Ca-ATZ/Ca-ATZ+SiO₂ functionally graded ceramic

Abstract

The paper studies the structural features, phase composition and complex mechanical properties of two-layer composite ceramics based on alumina-toughened zirconia with silica added (Ca-ATZ/Ca-ATZ+SiO 2 ). The ceramics under study were manufactured using a costeffective technology involving grinding and mixing powders, layering of powder mixtures (different compositions), uniaxial pressing and two-stage sintering. It was found that at the interface of the compositions, there is an abrupt increase in fracture toughness (by 33%) and a decrease in hardness and Young's modulus (by 8% and 7%, respectively). The possibility of manufacturing composite ceramics Ca-ATZ+SiO 2 (with a thin surface layer, not containing SiO 2 ) with a high ratio of hardness (not lower than 14 GPa) and fracture toughness (not lower than 12 MPa m 1/2 ) was shown. Given the increased resistance to lowtemperature degradation of the developed ceramics, this will increase the service life of products operated under high mechanical loads in a humid atmosphere.

Optimization of Pin Type Single Screw Mixer for Fabrication of Functionally Graded Materials

“…FGMs are characterized by their material compositions varying spatially through customized gradients, leading to exceptionally satisfactory histocompatibility. This strategic composition mitigates the issue of abrupt interfaces between materials, thus enabling the full exploitation of the inherent potential of each material [3][4][5]. Specifically, ceramic-based FGMs, when integrated with flexibility-oriented additive manufacturing processes, are becoming increasingly crucial in a variety of critical fields, including military [6][7][8], bioengineering [9][10][11][12], energy [13,14], and aerospace [15][16][17][18].…”