Journal of The European Ceramic Society最新文献

英文中文

Ultra-High strength and toughness continuous SiCf/SiC ceramic matrix composites prepared by an additive manufacturing manipulator

IF 5.8 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society

Pub Date : 2024-12-30 DOI: 10.1016/j.jeurceramsoc.2024.117176

Zhufeng Liu , Zhaoqing Li , Qi Li , Changshun Wang , Peng Chen , Lei Yang , Lichao Zhang , Bin Su , Chunze Yan , Yusheng Shi

Additive manufacturing (AM) technology provides a pathway for the preparation of complex structured silicon carbide (SiC) ceramics. Due to the high brittleness of SiC materials and a high scrap rate for large and complex SiC ceramics, short-cut and continuous carbon fibers have been used to improve the toughness of AM SiC ceramics, but the reinforcement effect is limited. Here, we report a novel combination process of the continuous fiber AM, precursor infiltration pyrolysis (PIP) and liquid-phase silicon infiltration (LSI) to prepare continuous SiC fiber (SiC_f) -reinforced SiC ceramic matrix composites (CMC). Continuous SiC fibers as reinforcing phases can improve the strength and toughness of SiC ceramics. The two polycarbosilane (PCS) PIP processes form a SiC interface layer on the surface of continuous fibers to avoid fiber corrosion during the LSI process. The multiple phenolic resin infiltration and pyrolysis processes regulate the carbon density and microstructure of carbonized parts. In the LSI process, the liquid-phase silicon reacts with partially pyrolytic carbon to generate SiC. When the carbon density of the carbonized part is 0.85 g/cm³, the final part has the high flexural strength and fracture toughness of 398 MPa and 10.79 MPa·m^1/2, respectively. Through enhancing the strength and toughness of SiC ceramics, the complex SiC CMC parts prepared by the proposed combination process show great application prospects in various fields.

{"title":"Ultra-High strength and toughness continuous SiCf/SiC ceramic matrix composites prepared by an additive manufacturing manipulator","authors":"Zhufeng Liu , Zhaoqing Li , Qi Li , Changshun Wang , Peng Chen , Lei Yang , Lichao Zhang , Bin Su , Chunze Yan , Yusheng Shi","doi":"10.1016/j.jeurceramsoc.2024.117176","DOIUrl":"10.1016/j.jeurceramsoc.2024.117176","url":null,"abstract":"<div><div>Additive manufacturing (AM) technology provides a pathway for the preparation of complex structured silicon carbide (SiC) ceramics. Due to the high brittleness of SiC materials and a high scrap rate for large and complex SiC ceramics, short-cut and continuous carbon fibers have been used to improve the toughness of AM SiC ceramics, but the reinforcement effect is limited. Here, we report a novel combination process of the continuous fiber AM, precursor infiltration pyrolysis (PIP) and liquid-phase silicon infiltration (LSI) to prepare continuous SiC fiber (SiC<sub>f</sub>) -reinforced SiC ceramic matrix composites (CMC). Continuous SiC fibers as reinforcing phases can improve the strength and toughness of SiC ceramics. The two polycarbosilane (PCS) PIP processes form a SiC interface layer on the surface of continuous fibers to avoid fiber corrosion during the LSI process. The multiple phenolic resin infiltration and pyrolysis processes regulate the carbon density and microstructure of carbonized parts. In the LSI process, the liquid-phase silicon reacts with partially pyrolytic carbon to generate SiC. When the carbon density of the carbonized part is 0.85 g/cm<sup>3</sup>, the final part has the high flexural strength and fracture toughness of 398 MPa and 10.79 MPa·m<sup>1/2</sup>, respectively. Through enhancing the strength and toughness of SiC ceramics, the complex SiC CMC parts prepared by the proposed combination process show great application prospects in various fields.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 6","pages":"Article 117176"},"PeriodicalIF":5.8,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143156934","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tuning the carbon content of silicon carbonitride SiCN(O) materials obtained from hydrosilylation-derived polysilazanes

IF 5.8 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society

Pub Date : 2024-12-30 DOI: 10.1016/j.jeurceramsoc.2024.117177

Zofia Kucia , Maciej Bik , Piotr Jeleń , Zbigniew Olejniczak , Krzysztof Mroczka , Daria Pakuła , Robert Przekop , Martina Urbanova , Jiri Brus , Günter Motz , Maciej Sitarz

