This paper experimentally examines the influence of coating thickness, test temperature, coating hardness, and defects on the erosion resistance of boride coatings, ion plating CrN coatings, and thermal spraying coatings. The results demonstrate that the erosion rate of coating can be reduced effectively by improving coating hardness and thickness with the absence of the cracks of coating during the coating process. In comparison with thermal spraying coatings, boride coatings and ion plating CrN coatings are more suitable for protecting steam turbine blades from solid particle erosion due to higher erosion resistance. However, blades cannot be protected effectively when coating is thinner than a critical value θcrit. Based on our results, it is recommended that the protective coating for the steam turbine blade should be thicker than 0.02 mm. In addition, the effect of temperature on erosion resistance of the coating is strongly dependent on the properties of transition layer between coating and substrate material. For the coating without pinholes or pores in the transition layer, the variation in erosion rate with temperature is consistent with that of uncoated substrate material. However, the erosion rate of coating descends with the elevation of test temperature when a lot of pinholes or pores are produced in the transition layer.

1.
Hamed
,
A.
,
Tabakoff
,
W.
, and
Wenglarz
,
R.
, 2006, “
Erosion and Deposition in Turbomachinery
,”
J. Propul. Power
0748-4658,
22
(
2
), pp.
350
360
.
2.
Mann
,
B. S.
, 1999, “
Solid-Particle Erosion and Protective Layers for Steam Turbine Blading
,”
Wear
0043-1648,
224
(
1
), pp.
8
12
.
3.
Oka
,
Y. I.
,
Yoshida
,
T.
,
Yamada
,
Y.
,
Yasui
,
T.
, and
Hata
,
S.
, 2007, “
Evaluation of Erosion and Fatigue Resistance of Ion Plated Chromium Nitride Applied to Turbine Blades
,”
Wear
0043-1648,
263
(
1–6
), pp.
379
385
.
4.
Dai
,
L. P.
,
Yu
,
M. Z.
, and
Dai
,
Y. P.
, 2007, “
Nozzle Passage Aerodynamic Design to Reduce Solid Particle Erosion of a Supercritical Steam Turbine Control Stage
,”
Wear
0043-1648,
262
(
1–2
), pp.
104
111
.
5.
Tabakoff
,
W.
, and
Shanov
,
V.
, 1995, “
Erosion Rate Testing at High Temperature for Turbomachinery Use
,”
Surf. Coat. Technol.
0257-8972,
76–77
(
1–3
), pp.
75
80
.
6.
Wang
,
S. S.
,
Liu
,
G. W.
,
Mao
,
J. R.
, and
Feng
,
Z. P.
, 2007, “
Experimental Investigation on the Solid Particle Erosion in the Control Stage Nozzles of Steam Turbine
,”
Proceedings of the ASME Turbo Expo 2007
, Vol.
6
, pp.
713
721
.
7.
Kawagishi
,
H.
,
Kawasaki
,
S.
,
Ikeda
,
K.
,
Yamamoto
,
M.
, and
Watanabe
,
O.
, 1990, “
Protective Design and Boride Coating Against Solid Particle Erosion of First-Stage Turbine Nozzles
,”
Advances in Steam Turbine Technology for Power Generation
,
10
, pp.
23
29
.
8.
Qureshi
,
J. I.
, and
Tabakoff
,
W.
, 1988, “
Influence of Coating Processes and Process Parameters on Surface Erosion Resistance and Substrate Fatigue Strength
,”
Surf. Coat. Technol.
0257-8972,
36
(
1–2
), pp.
433
444
.
9.
Ortolano
,
R. J.
, 1985,
Resisting Steam Turbine Abrasion Damage by Using Surface Improvement Systems
,
ASME
,
New York
/
IEEE
,
New York
.
10.
Kramer
,
L. D.
,
Qureshi
,
J. I.
,
Rousseau
,
R. A.
, and
Ortolano
,
R. J.
, 1983,
Improvement of Steam Turbine Hard Particle Eroded Nozzles Using Metallurgical Coatings
,
ASME
,
New York
/
IEEE Power Engineering
,
New York
/
ASCE
,
New York
.
