The effect of CeO2 modification on flame sprayed nickel-tungsten carbide (WC) coatings was investigated. The modified coatings exhibited smaller grain sizes of the ceramic phase due to enhanced dissolution of the WC phase. The rare earth doped coatings, especially Ni-WC +0.9% wt. CeO2, showed superior abrasive wear resistance with respect to the unmodified coating mainly due to enhanced hardness. Coating modified with 0.6% wt. CeO2 demonstrated superior erosion resistance at both impact angles, 30 deg and 90 deg, respectively, primarily due to low porosity levels. Microstructural examination showed different wear mechanisms in conventional and doped coatings.

References

References
1.
Harsha
,
S. P.
,
Dwivedi
,
D. K.
, and
Agarwal
,
A.
,
2008
, “
Influence of CrC Addition in Ni-Cr-Si-B Flame Sprayed Coatings on Microstructure, Microhardness and Wear Behavior
,”,
Int. J. Adv. Manuf. Technol.
,
38
, pp.
93
101
.10.1007/s00170-007-1072-2
2.
Sharma
,
S. P.
,
Dwivedi
,
D. K.
, and
Jain
,
P. K.
,
2008
, “
Abrasive Wear Behaviour of Continuously Compacted Thermal-Sprayed Ni Base Alloy Powder Coatings in Different Conditions
,”
Int. J. Surf. Sci. Eng.
,
2
(
3/4
), pp.
240
251
.10.1504/IJSURFSE.2008.020496
3.
Branco
,
J. R. T.
,
Gansert
,
R.
,
Sampath
,
S.
,
Berndt
,
C. C.
, and
Herman
,
C.
,
2008
, “
Solid Particle Erosion of Plasma Sprayed Ceramic Coatings
,”
Mater. Res.
,
7
(
1
), pp.
147
153
.10.1590/S1516-14392004000100020
4.
Li
,
X.
,
Mo
,
Y.
,
Yu
,
X.
, and
Liu
,
W.
,
2006
, “
Influence of La2O3 on Tribological Properties of Laser Clad Ni-Base Alloy Coating for ZL108
,”
Lubrication Eng.
,
3
, pp.
103
104
.10.3969/j.issn.0254-0150.2006.03.034
5.
Wang
,
K.
,
Zhang
,
Q.
, and
Wei
,
X.
,
1998
, “
Rare-Earth La2O3 Modification of Laser-Clad Coatings
,”
J. Mater. Sci.
,
33
, pp
3573
3577
.10.1023/A:1004695010456
6.
Sharma
,
S. P.
,
Dwivedi
,
D. K.
, and
Jain
,
P. K.
,
2009
, “
Effect of La2O3 Addition on the Microstructure, Hardness and Abrasive Wear Behavior of Flame Sprayed Ni Based Coatings
,”
Wear
,
267
, pp.
853
859
.10.1016/j.wear.2008.12.029
7.
Wang
,
K. L.
,
Zhang
,
Q. B.
,
Sun
,
M. L.
,
Wei
,
X. G.
, and
Zhu
,
Y. M.
,
2001
, “
Rare Earth Elements Modification of Laser-Clad Nickel-Based Alloy Coating
,”
Appl. Surf. Sci.
,
174
, pp.
191
200
.10.1016/S0169-4332(01)00017-4
8.
Wang
,
Y.
, and
Yan
,
M.
,
2006
, “
The Effect of CeO2 on the Erosion and Abrasive Wear of Thermal Sprayed FeAl Intermetallic Alloy Coatings
,”
Wear
,
261
, pp.
1201
1207
.10.1016/j.wear.2006.03.039
9.
Ghosh
,
P. K.
,
Kaushal
,
O. P.
, and
Sharma
,
S. K.
,
1992
, “
The Influence of Heat Treatment on the Properties of Wear Resistant Tungsten Carbide Embedded Nickel Base Coating Produced by Gas Thermal Spraying
,”
ISIJ Int.
,
32
, pp.
250
256
.10.2355/isijinternational.32.250
10.
Ye
,
H.
,
Zhang
,
X. B.
,
Xue
,
Z. F.
,
Fan
,
Y. H.
, and
Chen
,
K.
,
2009
, “
Effect of CeO2 on Microstructure and Properties of WC/Ni60 Coating by Laser Cladding
,”
Adv. Mater. Res.
,
79–82
, pp.
795
798
.10.4028/www.scientific.net/AMR.79-82.795
11.
Wu
,
C.
,
Ma
,
M.
,
Liu
,
W.
,
Zhong
,
M.
,
Zhang
,
H.
, and
Zhang
,
W.
,
2009
, “
Laser Cladding In-Situ Carbide Particle Reinforced Fe-Based Composite Coatings With Rare Earth Oxide Addition
,”
J. Rare Earths
,
27
, p.
997
1002
.10.1016/S1002-0721(08)60377-4
12.
Yang
,
Q.
,
Senda
,
T.
, and
Ohmori
,
A.
,
2003
, “
Effect of Carbide Grain Size on Microstructure and Sliding Wear Behavior of HVOF-Sprayed WC–12% Co Coatings
,”
Wear
,
254
, pp.
23
34
.10.1016/S0043-1648(02)00294-6
13.
Wu
,
P.
,
Du
,
H. M.
,
Chen
,
X. L.
,
Li
,
Z. Q.
,
Bai
,
H. L.
, and
Jiang
,
E. Y.
,
2004
, “
Influence of WC Particle Behavior on the Wear Resistance Properties of Ni–WC Composite Coatings
,”
Wear
,
257
, pp.
142
147
.10.1016/j.wear.2003.10.019
14.
Hussainova
,
I.
,
2001
, “
Some Aspects of Solid Particle Erosion of Cermets
,”
Tribol. Int.
,
34
, pp.
89
93
.10.1016/S0301-679X(00)00140-7
15.
Engqvist
,
H.
,
Axen
,
N.
, and
Hogmark
,
S.
,
1999
, “
Tribological Properties of a Binderless Carbide
,”
Wear
,
232
, p.
157
162
.10.1016/S0043-1648(99)00140-4
16.
Anand
,
K.
, and
Conrad
,
H.
,
1989
, “
Microstructure Effects in the Erosion of Cemented Carbides
,”
Wear Mater.
,
1
, pp.
136
142
.
17.
Sari
,
N.
, and
Sinmazcelik
,
T.
,
2007
, “
Erosive Wear Behaviour of Carbon Fibre/Polyetherimide Composites Under Low Particle Speed
,”
Mater. Des.
28
(
1
), pp.
351
355
.10.1016/j.matdes.2005.05.014
18.
Feng
,
Z.
, and
Ball
,
A.
,
1999
, “
The Erosion of Four Materials Using Seven Erodents—Towards an Understanding
,”
Wear
,
233–235
, pp.
674
684
.10.1016/S0043-1648(99)00176-3
19.
Hussainova
,
I.
,
Kübarsepp
,
J.
, and
Shcheglov
,
I.
,
1999
, “
Investigation of Impact of Solid Particles Against Hard Metal and Cermet Targets
,”
Tribol. Int.
,
32
, pp.
337
344
.10.1016/S0301-679X(99)00073-0
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