MAX phase materials are hexagonal ternary carbides or nitrides with structures of nanolayers, that provide a unique and interesting combination of both metallic and ceramic properties.
MAX phase materials exhibit high stiffness, easy machinability, super ductility and importantly have an impressive ductile-to-brittle transition temperature ranging from 825 to 1950 °C. Apart from the above mentioned attractive characteristics, MAX phase materials also demonstrate excellent resistance to aggressive machining medium and high thermal and electrical conductivity, which makes easier to use it as biosensor drill applications.
Unit cells of the Mn+1AXn phases for (a) n = 1 or M2AX, (b) n = 2 or M3AX2, and (c) n = 3 or M4AX3 phases
Figure Curtesy: Annual Review of Materials Research 41(1):195-227
However, what makes the material more attractive to me is, the process which makes the excellent quality MAX phase materials. Physical Vapor Deposition (PVD) is the best way to produce high quality Cr2AlC MAX phase material, and we, AVALUXE supply high quality targets AlCr targets and metal doped carbon targets with excellent HiPIMS recipes for such processes.
We are excited to share our experimental studies with High Power Impulse Magnetron Sputtering (HiPIMS) process used to deposit MAX phase Cr2AlC material, as it has shown an excellent resistance to high-temperature oxidation in air due to the formation of a continuous, dense, and adherent alumina scale layers during the machining process. Nevertheless the diffusion and oxidation of aluminum in the material in cracks also result in self-healing properties and thermal-shock resilience to the overall coating layer system.
Comparison of theoretical and experimental values of bulk and Young's modulus E Figure
Curtesy: Annual Review of Materials Research 41(1):195-227
Our customers in Proton exchange membrane (PEM) fuel cells, aircraft industries and tool coatings have a great reason to cheer that we are involving in the development of MAX phase coatings for other applications and obtain very impressive outcomes.
Our early results shown that a substantial improvement has been observed with the corrosion resistance property of steel bipolar plates in fuel cells. Cr2AlC coatings are also suitable for the corrosion resistance property in the materials used in aircraft turbines. A promising results has been obtained in an attempt to increase the lifetime and operating temperature of thermal barrier coatings and to protect turbine blades from erosion.