|About this Abstract
||Materials Science & Technology 2012
||Controlled Synthesis, Processing, and Applications of Structural and Functional Nanomaterials
||Thermally Stable Nano-grained Mg Composites Reinforced with MAX Phases
||Babak Anasori, Matthias Agne, Michel W. Barsoum
|On-Site Speaker (Planned)
Nano-grained (50 nm) Mg composites were fabricated by a simple method of pressureless melt infiltration of Mg and Mg alloy into the porous preforms of Ti<sub>2</sub>AlC and Cr<sub>2</sub>AlC, members of MAX phase family. The MAX phases are machinable ternary carbides and nitrides that are relatively light and stiff. These composites have outstanding mechanical properties. When a commercially available Mg alloy, AZ61, is used to infiltrate the Ti<sub>2</sub>AlC preform, ultimate tensile stresses of 800 MPa are achieved. In addition, the composites can damp about 25% of mechanical energy at high stresses. The Mg nanograins are extraordinary thermally stable; annealing at 90% of melting point of Mg did not lead to any grain growth. Since the fabrication method is quite simple and scalable, it is possible to make Mg nanocomposite parts as large as parts made today by powder metallurgy easily and economically.