Open AccessWear and friction behaviour of Si3N4 ceramics under diesel and biodiesel lubrication
Author(s) -
F.A. Almeida,
Márcia Marie Maru,
Luciano N. Batista,
F.J. Oliveira,
Rui Ramos Ferreira e Silva,
Carlos A. Achete
Publication year - 2013
Publication title -
journal of materials research and technology
Language(s) - English
Resource type - Journals
eISSN - 2214-0697
pISSN - 2238-7854
DOI - 10.1016/j.jmrt.2013.01.006
Subject(s) - materials science , lubricity , intergranular corrosion , silicon nitride , lubrication , ceramic , composite material , coefficient of friction , wear coefficient , metallurgy , reciprocating motion , diesel fuel , friction coefficient , tribology , microstructure , silicon , automotive engineering , mechanical engineering , gas compressor , engineering
The wear and friction behaviour of self-mated silicon nitride pairs in lubricated ball-on-flat reciprocating sliding conditions is the subject of the present work, using diesel fuel and soybean biodiesels as lubricants. The results show that the friction coefficient is considerably higher for the diesel fuel than for biodiesels in the stationary regime (about 0.14 and 0.06, respectively). The wear coefficient values are in the range 10−8–10−9mm3/N·m, denoting a mild wear regime, in agreement with the high lubricity of these fuels assessed by the ASTM D 6079 standard. The observed wear mechanisms were mainly mechanically dominated, consisting of transgranular and intergranular fractures, and the formation of a tribolayer by plastic deformation of the wear debris
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom