Hannah Ullberg, “Cast Magnesium Foam for Energy Absorption and Bone Regrowth”
Mentor: Pradeep Rohatgi, Materials Science & Engineering
In this work, a critical review of the casting of magnesium foams for energy absorption and biomedical applications is presented. Pressure infiltration for synthesis of close cell cast magnesium syntactic foams incorporating hollow alumina microballoons has been described along with microstructural and mechanical analysis. Additionally, in this paper a case study of a novel, low-cost pressure infiltration and investment casting technique for synthesis of open cell magnesium foams for use as bone cell regrowth scaffolds. Finite element analysis simulations were performed for foam compression. A simulated foam compressed 0.23mm under loading that cortical bone can withstand, 150MPa. The experimental and simulated results show that a low-cost magnesium foam can be cast using pressure infiltration with a controlled porosity and strength for use in energy absorption or bone regrowth.