Recently, much attention has been paid to the influence of airborne particles in the atmosphere on human health. Sliding contacts are a significant source of airborne particles in urban environments. In this study airborne particles generated from a sliding steel-on-steel combination are studied using a pin-on-disk tribometer equipped with airborne-particle counting instrumentation. The instrumentation measured particles in size intervals from 0.01μm to 32μm. The result shows three particle size regimes with distinct number peaks: ultrafine particles with a size distribution peak around 0.08μm, fine particles with a peak around 0.35μm, and coarse particles with a peak around 2 or 4μm. Both the particle generation rate and the wear rate increase with increasing sliding velocity and contact pressure.

1.
Pope
,
C. A.
, III
,
Thun
,
M. J.
,
Namboodiri
,
M. M.
,
Dockery
,
D. W.
,
Evans
,
J. S.
,
Speizer
,
F. E.
, and
Heath
,
C. W.
, Jr.
, 1995, “
Particulate Air Pollution as a Predictor of Mortality in a Prospective Study of U.S. Adults
,”
Am. J. Respir. Crit. Care Med.
1073-449X,
151
, pp.
669
674
.
2.
Dockery
,
D. W.
,
Pope
,
A.
, III
,
Xu
,
X.
,
Spengler
,
J. D.
,
Ware
,
J. H.
,
Fay
,
M. E.
,
Ferris
,
B. G.
, Jr.
, and
Speizer
,
F. E.
, 1993, “
An Association Between Air Pollution and Mortality in Six U.S. Cities
,”
J. Med. (Oporto)
0021-7573,
329
, pp.
1753
1759
.
3.
Karlsson
,
H. L.
,
Nilsson
,
L.
, and
Möller
,
L.
, 2005, “
Subway Particles are More Genotoxic Than Street Particles and Induce Oxidative Stress in Cultured Human Lungs
,”
Chem. Res. Toxicol.
0893-228X,
18
, pp.
19
23
.
4.
WHO
, 2004, Health Aspects of Air Pollution, WHO Europe.
5.
Hinds
,
W. C.
, 1999,
Aerosol Technology, Properties, Behavior and Measurement of Airborne Particles
, 2nd ed.,
Wiley
,
New York
, pp.
46
47
.
6.
Olofsson
,
U.
, and
Olander
,
L.
, 2006, “
On the Identification of Wear Modes and Transitions Using Airborne Wear Particles Generated From Sliding Steel-on-Steel Contact
,”
Wear
0043-1648, submitted.
7.
Peters
,
T. M.
,
Ott
,
D.
, and
O’Shaughnessy
,
P. T.
, 2006, “
Comparison of the Grimm 1.108 and 1.109 Portable Aerosol Spectrometer to the TSI 3321 Aerodynamic Particle Sizer for Dry Particles
,”
Ann. Occup. Hyg.
0003-4878,
50
(
8
), pp.
843
850
.
8.
Zhu
,
Y.
,
Yu
,
N.
,
Kuhn
,
T.
, and
Hinds
,
W.
, 2006, “
Field Comparison of P-Trak and Condensation Particle Counters
,”
Aerosol Sci. Technol.
0278-6826,
40
, pp.
422
430
.
9.
Knutson
,
E. O.
, and
Whitby
,
K. T.
, 1975, “
Aerosol Classification by Electric Mobility: Apparatus Theory and Applications
,”
J. Aerosol Sci.
0021-8502,
6
(
6
), pp.
443
451
.
10.
Lim
,
S. C.
,
Ashby
,
M. F.
, and
Brunton
,
J. H.
, 1987, “
Wear-Rate Transitions and Their Relationship to Wear Mechanisms
,”
Acta Metall.
0001-6160,
35
, pp.
1343
1348
.
11.
Kittelson
,
D. B.
, 1998, “
Engines and Nanoparticles: A Review
,”
J. Aerosol Sci.
0021-8502,
29
, pp.
575
588
.
12.
Zimmer
,
A. T.
, and
Maynard
,
A. D.
, 2002, “
Investigations of the Aerosols Produced by a High-Speed Hand-Held Grinder Using Various Substrates
,”
Ann. Occup. Hyg.
0003-4878,
46
, pp.
663
672
.
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