Shu Yan, Chenyang He, Man Zhang, Wenguang Wang, Shengwei Wang
{"title":"Facile preparation and properties of foamed fly-ash/slag-based hollow glass microspheres/geopolymer composites","authors":"Shu Yan, Chenyang He, Man Zhang, Wenguang Wang, Shengwei Wang","doi":"10.1111/ijac.14993","DOIUrl":"https://doi.org/10.1111/ijac.14993","url":null,"abstract":"<p>In order to reuse the multiple solid waste and improve the porosity of geopolymer composites, a unique foaming process was developed to fabricate novel green foamed fly-ash/slag-based hollow glass microspheres/geopolymer (HGMs/FSGP) composites. A thorough investigation was carried out on the synergic effects of cetyltrimethylammonium bromide (CTAB), hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) and HGMs on the microstructure, strength and thermal conductivity. Results showed that the foamed HGMs/FSGP composites with the amorphous structure could be fabricated by foaming combined with HGMs at room temperature. The density of the samples changed from 1.16 to 0.47 g/cm<sup>3</sup> with 1–5 wt.% H<sub>2</sub>O<sub>2</sub>. The acceptable compressive strength (0.71–15.05 MPa) of the HGMs/FSGP composites was attributed to the fractured HGMs, the good bond between HGMs and geopolymer matrix, and crack deflection across the HGMs. With proper H<sub>2</sub>O<sub>2</sub> and HGMs, the composites obtained their lowest thermal conductivity of 0.116 W/(m⋅K), which could find use in insulation fields.</p>","PeriodicalId":13903,"journal":{"name":"International Journal of Applied Ceramic Technology","volume":"22 3","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143770064","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":"Densification behavior of ultrafine WC-based composites with AlxCoCrCuFeNi high-entropy alloy binders","authors":"Wenyan Luo, Yunzhong Liu","doi":"10.1111/ijac.15002","DOIUrl":"https://doi.org/10.1111/ijac.15002","url":null,"abstract":"<p>Ultrafine WC-based cemented carbides with 10 wt.%Al<i><sub>x</sub></i>CoCrCuFeNi high-entropy alloy (HEA) binders were fabricated by spark plasma sintering, and the effects of HEA binders on the densification behavior of the WC-HEA cemented carbides were studied. The densification of the WC-HEA cemented carbide, as well as traditional WC-Co, can be divided into the slow densification stage, rapid densification stage, and final densification stage. The densification behavior of the WC-HEA cemented carbides largely depends on the performance of the HEA binder during the SPS process. The sluggish diffusion effect of HEA weakens the diffusion of W atom on the powder particle surface and inhibits the growth of WC grain. Consequently, the disappearance of pores in the sintered compact is hindered, which leads to a low relative density of the WC-HEA cemented carbide. With the increase of Al content, the inhibitory effect of the Al<i><sub>x</sub></i>CoCrCuFeNi binder on the growth of WC grain is suppressed, and an Al-containing phase with a low melting point is more likely to form. Therefore, the relative density of the WC-10 wt.%Al<i><sub>x</sub></i>CoCrCuFeNi cemented carbide raises linearly with increasing Al content of the HEA binder.</p>","PeriodicalId":13903,"journal":{"name":"International Journal of Applied Ceramic Technology","volume":"22 3","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143770058","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":"Influence of high-iron bauxite on phase composition, microstructure, and properties of bauxite-based homogenized grogs","authors":"Qianli Ma, Yanchen Liang, Renhong Yu, Yunfei Zang, Yuchi Liu, Minghao Wang, Huaiqi Ma, Xiaorui Yu","doi":"10.1111/ijac.14998","DOIUrl":"https://doi.org/10.1111/ijac.14998","url":null,"abstract":"<p>Investigation on the occurrence state of Fe<sub>2</sub>O<sub>3</sub> in bauxite and its effect on the bauxite-based homogenized grogs (BHG) is crucial for the utilization of high-iron bauxite resources. BHG with different Fe<sub>2</sub>O<sub>3</sub> contents incorporated in the form of high-iron bauxite was prepared by maintaining the Al<sub>2</sub>O<sub>3</sub> content around 82%. The effect of high-iron bauxite addition (0, 25, 50 75, 100 wt.%) on the phase composition and microstructure evolution was studied using X-ray diffractometer, scanning electron microscope, and Factsage software. The results show that part of the Fe<sub>2</sub>O<sub>3</sub> in BHG is dissolved into crystalline phases, while the other part is present as a glass phase. The addition of high-iron bauxite, coupled with a reduction in the SiO<sub>2</sub> content, results in a rise in the corundum content within BHG from 55.0% to 93.6% and a decrease in the mullite content from 44.0% to 2.8%. This change results in a decline in the refractoriness under load of T0.6, dropping from 1593.5°C in the sample without high-iron bauxite to 1430.7°C in the sample with 100% high-iron bauxite addition. The microstructure of BHG evolves from the interconnected network of corundum and mullite phases to the structure of corundum bonded by the glass phase.</p>","PeriodicalId":13903,"journal":{"name":"International Journal of Applied Ceramic Technology","volume":"22 3","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143769956","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}