Polymer-derived silicon carbonitride SiCN(O) materials with tunable carbon content were obtained from polysilazanes synthesized from silazane monomers, and carbon-containing crosslinkers via the hydrosilylation reaction. The polysilazanes were characterized by ATR-FTIR and Raman spectroscopy in terms of the presence of various functional groups. Three polysilazanes were chosen as preceramic precursors for the materials, and pyrolyzed at 800°C in argon. DRIFT spectroscopy and ²⁹Si MAS NMR confirmed the presence of Si–N bonds in the materials, and Si–C bonds in one sample only, as well as oxygen contamination in the form of Si–O bonds in all samples. Consequently, the obtained materials should be referred to as SiCN(O). Raman spectroscopy and ¹³C MAS NMR indicate that the materials contain the free carbon phase. Elemental analysis revealed that the carbon content in SiCN(O) materials can be adjusted from 25.7 at% to 45.3 at% by selecting appropriate silazane monomers and crosslinkers.

{"title":"Tuning the carbon content of silicon carbonitride SiCN(O) materials obtained from hydrosilylation-derived polysilazanes","authors":"Zofia Kucia , Maciej Bik , Piotr Jeleń , Zbigniew Olejniczak , Krzysztof Mroczka , Daria Pakuła , Robert Przekop , Martina Urbanova , Jiri Brus , Günter Motz , Maciej Sitarz","doi":"10.1016/j.jeurceramsoc.2024.117177","DOIUrl":"10.1016/j.jeurceramsoc.2024.117177","url":null,"abstract":"<div><div>Polymer-derived silicon carbonitride SiCN(O) materials with tunable carbon content were obtained from polysilazanes synthesized from silazane monomers, and carbon-containing crosslinkers via the hydrosilylation reaction. The polysilazanes were characterized by ATR-FTIR and Raman spectroscopy in terms of the presence of various functional groups. Three polysilazanes were chosen as preceramic precursors for the materials, and pyrolyzed at 800°C in argon. DRIFT spectroscopy and <sup>29</sup>Si MAS NMR confirmed the presence of Si–N bonds in the materials, and Si–C bonds in one sample only, as well as oxygen contamination in the form of Si–O bonds in all samples. Consequently, the obtained materials should be referred to as SiCN(O). Raman spectroscopy and <sup>13</sup>C MAS NMR indicate that the materials contain the free carbon phase. Elemental analysis revealed that the carbon content in SiCN(O) materials can be adjusted from 25.7 at% to 45.3 at% by selecting appropriate silazane monomers and crosslinkers.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 6","pages":"Article 117177"},"PeriodicalIF":5.8,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143156936","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study on the propagation behavior of ablation-induced cracks in HfC-coated C/C composites by finite element numerical simulation

IF 5.8 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society

Pub Date : 2024-12-29 DOI: 10.1016/j.jeurceramsoc.2024.117175

Jingtong Li , Jian Zhang , Yulei Zhang , Yanqin Fu , Ruicong Chen , Haohui Zhang

A combustion fluid-structure coupling model of O₂-C₂H₂ was established, and finite element simulation was employed to analyze the evolution law and interaction mechanism of HfC coating defects following oxygen acetylene ablation in this work. By conducting semi-quantitative simulations of the combustion reaction and flame erosion flow field, the distribution of various products in ablative flames on the surface of coated samples was obtained, thereby revealing the transition pattern of flame flow from vertical to horizontal direction. The results showed that the ablation morphology in different regions of HfC coated samples was determined by temperature, oxidation degree, and flame flow erosion behavior, which was consistent with the surface and cross-section images of the specimen after ablation. Moreover, vertically oriented cracks continued to propagate along their original surface and evolved into penetrating cracks, while inclined cracks tended to develop into inclined cracks or stepped cracks, which was supported by experimental results. Furthermore, the micropores had a promoting influence on crack growth, and there was a competitive effect among the pores of different positions and sizes in attracting cracks. This study provides theoretical guidance for further analyzing ablation defects and offers fundamental insights for improving the ablation resistance of coating.

