revealed the formation of an amorphous MoS₃ intermediate coexisting with MoS₂. However, under severe conditions, the tribofilms are mostly composed of MoS₂.

中文翻译：

在润滑摩擦下由无定形 MoS3 物质诱导的 MoS2 形成

最近引入了钼酸酰胺作为摩擦学应用的摩擦改进剂。结合二硫代磷酸锌 (ZDDP) 和脂肪胺，可提供超低摩擦系数。由于摩擦加热和剪切以及与油添加剂的化学相互作用，在摩擦接触中 Mo 化合物转变的最终产物是硫化钼 (MoS ₂ )。了解导致 MoS _{2的酰胺钼酸盐的分解}对优化润滑油配方设计至关重要。本研究的重点是通过拉曼光谱研究氨基钼酸盐分解中间体。在不同温度和压力下的摩擦试验后获得的摩擦膜的拉曼光谱揭示了与MoS _{2共存的无定形MoS}₃中间体的形成。然而，在恶劣条件下，摩擦膜主要由MoS ₂组成。

更新日期：2018-07-19

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