Local temperatures in mechanical alloying – POSTER

Jeníček Jan - University of Chemistry and Technology (Czech Republic)

Mechanical alloying is a processing technique that enables the production of fine-grained and homogeneous alloys, even from elements that cannot be combined using conventional casting methods. The process involves high-energy milling of powder mixtures, during which repeated plastic deformation, fragmentation, and cold welding of particles occur. This method has found applications in the development of nanocrystalline and amorphous materials, high-entropy alloys, and biomedical materials.

One of the critical factors in mechanical alloying is the temperature generated during the milling process. While several theoretical studies have attempted to estimate these temperatures, experimental investigations have mainly focused on measuring the temperature of the milling container, grinding media, or reference capsules. However, local temperatures of the milled material itself remain a key area of interest, particularly for understanding the formation of intermetallic phases.

This work explores the possibility of assessing the temperatures reached during mechanical alloying by examining the decomposition of selected inorganic salts. The salts are milled under specific conditions, and their final composition is analyzed using X-ray diffraction (XRD). Additionally, the influence of metallic elements on the alloying process is investigated, including tribological tests to evaluate their effect.