DESCRIBE THE EFFECT OF HIGH TEMPERATURES ON CERTAIN GENERAL PROPERTIES OF THE COMPOUND (MGO-NI) AT HIGH TEMPERATURES

Objective: In this research, the ceramic compound MgO-Ni was prepared and studied by the self-sintering method, with the study focusing on the effect of high temperatures on the crystal structure and some general properties. Method: In this research, the ceramic compound MgO-Ni was prepared and studied by the self-sintering method, with the study focusing on the effect of high temperatures on the crystal structure and some general properties. Results: The results obtained yielded important conclusions, as the scanning electron microscope image showed that the prepared compound possesses a homogeneous, microscopic crystalline structure. This is consistent with the X-ray diffraction analysis, which shows a regular grain distribution and the absence of cracks. This reflects the efficiency of the preparation and calcination methods. Furthermore, the scanning electron microscope (SEM) images showed that the grain size increases with rising temperatures. This behaviour is attributed to improved atomic diffusion, which is an excellent finding from an applied perspective. Furthermore, the mechanical results of the compound showed a marked improvement with increasing temperature, which is attributed to a decrease in porosity and an increase in intergranular cohesion. The increase in the magnesium oxide content also provided a significant basis for enhancing the compound's hardness, thanks to its hard ceramic nature. Additionally, the nickel mineral phase contributed to strengthening the structural bond and reducing the collapse of the h s, likewise, the compressive strength showed a marked increase, which indicates the stability of the composite's mechanical behaviour. Novelty: Finally, it can be concluded that the calcination temperature is a key factor in controlling the microstructure and improving the mechanical and physical properties of the composite without the need to alter its chemical composition. The results confirm that the prepared composite possesses high structural stability and excellent mechanical and thermal performance. making it suitable for engineering applications that require high-hardness materials.