hot pressingmaterials preparationniobium compoundsquenching (thermal)thermal conductivitythermal expansionVickers hardnessDense Nb 2 AlC ceramic was synthesized from NbC, Nb, and Al powder mixture at 1650°C and a pressure of 30 MPa for 90 min using an in situ reaction/hot-pressing method. The ...
A High‐Temperature Neutron Diffraction Study of Nb2AlC and TiNbAlCHerein, we report on the crystal structures of Nb2AlC and TiNbAlC—actual composition (Ti0.45,Nb0.55)2AlC—compounds determined from Rietveld analysis of neutron diffraction patterns in the 300–1173 K temperature range. The ...
nm (Nb2AlC) and 135?nm (Ti2AlC). The lamellar structure of the boehmite coating is maintained after calcination at 400?°C in air, resulting in coatings with a maximum surface area of 41?m2?g?1 (Nb2AlC) and 50?m2?g?1 (Ti2AlC). The stability of the coating is assessed by using ...
At the highest temperatures, diffusion was halted after a short time, apparently by the formation of a diffusion barrier of TiC. Similarly, the interdiffusion of Ti and Nb in Ti2AlC–Nb2AlC couples was measured in the 1723–1873 K temperature range. The Dint for the Matano interface ...