Textured Ti₃SiC₂ by gelcasting in a strong magnetic field

Abstract

We present a novel application of gelcasting in a strong magnetic field for texture development in the ternary MAX phase carbideTi 3 SiC 2 . The applicability of a low-toxic and water soluble monomer-glycerol monoacrylate for gelcasting Ti 3 SiC 2 has been shown. Textured green bodies of Ti 3 SiC 2 with a,b-axis oriented along the direction parallel to the applied magnetic field could be fabricated. The relative green density was found to increase from 34 to 58% with increasing solid-loading (30 to 55 vol %) of the suspension but at the cost of the degree of orientation. The Lotgering's orientation factor-f L(00l) -on the textured top surfaces varied from 0.81 to 0.2 as the solid-loading increased from 30 to 55 vol %.

Si‐rich pressureless sintering of the gelcasted Ti3SiC2 bulk ceramic

“…Zeta potentials of Ti 3 SiC 2 particles using PAA‐NH 4 as a dispersant are shown in Figure 2. The IEP of Ti 3 SiC 2 was measured to be 5.0 without a dispersant, which concurs well with the literature reports 28,43,44 . Even a small dosage of dispersant (0.5 wt%) moved the IEP from 5.0 to 3.6.…”

“…However, few studies investigated the gelcasting of Ti 3 SiC 2 or other MAX phases. In order to explore the texture development in Ti 3 SiC 2 , Mishra et al 28 gelcasted textured Ti 3 SiC 2 green body with the Loitering's orientation factor in the range of 0.2 to 0.81 in a strong magnetic field. Idzkowska et al 29 investigated the effects of five different dispersants on the deflocculation and stabilization of Ti 3 SiC 2 suspensions.…”

Preparation and anisotropic properties of textured structural ceramics: A review

“…MAX phases can be synthesized by solid reaction of powders of M, A, and X elements. The synthetic MAX phases are ball milled to form fine plate-like powders, and then textured MAX phase ceramics are prepared by hot working or magnetic alignment [262][263][264][265][266][267]. Some MAX phases can be oriented with the c-axis parallel to the magnetic field direction but some may be opposite.…”

Fabrication and Mechanical Properties of Textured Ti₃SiC₂ Systems Using Commercial Powder

“…10) The template method and hot forging method are methods of preparing textured bulk ceramics. Recently our group has proposed colloidal processing such as by slip-casting, 11,12) gel-casting, 13,14) tape-casting and electrophoretic deposition (EPD) 15,16) under a strong magnetic field (MF). When the crystal structure of a particle is non-cubic, the magnetic susceptibility is different in the a, b and c directions.…”