Atom-probe tomography of tribological boundary films resulting from boron-based oil additives

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• 作者：Yoon-Jun Kim^a ; ^b ; Sung-Il Baik^b ; ^c ; Leonardo Bertolucci-Coelho^d ; Luca Mazzaferro^d ; Giovanni Ramirez^e ; Ali Erdermir^e ; David N. Seidman^b ; ^c ; ^{d-seidman@northwestern.edu" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Atom-probe tomography ; Transmission electron microscopy ; Tribofilm ; Boron oxide ; Lubricant
• 刊名：Scripta Materialia
• 出版年：2016
• 出版时间：15 January 2016
• 年：2016
• 卷：111
• 期：Complete
• 页码：64-67
• 全文大小：1541 K

文摘

Correlative characterization using atom-probe tomography (APT) and transmission electron microscopy (TEM) was performed on a tribofilm formed during sliding frictional testing with a fully formulated engine oil, which also contains a boron-based additive. The tribofilm formed is ∼15 nm thick and consists of oxides of iron and compounds of B, Ca, P, and S, which are present in the additive. This study provides strong evidence for boron being embedded in the tribofilm, which effectively reduces friction and wear losses.