Journal of Materials Research最新文献

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Hydroxyapatite modified with polyhedral oligomeric silsesquioxane as a filler for dental resin-based composites 用多面体低聚硅倍半氧烷改性的羟基磷灰石作为牙科树脂基复合材料的填料
IF 2.7 4区 材料科学
Journal of Materials Research Pub Date : 2024-07-09 DOI: 10.1557/s43578-024-01385-7
Zuzanna Buchwald, Tomasz Buchwald, Adam Voelkel
{"title":"Hydroxyapatite modified with polyhedral oligomeric silsesquioxane as a filler for dental resin-based composites","authors":"Zuzanna Buchwald, Tomasz Buchwald, Adam Voelkel","doi":"10.1557/s43578-024-01385-7","DOIUrl":"https://doi.org/10.1557/s43578-024-01385-7","url":null,"abstract":"<p>Hydroxyapatite modified with methacrylate groups-bearing polyhedral oligomeric silsesquioxane was for the first time applied as a filler in the experimental composite for dental applications. As the modifier changed the hydroxyapatite surface from hydrophilic to hydrophobic, it was predicted that the stability of the obtained composites would be improved in comparison with raw hydroxyapatite-filled composites. The stability in the oral imitating environment, basic physicochemical properties, and remineralizing potential understood as the ability to release calcium ions, were examined. The distribution of the fillers in the organic matrix, composites’ degree of conversion, depth of cure, flexural and compressive strengths, sorption, and solubility after 2 and 12 weeks of incubation, and the concentrations of calcium released were examined. The results were subjected to statistical analysis. The filler modification resulted in the improvement of the composites’ mass stability during long-term incubation with simultaneous beneficial more balanced calcium release profiles and comparable physicochemical properties.</p><h3 data-test=\"abstract-sub-heading\">Graphical abstract</h3>\u0000","PeriodicalId":16306,"journal":{"name":"Journal of Materials Research","volume":"43 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141569985","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}
引用次数: 0
Analysis and simulation research on deep drawing of magnesium alloy box-shaped products with sand die based on different driving modes 基于不同驱动模式的砂模镁合金箱形产品拉深分析与仿真研究
IF 2.7 4区 材料科学
Journal of Materials Research Pub Date : 2024-07-09 DOI: 10.1557/s43578-024-01373-x
Xinyu Han, Hongyu Wang, Xinyu Wang, Jinyan Han, Sixiang Zhang
{"title":"Analysis and simulation research on deep drawing of magnesium alloy box-shaped products with sand die based on different driving modes","authors":"Xinyu Han, Hongyu Wang, Xinyu Wang, Jinyan Han, Sixiang Zhang","doi":"10.1557/s43578-024-01373-x","DOIUrl":"https://doi.org/10.1557/s43578-024-01373-x","url":null,"abstract":"<p>Deep drawing of box-shaped products is of wide interest. In this study, sand was used as a flexible medium to replace the rigid die for deep drawing of box-shaped products. This method can enable forming with reduced die cost. During the deep drawing, three driving modes were realized through different placement of the sand. To study the difference among these three driving modes, the macroscopic and microscopic cooperative verification method was adopted. At the macroscopic level, the pressure stress was analyzed by using analytical models and simulation. The stress variation rules were also obtained. At the microscopic level, the microstructure of the key regions is discussed. The results show that the maximum decrease in the average grain size was about 82.38%. The maximum proportion of deformed grains was about 4.30%. The rules governing the change in the microstructure and stress were obtained, enabling prediction of the stress distribution and the microstructure of other products obtained by using sand forming.</p><h3 data-test=\"abstract-sub-heading\">Graphical abstract</h3>\u0000","PeriodicalId":16306,"journal":{"name":"Journal of Materials Research","volume":"20 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141569984","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}
