High‐strength TiB₂‐B₄C composite ceramics sintered by spark plasma sintering

Abstract

Spark plasma sintering (SPS) is an advanced sintering technique because of its fast sintering speed and short dwelling time. In this study, TiB2, Y2O3, Al2O3, and different contents of B4C were used as the raw materials to synthesize TiB2‐B4C composites ceramics at 1850°C under a uniaxial loading of 48 MPa for 10 min via SPS in vacuum. The influence of different B4C content on the microstructure and mechanical properties of TiB2‐B4C composites ceramics are explored. The experimental results show that TiB2‐B4C composite ceramic achieves relatively good comprehensive properties and exceptionally excellent flexural strength when the addition amount of B4C reaches 10 wt.%. Its relative density, Vickers hardness, fracture toughness, and flexural strength reach to 99.20%, 24.65 ± .66 GPa, 3.16 MPa·m1/2, 730.65 ± 74.11 MPa, respectively.

Integrated preparation of B4C–TiB2 multilayer graded ceramics with high hardness and high toughness

“…Boron carbide (B 4 C) possesses desirable properties, such as low density, high hardness, and excellent wear resistance 6–8 . Titanium diboride (TiB 2 ) demonstrates exceptional mechanical properties, including high fracture toughness, relatively low density, excellent chemical stability, and a high modulus of elasticity 9–18 . B 4 C and TiB 2 are widely used in aerospace, wear components, cutting tools and lightweight protective materials because of their exceptional properties 19–25 .…”

Dynamic response of the TiB2–SiC/B4C composite ceramic under dynamic loading

“…Monolithic B 4 C material has difficulty meeting the demand for protective performance, so composite ceramic materials have been widely utilized in the exploitation of armor materials. [5][6][7] TiB 2 and SiC are the most widely used second phases due to their excellent strength and toughness, relatively low density, and good ballistic properties, which can significantly improve the comprehensive properties of B 4 C ceramics. Therefore, TiB 2 -SiC/B 4 C composite ceramic is a candidate material for armor production.…”

“…However, B 4 C ceramic has significant downsides: The flexural strength and fracture toughness are relatively low, which can limit its widespread application in the armor protection field. Monolithic B 4 C material has difficulty meeting the demand for protective performance, so composite ceramic materials have been widely utilized in the exploitation of armor materials 5–7 . TiB 2 and SiC are the most widely used second phases due to their excellent strength and toughness, relatively low density, and good ballistic properties, which can significantly improve the comprehensive properties of B 4 C ceramics.…”