International Journal of Applied Ceramic Technology最新文献

{"title":"Strength and microstructure evolutions of calcium aluminate cement bonded alumina-spinel castables containing Cr2O3 in the presence of ZnO","authors":"Jintong Liu,&nbsp;Yifan Dong,&nbsp;Xin Qiu,&nbsp;Haoxuan Ma,&nbsp;Tianqin Li,&nbsp;Xinhong Liu,&nbsp;Quanli Jia","doi":"10.1111/ijac.15048","DOIUrl":"https://doi.org/10.1111/ijac.15048","url":null,"abstract":"<p>Unfired calcium aluminate cement (CAC) bonded alumina-spinel based plug precasts have many advantages including energy saving, shorter placement period, lower cost and good thermal shock resistance in comparison with fired purging plugs. Unfortunately, their strength was drastically decreased in the range of 700°C–1000°C, which was attributed to the destruction of the hydrates network of the castables, and structural spalling was also occurred because of their lower strength. To respond these, a feasible method to fabricate higher strength of unfired precast was proposed by adding ZnO powders, and the effect of the ZnO content on the microstructure and properties of the castables was studied in this paper. Results demonstrate that cold strength of the specimens after heat-treating at different temperatures increases significantly by rising of the ZnO level, permanent linear change of the castables after firing at 1400°C and 1600°C decreases, and hot strength value noticeably increases from 36.3 to 58.4 MPa, exhibited that cold and hot strength of CAC bonded castables significantly improve via adding ZnO powders. Strengthening mechanism on the strength of ZnO-bearing castables is ascribed to formation of ZnAl₂O₄ and ZnCr₂O₄, and their strengthening effect is much higher than that of the weakening effect by CAC hydration products fired at 600°C–1000°C, and this strength reinforcing effect is intensified with rising of heat-treating temperature. In addition, ZnCr₂O₄ and ZnAl₂O₄ can dispense in MA spinel grains to form spinel solid solution at 1400°C–1600°C, (Al₁₋<i>_x</i>Cr<i>_x</i>)₂O₃ solid solution is formed via Cr₂O₃ reacts with Al₂O₃. Those favor the densification process of the matrix structure, creating strength reinforcing effect of the ZnO-containing castables, thereby significantly increase their strength.</p>","PeriodicalId":13903,"journal":{"name":"International Journal of Applied Ceramic Technology","volume":"22 3","pages":""},"PeriodicalIF":1.8,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143770576","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High energy storage performance in ferroelectric ceramics (1−x)(0.67BiFeO3−0.33BaTiO3)−x(Sr0.8Ce0.1TiO3)","authors":"Shaowei Gao,&nbsp;Wei Li,&nbsp;Xiang He,&nbsp;Dongfang Pang","doi":"10.1111/ijac.15023","DOIUrl":"https://doi.org/10.1111/ijac.15023","url":null,"abstract":"<p>In this work, Sr_0.8Ce_0.1TiO₃ (SCT) was doped into BiFeO₃–BaTiO₃ (BF–BT) to form a ternary solid solution with relaxor ferroelectric characteristics. Constricted <i>P</i>–<i>E</i> loops were observed due to the composition-induced phase transition, and a significant grain size reduction was observed in the SCT-doped ceramics. The elongated <i>P</i>–<i>E</i> hysteresis loops revealed that the ternary system had good energy storage characteristics. BF–BT–0.4SCT ceramics possessed the maximum recoverable energy storage (<i>W</i>_rec) of 1.94 J/cm³ and efficiency (<i>η</i>) of 76.1 % under an electric field of 190 kV/cm. More importantly, the BF–BT–0.4SCT ceramic exhibited excellent fatigue endurance (<i>∆W</i>_rec<i></i>&lt; 1.1%, after 10³ fatigue cycles) under an electric field of 100 kV/cm, superior to most previous works. At the same time, the BF–BT–0.4SCT ceramic also showed high frequency stability, and fast discharge rate (<i>t</i>_0.9 &lt; .05 µs). In addition, the BF–BT–0.4SCT ceramic also exhibited considerable charging–discharging performance with a relatively high current density (127 A/cm²) and power density (5.8 MW/cm³). Therefore, this work helps broaden the development of BF-based and other lead-free ceramics for energy storage applications.