Harnessing nano oil reservoir network for generating low friction and wear in self-mating alumina

Materials & Design

Adithyan Annamalai¹  Patrik Hoffmann²  Pushkar Deshpande³  Sriharitha Rowthu⁴ 

[1] Corresponding authors at: Materials Engineering, Indian Institute of Technology (IIT) Gandhinagar, 382355 Gujarat, India (S. Rowthua);Laboratory for Advanced Materials Processing, Empa, Swiss Federal Laboratories for Materials Science and Technology, Feuerwerkerstrasse 39, Thun 3602, Switzerland (P. Hoffmann).;Laboratory for Advanced Materials Processing, Empa, Swiss Federal Laboratories for Materials Science and Technology, Feuerwerkerstrasse 39, Thun 3602, Switzerland;Materials Engineering, Indian Institute of Technology (IIT) Gandhinagar, 382355 Gujarat, India;

关键词: Oil infusion;    Perfluoropolyether;    Nanoporous alumina;    Abrasive wear;   

DOI  :  

来源: DOAJ

【 摘 要 】

This study unleashes the potential of nanoporous connected networks as excellent oil reservoirs for reducing friction and wear in Al2O3-Al2O3 tribo-pairs. Alumina were fabricated via slip casting and sintering to generate wide-ranging densifications (70–99.5%) and slid in a reciprocating flat-on-flat configuration. Friction coefficients (FCs) lie between 0.025 and 0.37 which decreased with an increase in normal load (10–220 N), lubricant’s viscosity (19, 289 mPa·s) and sliding frequency (6, 12, 24 Hz). A central finding is that FCs of infused specimens are smaller than those of surface lubricated. Wear rates decreased from 10−5 to <10−8 mm3·N−1·m−1 for an increase in Al2O3 density. Wear occurred predominantly via intergranular and transgranular fracture modes as revealed by the electron microscopy studies.

【 授权许可】

Unknown