Sintering Behavior, Microstructure, and Mechanical Properties: A Comparison among Pressureless Sintered Ultra-Refractory Carbides

Figure 8

(a) Fractured and (b)–(d) polished section of TC20. The bright phase is TaC, the dark phase is MoSi₂, and the arrow in (c) indicates the reaction product formed during sintering, identified as (Ta,Mo)₅Si₃. (d) MoSi₂ phase squeezed among the matrix and, circled, the triple point junctions constituted by (Ta,Mo)₅Si₂C.

(a)

(b)

(c)

(d)