{"title":"Study on the propagation behavior of ablation-induced cracks in HfC-coated C/C composites by finite element numerical simulation","authors":"Jingtong Li , Jian Zhang , Yulei Zhang , Yanqin Fu , Ruicong Chen , Haohui Zhang","doi":"10.1016/j.jeurceramsoc.2024.117175","DOIUrl":"10.1016/j.jeurceramsoc.2024.117175","url":null,"abstract":"<div><div>A combustion fluid-structure coupling model of O<sub>2</sub>-C<sub>2</sub>H<sub>2</sub> was established, and finite element simulation was employed to analyze the evolution law and interaction mechanism of HfC coating defects following oxygen acetylene ablation in this work. By conducting semi-quantitative simulations of the combustion reaction and flame erosion flow field, the distribution of various products in ablative flames on the surface of coated samples was obtained, thereby revealing the transition pattern of flame flow from vertical to horizontal direction. The results showed that the ablation morphology in different regions of HfC coated samples was determined by temperature, oxidation degree, and flame flow erosion behavior, which was consistent with the surface and cross-section images of the specimen after ablation. Moreover, vertically oriented cracks continued to propagate along their original surface and evolved into penetrating cracks, while inclined cracks tended to develop into inclined cracks or stepped cracks, which was supported by experimental results. Furthermore, the micropores had a promoting influence on crack growth, and there was a competitive effect among the pores of different positions and sizes in attracting cracks. This study provides theoretical guidance for further analyzing ablation defects and offers fundamental insights for improving the ablation resistance of coating.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 6","pages":"Article 117175"},"PeriodicalIF":5.8,"publicationDate":"2024-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143156932","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fabrication of lightweight, high-strength Al2O3-B2O3 Scaffolds with enhanced adsorption properties via extrusion-based 3D printing

IF 5.8 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society

Pub Date : 2024-12-25 DOI: 10.1016/j.jeurceramsoc.2024.117161

Jingfei Liu , Wei Tang , Li Yang , Shiyan Tang , Xiaoran Zhou , Zhiyuan Yang , Zitian Fan

Al₁₈B₄O₃₃ is a binary compound formed in Al₂O₃-B₂O₃ systems, which has excellent properties such as hierarchical pore structure, lightweight, and high adsorption. In this study, Al₂O₃ and H₃BO₃ were used as the raw materials to prepare ceramic samples via extrusion-based 3D printing. The solid content of the ceramic slurry and sintering temperature were investigated. In addition, to further evaluate the potential biological applications of the porous material, biocompatibility experiments were conducted. The results show that the bending strength ranging from 8.71 to 40.63 MPa and the apparent porosity between 47.65 % and 55.33 %. And the prepared ceramic scaffold not only possesses significant protein adsorption capacity, but also promotes the adhesion and distribution of cells on its surface. This highlights the potential application of the Al₂O₃-B₂O₃ Scaffolds prepared in this study in the field of tissue engineering and regenerative medicine.

{"title":"Fabrication of lightweight, high-strength Al2O3-B2O3 Scaffolds with enhanced adsorption properties via extrusion-based 3D printing","authors":"Jingfei Liu , Wei Tang , Li Yang , Shiyan Tang , Xiaoran Zhou , Zhiyuan Yang , Zitian Fan","doi":"10.1016/j.jeurceramsoc.2024.117161","DOIUrl":"10.1016/j.jeurceramsoc.2024.117161","url":null,"abstract":"<div><div>Al<sub>18</sub>B<sub>4</sub>O<sub>33</sub> is a binary compound formed in Al<sub>2</sub>O<sub>3</sub>-B<sub>2</sub>O<sub>3</sub> systems, which has excellent properties such as hierarchical pore structure, lightweight, and high adsorption. In this study, Al<sub>2</sub>O<sub>3</sub> and H<sub>3</sub>BO<sub>3</sub> were used as the raw materials to prepare ceramic samples via extrusion-based 3D printing. The solid content of the ceramic slurry and sintering temperature were investigated. In addition, to further evaluate the potential biological applications of the porous material, biocompatibility experiments were conducted. The results show that the bending strength ranging from 8.71 to 40.63 MPa and the apparent porosity between 47.65 % and 55.33 %. And the prepared ceramic scaffold not only possesses significant protein adsorption capacity, but also promotes the adhesion and distribution of cells on its surface. This highlights the potential application of the Al<sub>2</sub>O<sub>3</sub>-B<sub>2</sub>O<sub>3</sub> Scaffolds prepared in this study in the field of tissue engineering and regenerative medicine.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 5","pages":"Article 117161"},"PeriodicalIF":5.8,"publicationDate":"2024-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143152973","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Thermo-mechanical damage of Al2O3-C reticulated porous ceramic and effect of functional coatings

