Longer‐lasting Al₂O₃‐SiC_w‐TiC cutting tools obtained by spark plasma sintering

Abstract

In this work, an electrically conductive powder mixture of alumina, silicon carbide whiskers, and titanium carbide has been used to obtain cutting tools with a standard SNGN geometry after machining spark plasma sintered disks with 150 mm in diameter and 10 mm height. The obtained cutting inserts from the sintered blanks were used in real conditions in order to make a wear study of this composition compared to the alumina‐silicon carbide whiskers inserts available in the market. In parallel, pin on disk wear studies were performed. Results are discussed in terms of the different properties and microstructural features of the different ceramic composites.

Processing and Characterization of Spark Plasma Sintered SiC-TiB2-TiC Powders

“…In spark plasma sintering, heating is achieved by passing a pulsed DC electrical current through the matrix when the sample is nonconductive or through the sample when it is conductive. This gives the SPS method certain advantages, such as high heating rates (from 100 °C/min to 1000 °C/min) that permit faster densification, which allows sintering at lower temperatures and also with very short cycles, reducing grain growth [ 56 , 57 , 58 , 59 , 60 ]. Moreover, the possibility of applying external pressure during the sintering process makes it possible to carry out the consolidation of poorly sinterable ceramics in very short times, producing materials with better mechanical properties [ 61 , 62 ].…”

Green and microwave synthesis of SrAl2O4 nanoparticles by application of pomegranate juice: study and characterization

“…They have the ability to adsorb sunshine and store its energy, and afterwards release the saved solar energy as observable light. So, they can have afterglow for a long time in the dark environment (Wang et al 2015;Gutiérrez-González et al 2017). These unique features have attracted extensive attentions because of their wide utilizations in various fields such as warning marks, textile industry, dial plates of glowing watch, automobile components, ship and other apparatus (Chen et al 2012).…”