Fabrication and Mechanical Properties of Textured Ti₃SiC₂ Systems Using Commercial Powder

Abstract

Ti 3 SiC 2 is a typical M n+1 AX n (MAX) phase ceramic and exhibits both metal-like and ceramic-like properties. To improve these properties, texturing and Al 2 O 3 addition were performed. The commercial Ti 3 SiC 2 powder used contained approximately 10 mass% TiC phase. Textured Ti 3 SiC 2 was prepared by slip casting in a strong magnetic field (MF) followed by spark plasma sintering (SPS) at 1623 K under a pressure of 40 MPa for 5 min. The Lotgering orientation factor of the (00l) peaks of Ti 3 SiC 2 prepared under an MF was 0.96, and the relative density of samples exceeded 99%. The bending strength and fracture toughness of Ti 3 SiC 2 were improved by texturing. The textured Ti 3 SiC 2 exhibited an excellent bending strength of 978 MPa, but Al 2 O 3 addition, reduced the bending strength and fracture toughness. The textured Ti 3 SiC 2 showed the plastic deformation at a temperature of approximately 1173 K.

Magnetic slip casting for dense and textured ceramics: A review of current achievements and issues

“…To allow for large area scanning, X ray diffraction (XRD) in diffractometers can probe mm dimensions and with a penetration depth of a few hundreds of micrometers. XRD can be carried out using the 𝜃 − 2𝜃 scan method as in powder diffraction [73,74,79,99,110] or using the rocking curve method where only the diffraction around one preferential axis is recorded by tilting the sample [113].…”

Orientation Dependence of Plastic Deformation Behavior and Fracture Energy Absorption Mechanism around Vickers Indentation of Textured Ti₃SiC₂ Sintered Body

“…10(b) and (c), cracks occurred linearly without deflection in the left and right sides of the indent. Although it has generally been reported that the crack deflection by the interlayer and grain boundaries can improve the fracture toughness in Ti 3 SiC 2 19) the toughening mechanism did not work in 0TSC due to the texture.…”

“…To enhance its mechanical properties, Hu et al fabricated textured Ti 3 SiC 2 with a unidirectionally aligned c-axis by using commercial powder and slip casting in a strong magnetic field and spark plasma sintering (SPS). 18,19) Vickers hardness tests were conducted in directions parallel and perpendicular to the oriented c-axis. The tests conducted parallel with the c-axis showed that the indentation shape was isotropic, and that cracks occurred in four diagonal directions.…”

On the formation mechanisms and properties of MAX phases: A review

“…For textured bulk MAX phases, crack formation and propagation along layers (perpendicular to the c-axis orientation) requires breaking of the weak M-A bonds, which is much easier than fracture parallel to the c-axis orientation which requires breaking of the stronger M -X bonds and AA-bonds, leading to a higher flexural strength and fracture toughness along the c-axis orientation [22,23,165,167], as shown in Table 4.…”