引用次数: 0
Facile fabrication of functional hyaluronic acid-/konjac glucomannan-based injectable hydrogel as wound closure and anti-microbial material for the treatment of burn wound healing 简易制备以透明质酸/魔芋葡甘露聚糖为基础的功能性可注射水凝胶,作为治疗烧伤创面愈合的伤口闭合和抗微生物材料
IF 2.7 4区 材料科学
Journal of Materials Research Pub Date : 2024-07-09 DOI: 10.1557/s43578-024-01383-9
Huiying Hao, Dan Li
{"title":"Facile fabrication of functional hyaluronic acid-/konjac glucomannan-based injectable hydrogel as wound closure and anti-microbial material for the treatment of burn wound healing","authors":"Huiying Hao, Dan Li","doi":"10.1557/s43578-024-01383-9","DOIUrl":"https://doi.org/10.1557/s43578-024-01383-9","url":null,"abstract":"<p>Hydrogel dressings with self-healing properties hold immense promise for enhancing the effectiveness of burn wound healing treatments by prolonging the lifespan of the material. In this study, a composite hydrogel combining hyaluronic acid (HA) and konjac glucomannan (KGM), referred to as HAKGM hydrogel, was synthesized using the Schiff-base reaction. The research focused on investigating the impact of varying KGM concentrations on key properties such as gelation time, swelling ratio, biodegradation, mechanical characteristics, and physico-chemical properties of the HAKGM hydrogel composite. Notably, the HAKGM hydrogel composite exhibited notable antibacterial and biofilm activities against tested microorganisms, underscoring its potential for infection control in burn wound management. Furthermore, cytotoxicity assessments on NIH/3T3 cells revealed minimal harm caused by the HAKGM hydrogel composite, suggesting its biocompatibility. Fluorescence imaging showcased the attachment and infiltration of fibroblasts into the hydrogel matrix over 24, 48, and 72 h of cell growth, indicating its ability to support cellular proliferation and tissue regeneration. Finally, in a full-thickness skin defect model, the injectable HAKGM hydrogel composite demonstrated significant efficacy in reducing burn wound recovery time. These findings highlight the potential utility of the novel HAKGM hydrogel composite as an advanced solution for burn wound dressings, offering enhanced healing properties and facilitating improved patient outcomes.</p><h3 data-test=\"abstract-sub-heading\">Graphical abstract</h3>\u0000","PeriodicalId":16306,"journal":{"name":"Journal of Materials Research","volume":"23 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141569983","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}
引用次数: 0
Efficient hydrogen production via hydrolysis of NaBH4 by the Co/Co3O4–Cu2O–ZnO catalyst prepared using mixed metal oxides as support material 以混合金属氧化物为支撑材料制备的 Co/Co3O4-Cu2O-ZnO 催化剂通过水解 NaBH4 高效制氢
IF 2.7 4区 材料科学
Journal of Materials Research Pub Date : 2024-07-09 DOI: 10.1557/s43578-024-01387-5
Neslihan Erat Toprak, Abdulkadir Özer, Gamze Bozkurt