</p>","PeriodicalId":13903,"journal":{"name":"International Journal of Applied Ceramic Technology","volume":"22 3","pages":""},"PeriodicalIF":1.8,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143770575","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Anisotropic response of bidirectionally ice-templated alumina/epoxy composites","authors":"Sudhendu N. Tiwari,&nbsp;Vinay Kumar,&nbsp;Prabhat K. Agnihotri","doi":"10.1111/ijac.15050","DOIUrl":"https://doi.org/10.1111/ijac.15050","url":null,"abstract":"<p>This work investigates the anisotropic response of nacre-like lamellar alumina/epoxy composites at low and high strain rates. Ice-templated alumina with long-range aligned porous lamellar structures is fabricated at 20 vol% of ceramic part using bidirectional freeze casting method. The obtained porous structures are infiltrated with epoxy to fabricate lamellar alumina/epoxy composites. The compressive tests are performed on scaffolds and composites at different orientations relative to the freezing direction. The testing results reveal that infiltration has increased the uniaxial compressive strength of the scaffold substantially. The compressive properties are higher when loaded along the freezing direction, and it decreases when it is loaded away from the freezing direction. The strength of the composites exhibited a strong dependency on the loading direction and strain rates.</p>","PeriodicalId":13903,"journal":{"name":"International Journal of Applied Ceramic Technology","volume":"22 3","pages":""},"PeriodicalIF":1.8,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143770133","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fracture toughness degradation of rare earth zirconate-yttria-stabilized zirconia (RE = Sm and Gd) composite after high-temperature treatment","authors":"Chuan Sun,&nbsp;Pengfei He,&nbsp;Zhenfeng Hu,&nbsp;Xiubing Liang,&nbsp;Xiangyang Liu,&nbsp;Chunlei Wan","doi":"10.1111/ijac.15047","DOIUrl":"https://doi.org/10.1111/ijac.15047","url":null,"abstract":"<p>Thermal barrier coatings are mandated to exhibit exceptional mechanical properties, particularly high toughness, for enhanced thermal cycling durability. However, many newly developed materials exhibit low fracture toughness, limiting their performance. To address this challenge, composite coatings have emerged as a strategic approach to enhance thermal shock resistance. This study delves into the toughening influence of yttria-stabilized zirconia (YSZ) on rare earth zirconate (RE₂Zr₂O₇, REZ) composites (RE = Sm or Gd). After sintering at 1300°C for 100 h, the absence of a monoclinic phase in REZ-YSZ is attributed to the diffusion of rare earth elements into YSZ. Notably, while REZ-YSZ composite coatings exhibit higher fracture toughness initially, they experience a decline in this property with prolonged sintering time. Our research highlights a significant finding in the development of YSZ-toughened TBC materials.</p>","PeriodicalId":13903,"journal":{"name":"International Journal of Applied Ceramic Technology","volume":"22 3","pages":""},"PeriodicalIF":1.8,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143770274","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Molecular dynamics simulations of the structure–property relationship in PCS-derived Si–C ceramics","authors":"Pengfei Zhang,&nbsp;Qiuyan Li,&nbsp;Kang Guan,&nbsp;Xiaoli Fan,&nbsp;Qingfeng Zeng,&nbsp;Longteng Bai,&nbsp;Xiaohui Yang","doi":"10.1111/ijac.15041","DOIUrl":"https://doi.org/10.1111/ijac.15041","url":null,"abstract":"<p>Polycarbosilane (PCS) pyrolysis is a common method for synthesizing silicon carbide (SiC). However, the relationship between structure and properties during PCS pyrolysis is not well understood, and monitoring thermomechanical properties during the process is challenging. Few studies have examined the evolution of PCS performance during pyrolysis. Therefore, investigating the evolution of the structure–property relationship during PCS pyrolysis is essential. In this study, a reliable model was developed to track crosslinking, inorganic transformations, and gas release during PCS pyrolysis. Molecular dynamics (MD) simulations were used to elucidate the evolution of the structure–property relationship in PCS-derived Si–C ceramics. The results show a direct correlation between the microstructure and properties of Si–C ceramics, with our predictions closely matching experimental data. This indicates that these models can effectively estimate thermomechanical properties that are difficult to measure experimentally. Furthermore, our work offers a systematic approach to quantifying the structure–property relationship based on the primary reactions in the pyrolysis system, facilitating the tailoring of the structure to meet specific performance criteria.