Abstract
The purpose of this work is to optimize the feed containing alumina-binder nanoparticles for ceramics injection molding to create transparent alumina parts. In this research, two Alumina with and without MgO as sintering aid fabricated via the spark plasma sintering method. Feed fluidity, fracture toughness, density, IR, and visible transmission of SPSed bodies of the sintered pieces were measured. Furthermore, a pin on the disc test was used on the disk to examine the alumina friction coefficient. The results of feed rheology showed that the sample prepared at 90°C had the best conditions as a pseudo-plastic fluid for the CIM method. The results showed that a combination of CIM and SPS methods causes more visible transmission than conventional SPS of alumina nanopowder. Also, the fracture toughness and hardness of as-obtained transparent alumina were in the range of 3.6 MPam0.5 and 20.1 MPa, respectively. The wear rate of the as-obtained transparent sample (4.5 × 10−7 mm3/N.m) was proportional to the alumina grain size (1-4 μm). This article is protected by copyright. All rights reserved
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