Effect of SiC:B ₄ C Ratio on the Properties of Si‐Cu/SiC/B ₄ C Composites

Investigation of Microstructural Features and Mechanical Characteristics of the Pressureless Sintered B4C/C(Graphite) Composites and the B4C-SiC-Si Composites Fabricated by the Silicon Infiltration Process

“…Because the pressureless sintered B 4 C/C(graphite) composites have a porosity of about 25-38%, the liquid silicon could be conveniently infiltrated into the interior of the composites [11][12][13][14][15][16][17][18][19][20], subsequently reacting with B 4 C and graphite to produce the silicon carbide [20][21][22][23][24][25][26][27][28][29][30]. While the boron carbide reacted only partially [30][31][32][33][34][35][36][37][38][39][40], the graphite reacted completely with silicon producing silicon carbide [40][41][42][43][44][45][46][47][48][49][50]. The residual boron carbide and silicon existed within the matrix of the composite [40][41][42][43]…”

Microstructural Characteristics of Reaction‐Bonded B4C/SiC Composite

“…Reaction-bonded B4C/SiC ceramic composites were fabricated by infiltrating molten Si into a preheated preform consisting of B4C, α-SiC and C to form a composite of near theoretical density [1]. The 10-15 vol% residual Si, together with other newly formed phases, bond the preexisting B4C and α-SiC to produce a cohesive solid of advanced properties, including light weight (~2.8 g/cm 3 ), high thermal stability, and corrosion resistance, in addition to high mechanical properties such as Young's modulus (~420 GPa) [2,3], resulting in applications for armor, thermal management, wear, and precision equipment.…”