Influence of resin content and compaction pressure on the mechanical properties of SiC–Si composites with sub-micron SiC microstructures

Densification and Microstructural Evolutions during Reaction Sintering of SiC-Si-C Powder Compacts

“…Additionally, the mechanical properties, for example, strength, modulus of elasticity, and fracture toughness deteriorate due to increasing the amount of residual silicon phase especially at high temperatures [13][14][15]. Some studies [12,16] have been performed in order to reduce the free silicon content in SiC-Si ceramics and enhance the mechanical properties. For instance, Blecha et al [16] have suggested using SiC powders with different particle sizes.…”

“…Residual pores and space not occupied by silicon carbide are filled with liquid silicon. It is well known [11,12] that one limiting factor to obtain SiC parts with high strength is the amount of free silicon in the composites since the brittle free silicon phase and interfaces between SiC and Si are preferential paths for fracture.…”

The rate-dependent fracture toughness of silicon carbide- and boron carbide-based ceramics

“…The inclusion of glassy [1] or metallic [19] secondary phases has been shown to decrease the brittleness and increase the fracture toughness value of ceramics. Newer processing techniques, such as reaction bonding, have been used to manufacture ceramics with increased fracture toughness while minimally compromising other material properties, such as density and hardness, compared to similar sintered ceramics [20][21][22][23][24][25]. In this study, a variety of reaction-bonded ceramic composites are compared to several pressureless-sintered ceramics to investigate the effect of microstructure on the fracture toughness value.…”

Fabrication and properties of reaction-formed SiC by infiltrating molten Si into mesocarbon microbeads-based carbon preform

“…Reactive melt infiltration (RMI), or called liquid silicon infiltration (LSI) process, is an attractive method for fabricating silicon carbide ceramics due to its lower processing temperature, shorter time and near-net shape fabrication capability [1][2][3][4][5][6][7][8][9][10]. The process involves following steps: fabrication of porous carbon preforms, infiltration with liquid silicon and chemical reaction to form silicon carbide ceramics [3,8].…”