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Wear-mechanical properties of filler-added liquid silicon infiltration C/C–SiC composites

2012; Elsevier BV; Volume: 44; Linguagem: Inglês

10.1016/j.matdes.2012.07.064

0261-3069

Seyoung Kim, In Sub Han, Sang Kuk Woo, Kee Sung Lee, Do Kyung Kim,

Aluminum Alloys Composites Properties

Abstract A carbon fiber reinforced silicon carbide matrix (C/C–SiC) composites material was manufactured by introducing a filler into the liquid silicon infiltration (LSI) process. The filler consisted of Si:Carbon black = 1:1 mixed with a phenol resin. Use of the filler resulted in a negligible reduction in the residual free Si of approximately 0.7% but increased 15% of reacted SiC amount. Dilatometer and X-ray diffraction (XRD) evaluations also confirmed improved formation of reaction-bonded silicon carbide (SiC) in the matrix. The wear rate was decreased more than 2.5-fold, indicating significantly improved wear-resistance properties. However, flexural strength gradually decreased and fiber damage was observed in fracture surface with increases in filler content.