The effect of different sintering additives on the electrical and oxidation properties of Si3N4–MoSi2 composites

Investigation of CrSi2 and MoSi2 as anode materials for lithium-ion batteries

“…According to Huggins, the expected capacities are 764, 647, and 749 mAh g −1 , respectively. The lower capacities could not be attributed to poor electronic conductivity as it is reported that MoSi 2 is a good electrical conductor of 3.5 × 10 4 S cm −1 [22,23] but most probably to poor ionic conductivity as it is also possible that the lithium diffusion coefficient is very low at R.T. Another possibility is that MoSi 2 might not be very reactive towards lithium, as pointed out by Dahn et al for most silicides [9]. Fig.…”

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

“…However, thermodynamic calculation of the reaction (1) performed in Ref. 13 indicates that at 0.1 MPa, the Gibbs free energy change G • is negative at temperatures below 1715 • C. This calculation shows that the reaction (1) may proceed towards the right-hand side and form Mo 5 Si 3 and Si 3 N 4 . Note that in both sintering atmospheres no crystalline grain boundary phases were observed as shown in Fig.…”

“…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).…”

“…However, only limited data on the electrical conductivity of MoSi 2 -Si 3 N 4 composites dependence on grain size of conductive phase is available in the literature. 8,13 In the present study the fabrication, mechanical and electrical properties of MoSi 2 -Si 3 N 4 composite materials were investigated. Commercially available individual compounds, one-stage combustion synthesized MoSi 2 -Si 3 N 4 and different MoSi 2 powders were used as starting materials.…”

Multi-scale electrical response of silicon nitride/multi-walled carbon nanotubes composites

“…The full potentiality of these materials is only partially achieved by the difficulty inherent to their machining. Recent works [2,3] have shown the possibility of the efficient electric discharge machining (EDM) for Si 3 N 4 materials when adding an electric conductive second phase, such as TiN [2] or MoSi 2 [3]. The amount of such second phases required to get a reasonable reduction in resistivity was around 30…”