{"title":"Efficient hydrogen production via hydrolysis of NaBH4 by the Co/Co3O4–Cu2O–ZnO catalyst prepared using mixed metal oxides as support material","authors":"Neslihan Erat Toprak, Abdulkadir Özer, Gamze Bozkurt","doi":"10.1557/s43578-024-01387-5","DOIUrl":"https://doi.org/10.1557/s43578-024-01387-5","url":null,"abstract":"<p>In this study, we investigate for the first time the catalytic activity of the Co/Co<sub>3</sub>O<sub>4</sub>–Cu<sub>2</sub>O–ZnO catalyst in hydrogen production from the hydrolysis of NaBH<sub>4</sub>. After the Co<sub>3</sub>O<sub>4</sub>–CuO–ZnO support material was synthesized by the chemical precipitation method, the impregnation method was used to dope Co on the support material. Morphological and structural analyses of the Co/Co<sub>3</sub>O<sub>4</sub>–Cu<sub>2</sub>O–ZnO catalyst were investigated by XRD, XPS, SEM, TEM, and BET methods. Then, activity tests of the catalyst were performed in an H<sub>2</sub> generation system. The hydrogen generation rate (HGR) of the Co/Co<sub>3</sub>O<sub>4</sub>–Cu<sub>2</sub>O–ZnO catalyst was found 4698 ml min<sup>−1</sup> gcat<sup>−1</sup> at 25°C. After the HGR measurements at 25, 35, 45, and 55°C the activation energy of the Co/Co<sub>3</sub>O<sub>4</sub>–Cu<sub>2</sub>O–ZnO catalyst was calculated as 28.05 kJ mol<sup>−1</sup>. In addition, the HGR value had reached a high value such as 12,920 ml min<sup>−1</sup> gcat<sup>−1</sup> at 55°C.</p><h3 data-test=\"abstract-sub-heading\">Graphical abstract</h3>\u0000","PeriodicalId":16306,"journal":{"name":"Journal of Materials Research","volume":"25 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141569987","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}
引用次数: 0
Superior tensile properties of FDM 3D-printed TPU/E-TPU layered structure FDM 3D 打印热塑性聚氨酯/E-热塑性聚氨酯分层结构的卓越拉伸性能
IF 2.7 4区 材料科学
Journal of Materials Research Pub Date : 2024-07-03 DOI: 10.1557/s43578-024-01365-x
Muhammad Imran Farid, Wenzheng Wu, Guiwei Li, Aodu Zheng, Yu Zhao
{"title":"Superior tensile properties of FDM 3D-printed TPU/E-TPU layered structure","authors":"Muhammad Imran Farid, Wenzheng Wu, Guiwei Li, Aodu Zheng, Yu Zhao","doi":"10.1557/s43578-024-01365-x","DOIUrl":"https://doi.org/10.1557/s43578-024-01365-x","url":null,"abstract":"<p>The study examines 3D printing technology for robust and flexible prototypes, concentrating on FDM to improve the tensile properties of multilayer TPU and conductive TPU. This research aims at the mechanical properties of layered materials to evaluate how effectively rapid prototyping approaches adhere to robust and soft components. The research evaluated five TPU/E-TPU filaments that additively produced multilayer assemblies: Models (TET), (ETE), (TETE/ETET), (pure TPU), and (pure E-TPU). Models of pure TPU and pure E-TPU serve as standards for comparison. We tailored three input parameters at three levels each: layer thickness, printing speed, and extruder temperature. The experimental results of TET (emphasizing flexibility) and ETE (prioritizing electric conductivity)-layered model arrangements lead to the best mechanical properties. The ANOVA results for the tensile strength extension response models; <i>R</i><sup>2</sup> = 75.7%; adjusted <i>R</i><sup>2</sup> = 69.3%; and the tensile strain at yield is <i>R</i><sup>2</sup> = 71.4%; adjusted <i>R</i><sup>2</sup> = 65.7%.</p><h3 data-test=\"abstract-sub-heading\">Graphical abstract</h3>","PeriodicalId":16306,"journal":{"name":"Journal of Materials Research","volume":"1 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141552517","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}
引用次数: 0
Understanding the mechanical properties of two-phase nanocrystalline AlCrFeMoNbNi high-entropy alloy evaluated by nanoindentation 通过纳米压痕评估了解两相纳米晶铝铬铁钼铌镍高熵合金的力学性能
IF 2.7 4区 材料科学
Journal of Materials Research Pub Date : 2024-07-02 DOI: 10.1557/s43578-024-01382-w
V. Madhu Babu, Deekshith G. Kalali, Harita Seekala, P. Sudharshan Phani, K. Bhanu Sankara Rao, Koteswararao V. Rajulapati
