Mechanical and ablation properties of laminated ZrB2–SiC/BN ceramics

Strong and tough ZrB2 materials using a heterogeneous ceramic–metal layered architecture

“…Thus, the capacity to undergo repeated load bearing and flow tolerance improve the fracture toughness of the ZrB 2 -SiC w /Ti materials. The relationship between flexural strength and fracture toughness for the materials prepared herein as well as those from previous studies 5, [25][26][27][28][29][30] showed that the prepared materials have superior properties (Figure 4). The materials compared include monolithic ZrB 2 -based ceramics toughened by whiskers, 17 short fiber, 29 and ductile metal, 28 or laminated ZrB 2 -SiC ceramics toughened by a weak ceramic interlayer (BN or graphite).…”

“…The relationship between flexural strength and fracture toughness for the materials prepared herein as well as those from previous studies showed that the prepared materials have superior properties (Figure ). The materials compared include monolithic ZrB 2 ‐based ceramics toughened by whiskers, short fiber, and ductile metal, or laminated ZrB 2 ‐SiC ceramics toughened by a weak ceramic interlayer (BN or graphite) . Of note, despite various multilayered ceramics having been developed, few studies have focused on the use of metals as the interlayer.…”

“…The materials compared include monolithic ZrB 2 -based ceramics toughened by whiskers, 17 short fiber, 29 and ductile metal, 28 or laminated ZrB 2 -SiC ceramics toughened by a weak ceramic interlayer (BN or graphite). 27,30 Of note, despite various multilayered ceramics having been developed, few studies have focused on the use of metals as the interlayer. Therefore, the striking results presented herein will provide a new research pathway for laminated ceramics.…”

Experimental Investigations into the Pyrolysis Mechanism and Composition of Ceramic Precursors Containing Boron and Nitrides with Different Boron Contents

“…According to the extensive literature reports [ 6 , 16 , 17 ], the existence of boron atoms also endows the ceramic materials with excellent thermal conductivity (60–120 W/Mk), low electrical resistivity (9–33 μΩcm), and high elastic modulus (250–560 GPa). Xiang et al [ 18 ] investigated the ablation behavior of ZrB 2 -SiC/BN ceramics, and the results showed that boride ceramics exhibited excellent ablation resistance and configuration stability. Zhang et al [ 19 ] reported the ablation behavior of hot-pressed ZrB 2 –20 vol% SiC using arc-jet testing with heat fluxes of 1.7 mW/M 2 and 5.4 mW/m 2 under different heating temperatures.…”