</p>","PeriodicalId":13903,"journal":{"name":"International Journal of Applied Ceramic Technology","volume":"22 3","pages":""},"PeriodicalIF":1.8,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143770621","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of (W,Ti,Ta)C/CaF2 nano-self-lubricating cermet tool and its dual lubrication cutting mechanism","authors":"Mingdong Yi,&nbsp;Long Zhao,&nbsp;Zhihui Zhang,&nbsp;Yansong Yu,&nbsp;Yunchu Bao,&nbsp;Jiaxiang Wang,&nbsp;Ting Shan,&nbsp;Jingjie Zhang,&nbsp;Hui Chen,&nbsp;Zhaoqiang Chen,&nbsp;Guangchun Xiao,&nbsp;Chonghai Xu","doi":"10.1111/ijac.15036","DOIUrl":"https://doi.org/10.1111/ijac.15036","url":null,"abstract":"<p>A (W,Ti,Ta)C/CaF₂ nano-self-lubricating cermet tool was prepared by spark plasma coupling high-frequency induction sintering (SP–HF sintering) process. Under the optimal sintering parameters, nano CaF₂ was uniformly distributed within the matrix grain, forming an intragranular nanostructure. When the content of nano CaF₂ is 5 vol.%, the flexural strength, hardness, and fracture toughness of (W,Ti,Ta)C/CaF₂ nano-self-lubricating cermet tool were 1134 ± 28 MPa, 18.97 ± 0.22 GPa, and 8.52 ± 0.16 MPa·m^1/2, respectively. The antifriction mechanism in turning of Cr12 steel was studied with nano solid lubricating technology and minimum quantity lubrication (MQL) technology. The results showed that nano CaF₂ diffused into the internal friction zone during the cutting process to form a lubricating film, and the MQL technology provided a lubrication effect in the external friction zone. The combination of solid lubrication and minimum quantity lubrication reduced the cutting force, cutting temperature, metamorphic layer thickness, and oxidation degree. The dual lubrication mode significantly improved the wear resistance of the tool. Under the conditions of cutting speed <i>v_c</i>= 300 m/min, back engagement <i>a_p</i>= 0.15 m/min, and feed rate <i>f </i>= 0.102 mm/r, the tool life was about 15 000 m, and the stable wear stage was effectively extended. The surface roughness of the workpiece within the effective cutting distance was about 0.630 µm.</p>","PeriodicalId":13903,"journal":{"name":"International Journal of Applied Ceramic Technology","volume":"22 3","pages":""},"PeriodicalIF":1.8,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143770390","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preparation and dynamics of silicate based sintered materials using high content solid waste","authors":"Minglong Ma,&nbsp;He Yang,&nbsp;Shengnan Liu,&nbsp;Miao Zhou,&nbsp;Yuzheng Wang","doi":"10.1111/ijac.15026","DOIUrl":"https://doi.org/10.1111/ijac.15026","url":null,"abstract":"<p>In this paper, steel slag and fly ash as the main raw materials, silicate-based sintering materials (SBSM) were prepared by using high-temperature firing method. The effects of steel slag addition and firing temperature on the linear shrinkage, water absorption, bulk density, and compressive strength parameters of SBSM were studied. The results show that with the increase of steel slag addition and firing temperature, the water absorption rates of SBSM show a trend of first decreasing and then increasing; the volume density, shrinkage rate, and compressive strength show a trend of first increasing and then decreasing. The main phase of SBSM is anorthite; however, a higher amount of steel slag and higher firing temperature can promote the formation of pyroxene phase. The microstructure composed of anorthite, pyroxene, and glass phases is similar to that of “reinforced concrete,” which is more conducive to improving the strength and toughness of the SBSM. By calculating the crystallization activation energy and crystal index, a crystal activation energy of 50.72 kJ/mol is obtained, which is helpful for crystal formation. The crystal index is 1.22, indicating that the crystallization mode in the SBSM is surface crystallization.