Theoretical characterization of the temperature dependence of the contact mechanical properties of the particulate-reinforced ultra-high temperature ceramic matrix composites in Hertzian contact

Wang, Ruzhuan; Wang, Shu; Li, Dingyu; An, Xia; Zhang, Jun; Li, Weiguo; Zhang, Chuanzeng

doi:10.1016/j.ijsolstr.2021.01.005

Cited by 11 publications

(5 citation statements)

References 28 publications

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“…This is completely consistent with the experimental phenomenon. The fracture toughness and hardness of materials are also related to the sizes of big grains, preexisting microflaws and micropores [ 22 , 23 , 24 ]. Figure 5 also indicates that there is no obvious difference in the toughening mechanism of Al 2 O 3 -1.0 wt % graphene composites prepared at different sintering temperatures.…”

Section: Resultsmentioning

confidence: 99%

Effects of Preparation Methods on the Microstructure and Mechanical Properties of Graphene-Reinforced Alumina Matrix Composites

Zhang

Jia

et al. 2022

Materials

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Recent years have witnessed a growing research interest in graphene-reinforced alumina matrix composites (Al2O3-G). In this paper, to better achieve the dispersion of graphene in composites, a ball milling method for adding raw materials step by step, called stepwise feeding ball milling, was proposed. The Al2O3-1.0 wt % graphene composites were prepared by this stepwise feeding ball milling and hot pressing. Then, the effects of sintering temperature and sintering pressure on the microstructure and mechanical properties of composites were studied. Results showed that the bending strength, fracture toughness and Vickers hardness of composites increased firstly and then decreased with increasing sintering temperature. The mechanical properties of composites were all at their maximum with the sintering temperature of 1550 °C. For example, the bending strength of composites reached 754.20 MPa, which was much bigger than 478.03 MPa at 1500 °C and 364.01 MPa at 1600 °C. Analysis suggested that the strength of composites was mainly related to the grain size, microflaw size and porosity.

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Section: Resultsmentioning

confidence: 99%

Effects of Preparation Methods on the Microstructure and Mechanical Properties of Graphene-Reinforced Alumina Matrix Composites

Zhang

Jia

et al. 2022

Materials

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“…In the calculations, the relative parameters were determined by experiments and are shown in Table 1 [ 12 , 20 , 21 , 22 , 23 , 24 ]. As the temperature had little effect on the Poisson’s ratio of the UHTCs, the Poisson’s ratio of the materials at room temperature was used in the calculation process [ 12 , 13 , 14 , 15 , 16 ]. The effects of small changes to the Poisson’s ratio with temperature on the temperature dependence of the mechanical properties and the fracture behavior of the materials were ignored.…”

Section: Resultsmentioning

confidence: 99%

“…Considering the high-temperature applications of particulate-reinforced UHTC matrix composites, it is important and necessary to study the control mechanisms of microcracking and the fracture of composites at high temperatures. At present, the theoretical work mainly focuses on the high-temperature fracture strength of UHTC matrix composites; theoretical methods that can effectively characterize the effect of temperature and critical flaw size on the fracture strength of materials have been proposed [ 12 , 13 , 14 , 15 , 16 ]. However, few researchers have established a theoretical relationship between the critical inclusion size for stress-induced microcracking and temperature.…”

Section: Introductionmentioning

confidence: 99%

Stress-Induced Microcracking and Fracture Characterization for Ultra-High-Temperature Ceramic Matrix Composites at High Temperatures

Chen

et al. 2022

Materials

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In this paper, we estimated the temperature-dependent critical inclusion size for microcracking under residual stress and applied stress for particulate-reinforced ultra-high-temperature ceramic matrix composites. The critical flaw size and applied stress for the stable growth of radial cracks under different temperatures were also estimated. It was found that under a lower applied stress, the critical inclusion size was sensitive to the temperature. Under higher applied stresses, the sensitivity became smaller. For ceramic materials with pre-existing microcracks, the crack resistance could be improved by increasing the service stress when the service stress was low. As the temperature increased, the critical flaw size of the materials decreased; the applied stress first increased and then decreased. Finally, a temperature-dependent fracture strength model of composites with a pre-existing critical flaw was proposed. A good agreement was obtained between the model prediction and the experimental data. In this work, we show a method for the characterization of the effects of temperature on the fracture behavior of ceramic-based composites.

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“…17 Based on the physical fact that both force and temperature can cause failure of materials, we assume that under both mechanical force and heat, the limit value of the stored energy involved with the material fracture exists and is a constant, which includes the strain energy and the equivalent heat energy. 17,[26][27][28] According to this principle, we can obtain…”

Section: Theoretical Modelsmentioning

confidence: 99%

Characterization of temperature dependence of fracture behavior of monolithic and laminated ultra‐high temperature ceramic matrix composites

Wan

Wang

Jia

et al. 2022

Fatigue Fract Eng Mat Struct

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The fracture behavior of ultra-high temperature ceramic matrix composites at high temperature has received increasing attention. However, few studies consider the effect of particle/crack interaction on the high temperature fracture strength of materials. In this work, the effect of particle/crack interaction is introduced into temperature-dependent fracture strength model of monolithic ultra-high temperature ceramic matrix composites, which also considers effects of flaw size, grain size, and residual thermal stress. Furthermore, by considering the influence of laminated structure, a theoretical model of the temperature-dependent fracture strength of laminated ceramic matrix composites is developed. The effect of particle/crack interaction is also included in this model. It should be noted that the predictions of models agree well with the experimental data of both monolithic and laminated materials without using any fitting parameters. The effect of particle/crack interaction is found to have a significant weakening effect on the strength of materials at different temperatures.fracture strength, monolithic and laminated ultra-high temperature ceramic matrix composites, particle/crack interaction, temperature-dependent model

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Theoretical characterization of the temperature dependence of the contact mechanical properties of the particulate-reinforced ultra-high temperature ceramic matrix composites in Hertzian contact

Cited by 11 publications

References 28 publications

Effects of Preparation Methods on the Microstructure and Mechanical Properties of Graphene-Reinforced Alumina Matrix Composites

Effects of Preparation Methods on the Microstructure and Mechanical Properties of Graphene-Reinforced Alumina Matrix Composites

Stress-Induced Microcracking and Fracture Characterization for Ultra-High-Temperature Ceramic Matrix Composites at High Temperatures

Characterization of temperature dependence of fracture behavior of monolithic and laminated ultra‐high temperature ceramic matrix composites

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