Effect of SiC whiskers and graphene nanosheets on the mechanical properties of ZrB2-SiCw-Graphene ceramic composites

An, Yumin; Xu, Xiaoqiang; Gui, Kaixuan

doi:10.1016/j.ceramint.2016.06.014

Cited by 46 publications

(6 citation statements)

References 30 publications

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“…Ongoing studies have confirmed that the introduction of silicon carbide or refractory metal silicide into the composition of UHTCs based on ZrB 2 (HfB 2 ) supports a significant increase in their resistance to oxidation at temperatures >1800-2000 • C, including under the influence of high-speed gas flows containing atomic oxygen (which is characteristic of aerodynamic heating by supersonic/hypersonic air flows) while maintaining increased thermal conductivity [16,[25][26][27][28][29][30][31][32][33]. Modification of these ceramic materials with carbon materials (graphite, carbon fibers or carbon nanotubes), as shown in [34][35][36][37][38][39][40][41], makes it possible to slightly improve crack resistance and thermal shock resistance. In our previous studies, it was established [42][43][44] that due to the introduction of a small amount (1-2 vol.%) of graphene into the composition of HfB 2 -30 vol.%SiC material, there is an opportunity to reduce the degree of its degradation (thickness of the oxidized layer and rate of entrainment) by reducing the temperature that is reached at the surface under the same thermochemical effect of supersonic dissociated air flow, which is probably due to the increase in thermal conductivity.…”

Section: Introductionmentioning

confidence: 94%

Oxidation of Ceramic Materials Based on HfB2-SiC under the Influence of Supersonic CO2 Jets and Additional Laser Heating

Simonenko,

Kolesnikov,

Chaplygin

et al. 2023

IJMS

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The features of oxidation of ultra-high-temperature ceramic material HfB2-30 vol.%SiC modified with 1 vol.% graphene as a result of supersonic flow of dissociated CO2 (generated with the use of high-frequency induction plasmatron), as well as under the influence of combined heating by high-speed CO2 jets and ytterbium laser radiation, were studied for the first time. It was found that the addition of laser radiation leads to local heating of the central region from ~1750 to ~2000–2200 °C; the observed temperature difference between the central region and the periphery of ~300–550 °C did not lead to cracking and destruction of the sample. Oxidized surfaces and cross sections of HfB2-SiC-CG ceramics with and without laser heating were investigated using X-ray phase analysis, Raman spectroscopy and scanning electron microscopy with local elemental analysis. During oxidation by supersonic flow of dissociated CO2, a multilayer near-surface region similar to that formed under the influence of high-speed dissociated air flows was formed. An increase in surface temperature with the addition of laser heating from 1750–1790 to 2000–2200 °C (short term, within 2 min) led to a two to threefold increase in the thickness of the degraded near-surface area of ceramics from 165 to 380 microns. The experimental results indicate promising applications of ceramic materials based on HfB2-SiC as part of high-speed flying vehicles in planetary atmospheres predominantly composed of CO2 (e.g., Venus and Mars).

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Section: Introductionmentioning

confidence: 94%

Oxidation of Ceramic Materials Based on HfB2-SiC under the Influence of Supersonic CO2 Jets and Additional Laser Heating

Simonenko,

Kolesnikov,

Chaplygin

et al. 2023

IJMS

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“…Graphene-reinforced ceramic composites, which possess the strongest 2D nanomaterial, have been studied extensively [161][162][163][164][165][166][167][168][169][170]. Two reviews have already examined critically the effect of graphene [171,172].…”

