Page 347 - Handbook of Materials Failure Analysis

344 CHAPTER 13 A concise filtergram wear particle atlas

100μm 100μm
(a) (b)

20 μm 100μm
(c) (d)
FIGURE 13.49
The different color varnish particles (200 ): (a) a light-brown varnish particle from a
compressor oil sample; (b) a brown varnish particle from a gas turbine oil sample; (c) a dark-
brown varnish particle from a gearbox oil sample; (d) a dark varnish particle from a gearbox
with varnish deposit issue.

E:\
Label A: SGS CHK3 15-5
Element Wt.% At.%
C K 69.03 81.88
C
O K 15.16 13.5
MgK 0.08 0.05
SiK 0.53 0.27
P K 0.84 0.39
EDS
S K 1.74 0.77
CaK 0.55 0.2
FeK 8.67 2.21
O
ZnK 3.39 0.74
Zn
S Fe
P
Fe Si Total 100 100
Mg Ca
2.00 4.00 6.00 6.00 10.00 12.00 14.00 16.00 18.00 KeV
(a) (b)
FIGURE 13.50
The ESEM/EDS analysis results on above light-brown varnish particle: (a) the particle ESEM
image (800 ); (b) the EDS analysis results.