Table 1.

The chemical compositions of the two friction materials according to desired COF and temperature values.

Chemical Composition	First Material	Second Material
C	54.37	42.40
O	26.96	27.14
Al	1.72	1.92
Si	6.33	6.26
S	1.10	2.05
Ca	3.40	5.01
Fe	3.66	4.38
Cu	1.06	4.05
Ba	0.55	1.58
Zn	0.17	2.44
Ti	0.05	0.12
Na	0.10	0.75
K	0.40	0.12
Mg	0.14	-
Sn	-	0.99
P	-	0.43
Mn	-	0.40
Max COF values	-	0.47
Min temperature variation	0.1