Journal of the American Ceramic Society最新文献_第2页

Hydrothermal corrosion behavior of silicon carbide ceramics with prefabricated indentation-induced cracks 预制压痕裂纹碳化硅陶瓷的水热腐蚀行为

IF 3.5 3区材料科学

Journal of the American Ceramic Society Pub Date : 2025-02-24 DOI: 10.1111/jace.20453

Yang-Qing Liu, Chuang-Tian Zhan, Wei-Ming Guo, Ze-Xi Zhang, Ying Long, Hua-Tay Lin

{"title":"Hydrothermal corrosion behavior of silicon carbide ceramics with prefabricated indentation-induced cracks","authors":"Yang-Qing Liu, Chuang-Tian Zhan, Wei-Ming Guo, Ze-Xi Zhang, Ying Long, Hua-Tay Lin","doi":"10.1111/jace.20453","DOIUrl":"https://doi.org/10.1111/jace.20453","url":null,"abstract":"The presence of unavoidable microcracks may play a vitally important role in determining the service performance and lifetime of the silicon carbide (SiC) components and parts, and greatly affect the service life under the high-temperature and high-pressure water environment. However, studies on the hydrothermal corrosion behavior with the presence of cracks were rarely reported. In the present work, prefabricated indentation-induced cracks were printed on three SiC samples (solid-phase sintered SiC [SP-SiC], liquid-phase sintered SiC, and chemical vapor deposited SiC) under different applied loads, and the effects of prefabricated cracks on hydrothermal corrosion behavior of the samples in high-temperature water were investigated and compared. The results showed that, with the prefabricated indentation-induced cracks printed under the same applied load, the SP-SiC exhibited the worst hydrothermal corrosion resistance among the three SiC samples studied, in which crack deflection and spalling were easily formed, mainly attributed to the concentrated pores formed around the sintering aid (B + C). These pores formed could be enlarged and lead to accelerated indentation-induced crack propagation under the attack of high-temperature water and also the presence of a high-stress field.","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 6","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143770561","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Exploring the ductile-regime machining on cemented carbide: A perspective review 硬质合金塑性加工研究进展综述

IF 3.5 3区材料科学

Journal of the American Ceramic Society Pub Date : 2025-02-24 DOI: 10.1111/jace.20449

Shuo Wang, Hanzhong Liu, Bing Wu, Wenjun Zong

{"title":"Exploring the ductile-regime machining on cemented carbide: A perspective review","authors":"Shuo Wang, Hanzhong Liu, Bing Wu, Wenjun Zong","doi":"10.1111/jace.20449","DOIUrl":"https://doi.org/10.1111/jace.20449","url":null,"abstract":"Strict requirements on the surface qualities of cemented carbide have been raised in the manufacturing of functional components and glass molding. However, the high hardness increases the difficulty in improving surface qualities. The application of ductile-regime machining theory to improve the surface quality of cemented carbide is unsatisfactory because of the severe tool wear, varying factors and microstructure defects induced by stress. To illustrate the complex mechanism in the removal of cemented carbide, firstly, the theory of ductile-regime machining for the cemented carbide are introduced. Secondly, methods for evaluating the mechanical properties of cemented carbide are discussed in terms of the microstructures. Thirdly, the conflicts between the traditional ductile-regime machining theory and microstructure defects are analyzed, leading to proposed limitations and solutions for applying ductile-regime machining to composite materials. In addition, the developments of ultra-hard tools and energy field-assisted machining techniques applied to the cemented carbide are summarized and discussed. Finally, the technical challenges and future solutions in this field are further pointed out.","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 6","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143770558","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Microstructure and macroscopic superconducting properties of GdBa2Cu3Oy bulk superconductors with different heights 不同高度GdBa2Cu3Oy块体超导体的微观结构和宏观超导性能

IF 3.5 3区材料科学

Journal of the American Ceramic Society Pub Date : 2025-02-24 DOI: 10.1111/jace.20435

