Research Information System
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA, vol.25, no.3, pp.677-682, 2015 (SCI-Expanded)
The potential of powder metallurgy processing for the manufacture of Al-SrB6 composites was explored. Al4Sr particles fractured extensively during the ball milling of Al-15Sr/Al-4B powder mixtures. There was no interaction between the Al4Sr and AlB2 compounds across the section of the aluminium grains in the as-milled state. SrB6 formed, when the ball milled powder blends were subsequently annealed at sufficiently high temperatures. Ball milling for 1 h was sufficient for SrB6 to become the major constituent in powder blends annealed at 700 degrees C while it took 2 h of ball milling for powder blends annealed at 600 degrees C. Higher annealing temperatures and longer ball milling time encouraged the formation of the SrB6 compound while the latter made a great impact on the microstructural features of the Al-SrB6 composite. The SrB6 compound particles were much smaller and more uniformly distributed across the aluminium matrix grains in powder grains ball milled for 2 h before the annealing treatments at 600 degrees C and 700 degrees C.