Toughness‐Hardness Trade‐Off in Advanced SiC Armor

Flinders, Marc; Ray, Darin; Cutler, Raymond A.

doi:10.1002/9781118406793.ch3

Cited by 6 publications

(2 citation statements)

References 14 publications

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“…Due to their extremely brittle nature, most ceramics possess an inverse relationship between hardness and toughness [19,54,55]. To examine this behavior for the ceramics investigated in this study, a plot of Vickers hardness versus fracture toughness is generated in Fig.…”

Section: Discussionmentioning

confidence: 99%

The rate-dependent fracture toughness of silicon carbide- and boron carbide-based ceramics

Pittari

Subhash

Zheng

et al. 2015

Journal of the European Ceramic Society

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Section: Discussionmentioning

confidence: 99%

The rate-dependent fracture toughness of silicon carbide- and boron carbide-based ceramics

Pittari

Subhash

Zheng

et al. 2015

Journal of the European Ceramic Society

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“…Table 2 Materials commonly used for armour application and their corresponding mechanical properties. [16,[18][19][20][21][22][23][24][25][26][27] Table 3 Possible atomic arrangements boron and carbon atoms in boron carbide crystals. [44] .... Table 4 Manufacturing processes for ceramic armour.…”

Section: Figure 39mentioning

confidence: 99%

Synthesis and spark plasma sintering of nano-structured ceramic materials for armour application

Xie¹

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The use of extremely high hardness and light weight ceramic-based materials against ballistic threat is gaining popularity over the recent years. However, ceramics materials are often susceptible to tensile cracking and fragmentation due to its inherent brittleness which affects its performance as a protective material. On the other hand, high fracture toughness is highly desirable to minimise the fragmentation on impact but hardness and toughness tend to be mutually exclusive in most materials. Researches on complex structured bio-composites have shown that their outstanding mechanical properties could even exceed that of its constituent materials. Therefore, this leads to new field of research into biomimetic materials to produce a new class of complex hierarchical structure superhard composite with advanced toughening mechanisms. In the current research, various form of superhard nanostructured crystals of boron carbide, B 4 C, (nano-particles, nanowires, nano-ribbons and nano-flakes) and boron suboxide, B 6 O, (star-shaped nano-plate) have been synthesized as potential basic building block for assembling into such complex structured material. Spark Plasma Sintering (SPS) is a novel powder consolidation process that utilises pulse current to achieve rapid densification at a relatively lower temperature than traditional sintering techniques. These reasons make SPS suitable for the consolidation of nano-structured materials that could minimise grain growth during sintering process and also retain the initial structure of the material. SPS was used in the consolidation of synthesized B 6 O nano-plates.

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