</p>","PeriodicalId":13903,"journal":{"name":"International Journal of Applied Ceramic Technology","volume":"22 3","pages":""},"PeriodicalIF":1.8,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143770211","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Interfacial microstructure and mechanical properties of B4C/TC4 brazed joints based on Ag–Cu–Ti + AlN/Mo foil/Nb foil","authors":"Zhaoran Chen,&nbsp;Zhaoquan Zhang,&nbsp;Xuejian Liu","doi":"10.1111/ijac.15019","DOIUrl":"https://doi.org/10.1111/ijac.15019","url":null,"abstract":"<p>The bonding between titanium alloy (TC4) and B₄C ceramics was enhanced by employing a Mo foil/AgCuTi–AlN/Nb foil sandwich composite filler. The impact of varying AlN contents and brazing temperatures on the microstructure and mechanical attributes of the joints was explored. The joint strength was augmented through the utilization of AlN doping modification, which had a low expansion coefficient, and the plastic deformation of Mo and Nb foils. The findings revealed that AlN doping could refine the brazing organization of the joint, and the outstanding plasticity of Mo/Nb foils adapted to greater strain mismatches through elastic deformation. The most effective system emerged as nickel-plated B₄C + Mo foil + AgCuTi–3 wt% AlN + Nb foil + TC4, which achieved the highest shear strength of approximately 109 MPa. This represents an enhancement of about 1.5 times compared to the shear strength of the system lacking additional brazing material.</p>","PeriodicalId":13903,"journal":{"name":"International Journal of Applied Ceramic Technology","volume":"22 3","pages":""},"PeriodicalIF":1.8,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143770306","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Microstructural origin of high-strength Tyranno SA4 SiC fiber studied by comparative Raman spectroscopy#","authors":"Kaylyn Stewart,&nbsp;Benjamin Lamm,&nbsp;Takaaki Koyanagi","doi":"10.1111/ijac.15032","DOIUrl":"https://doi.org/10.1111/ijac.15032","url":null,"abstract":"<p>Tyranno SA4 grade SiC fiber is an emerging continuous fiber with excellent mechanical properties. The origin of the fiber's high-performance was studied by comparative Raman spectroscopy of four different grades of SiC fibers and reference SiC monolith. Analysis of the Raman spectra of fiber cross-sections, surface and homogeneity, and fibers under stress, revealed how differences in microstructure, such as crystalline order, size, and the presence of critical flaws, dictate mechanical properties. This information can help optimize SiC fiber manufacturing.</p>","PeriodicalId":13903,"journal":{"name":"International Journal of Applied Ceramic Technology","volume":"22 3","pages":""},"PeriodicalIF":1.8,"publicationDate":"2025-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143770266","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fatigue durability of an environmental barrier coating–coated two-dimensional woven SiC/SiC composite at elevated temperatures in a steam environment","authors":"R. T. Bhatt,&nbsp;S. Kalluri,&nbsp;K. N. Lee,&nbsp;J. Stuckner","doi":"10.1111/ijac.15038","DOIUrl":"https://doi.org/10.1111/ijac.15038","url":null,"abstract":"<p>Sustained-peak low-cycle fatigue tests in a steam environment were conducted on uncoated and environmental-barrier-coated SiC-fiber-reinforced SiC-matrix (SiC/SiC) composites at 1204 and 1315°C with an <i>R</i> ratio of 0.5 at maximum stresses from 69 to 138 MPa for up to 500-h run-out or failure. The composites were fabricated by the melt-infiltration process and contained Sylramic-iBN SiC fibers. The run-out specimens were tensile tested at room temperature to measure residual tensile properties. Computed tomography, microstructural analysis, and fractography of the failed specimens were conducted. Results indicate that at a constant temperature and stress, mechanical cycling causes environmental barrier coating (EBC) damage with increasing exposure time. Moreover, at a fixed exposure time and stress, damage increases with increasing temperature. Breaching of the EBC followed by moisture-assisted damage and crack growth within the SiC/SiC substrate dictates durability of EBC SiC/SiC composites. The damage and failure mechanisms of the composites are discussed.</p>","PeriodicalId":13903,"journal":{"name":"International Journal of Applied Ceramic Technology","volume":"22 3","pages":""},"PeriodicalIF":1.8,"publicationDate":"2025-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143770500","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}