Open AccessOn-line and post-mortem wear measurement of static counterpart in a ball-on-disk test
Author(s) -
Yeczain Pérez Delgado,
K. Bonny,
Patrick De Baets,
V. Rodríguez,
Patric Daniel Neis,
Jacob Sukumaran,
Olivier Malek,
Fei Zhang,
Bert Lauwers
Publication year - 2012
Publication title -
sustainable construction and design
Language(s) - English
Resource type - Journals
eISSN - 2295-9092
pISSN - 2032-7471
DOI - 10.21825/scad.v3i2.20569
Subject(s) - abrasive , ball (mathematics) , materials science , silicon carbide , composite material , profilometer , polishing , wear coefficient , coefficient of friction , grinding , surface finish , tribology , geometry , mathematics
this paper presents an experimental evaluation of friction coefficient and wear of WC binderlessceramics. The tests were conducted at room temperature and atmospheric conditions according to theASTM G99-95a standard. Silicon carbide (SiC) balls were used as static counterpart. The tests wereperformed at a rotating sliding speed of 0.3 m/s and an initial mean Hertzian contact pressure of 1.9 GPa.The disk specimens were surface finished by grinding. On-line monitoring and post-mortem analysis withtwo independent techniques, i.e., surface profilometry and optical microscopy, were used to elucidate thetribological characteristics of the studied material. Results of the post-mortem measurements werecompared to a geometrical wear model for calculation of the volume of the worn cap of the ball. Thiscalculation appeared to be in good agreement with the on-line wear monitoring. The first 100 m of slidingwas identified as running-in period. Beyond a sliding distance of 100 m a steady stage in penetration depthwas reached, while a higher fluctuation in friction coefficient was observed, which could be attributed to theinteraction with wear particles and simultaneous formation and delamination of debris layer, polishing andabrasion.