In that month studies were performed for the aluminum alloy containing zirconium (Al-Zr) with the transmission electron microscope (STEM, HR, analysis phase). Specimens as pre-prepared thin films have been cut from a piece of alloy Al-Zr. The aim was to examine the correctness the heat treatment and the structure of the initial material. TEM studies revealed the existence in the material very small particles of Al3Zr uniformly distributed in the grains.