Effect of MgO Addition on the Mechanical and Dynamic Properties of Zirconia Toughened Alumina (ZTA) Ceramics

Abstract

Zirconia toughened alumina (ZTA) is a promising advanced ceramic material for a wide range of applications that are subjected to dynamic loading. Therefore, the investigation of dynamic compressive strength, fracture toughness and hardness is essential for ZTA ceramics. However, the relationship between these mechanical properties in ZTA has not yet been established. An example of this relationship is demonstrated using ZTA samples added with MgO prepared through conventional sintering. The microstructure and mechanical properties of ZTA composites were characterized. The hardness of ZTA composites increased for ≤0.7 wt.% MgO due to the pinning effect of MgO and decrease of the porosity in the microstructure. Oppositely, the fracture toughness of ZTA composites continuously decreased due to the size reduction of Al2O3 grains. This is the main reason of deteriorate of dynamic compressive strength more than 0.2 wt.% of MgO addition. Therefore, the SHPB test shows the improvement of the dynamic compressive strength only up to a tiny amount (0.2 wt.% of MgO addition) into ZTA ceramics.

Compression Performance and Abrasive Wear Resistance of CuNi‐Modified Zirconium Oxide‐Toughened Alumina Particles‐Reinforced Iron Matrix Composites

“…Due to its superior bending strength and fracture toughness, zirconium oxide‐toughened alumina (ZTA) has been considered to be a suitable reinforcement for the iron matrix composites. [ 1 ] Compared with white cast iron, high‐chromium cast iron (HCCI) has high erosion resistance and appropriate hardness as well as toughness. [ 2 ] Therefore, ZTA particles‐reinforced HCCI matrix composite (ZTA p /HCCI) has been widely used in many important industrial fields, such as coal mines, metallurgy, construction, and transportation, owing to their lower fabrication cost, high specific strength, and excellent abrasive wear.…”

Fabrication and Static Bending Properties of 3D Printed Zirconia Part via Digital Light Processing Method

“…Ceramic materials are widely used in biomedical engineering, chemical industry and aerospace because of their excellent biocompatibility, wear resistance, heat resistance and corrosion resistance [1]. However, traditional manufacturing technology (gel casting, slip casting, dry pressing, injection molding, tape casting, and so on) is challenging to make ceramic materials into sophisticated shapes.…”

“…As a result, it cannot take full advantage of their outstanding characteristics. In addition, there are particular issues in the conventional processes [2]: (1) The shaping process of complex parts highly depends on the mold; (2) Sintered bodies often need additional mechanical post-processing; (3) Certain unique shapes (e.g., inner cavities/pores/groove) are difficult to generate using traditional ways. Recently, it has been of great interest to use the Additive Manufacturing (AM, also known as 3D printing) [3] technique in the ceramic industry to sidestep the issues mentioned above and could save up 80% of the fabrication cost of the ceramic parts [4].…”

Correlations between Process Parameters and Outcome Properties of Laser-Sintered Polyamide

“…Also, the orientation of the parts in the building chamber was taken into consideration. The fracture properties of PLA samples were determined according to part orientation by Ahmed and Susmel [23], while metallic materials produced by laser melting were studied by Razavi and Berto [24] and Solberg et al [25] and on ceramics by Arab et al [26]. In their work, the fracture toughness was determined using a significant number of samples.…”