β-NiAl coatings on a superalloy substrate will inevitably result in severe rumpling at elevated temperatures; however, the associated mechanisms are not completely understood. The scale behavior of β-NiAlHf coating deposited by electron beam physical vapor deposition (EB-PVD) single crystal IC21 was investigated this work. Some internal factors, including mismatch coefficient thermal expansion ...

As part of an extended program to study the fine scale chemistry of the matrix and grain boundary area of doped and alloyed Ni3A1, experiments were initiated to determine the effects of various atom probe parameters on the accuracy of measured concentrations. Samples of arc-melted as well as rapidly cooled Ni3A1 containing boron, iron and hafnium were used. The distribution of solutes in the ma...

Micro-grained thin foils made of Ni₃Al intermetallic alloy were fabricated, according to a previously described procedure, and tested as catalyst for decomposition of cyclohexane. The conversion efficiency of the catalyst was evaluated in a synthetic air atmosphere, and found to be as high as 98.7% ± 1.0% at 600 °C and 86.7% ± 3.6% at 500 °C. During the reaction, the growth of carbon nanofibers...