Ti₃Sn–NiTi Syntactic Foams with Extremely High Specific Strength and Damping Capacity Fabricated by Pressure Melt Infiltration

NiTi shape-memory alloy foams have attracted much attention due to their unique superelasticity, excellent mechanical properties, and damping capacities, but their high-temperature damping capacity and compressive strength remain to be a challenge. Herein, we demonstrate the preparation of Ti3Sn–NiTi syntactic foams using Ti58Ni34Sn8 alloy and alumina microspheres by novel pressure melt infiltration and air-cooling strategies. The syntactic...