MoSi2 particle reinforced-SiC and Si3N4 matrix composites

High-temperature mechanical behavior of carbon–silicide–carbide composites developed by alloyed melt infiltration

“…11 It shows significant metal-like ductility at high temperatures due to its brittle-to-ductile transition around 900-1000 • C. It is believed that MoSi 2 can improve the fracture toughness of the infiltrated SiC materials. [12][13][14] However, temperatures of at least 2100 • C are necessary to infiltrate a material with this substance. This melting temperature can be reduced by addition of silicon and other substances, such as titanium, which has been proven earlier as a suitable choice, regarding high-temperature and oxidation behavior of the composite.…”

MoSi2–Si3N4 composites: Influence of starting materials and fabrication route on electrical and mechanical properties

“…The need for improving fracture toughness, high temperature and electrical properties, and machinability of Si 3 N 4 -based materials has led to the recent development of MoSi 2 -particle reinforced-Si 3 N 4 composites. [1][2][3][4][5][6][7][8][9][10][11][12][13][14] The combination of Si 3 N 4 and MoSi 2 gives MoSi 2 -Si 3 N 4 composite materials with desirable mechanical properties and good electrical conductivity. The intermetallic compound MoSi 2 has long been known as a high temperature material that has excellent oxidation resistance and electrical conductivity (2 × 10 5 −1 cm −1 at room temperature).…”

Development of a high temperature Cf/XSi2–SiC (X=Mo, Ti) composite via reactive melt infiltration

“…Therefore it is believed that MoSi 2 can improve the fracture toughness of the infiltrated SiC material. 17 In this case the crack deviation mechanism at the SiC-MoSi 2 interface is said to be dominant. 18,19 It is also reported that there is a good thermodynamic compatibility between SiC and MoSi 2 .…”