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Nan, Feng; Zhou, Kaihe; Liu, Shuan; Pu, Jibin; Fang, Yunhui; Ding, Wenxuan
RSC advances, 01/2018, Letnik: 8, Številka: 3Journal Article
Attapulgite is a layered silicate with good friction-reduction and self-repairing properties. In order to further improve its tribological properties, the present work mainly focuses on the preparation of attapulgite/La 2 O 3 nanocomposite and study on its tribological behaviors. The tribological properties of mineral lubricating oil (150SN) containing attapulgite/La 2 O 3 nanocomposite were investigated through an Optimal SRV-IV oscillating friction and wear tester. The rubbing surfaces and generated tribofilms were characterized by SEM, EDS, XPS and nanoindentation. Results indicated that the friction-reducing ability and antiwear property of the oil were both remarkably improved by attapulgite/La 2 O 3 nanocomposite. A tribofilm mainly composed of Fe, Fe 3 C, FeO, Fe 2 O 3 , FeOOH, SiO, SiO 2 and organic compound was formed on the rubbing surface under the lubrication of oil with attapulgite/La 2 O 3 nanocomposite. The tribofilm possess excellent self-lubricating ability and mechanical properties, which is responsible for the reduction of friction and wear. Attapulgite is a layered silicate with good friction-reduction and self-repairing properties.
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