From: Copper-Free Resin-Based Braking Materials: A New Approach for Substituting Copper with Fly-Ash Cenospheres in Composites
Temperature (℃)
100
150
200
250
300
350
Significance
B△
A△
A**
A***
A*
A×D△
B***
A×B△
C△
A×B**
A×C△
C**
D***
D△