Section: Strengthmentioning

confidence: 99%

Mechanical and tribological properties of nanocomposites incorporated with two-dimensional materials

et al. 2020

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In recent years, attempts to improve the mechanical properties of composites have increased remarkably owing to the inadequate utilization of matrices in demanding technological systems where efficiency, durability, and environmental compatibility are the key requirements. The search for novel materials that can potentially have enhanced mechanical properties continues. Recent studies have demonstrated that two-dimensional (2D) nanomaterials can act as excellent reinforcements because they possess high modulus of elasticity, high strength, and ultralow friction. By incorporating 2D nanomaterials in a composite, 2D nanomaterial-based composites (2DNBCs) have been developed. In view of this, a critical review of recent mechanical and tribological studies based on 2DNBCs has been undertaken. Matrices such as polymers, ceramics, and metals, as well as most of the representative 2D nanomaterial reinforcements such as graphene, boron nitride (BN), molybdenum disulfide (MoS2), and transition metal carbides and nitrides (MXenes) have been included in this review. Their preparation strategies, intrinsic mechanical properties, friction and lubrication performances, strengthening mechanisms, influencing factors, and potential applications have been comprehensively discussed. A brief summary and prospects are given in the final part, which would be useful in designing and fabricating advanced 2D nanocomposites in the future.

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“…For bionic layered graphene ceramic matrix composites, little research has been conducted on the grinding and removal mechanisms, crack propagation mechanisms, process parameter optimization and surface and subsurface damage mechanisms. However, the structure of composites is a layered biomimetic structure, referencing the "brick-bridge-mud" crossscale micro and nano structure of a shell [21] , and this highly ordered structure provides the composite with better properties than any single component, which is different from the fiber bundle structures of fiber toughened ceramic matrix composites, and the grinding theories on hard and brittle materials and fiber toughened composites are insufficient to explain the grinding process of the composites. Moreover, with the gradual application of bionic layered graphene ceramic matrix composites, there will be more and more processing problems about this material, which will affect the promotion of this ceramic material.…”

Section: Introductionmentioning

confidence: 99%

Study on grinding removal mechanism and subsurface damage of bionic layered graphene ceramic matrix composites

Zhou,

Zou,

Zhang

et al. 2024

Int J Adv Manuf Technol

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Bionic layered graphene ceramic matrix composites have excellent properties of high strength, high toughness and heat resistance, and are important materials for national defense equipment, but they are also typical brittle and difficult-to-machine materials. To achieve high quality and low damage machining of the composite parts, grinding removal mechanism and subsurface damage are investigated in this paper. Firstly, the SPH simulation models for indentation and scratching of a single diamond grain are established. The effect of addition of graphene nanosheets on the crack expansion mechanism and subsurface damage is investigated. Then, the simulation models of different angles of graphene nanosheets are established to analyze the effect of graphene anisotropy on grinding process of composites. Finally, the grinding removal mechanism of the composites is investigated by analysing crack expansion and removal forms of the composites at different scratching velocities and depths. The results show that incorporation of graphene nanosheets can reduce subsurface damage of composites and provide a certain shielding effect on the cracks. The optimal effects for reducing subsurface damage and cracks are obtained when graphene nanosheets angle is 0°. As scratching depth increases, the material removal mode gradually changes from plastic removal to brittle removal, and subsurface damage and crack depths also increases. The increase in scratching velocity leads to a subsequent increase in material strain rate, which inhibits crack generation and reduces subsurface damage depth. The form of material removal and crack generation in scratching experiments is consistent with the simulation analysis when changing the scratching depth.Furthermore, the effect of graphene nanosheets on crack deflection corresponds with the simulation results. This study can provide an important theoretical basis for the grinding process of bionic layered graphene ceramic matrix composite parts.

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Effect of SiC whiskers and graphene nanosheets on the mechanical properties of ZrB2-SiCw-Graphene ceramic composites

Cited by 46 publications

References 30 publications

Oxidation of Ceramic Materials Based on HfB2-SiC under the Influence of Supersonic CO2 Jets and Additional Laser Heating

Oxidation of Ceramic Materials Based on HfB2-SiC under the Influence of Supersonic CO2 Jets and Additional Laser Heating

Mechanical and tribological properties of nanocomposites incorporated with two-dimensional materials

Study on grinding removal mechanism and subsurface damage of bionic layered graphene ceramic matrix composites

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