Daniela Volochová, Monika Radušovská, Pavel Diko

引用次数: 0

Degradation of radioactive waste encapsulation of BaO−FeOx−P2O5 glass evaluated from electrical conductivity 从电导率评价放射性废物包封BaO - FeOx - P2O5玻璃的降解

IF 3.5 3区材料科学

Journal of the American Ceramic Society Pub Date : 2025-02-24 DOI: 10.1111/jace.20434

Kazuki Mitsui, Nobuyasu Nishioka, Hiromichi Takebe, Richard K. Brow, Akira Saitoh

{"title":"Degradation of radioactive waste encapsulation of BaO−FeOx−P2O5 glass evaluated from electrical conductivity","authors":"Kazuki Mitsui, Nobuyasu Nishioka, Hiromichi Takebe, Richard K. Brow, Akira Saitoh","doi":"10.1111/jace.20434","DOIUrl":"https://doi.org/10.1111/jace.20434","url":null,"abstract":"We report on the electrical conductivity of barium iron phosphate glass, a candidate for radioactive waste encapsulating glass. The glass composition has been optimized for slow dissolution in hot water because the precipitation of a stable hydration layer of FeO(OH) on the glass surface enhances the water durability of the glass. The mechanism of electrical conductivity of the glass is assumed to be an electron hopping between the electronic energy levels of Fe (II) and Fe (III) ions, obeying the electron carrier generation of Fe (II) → Fe (III) + e−. The electrical conductivity of the base glass was ∼3.2 × 10−7 to ∼5.0 × 10−4 S/cm, from 200 to 550°C, whereas samples with surface hydration layers after the water durability tests had conductivities one order of magnitude lower than the base glass sample. The electrical conductivity of a crystallized sample was ∼0.8 × 10−7 S/cm at 400°C. X-ray photoelectron spectroscopy revealed the existence of Fe (II) and Fe (III), and P−O−Fe (Ba) and P−O−P bonds, and it was found that electrical conductivity increased in the order of increasing Fe (II)/Fe (III) ratio for the bulk, the corroded, and the crystallized samples.","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 6","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143770560","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Mechanical and biological properties of zirconia crowns prepared by digital light processing 数字光处理制备氧化锆冠的力学和生物学特性

IF 3.5 3区材料科学

Journal of the American Ceramic Society Pub Date : 2025-02-23 DOI: 10.1111/jace.20452

Jun-Jie Su, Xin-Yang Li, Zi-Mo Liu, Jia-Min Wu, Cui Huang, Chen-Min Yao, Xiao-Yan Zhang, Xiu-Mei Wang, Yu-Sheng Shi

{"title":"Mechanical and biological properties of zirconia crowns prepared by digital light processing","authors":"Jun-Jie Su, Xin-Yang Li, Zi-Mo Liu, Jia-Min Wu, Cui Huang, Chen-Min Yao, Xiao-Yan Zhang, Xiu-Mei Wang, Yu-Sheng Shi","doi":"10.1111/jace.20452","DOIUrl":"https://doi.org/10.1111/jace.20452","url":null,"abstract":"Zirconia (ZrO2) ceramics have been extensively used for dental restorations, but the biocompatibility and mechanical properties of three-dimensional (3D)-printed zirconia materials have not been thoroughly validated yet. In this study, we employed digital light processing (DLP) technology to fabricate zirconia ceramic crowns. The variation in sintering temperature resulted in alterations in phase composition and microstructure. The ceramics exhibited high average relative density, compressive strength, and Vickers hardness values at 1500°C (97.33%, 1812.61 MPa, and 12.55 GPa, respectively). Meanwhile, the zirconia ceramics sintered at 1500°C showed a maximum flexural strength of 411.33 MPa. In addition, the DLP-printed zirconia materials demonstrated satisfactory biocompatibility, with a cell viability of 93.35% after 7 days. No significant inflammatory response or cell deformation was detected (p = .51). The ceramics had no adverse effect on cell adhesion or growth at the initial stages. The results indicate that DLP technology-fabricated zirconia crowns have favorable mechanical properties and biocompatibility.","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 6","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143770592","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Phase segregation of aged MgCSZ–MgO directionally solidified eutectic composites 时效MgCSZ-MgO定向凝固共晶复合材料的相偏析

