Influence of the microstructure evolution of ZrO2 fiber on the fracture toughness of ZrB2–SiC nanocomposite ceramics

Wang, Shubin; Li, Yue; Zhang, Xinghong

doi:10.1016/j.matdes.2013.01.039

Cited by 24 publications

(6 citation statements)

References 28 publications

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“…Until now, many studies have been striving to explore ways to perfect the mechanical properties of Al 2 O 3 -based ceramics. Some methods have been proposed, such as whisker toughening, phase transformation, the particle dispersion, and synergistic effects by various reinforcing mechanisms [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Reinforcing Mechanisms of Graphene and Nano-TiC in Al2O3-Based Ceramic-Tool Materials

et al. 2020

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Graphene and nano-TiC, which have good reinforcing effects on Al2O3-based ceramic-tool materials, are generally used as additive phases for ceramics. In this study, nine kinds of samples were sintered, to investigate the effects of graphene and nano-TiC on the reinforcing mechanisms of Al2O3-based ceramics. The experimental results indicated that adding 0.5 vol% graphene and 10 vol% nano-TiC can obtain the optimum flexural strength, fracture toughness, and Vickers hardness, which were 705 ± 44 MPa, 7.4 ± 0.4 MPa m1/2, and 20.5 ± 0.8 GPa, respectively. Furthermore, the reinforcing mechanisms of crack bridging, pull-out of graphene, and pull-out of nano-TiC are identified, which are contributed to improving the mechanical properties of ceramics. Meanwhile, other reinforcing mechanisms induced by graphene (graphene break, crack guiding, and 3D propagation) and nano-TiC (crack branching, crack deflection, and peeling) are discussed. These reinforcing mechanisms are coupled together, while decoupling is hard to work out. Thus, further quantitative studies of reinforcing effects of graphene and nano-TiC on Al2O3-based ceramic-tool materials are necessary to be carried out.

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Section: Introductionmentioning

confidence: 99%

Reinforcing Mechanisms of Graphene and Nano-TiC in Al2O3-Based Ceramic-Tool Materials

et al. 2020

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“…ZrB 2 is an important high-temperature ceramic material because it possesses excellent properties of high melting point, thermal stability, chemical stability, and high thermal and electrical conductivities. − ZrB 2 ceramic proves to be an optimal candidate in the extremely thermal and chemical environments associated with hypersonic flight, rocket propulsion, and atmospheric re-entry. However, high brittleness and low toughness as well as poor damage tolerance have limited its widespread use as structural materials. , To obtain tough ZrB 2 ceramics, previous efforts toward improving fracture toughness have been devoted to incorporating particles, fibers, and whiskers of SiC or Si 3 N 4 into ceramic matrix. − These incorporated SiC or Si 3 N 4 ceramic particles can dissipate more energy during crack propagation at their interfaces by preventing grain coarsening . Moreover, the addition of SiC particles can improve the densification behavior and oxidation resistance .…”

Section: Introductionmentioning

confidence: 99%

Electrostatic Assembly Preparation of High-Toughness Zirconium Diboride-Based Ceramic Composites with Enhanced Thermal Shock Resistance Performance

Zhang

Hong

et al. 2016

ACS Appl. Mater. Interfaces

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The central problem of using ceramic as a structural material is its brittleness, which associated with rigid covalent or ionic bonds. Whiskers or fibers of strong ceramics such as silicon carbide (SiC) or silicon nitride (Si3N4) are widely embedded in a ceramic matrix to improve the strength and toughness. The incorporation of these insulating fillers can impede the thermal flow in ceramic matrix, thus decrease its thermal shock resistance that is required in some practical applications. Here we demonstrate that the toughness and thermal shock resistance of zirconium diboride (ZrB2)/SiC composites can be improved simultaneously by introducing graphene into composites via electrostatic assembly and subsequent sintering treatment. The incorporated graphene creates weak interfaces of grain boundaries (GBs) and optimal thermal conductance paths inside composites. In comparison to pristine ZrB2-SiC composites, the toughness of (2.0%) ZrB2-SiC/graphene composites exhibited a 61% increasing (from 4.3 to 6.93 MPa·m(1/2)) after spark plasma sintering (SPS); the retained strength after thermal shock increased as high as 74.8% at 400 °C and 304.4% at 500 °C. Present work presents an important guideline for producing high-toughness ceramic-based composites with enhanced thermal shock properties.

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“…As it is well-known, transition metal boron shows high hardness, high melting point and strong abrasion resistance characteristics. Therefore, hard nanocomposite films based on transition metal boron like TiB 2 [4][5][6], ZrB 2 [7][8][9][10][11] have been widely investigated. The previous research demonstrated that incorporation of other materials and microstructure control is a good way to improve the mechanical properties of transition metal boron films further.…”

Section: Introductionmentioning

confidence: 99%

Controllable substrate bias voltages effectively tailoring nanocomposite Nb–B–Al–O film properties

Liu

Dong

et al. 2015

Journal of Alloys and Compounds

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Influence of the microstructure evolution of ZrO2 fiber on the fracture toughness of ZrB2–SiC nanocomposite ceramics

Cited by 24 publications

References 28 publications

Reinforcing Mechanisms of Graphene and Nano-TiC in Al2O3-Based Ceramic-Tool Materials

Reinforcing Mechanisms of Graphene and Nano-TiC in Al2O3-Based Ceramic-Tool Materials

Electrostatic Assembly Preparation of High-Toughness Zirconium Diboride-Based Ceramic Composites with Enhanced Thermal Shock Resistance Performance

Controllable substrate bias voltages effectively tailoring nanocomposite Nb–B–Al–O film properties

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