Marcela Figueroa-Arteaga, Aloadir L. S. Oliveira, Ducinei Garcia, Fabio L. Zabotto, Claudia F. V. Raigoza
{"title":"Combustion synthesis and spark plasma sintering processing of (1-x)Ba(Zr₀.₂Ti₀.₈)O₃-x(Ba₀.₇Ca₀.₃)TiO₃ ceramics","authors":"Marcela Figueroa-Arteaga, Aloadir L. S. Oliveira, Ducinei Garcia, Fabio L. Zabotto, Claudia F. V. Raigoza","doi":"10.1111/ijac.14995","DOIUrl":"https://doi.org/10.1111/ijac.14995","url":null,"abstract":"<p>Solution combustion synthesis (SCS) has proven to be one of the simplest and fastest methods, using inexpensive materials and resulting in homogeneous stoichiometry with nanometric particle sizes. The spark plasma sintering (SPS) method has been used to obtain high-density ceramic materials with excellent control of microstructure. This work reports the successful combination of these two techniques for the fabrication of the high-density lead-free ferroelectric system (1-<i>x</i>)Ba(Zr<sub>₀.₂</sub>Ti<sub>₀.₈</sub>)O<sub>₃-</sub><i><sub>x</sub></i>(Ba<sub>₀.₇</sub>Ca<sub>₀.₃</sub>)TiO<sub>₃</sub>. The X-ray diffraction of the powder indicates the majority formation of the perovskite structure and other residual reaction products, indicating a reactive powder. The SPS method resulted in highly densified samples, reaching relative density values close to 99% with a single-phase perovskite structure. Rietveld refinement revealed the presence of at least two perovskite phases, independent of calcium concentration. Dielectric measurements showed anomalies in both the real and imaginary parts of the dielectric permittivity, which are typical of phase transitions and a low dielectric loss for all compositions. This study shows that the combined use of SCS and SPS technique can be a powerful protocol to produce dense, fine-grained lead-free ferroelectric ceramics at relatively low temperatures and in short time periods.</p>","PeriodicalId":13903,"journal":{"name":"International Journal of Applied Ceramic Technology","volume":"22 3","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143770094","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":"Effect of different sintering process on mechanical properties and microstructure of TiB2-TiN-based cermet material","authors":"Zhengyi Han, Guangchun Xiao, Hui Chen, Mingdong Yi, Jingjie Zhang, Zhaoqiang Chen, Chonghai Xu","doi":"10.1111/ijac.14992","DOIUrl":"https://doi.org/10.1111/ijac.14992","url":null,"abstract":"<p>TiB<sub>2</sub>-TiN-NiTi cermet material was prepared by spark plasma sintering technology (SPS). The effects of the sintering process on their relative density, mechanical properties, and microstructure were studied with 74TiB<sub>2</sub>-20TiN-6NiTi as the composition system. The results showed that TiB<sub>2</sub>-TiN-based cermet material with the best mechanical properties was prepared under the sintering temperature of 1650°C and the holding time of 5 min. The relative density, flexural strength, fracture toughness, and hardness are 97.7%, 762.7 MPa, 5.5 MPa·m<sup>1/2</sup>, and 18.47 GPa, respectively. However, if the holding time keeps for 3 min under the sintering temperature of 900°C and then 5 min under the sintering temperature of 1650°C, the relative density, flexural strength, fracture toughness, and hardness of TiB<sub>2</sub>-TiN-based cermet reach 99.1%, 931.3 MPa, 5.8 MPa·m<sup>1/2</sup>, and 19.15 GPa, respectively. In comparison, they have been greatly improved by 1.4%, 22.1%, 5.5%, and 3.7%, respectively. The final holding time can also affect the mechanical properties of TiB<sub>2</sub>-TiN-based cermet material. When it is higher than 5 min, it will cause irregular growth and abnormal growth of grains, which can decrease the flexural strength of TiB<sub>2</sub>-TiN-based cermet material.