IF 3.5 3区材料科学

Journal of the American Ceramic Society Pub Date : 2025-02-23 DOI: 10.1111/jace.20443

Patricia B. Oliete, Rosa I. Merino, Jose I. Peña, María Luisa Sanjuán

{"title":"Phase segregation of aged MgCSZ–MgO directionally solidified eutectic composites","authors":"Patricia B. Oliete, Rosa I. Merino, Jose I. Peña, María Luisa Sanjuán","doi":"10.1111/jace.20443","DOIUrl":"https://doi.org/10.1111/jace.20443","url":null,"abstract":"The improvement of the thermomechanical properties of Mg-partially stabilized zirconia after appropriate thermal treatments is well known. Most studies in this subject have been conducted in polycrystalline materials produced by solid-state reaction. In this work, we analyze the segregation behavior and mechanical properties of solidified eutectic composites of the ZrO2–MgO system, where MgO lamellae or fibers are embedded into a cubic Mg-stabilized zirconia (MgCSZ) containing ∼18 mol% MgO. The eutectics have been aged at 1240 or 1225°C for periods varying between 2 and 24 h. This treatment results in the progressive phase separation of the MgCSZ matrix into different mixtures of tetragonal (t), monoclinic (m), δ (Mg2Zr5O12), and MgO phases. Two types of segregation are observed, according to whether the Mg-rich phase is the metastable δ phase (type I) or MgO (type II). Both types may coexist in the same sample but type I predominates at 1240°C and type II at 1225°C. Type I is mainly of the t + δ type, although for long ageing time the t precipitates transform to monoclinic symmetry, resulting in a final m + δ segregation scheme. In type II segregation, the monoclinic phase is the main Mg-poor product. Hardness and toughness have been studied by the Vickers indentation method. The indentation fracture toughness KIC increases progressively with ageing time and for 24 h treatment is more than doubled with respect to the as-processed eutectic, while the hardness decreases slightly.","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 6","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143770591","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Strength enhancement of laser 3D-printed SiC green bodies by epoxy resin and phenolic resin dual binders 环氧树脂和酚醛树脂双粘结剂增强激光3d打印SiC绿体的强度

IF 3.5 3区材料科学

Journal of the American Ceramic Society Pub Date : 2025-02-22 DOI: 10.1111/jace.20455

Li Wang, Jie Yin, Huisheng Tian, Xiao Chen, Kanglong Wang, Zhengren Huang

引用次数: 0

Rapid synthesis of high-strength porous Si3N4 ceramics based on spontaneous solidification of multi-phase particles 基于多相颗粒自发凝固的高强度多孔Si3N4陶瓷的快速合成

IF 3.5 3区材料科学

Journal of the American Ceramic Society Pub Date : 2025-02-22 DOI: 10.1111/jace.20441

Shile Chen, Lujia Han, Jiangtao Li, Yanhao Dong, Chang-An Wang

{"title":"Rapid synthesis of high-strength porous Si3N4 ceramics based on spontaneous solidification of multi-phase particles","authors":"Shile Chen, Lujia Han, Jiangtao Li, Yanhao Dong, Chang-An Wang","doi":"10.1111/jace.20441","DOIUrl":"https://doi.org/10.1111/jace.20441","url":null,"abstract":"Porous silicon nitride ceramics have garnered significant attention due to their exceptional combination of structural and functional properties. Nevertheless, β-grain growth is frequently accompanied by inhomogeneous shrinkage of the porous structure, rendering porous silicon nitride challenging in terms of both strength and application possibilities. Furthermore, the preparation process is also inefficient and energy consuming, which constrains its development. Here, we present a novel route that relies on the spontaneous solidification-combustion process to fabricate high strength porous silicon nitride with a homogeneous microstructure. The spontaneous solidification of multi-phase particles (Si-Si3N4-Y2O3) in the Isobam aqueous gelling system is successfully realized by the mechanochemistry for the first time. The rapid combustion reaction creates a homogeneous morphological structure consisting of inlaid acicular β-Si3N4 grains that exhibit excellent mechanical strength. It provides efficient and economical green manufacturing technology for preparing high-performance structural porous ceramics based on complex multi-phase gelling systems.","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 6","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143770140","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Atomic-scale oxidation mechanism of high-entropy carbides via density functional theory and ab initio molecular dynamics 基于密度泛函理论和从头算分子动力学的高熵碳化物原子尺度氧化机理研究

