A ZA22/Al interpenetrating phase composite with high compressive stress plateau and high damping capacity

Abstract

A ZA22/Al interpenetrating phase composite (IPC) was prepared by a two-step infiltration method for the first time. The ZA22 alloy and the Al matrix were well bonded together, and a layer with ultrafine grains containing Al, Zn and O elements was formed between them. Lamellar eutectoid structure (LES) in original ZA22 alloy transformed to granular eutectoid structure (GES) with submicron sized α and η phases, resulting in a significant increase in phase interface density. The property test results showed that the IPC has a high compressive stress plateau and a high damping capacity up to 0.2. Correlated mechanisms were discussed.