Journal of Physics D-Applied Physics
Some properties of a nanocrystalline Ni-P alloy and an amorphous alloy of the same chemical composition, including the thermal expansion coefficient, specific heat capacity, electrical resistance and thermal stability, are experimentally measured and compared. The results show that the properties of the nanocrystalline alloy are very different from those of the amorphous alloy.
关键词:
sized crystalline materials
Journal of Applied Physics
A new method to prepare nanocrystalline alloys was developed by means of crystallization from amorphous alloys. By using this method, a Ni-P alloy with 9 nm crystallites was synthesized. The structure and grain sizes of the alloy were examined by means of x-ray diffraction, transmission electron microscopy, and high resolution electron microscopy. Specific heat capacity and thermal expansion coefficient of the nanocrystalline Ni-P alloy prepared by this method were found to be greater than those of the coarse-grained crystalline alloy by 12.3% and 56.2%, respectively. A new micromechanism for nanometer-sized crystallites formation is discussed.
关键词:
sized crystalline materials
