Submicron-Lubricant Based on Crystallized Fe3O4 Spheres for Enhanced Tribology Performance

被引：62

作者：

Song, Xiaoyun ^{[1
]}

Qiu, Zhiwen ^{[1
]}

Yang, Xiaopeng ^{[1
]}

Gong, Haibo ^{[1
]}

Zheng, Shaohua ^{[1
]}

Cao, Bingqiang ^{[1
]}

Wang, Hongqiang ^{[2
]}

Moehwald, Helmuth ^{[2
]}

Shchukin, Dmitry ^{[3
]}

机构：

[1] Univ Jinan, Sch Mat Sci & Engn, Lab Inorgan Funct Mat Univ Shandong, Jinan 250022, Peoples R China

[2] Max Planck Inst Colloids & Interfaces, Dept Interfaces, D-14424 Potsdam, Germany

[3] Univ Liverpool, Dept Chem, Stephenson Inst Renewable Energy, Liverpool L69 7ZF, Merseyside, England

来源：

CHEMISTRY OF MATERIALS | 2014年 / 26卷 / 17期

基金：

美国国家科学基金会;

关键词：

BOTTOM-UP CONSTRUCTION; LASER-ABLATION; OPTICAL-PROPERTIES; ZNO NANOPARTICLES; CARBON NANOTUBES; LIQUID; PARTICLES; REDUCTION; BEHAVIOR; FABRICATION;

D O I：

10.1021/cm502426y

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We demonstrate in this paper a novel finding of submicron-lubricant exemplified by crystallized magnetite (Fe3O4) submicrometer spheres. Optimized tribological performance of lubricant particles occurs when the particles are submicrometer sized and spherical. The tribology of lubricant particles is thus verified to be size and shape dependent. Owing to the unique heating and quenching process involved in pulsed laser irradiation, Fe3O4 submicrometer spheres are acquired through phase transformation and reshaping. The formation process of the regular Fe3O4 spheres in deionized water was investigated by choosing different laser fluences and irradiation times. The shape and phase transformation mechanisms are elucidated as well. Tribological properties of the obtained Fe3O4 submicrometer spheres have been explored, inspired by their spherical shape and smooth surfaces. Crystallized magnetite submicrometer spheres under optimized conditions show a reduction in friction and wear by up to 40% and 20%, respectively. Control experiments revealed that nanoparticles, nonspherical submicrometer particles, and micrometer particles could not reach such good tribology performance, indicating the potential of adopting crystallized Fe3O4 submicrometer spheres in the application of mechanical energy saving.

引用

页码：5113 / 5119

页数：7

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