</p>","PeriodicalId":13903,"journal":{"name":"International Journal of Applied Ceramic Technology","volume":"22 3","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143769955","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":"Improving fracture toughness and densification behavior of single-phase TaC–HfC ceramic with carbon additives","authors":"Firouz Rezaei, Mahdi Ghassemi Kakroudi, Vahideh Shahedifar, Zohre Balak","doi":"10.1111/ijac.15000","DOIUrl":"https://doi.org/10.1111/ijac.15000","url":null,"abstract":"<p>This investigation was undertaken to determine the role of carbon additives on the densification behavior and fracture toughness of TaC–HfC ceramic. The composition of TaC-19 vol% HfC-5 vol% VC with 10 vol% nano graphite/10 vol% nano carbon black was sintered by hot-pressing (HP) method. Also, the sintering temperature varied from 1700°C to 2000°C. Vanadium carbide was used as a sintering aid to minimize the porosity for the given hot-pressing temperatures while keeping the consolidation temperature low. The analysis of XRD patterns revealed that the sintering process led to the formation of a ternary solid solution in the samples accompanied by the entire consumption of HfC and VC phases. Also, the presence of carbon additives increased the relative density from 96% to 100% by enhancing the sintering temperature from 1700°C to 2000°C. It was significantly higher than the carbon-free sample, which had a maximum value of 96.7% at 2000°C. The results also indicated that the maximum fracture toughness of 7.1 MPa.m<sup>1/2</sup> was obtained for nano carbon black contained samples at the sintering temperature of 1900°C and above. The toughening mechanisms in samples were discussed, too.</p>","PeriodicalId":13903,"journal":{"name":"International Journal of Applied Ceramic Technology","volume":"22 3","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143769967","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}
James Braun, Clémentine Fellah, Christine Labrugère, Mélanie Vaudescal, Cédric Sauder
{"title":"Characterization of the Tyranno SA4 third generation SiC fiber surface and comparison with Tyranno SA3 and HNS fibers","authors":"James Braun, Clémentine Fellah, Christine Labrugère, Mélanie Vaudescal, Cédric Sauder","doi":"10.1111/ijac.14988","DOIUrl":"https://doi.org/10.1111/ijac.14988","url":null,"abstract":"<p>While presenting similar properties, the Hi-Nicalon Type S (HNS) and Tyranno SA3 (TSA3) SiC fibers exhibit different mechanical behaviors when used as reinforcement in SiC/SiC composites. Indeed, the HNS-reinforced composites exhibit a pseudoductile mechanical behavior whereas the TSA3-based composites show low ductility. Even though the differences in their grain size and surface roughness could explain a part of this phenomenon, the chemical composition and microstructure of the fibers outermost surface play a key role. The recent availability of the new Tyranno SA4 (TSA4) SiC fiber allowed the processing of composites showing the expected pseudoductile mechanical behavior in ceramic matrix composites, even without an interphase. Therefore, this result shows that the TSA4 surface should be different from its predecessors. In order to characterize the surface, X-ray photoelectron spectroscopy (XPS), auger electron spectroscopy (AES), and transmission electron microscopy (TEM) were performed on the HNS, TSA3, and TSA4 fibers. The presence of an organized boron nitride layer of dozens of nanometers in thickness on the TSA4 fiber surface was evidenced. This layer already acts as an interphase material, guaranteeing cracks deflection, and is responsible for the pseudoductile behavior of composites made of this new fiber, reducing the interfacial shear stress at the fiber/matrix interface.</p>","PeriodicalId":13903,"journal":{"name":"International Journal of Applied Ceramic Technology","volume":"22 3","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ijac.14988","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143770638","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Densification of ceramics and ceramic-based composites using ultralow temperature sintering (cold sintering): A comprehensive review","authors":"Gecil Evangeline T, Raja Annamalai A","doi":"10.1111/ijac.14996","DOIUrl":"https://doi.org/10.1111/ijac.14996","url":null,"abstract":"<p>This article provides a concise overview of cold sintering, a technique for densification of ceramics and ceramic-based composites at ultralow temperatures. It emphasizes the incorporation of various materials including oxides, fluorides, bromides, carbonates, chlorides, and phosphates during the cold sintering process. Cold sintering achieves densification through high-pressure dissolution and precipitation using liquids like water as a medium. For multi-material devices, this ultralow temperature method offers a promising solution for combining materials with diverse thermal properties leading to novel integrated materials. Numerous materials have been effectively integrated at extremely low temperatures achieving properties comparable to those of traditional methods; this review comprehends their perspective on the wet consolidation mechanism.</p>","PeriodicalId":13903,"journal":{"name":"International Journal of Applied Ceramic Technology","volume":"22 2","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143120660","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}