IF 5.8 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society

Pub Date : 2024-12-25 DOI: 10.1016/j.jeurceramsoc.2024.117174

Yajie Dai , Jiajun Zhang , Haodong Wu , Enrico Storti , Jana Hubálková , Qingsheng Bai , Heinz Konietzky , Yawei Li , Christos G. Aneziris

Thermo-mechanical performance of carbon-bonded alumina filters is essential for guaranteeing their structural stability and filtration capability. This work investigates the Mode I fracture of Al₂O₃-C porous ceramic as well as the influence of reticulate structure and coatings (alumina and carbon-bonded calcium hexaluminate). The cylindrical splitting test is validated for evaluating the strength of foam and individual strut. DIC and AE techniques were applied to monitor tensile failure induced by compressive loading. The results showed central crack propagation and continuous AE signal release caused by localized damage. Generally, the mechanical strength increases with pore density and the application of alumina coating. This improvement results from more continuous stress transmission and better sintered struts. However, calcium hexaluminate coating is less effective for strengthening foams at room temperature. Both functional coatings and the continuity of reticulate foams show positive effect on the deformation resistance to temperature and load.

{"title":"Thermo-mechanical damage of Al2O3-C reticulated porous ceramic and effect of functional coatings","authors":"Yajie Dai , Jiajun Zhang , Haodong Wu , Enrico Storti , Jana Hubálková , Qingsheng Bai , Heinz Konietzky , Yawei Li , Christos G. Aneziris","doi":"10.1016/j.jeurceramsoc.2024.117174","DOIUrl":"10.1016/j.jeurceramsoc.2024.117174","url":null,"abstract":"<div><div>Thermo-mechanical performance of carbon-bonded alumina filters is essential for guaranteeing their structural stability and filtration capability. This work investigates the Mode I fracture of Al<sub>2</sub>O<sub>3</sub>-C porous ceramic as well as the influence of reticulate structure and coatings (alumina and carbon-bonded calcium hexaluminate). The cylindrical splitting test is validated for evaluating the strength of foam and individual strut. DIC and AE techniques were applied to monitor tensile failure induced by compressive loading. The results showed central crack propagation and continuous AE signal release caused by localized damage. Generally, the mechanical strength increases with pore density and the application of alumina coating. This improvement results from more continuous stress transmission and better sintered struts. However, calcium hexaluminate coating is less effective for strengthening foams at room temperature. Both functional coatings and the continuity of reticulate foams show positive effect on the deformation resistance to temperature and load.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 5","pages":"Article 117174"},"PeriodicalIF":5.8,"publicationDate":"2024-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143152971","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of the fibre volume content on the machinability and surface integrity in grinding C/C-SiC composites

IF 5.8 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society

Pub Date : 2024-12-25 DOI: 10.1016/j.jeurceramsoc.2024.117173

Patricia León-Pérez , Thorsten Opel , Georg Puchas , Nico Langhof , Ralf Goller , Stefan Schafföner , Dietmar Koch

Machining of carbon fibre reinforced silicon carbide composites (C/SiC, C/C–SiC) is a challenging task owing to their anisotropic, heterogeneous, and brittle nature. Effort is made in optimizing the process, yet the material microstructure is essential. In this regard, majority of studies evaluate the influence of fibre orientation. This paper investigates the effect of the fibre volume content of 2D fabric and short fibre reinforced C/C-SiC on the machinability and surface integrity by different grinding conditions. The effect on the grinding forces is discussed. The characterization of physical/mechanical properties, as well as the microstructure and phase composition are presented. Results reveal that the surface integrity is more influenced by the microstructure than by the grinding process. Little influence on the three-point-flexural strength was observed after machining. Samples with lower fibre content exhibit inferior mechanical properties, and higher grinding forces and surface roughness due to higher silicon, porosity and microcracks content.

