Ultrathin Nanosheets of MAX Phases with Enhanced Thermal and Mechanical Properties in Polymeric Compositions: Ti3Si_(0.75)Al_(0.25)C2

摘要

Since first reported, layered ternary carbides and nitrides named "MAX phases" from M_(n+1)AX_n (n = 1, 2 or 3) phases, where M is a transition metal, A is a group IIIA or IVA element, and X is carbon or nitrogen atoms, have attracted the attention of scientists and industry for their unique combination of metallic and ceramic properties. For example, MAX phases show excellent resistance to oxidation, heat, and corrosion, high electrical conductivity, high strength and elastic modulus, and are easily produced, benefiting from their inherent lamellar structure with alternately arranged MX and A layers (Figure 1 a). Currently, the study and application of MAX phases is still restricted to three-dimensional (3D) bulk samples. Nano-sized materials, especially ultrathin two-dimensional (2D) nanosheets, show enhanced properties with respect to their corresponding bulk counterpart.