Sushanta Kumar Mohapatra, H. S. Maharana, K. Annapurna
{"title":"Tm3+-doped mixed alkaline-earth zinc-silico-calcium aluminate glasses: A promising material for near-infrared laser","authors":"Sushanta Kumar Mohapatra, H. S. Maharana, K. Annapurna","doi":"10.1111/ijac.14997","DOIUrl":"https://doi.org/10.1111/ijac.14997","url":null,"abstract":"<p>This work is focused on the concentration-dependent study of Tm<sub>2</sub>O<sub>3</sub> (0.05, 0.1, 0.25, 0.5, and 0.75 mol%) doped zinc-silico-calcium aluminate glasses for infrared emission. The amorphous nature and good thermal stability (Δ<i>T</i> > 150°C) of prepared glasses are confirmed by X-ray diffraction and differential scanning calorimetry, respectively. The decrease in glass transition temperature and optical band gap, coupled with the increasing trend in optical basicity, linear thermal expansion, molar volume, and oxygen packing density with Tm<sup>3+</sup> ions concentration, suggests their preference for non-bridging oxygen sites. Two emission peaks at 800 nm (<sup>3</sup>H<sub>4</sub>→<sup>3</sup>H<sub>6</sub>) and 659 nm (<sup>1</sup>G<sub>4</sub>→<sup>3</sup>F<sub>4</sub>) while another two emission peaks at 1800 nm (<sup>3</sup>F<sub>4</sub>→<sup>3</sup>H<sub>6</sub>) and 1487 nm (<sup>3</sup>H<sub>4</sub>→<sup>3</sup>F<sub>4</sub>) are observed under both 475 and 808 nm excitations, respectively. The realization of emission quenching at 800 nm beyond 0.25 mol% of Tm<sub>2</sub>O<sub>3</sub> concentration may be due to resonant energy transfer and cross-relaxation mechanism (<sup>3</sup>H<sub>4</sub>:<sup>3</sup>H<sub>6</sub>→<sup>3</sup>F<sub>4</sub>:<sup>3</sup>F<sub>4</sub>) while for 1800 nm emission, the observed quenching beyond 0.5 mol% of Tm<sub>2</sub>O<sub>3</sub> is due to the energy migration to OH<sup>−</sup> ions and reabsorption (resonant energy absorption). The modified Mc Cumber theory is used to evaluate corresponding emission cross-sections and discussed along with their gain factors for their applicability as 800 and 1800 nm laser materials.</p>","PeriodicalId":13903,"journal":{"name":"International Journal of Applied Ceramic Technology","volume":"22 3","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143770670","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":"Stabilizing MoB2 with HCP structure in (MoxHf(1‒x)/5Zr(1‒x)/5Ta(1‒x)/5V(1‒x)/5Nb(1‒x)/5)B2 via a high-entropy strategy","authors":"Yao Yang, Jianqiang Bi, Linjing Qiao, Guandong Liang, Shuyong Liang, Shushuai Liu, Shaoyin Wang, Hongyu Gong, Zhao Qian, Jinwang Shi, Weiqiang Li","doi":"10.1111/ijac.14982","DOIUrl":"https://doi.org/10.1111/ijac.14982","url":null,"abstract":"<p>The properties of molybdenum diboride are intricately tied to its crystal structure, which includes two distinct phases, α-MoB<sub>2</sub> and β-MoB<sub>2</sub>. The α-MoB<sub>2</sub> exhibits superior electrical and catalytic properties, akin to those of graphite due to the similar HCP structure. Nevertheless, the transformation between α-MoB<sub>2</sub> and β-MoB<sub>2</sub> is complicated and the formation of α-MoB<sub>2</sub> remains challenge due to higher Gibbs free energy. The MoB<sub>2</sub> powder synthesized through boro/carbothermal reduction in this study suggests the β phase, transforming into α-MoB<sub>2</sub> completely via a high-entropy strategy. It founds that the introduction of high-entropy diborides (HEB) effectively inhibits the grain growth of samples, resulting in a significant enhancement in their hardness. The potential for the formation of a single-phase between MoB<sub>2</sub> and HEB is associated with Pauling electronegativity difference, <i>δ</i><sub>χP</sub>. Furthermore, the formation of a single-phase solid solution was found to contribute to the improvement in the fracture toughness of the samples. This work presents a novel strategy for stabilizing α-MoB<sub>2</sub>, offering valuable insights into understanding phase-transition behavior in MoB<sub>2</sub> and the solid solubility in multi-component ceramics.</p>","PeriodicalId":13903,"journal":{"name":"International Journal of Applied Ceramic Technology","volume":"22 3","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143770669","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}