Mechanical properties of ZrB2–SiC(ZrSi2) ceramics

High‐temperature mechanical behavior of ZrB2‐based composites with micrometer‐ and nano‐sized SiC particles

“…. For comparison, previously reported data for ZrB 2 ‐SiC is shown in Figure . The high‐temperature strengths of ZSN20 and ZSM20 are greater than those reported previously in the literature.…”

Mechanical Properties of Zirconium‐Diboride Based UHTCs

“…The strength steadily decreased to 245 MPa at 1800°C and decreased more rapidly to 115 MPa at 2000°C. Grigoriev [15] measured the strength of a ZrB 2 -19 vol% SiC composite in air (not shown), reporting a room-temperature strength of 500 MPa that was maintained up to 1200°C, decreasing to 430 MPa at 1400°C. Zou et al [90,91] have reported the three-point bend strengths at elevated temperature for several compositions up to 1600°C in argon.…”

“…figure 8.14. elevated-temperature flexure strength of selected hot-pressed Zrb 2 -sic ceramics with various additives in argon[11,15,25,67].ceramics, finding that the strength decreased only slightly from 570 MPa at room temperature to 490 MPa at 1500°C. Bellosi et al[67] reported properties for a spark-plasma-sintered ZrB 2 -15MoSi 2 ceramic, finding that the strength remained approximately 635 MPa from room temperature up to 1200°C, before decreasing to 360 MPa at 1600°C.…”

Processing Low‐Oxide ZrB2 Ceramics with High Strength Using Boron Carbide and Spark Plasma Sintering

“…Owing to the bonding characteristics, ZrB 2 offers desirable properties—low density (6.09 g/cm 3 ), high strengths for mechanical stability, and high thermal and electrical conductivities—that are attractive for advanced UHTC composites . However, high‐temperature mechanical properties of ZrB 2 ‐based composites are highly dependent on impurity content of the matrix material, specific to the oxides, limiting application at temperature . Grain‐boundary oxides have been shown to have a greater influence on limiting strength retention at high temperatures over ceramics with small grains .…”