{"title":"Effect of the fibre volume content on the machinability and surface integrity in grinding C/C-SiC composites","authors":"Patricia León-Pérez , Thorsten Opel , Georg Puchas , Nico Langhof , Ralf Goller , Stefan Schafföner , Dietmar Koch","doi":"10.1016/j.jeurceramsoc.2024.117173","DOIUrl":"10.1016/j.jeurceramsoc.2024.117173","url":null,"abstract":"<div><div>Machining of carbon fibre reinforced silicon carbide composites (C/SiC, C/C–SiC) is a challenging task owing to their anisotropic, heterogeneous, and brittle nature. Effort is made in optimizing the process, yet the material microstructure is essential. In this regard, majority of studies evaluate the influence of fibre orientation. This paper investigates the effect of the fibre volume content of 2D fabric and short fibre reinforced C/C-SiC on the machinability and surface integrity by different grinding conditions. The effect on the grinding forces is discussed. The characterization of physical/mechanical properties, as well as the microstructure and phase composition are presented. Results reveal that the surface integrity is more influenced by the microstructure than by the grinding process. Little influence on the three-point-flexural strength was observed after machining. Samples with lower fibre content exhibit inferior mechanical properties, and higher grinding forces and surface roughness due to higher silicon, porosity and microcracks content.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 6","pages":"Article 117173"},"PeriodicalIF":5.8,"publicationDate":"2024-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143156915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A strategy for consolidating ceramics along the surface of particles by shock wave sintering

IF 5.8 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society

Pub Date : 2024-12-25 DOI: 10.1016/j.jeurceramsoc.2024.117172

Jianian Hu , Qinming Gu , Zizheng Zhou , Yidi Li , Gang Yang

Traditional ceramic sintering methods face challenges in controlling grain size and maintaining desired material properties. Recent techniques like plasma activated sintering and spark plasma sintering offer improved grain size control but suffer from second phase formation and equipment limitations. In this study, we explore explosive shock wave sintering as a novel approach to rapidly sinter ceramic powders while preserving their original properties. Drawing parallels with shock wave compaction in porous materials, we propose that shock waves generated by explosive loading can induce rapid, inhomogeneous thermal fields on ceramic particle surfaces, inhibiting grain growth. The shock wave sintering of YSZ ceramic powders is investigated using theoretical models, discrete element simulations, and experimental analysis. Our findings reveal novel melting bonding, friction bonding and jet bonding mechanisms for ceramic interfacial sintering, providing valuable insights for the development of ceramics with enhanced control over grain size and interfacial structure.

{"title":"A strategy for consolidating ceramics along the surface of particles by shock wave sintering","authors":"Jianian Hu , Qinming Gu , Zizheng Zhou , Yidi Li , Gang Yang","doi":"10.1016/j.jeurceramsoc.2024.117172","DOIUrl":"10.1016/j.jeurceramsoc.2024.117172","url":null,"abstract":"<div><div>Traditional ceramic sintering methods face challenges in controlling grain size and maintaining desired material properties. Recent techniques like plasma activated sintering and spark plasma sintering offer improved grain size control but suffer from second phase formation and equipment limitations. In this study, we explore explosive shock wave sintering as a novel approach to rapidly sinter ceramic powders while preserving their original properties. Drawing parallels with shock wave compaction in porous materials, we propose that shock waves generated by explosive loading can induce rapid, inhomogeneous thermal fields on ceramic particle surfaces, inhibiting grain growth. The shock wave sintering of YSZ ceramic powders is investigated using theoretical models, discrete element simulations, and experimental analysis. Our findings reveal novel melting bonding, friction bonding and jet bonding mechanisms for ceramic interfacial sintering, providing valuable insights for the development of ceramics with enhanced control over grain size and interfacial structure.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 6","pages":"Article 117172"},"PeriodicalIF":5.8,"publicationDate":"2024-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143156187","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High-temperature tribological behavior and mechanisms of a high entropy carbide ceramic

IF 5.8 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society

Pub Date : 2024-12-24 DOI: 10.1016/j.jeurceramsoc.2024.117170

Yuehui Li , Yin Du , Xuhui Pei , Tao Li , Hongxing Wu , Wei Zhou , Haifeng Wang , Weimin Liu

Ceramic materials based on the concept of "high-entropy" have demonstrated superior comprehensive properties compared to their individual components, thus becoming a prominent research focus. Here, a (TiZrVNb)C high-entropy carbide ceramic (HECC) was successfully synthesized through spark plasma sintering, and the impact of high-entropy characteristics on tribological behavior from room temperature to 900 °C was studied. Results show that the HECC exhibits enhanced mechanical properties and superior wear resistance across a wide temperature range in comparison to ZrC. The solution strengthening and lattice distortion effects in the HECC not only enhance hardness and fracture toughness, but also confer exceptional wear resistance. Additionally, the high entropy effect brought by the HECC's multi-component significantly enhances its oxidation performance at high temperatures, and enables the oxide layer to effectively play the role of friction and wear barrier.

