Sample 1

AA-6061 + 5% Coarse SiC

Sample 5

Pure Al

Sample 2

AA-6061 + 5% Finer SiC

Sample 6

AA-6061

Sample 3

Pure Al + 5% Al₂O₃

Sample 7

AA-4032

Sample 4

AA-4032 + 5% Al₂O₃