Preparation of pore-controllable zirconium carbide ceramics with tunable mechanical strength, thermal conductivity and sound absorption coefficient

Yan, Ningning; Fu, Qiangang; Zhang, Yuyu; Li, Kun; Xie, Wei; Zhang, Jiaping; Zhuang, Lei; Shi, Xiaohong

doi:10.1016/j.ceramint.2020.05.023

Cited by 30 publications

(19 citation statements)

References 37 publications

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“…Yan et al. investigated the effect of porosity on the properties of ZrC, including thermal conductivity 44 . They showed that as porosity increased, the thermal conductivity decreased.…”

Section: Resultsmentioning

confidence: 99%

Thermal and electrical properties of a high entropy carbide (Ta, Hf, Nb, Zr) at elevated temperatures

et al. 2022

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The thermal and electrical properties were measured for a high entropy carbide ceramic, consisting of (Hf, Ta, Zr, Nb)C. The ceramic was produced by spark plasma sintering a mixture of the monocarbides and had a relative density of more than 97.6%. The resulting ceramic was chemically homogeneous as a single‐phase solid solution formed from the constituent carbides. The thermal diffusivity (0.045–0.087 cm2/s) and heat capacity (0.23–0.44 J/g•K) were measured from room temperature up to 2000°C. The thermal conductivity increased from 10.7 W/m•K at room temperature to 39.9 W/m•K at 2000°C. The phonon and electron contributions to the thermal conductivity were investigated, which showed that the increase in thermal conductivity was predominantly due to the electron contribution, while the phonon contribution was independent of temperature. The electrical resistivity increased from 80.9 μΩ•cm at room temperature to 114.1 μΩ•cm at 800°C.

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“…Yan et al. investigated the effect of porosity on the properties of ZrC, including thermal conductivity 44 . They showed that as porosity increased, the thermal conductivity decreased.…”

Section: Resultsmentioning

confidence: 99%

Thermal and electrical properties of a high entropy carbide (Ta, Hf, Nb, Zr) at elevated temperatures

et al. 2022

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“…The decrease of volume expansion of carbon block, according to CB addition, could be confirmed through two aspects. First, as shown in the results of the thermal properties of carbon blocks, the carbonization yield increased by CB absorbing the low molecular weight compounds in the binder pitch during the carbonization process [26,27]. These results were due to the oil absorption ability of the CB, and the volume expansion of carbon block could be partially inhibited by preventing the evaporation of low molecular weight compounds.…”

Section: Volume Expansion and Porosity Control Of Carbon Block By Cb mentioning

confidence: 98%

“…On the other hand, all the CB added samples showed increased char yield compared to C_CB_0. The CB had a specific aggregate structure that could absorb low molecular weight compounds in the pitch [26,27]. When the low molecular weight compounds in the pitch were evaporated during the carbonization process, the CB absorbed low molecular weight compounds, and therefore the char yield of the carbon blocks increased.…”

Section: The Thermal Properties Of Carbon Block According To Cb Additionmentioning

confidence: 99%

“…The mechanism was defined based on the results of the CB addition to the carbon blocks, and is suggested in Figure 8. The CB could absorb the low molecular weight compounds in the binder pitch during the carbonization process [26,27]. The properties of CB reduced the amount of gas generated by suppressing the evaporation of low molecular weight compounds (Figure 8b).…”

Section: Volume Expansion and Porosity Control Of Carbon Block By Cb mentioning

confidence: 99%

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The Control of Volume Expansion and Porosity in Carbon Block by Carbon Black (CB) Addition for Increasing Thermal Conductivity

et al. 2020

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The graphite block as a phase change materials (PCMs) was manufactured by graphitization of a carbon block. Carbon blocks were prepared by filler (cokes or graphite) and binder (pitch). The binder-coated filler was thermally treated for carbonization. The gases generated from the evaporation of low molecular weight components in the binder pitch during the carbonization process were not released to the outside. Consequently, porosity and volume expansion were increased in artificial graphite, and thereby the thermal conductivity decreased. In this study, to prevent the decrease of thermal conductivity in the artificial graphite due to the disadvantages of binder pitch, the carbon block was prepared by the addition of carbon black, which can absorb low molecular weight compounds and release the generated gas. The properties of the prepared carbon blocks were analyzed by SEM, TGA, and thermal conductivity. The addition of carbon black (CB) decreased the porosity and volume expansion of the carbon blocks by 38.3% and 65.9%, respectively, and increased the thermal conductivity by 57.1%. The CB absorbed the low molecular weight compounds of binder pitch and induced the release of generated gases during the carbonization process to decrease porosity, and the thermal conductivity of the carbon block increased.

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“…This is because the pores in ceramics are often the main reason for decreasing the strength of ceramics. 36,37 On the other hand, the flexural strength of sintered ceramics achieved a higher flexural strength when prepared with a relatively smaller particle size of 0.3 μm when compared to the ceramics prepared with 10-μm particles. This indicates that the particle size significantly affects the mechanical properties of ceramics.…”

Section: Mechanical Propertiesmentioning

confidence: 98%

Effect of zirconia content and particle size on the properties of 3D‐printed alumina‐based ceramic cores

Zeng

2021

J. Am. Ceram. Soc.

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Ceramics usually have high hardness which is difficult to achieve, especially for complex parts with fine structures. [1][2][3][4] Considering the requirements of ceramic cores with rather intricate structures and requiring high precision, it is essential to develop fast, low cost, and high-precision ceramic-forming techniques. 5,6 Ceramic cores are applied in the form of internal passages for high-temperature hollow blades, a key factor to determine the quality of hollow blades. 7 Traditional preparation of ceramic cores is not only time consuming but also expensive, thus hindering the development of aircraft engines. 8 Fortunately, the emergence of 3D printing technology has changed the traditional production. In this method, parts are fabricated based on a layer-by-layer forming mode, significantly saving the raw materials. 9 Among various 3D printing technologies, printed parts obtained using stereolithography technique have the highest accuracy. 10 Thus, stereolithography-based 3D printing technology provides the possibility to fabricate ceramics parts in a highly efficient manner. [11][12][13][14] Alumina-based ceramic cores could resist a high operating temperature of 1520-1875°C and exhibit excellent high-temperature stability, exhibiting obvious advantages compared to the currently most used silica-based ceramic cores. 15,16 However, the binding force between alumina grains is weak when the sintering temperature is relatively low; therefore, second-phase zirconia is added to the alumina-based ceramic cores to guarantee good connections between the ceramic grains. [17][18][19] Several studies have focused on alumina-zirconia composite ceramics. Zhu et al. 20 studied the ballistic impact performance of nanocrystalline zirconia-toughened alumina (nZTA) and alumina ceramics; the fracture toughness of nZTA was found to be about 1.3 times than that of alumina, indicating that the toughness of alumina ceramics increased by adding zirconia. To lower the manufacturing costs and development time for complex parts, Pappas et al. 21 found that

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Preparation of pore-controllable zirconium carbide ceramics with tunable mechanical strength, thermal conductivity and sound absorption coefficient

Cited by 30 publications

References 37 publications

Thermal and electrical properties of a high entropy carbide (Ta, Hf, Nb, Zr) at elevated temperatures

Thermal and electrical properties of a high entropy carbide (Ta, Hf, Nb, Zr) at elevated temperatures

The Control of Volume Expansion and Porosity in Carbon Block by Carbon Black (CB) Addition for Increasing Thermal Conductivity

Effect of zirconia content and particle size on the properties of 3D‐printed alumina‐based ceramic cores

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