The Influence of Wire Electrical Discharge Machining Cutting Parameters on the Surface Roughness and Flexural Strength of ZrO2/TiN Ceramic Nanocomposites Obtained by Spark Plasma Sintering

Abstract

In this work, we characterized the mechanical and electrical properties of zirconia-based ceramic nanocomposites reinforced with 30 and 40 vol. % TiN and fabricated by spark plasma sintering. In addition to their improved mechanical performance, these compositions have sufficient electrical conductivity to allow wire electrical discharge machining (WEDM). The influence of WEDM variables on the roughness and the mechanical strength of samples was analyzed after each cut. The experimental results showed that the roughness of machined surfaces can be reduced by variations in WEDM manufacturing regimes, and, consequently, a drastic drop in flexural strength of workpieces can be avoided. Furthermore, the composites with higher content and homogeneous distribution of the conductive phase exhibited better surface quality as well.

Effect of Milling Conditions on the Microstructural Design in Aluminum Based Alloy Fabricated by SPS

“…The heat generated at the point contacts of the powder particles presents a surface treatment effect on the particle surfaces, removing contaminants and breaking the characteristic oxide layer on the aluminum powders before local welding or neck formation. This results in cleaner particle surfaces, an increase in the densification of the powders and an obvious comparative improvement in the properties of the resulting composites [14][15][16][17][18]. Additionally, the high heating rate-up to 1000 • C/min-allows significantly improved densification kinetics with lower time and temperature compared to those required for conventional sintering processes Multicomponent cast aluminum alloys with enhanced mechanical and tribological properties, as compared to Al-Sn and bronze alloys, were recently developed as candidates for monometallic journal bearings in the engine [19][20][21][22][23].…”

The Role of the Activator Additives Introduction Method in the Cold Sintering Process of ZnO Ceramics: CSP/SPS Approach

“…In recent decades, significant progress in the evolution of promising new sintering methods has been made. For example, certain methods, such as FLASH sintering [1], spark plasma sintering (SPS) technologies [2][3][4], modified SPS [5], and cold sintering processes [6] have been developed. Common to all these new approaches is the emphasis on reducing the sintering time and temperature, and this can be considered as an advantage that favors a reduction in energy consumption [7] and consequently the emission of CO 2 into the atmosphere [8], which is one of the great problems for the planet.…”

Zirconia Reduced Graphene Oxide Nano-Hybrid Structure Fabricated by the Hydrothermal Reaction Method

“…Recently, zirconia ceramics (ZrO 2 ) have received significant attention from the scientific circles as a potential material for various structural applications, because of their high mechanical characteristics, physical and chemical wear, and thermal stability coupled with corrosion resistance and zero toxicity [12][13][14][15][16][17][18][19][20][21][22]. Enhancing in mechanical performance and effective control on electrical and thermal properties is a need in order for the possible future large-scale application of ZrO 2 .…”