The influence of metal phase composition on microstructure and mechanical properties of Al2O3-Cu-Cr ceramic metal composites

Abstract

Ceramic metal composites from the ternary Al 2 O 3-Cu-Cr system were fabricated with the use of the slip casting method. Densities of the obtained composites with 15 vol.% of metal content and different percentage composition of Cu and Cr were examined by the Archimedes method. The samples' microstructures, observed by scanning electron microscope, were analysed with image analysis program in order to determine size distribution of the metallic areas in the structure. Phase composition of the sintered samples was examined by X-ray diffraction analysis. Vickers hardness of the samples was tested along with their fracture toughness with the use of the Vickers indentation technique. The conducted research revealed the correlation between the microstructure and mechanical properties of the obtained specimens. It has demonstrated the possibility of manufacturing composites from ternary system with the use of the slip casting method. It was revealed that the addition of the chromium particles to the metallic phase enhances hardness of the composites. Also, the metallic phase composition of the samples affects mechanism of the crack propagation in the material. Although the mechanical properties have been improved, it was found that the density of the samples was not satisfying and the need for further analysis has been identified.

Comparison of Additively Manufactured Polymer-Ceramic Parts Obtained via Different Technologies

“…In most cases, ceramic AM materials are available in the form of composites consisting of ceramic particles and an organic, polymeric matrix [ 8 ]. To obtain fully ceramic parts, the printed components need to be subjected to additional processing, including extraction, in which the polymer is removed through rinsing, and finally by high-temperature sintering [ 9 , 10 , 11 ].…”

Microstructure and Phase Evolution of Ti-Al-C-Nb Composites Prepared by In Situ Selective Laser Forming

“…Metal-ceramic composites integrate the advantages of each component, and they have potential application prospects in the fields of aerospace, industrial metallurgy, and machinery [1][2][3]. In the last few decades, Ti-Al-C composites, which contain the TiAl 3 phase and TiC particles, have aroused great interest in the above fields, due to their excellent hardness, thermal stability, good wear resistance, and corrosion resistance [4,5].…”