11.
Gat
,
N.
, and
Tabakoff
,
W.
, 1980, “
Effects of Temperature on the Behavior of Metals Under Erosion by Particulate Matter
,”
J. Test. Eval.
0090-3973,
8
(
4
), pp.
177
186
.
12.
Shanov
,
V.
,
Tabakoff
,
W.
, and
Singh
,
R. N.
, 2002, “
CVD Diamond Coating for Erosion Protection at Elevated Temperatures
,”
J. Mater. Eng. Perform.
1059-9495,
11
(
2
), pp.
220
225
.
13.
Tabakoff
,
W.
, and
Hamed
,
A.
, 1988, “
Temperature Effect on Particle Dynamics and Erosion in Radial Inflow Turbine
,”
ASME J. Turbomach.
0889-504X,
110
(
2
), pp.
258
264
.
14.
Trezona
,
R. I.
, and
Hutchings
,
I. M.
, 2001, “
Resistance of Paint Coatings to Multiple Solid Particle Impact: Effect of Coating Thickness and Substrate Material
,”
Prog. Org. Coat.
0300-9440,
41
(
1–3
), pp.
85
92
.
15.
Lathabai
,
S.
,
Ottmuller
,
M.
, and
Fernandez
,
I.
, 1998, “
Solid Particle Erosion Behaviour of Thermal Sprayed Ceramic, Metallic and Polymer Coatings
,”
Wear
0043-1648,
221
(
2
), pp.
93
108
.
16.
Wheeler
,
D. W.
, and
Wood
,
R. J. K.
, 2001, “
High Velocity Sand Impact Damage on CVD Diamond
,”
Diamond Relat. Mater.
0925-9635,
10
(
3–7
), pp.
459
462
.
17.
Wood
,
R. J. K.
, 2007, “
Tribo-Corrosion of Coatings: A Review
,”
J. Phys. D: Appl. Phys.
0022-3727,
40
(
18
), pp.
5502
5521
.
18.
Tabakoff
,
W.
, 1999, “
Protection of Coated Superalloys From Erosion in Turbomachinery and Other Systems Exposed to Particulate Flows
,”
Wear
0043-1648,
233–235
, pp.
200
208
.
19.
Hassani
,
S.
,
Bielawski
,
M.
,
Beres
,
W.
,
Martinu
,
L.
,
Balazinski
,
M.
, and
Klemberg-Sapieha
,
J. E.
, 2008, “
Predictive Tools for the Design of Erosion Resistant Coatings
,”
Surf. Coat. Technol.
0257-8972,
203
(
3–4
), pp.
204
210
.
20.
Bielawski
,
M.
, and
Beres
,
W.
, 2007, “
Fe Modelling of Surface Stresses in Erosion-Resistant Coatings Under Single Particle Impact
,”
Wear
0043-1648,
262
(
1–2
), pp.
167
175
.
21.
Hassani
,
S.
,
Klemberg-Sapieha
,
J. E.
,
Bielawski
,
M.
,
Beres
,
W.
,
Martinu
,
L.
, and
Balazinski
,
M.
, 2008, “
Design of Hard Coating Architecture for the Optimization of Erosion Resistance
,”
Wear
0043-1648,
265
(
5–6
), pp.
879
887
.
22.
Evans
,
A. G.
,
Gulden
,
M. E.
, and
Rosenblatt
,
M.
, 1978, “
Impact Damage in Brittle Materials in the Elastic-Plastic Response Regime
,”
Proc. R. Soc. London, Ser. A
0950-1207,
361
(
1706
), pp.
343
365
.
23.
Finnie
,
I.
, 1960, “
Erosion of Surfaces by Solid Particles
,”
Wear
0043-1648,
3
(
2
), pp.
87
103
.
24.
Evans
,
A. G.
, and
Marshall
,
D. B.
, 1980, “
Wear Mechanisms in Ceramics
,” Fundamentals of Friction and Wear of Materials, papers presented at the 1980 ASM Materials Science Seminar, pp. 439–452.
You do not currently have access to this content.