Abstract

Coating adherence, friction coefficient, surface temperature, and wear mass loss are determined for a set of scale reduced steel brake disks on which NiCr cement based coatings and low conductivity subcoatings are plasma sprayed. The related pads are made of either sintered iron copper or sintered aluminum titanate. It is mainly shown that NiCr-Cr3C2 cermet coating on the disk, coupled with sintered aluminum titanate pad, leads to good damage resistance and stable friction coefficient in the simulation of high speed train braking. Low conductivity sublayers are also involved and it is found that temperatures in disc or pad may be also controlled.

Issue Section:
Research Papers
Topics:
Brakes, Ceramics, Disks, Friction, Temperature, Wear, Coatings, Aluminum, Coating processes, Electrical conductivity, Thermal conductivity, Braking, Cements (Adhesives), Cermets, Copper, Damage, Iron, Plasmas (Ionized gases), Simulation, Steel, Trains
1.
Bertier, Y., and Godet, M., 1986 “Me´canique de la tribologie. Applications aux ce´ramiques,” L’industrie Ce´ramique, Sept, pp. 565–568.
2.
Boogers, J. A. M., Wanhill, R. J. H., and Hersbach, H. J. C., 1989, “Thermal Shock and Oxydation Resistance of Ceramic Coatings,” Agard Conference Proceedings FRA, Vol. 461, pp. 131–136.
3.
Catlaw, H. S., and Jaeger, J. C., 1958, Conduction of Heat in Solids, 2nd ed., Oxford at the Clarendon Press, p. 88.
4.
Chuanxian
D.
,
Bingtang
H.
, and
Huiling
L.
,
1984
, “
Plasma-Sprayed Wear-Resistant Ceramic and Cermet Coating Materials
,”
Thin Solid Films
, Vol.
118
, pp.
485
–
493
.
5.
Herman
H.
,
Shankar
N. R.
,
1987
, “
Survivability of Thermal Barrier Coatings
,”
Materials Science and Engineering
, Vol.
88
, pp.
69
–
74
.
6.
Lacoˆte, F., 1991 “La politique des mate´riels neufs a` la S.N.C.F.,” Revue Ge´ne´rale des Chemins de Fer, 7/8, pp. 9–10.
7.
Miller
R. A.
, and
Berndt
C. C.
,
1984
, “
Performance of Thermal Barrier Coatings in High Heat Flux Environments
,”
Thin Solid Films
, Vol.
119
, pp.
195
–
202
.
8.
Padovan
J.
,
Dougherty
D.
,
Hendricks
R.
,
Braun
M. J.
, and
Chung
F.
,
1984
, “
High Temperature Thermomechanical Analysis of Ceramic Coatings
,”
Journal of Thermal Stresses
, Vol.
7
, pp.
51
–
74
.
9.
Stecura, S., 1985 “Optimization of the NiCrAlY/Zr02-Y203 Thermal Barrier System,” NASA Tech. Memo. 86905.
This content is only available via PDF.
Copyright © 1996
 by The American Society of Mechanical Engineers
You do not currently have access to this content.