IF 3.5 3区材料科学

Journal of the American Ceramic Society Pub Date : 2025-02-22 DOI: 10.1111/jace.20448

Yang Bai, Yuxin Liang, Juan Bi, Baoning Cui, Zhaopeng Lu, Huangxuan Wang, Xixi You, Bangsheng Li

{"title":"Atomic-scale oxidation mechanism of high-entropy carbides via density functional theory and ab initio molecular dynamics","authors":"Yang Bai, Yuxin Liang, Juan Bi, Baoning Cui, Zhaopeng Lu, Huangxuan Wang, Xixi You, Bangsheng Li","doi":"10.1111/jace.20448","DOIUrl":"https://doi.org/10.1111/jace.20448","url":null,"abstract":"High-entropy carbides (HECs) are increasingly recognized as promising materials for high-temperature applications, thanks to their remarkable mechanical properties and resistance to oxidation. This study investigates the initial oxidation mechanisms of HEC (Zr₀.₂₅Hf₀.₂₅Nb₀.₂₅Ta₀.₂₅)C through density functional theory and ab initio molecular dynamics simulations. Our results indicate that the (100) surface exhibits the highest stability, where oxygen molecules dissociate into atoms that preferentially adsorb at the threefold hollow site. Further analysis shows that oxygen atoms preferentially bond with Zr and Hf atoms, leading to the formation of oxides. The interaction between oxygen and the surface exhibits mixed ionic–covalent characteristics. Furthermore, oxygen atoms diffuse from the surface to subsurface octahedral sites via tetrahedral interstitial sites, with a migration barrier slightly above that of corresponding binary carbides. This research enhances our understanding of the oxidation resistance in HECs.","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 6","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143770144","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Blue/blue–violet-emitting phosphate phosphors for full-spectrum white light-emitting diodes 全光谱白光发光二极管用蓝色/蓝紫色磷光体

IF 3.5 3区材料科学

Journal of the American Ceramic Society Pub Date : 2025-02-22 DOI: 10.1111/jace.20442

Shuifu Liu, Rujun Yang, Rong-Jun Xie

{"title":"Blue/blue–violet-emitting phosphate phosphors for full-spectrum white light-emitting diodes","authors":"Shuifu Liu, Rujun Yang, Rong-Jun Xie","doi":"10.1111/jace.20442","DOIUrl":"https://doi.org/10.1111/jace.20442","url":null,"abstract":"Violet light, a component of sunlight, is critical for human health, but it is usually ignored in classic white light-emitting diodes (LEDs) that are fabricated by pumping green, yellow, or red phosphors by blue LEDs. To realized full-spectrum white LEDs for healthy lighting, it is required to replace blue LEDs by near-ultraviolet (n-UV) or violet LEDs to pump multi-color phosphors. Herein, we reported blue and/or blue–violet phosphors of Na3KMg7P6O24:Eu2+ (NKMPO:Eu2+) and Na3K1–ySryMg7–yLiyP6O24:Eu2+ (NKSMLPO:Eu2+) that can be efficiently excited by n-UV and violet LEDs. The NKSMLPO:Eu2+ phosphor (y = 0.1), showing a small thermal quenching, had a photoluminescence quantum yield of 64.9% and 41.2% under 365 and 405 nm excitation, respectively. Full-spectrum white LEDs were obtained by combining n-UV or violet LEDs with the blue/blue–violet-emitting NKSMLPO:Eu2+ and other commercial phosphors, which show a correlated color temperature of 4285–4705 K and a maximal color rendering index of 98.4. It confirms that the NKSMLPO:Eu2+ phosphors can be adopted as a violet light filler for producing sunlight-like white LEDs.","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 6","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143770145","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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