Fabrication and squeeze casting infiltration of graphite/alumina preforms

摘要

The manufacturing of a suitable rigid porousgraphite/alumina preform has been investigated taking intoaccount the influence of the binder type, the graphite/aluminacontent in the preform and the percentage of binder in water. Thepreforms showing an acceptable rigidity have been infiltrated witha CuSn 12 bronze alloy by squeeze casting considering twodifferent bouring temperatures. The composite quality is stronglyinfluenced by both the graphite/alumina volume fractions and thebinder type. The optimal quality has been obtained by infiltrating aCarsil 2000TM binded preform containing 30vol % graphite flakesand 70 vol% alumina fibers.