引用次数: 0

Critical evaluation and thermodynamic modeling of the AlN-Al2O3 and the AlN-Al2O3-MgO systems and applications to AlN and MgAlON sintering process

IF 5.8 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society

Pub Date : 2024-12-24 DOI: 10.1016/j.jeurceramsoc.2024.117168

Jeong-Min Cheon , In-Ho Jung

Thermodynamic modeling of the AlN-Al₂O₃ system and AlN-Al₂O₃-MgO system was carried out in the present study based on the critical evaluation of all available data. The γ-MgAlON spinel solution was successfully described by the extension of γ-MgAl₂O₄ spinel in MgO-Al₂O₃ system and γ-AlON spinel in AlN-Al₂O₃ system. The liquid solution in the AlN-Al₂O₃-MgO system was also well described by the reciprocal liquid solution (Al,Mg//O,N) using Modified Quasi-chemical Model with Quadruplet Approximation (MQMQA). The liquidus projection of the AlN-Al₂O₃-MgO system was predicted for the first time. The present thermodynamic modeling results can be used for calculations of any chemical reactions and phase diagrams within the entire AlN-Al₂O₃-MgO system. As applications of the present thermodynamic database, the phase evolutions in the sintering processes for AlN ceramics with MgO additive and transparent MgAlON ceramics were simulated to give the guidance for the sintering processes.

{"title":"Critical evaluation and thermodynamic modeling of the AlN-Al2O3 and the AlN-Al2O3-MgO systems and applications to AlN and MgAlON sintering process","authors":"Jeong-Min Cheon , In-Ho Jung","doi":"10.1016/j.jeurceramsoc.2024.117168","DOIUrl":"10.1016/j.jeurceramsoc.2024.117168","url":null,"abstract":"<div><div>Thermodynamic modeling of the AlN-Al<sub>2</sub>O<sub>3</sub> system and AlN-Al<sub>2</sub>O<sub>3</sub>-MgO system was carried out in the present study based on the critical evaluation of all available data. The γ-MgAlON spinel solution was successfully described by the extension of γ-MgAl<sub>2</sub>O<sub>4</sub> spinel in MgO-Al<sub>2</sub>O<sub>3</sub> system and γ-AlON spinel in AlN-Al<sub>2</sub>O<sub>3</sub> system. The liquid solution in the AlN-Al<sub>2</sub>O<sub>3</sub>-MgO system was also well described by the reciprocal liquid solution (Al,Mg//O,N) using Modified Quasi-chemical Model with Quadruplet Approximation (MQMQA). The liquidus projection of the AlN-Al<sub>2</sub>O<sub>3</sub>-MgO system was predicted for the first time. The present thermodynamic modeling results can be used for calculations of any chemical reactions and phase diagrams within the entire AlN-Al<sub>2</sub>O<sub>3</sub>-MgO system. As applications of the present thermodynamic database, the phase evolutions in the sintering processes for AlN ceramics with MgO additive and transparent MgAlON ceramics were simulated to give the guidance for the sintering processes.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 6","pages":"Article 117168"},"PeriodicalIF":5.8,"publicationDate":"2024-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143156928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The effect of hot forging on the thermal and mechanical properties of spark plasma sintered SiC-TiB2-B4C Composites with CeO2 Addition

IF 5.8 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society

Pub Date : 2024-12-23 DOI: 10.1016/j.jeurceramsoc.2024.117169

A. Furkan Buluc , Elif Celikkardes , Servet Turan , Hyoung-jun Kim , Young-Wook Kim

Sintering of SiC-TiB₂-B₄C composite was carried out by SPS at 1900°C and hot forging was applied at 2050 °C to improve mechanical and thermal properties. A fully dense ceramic, with density of 3.08 g/cm³ was obtained after SPS and the properties of the composite improved after hot forging. During SPS sintering, TiB₂ and graphite phases were in-situ formed consuming all TiC. Very strong orientation of graphite, coarsening of grain size and reduction in both liquid phase and porosities were observed after hot forging. While fracture toughness increased without compromising hardness and flexural strength, the thermal conductivity was doubled depending on the orientation of the in-situ formed graphite after hot forging. The hardness, fracture toughness, thermal conductivity, elastic modulus and density of the sintered and hot forged composites were measured as 32.2–32.8 GPa, 4.0–4.4 MPa.m^1/2, 27.8–58.1 W‧m⁻¹‧K⁻¹, 280–315 GPa and 3.12–3.08 g/cm³ respectively.

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