{"title":"Understanding the mechanical properties of two-phase nanocrystalline AlCrFeMoNbNi high-entropy alloy evaluated by nanoindentation","authors":"V. Madhu Babu, Deekshith G. Kalali, Harita Seekala, P. Sudharshan Phani, K. Bhanu Sankara Rao, Koteswararao V. Rajulapati","doi":"10.1557/s43578-024-01382-w","DOIUrl":"https://doi.org/10.1557/s43578-024-01382-w","url":null,"abstract":"<p>Nanocrystalline two-phase AlCrFeMoNbNi high-entropy alloy (HEA) was produced using mechanical alloying (MA) and high-pressure torsion (HPT), with an average grain size of 10 ± 2 nm. Nanoindentation testing was performed to measure the hardness from which the strengthening contributions via various mechanisms such as strain hardening, solid solution strengthening, frictional stress and grain boundary strengthening are assessed. A Hall–Petch coefficient of 0.135 MPa <span>(sqrt{text{m}})</span> is estimated from this analysis, which is much lower than that for comparable alloys. A very low activation volume, for plastic deformation, of 3.4 b<sup>3</sup> was measured from strain rate dependent nanoindentation testing, which is indicative of grain boundary mediated plastic deformation. Furthermore, the estimated activation energy of 171 kJ/mol measured from nanoindentation testing, is comparable to that for grain boundary diffusion in Cantor alloy. These experimental results provide insights on the deformation response of nanocrystalline two-phase AlCrFeMoNbNi HEA at an extremely fine grain size of around 10 nm.</p><h3 data-test=\"abstract-sub-heading\">Graphical abstract</h3>\u0000","PeriodicalId":16306,"journal":{"name":"Journal of Materials Research","volume":"61 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141512259","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}
引用次数: 0
Effect of boron microalloying on the microstructure, mechanical, and corrosion properties of as-cast biomedical Co–Cr–W–Ni-based alloys 硼微合金化对铸造生物医学 Co-Cr-W-Ni 基合金微观结构、机械性能和腐蚀性能的影响
IF 2.7 4区 材料科学
Journal of Materials Research Pub Date : 2024-07-02 DOI: 10.1557/s43578-024-01384-8
Muhammad Ilham Maulana, Adi Noer Syahid, Bunga Rani Elvira, Aprilia Erryani, Yudi Nugraha Thaha, Fendy Rokhmanto, Manami Mori, Kenta Yamanaka, Akhmad Ardian Korda, Ika Kartika, Albertus Deny Heri Setyawan
{"title":"Effect of boron microalloying on the microstructure, mechanical, and corrosion properties of as-cast biomedical Co–Cr–W–Ni-based alloys","authors":"Muhammad Ilham Maulana, Adi Noer Syahid, Bunga Rani Elvira, Aprilia Erryani, Yudi Nugraha Thaha, Fendy Rokhmanto, Manami Mori, Kenta Yamanaka, Akhmad Ardian Korda, Ika Kartika, Albertus Deny Heri Setyawan","doi":"10.1557/s43578-024-01384-8","DOIUrl":"https://doi.org/10.1557/s43578-024-01384-8","url":null,"abstract":"<p>Co–Cr–W–Ni–Mn–B alloys, potentially applicable for implant materials, with boron contents of 0, 0.01, and 0.05 wt% were prepared by arc melting in an argon atmosphere. The influence of B content on the as-cast microstructure, mechanical, and corrosion properties was investigated. The as-cast state revealed dendritic structure, with the length of dendritic arm-spacing decreasing with increasing boron contents. The addition of boron led to the emergence of M<sub>5</sub>B<sub>3</sub>-type precipitates at the interdendritic boundaries within the matrix, which consisted of the γ and ε phases. The alloy with 0.01 wt% B exhibited increased ultimate-tensile-strength and plastic elongation of 17% and 36% higher than those of the boron-free alloy, respectively. The corrosion rate of the Co–Cr–W–Ni–Mn alloy in Hanks’ solution has dropped drastically by 850% with a minor B addition of 0.05 wt%. The improved mechanical and corrosion properties were attributed to the refined dendritic structure and formation of boride (M<sub>5</sub>B<sub>3</sub>-type) precipitates.</p><h3 data-test=\"abstract-sub-heading\">Graphical abstract</h3>\u0000","PeriodicalId":16306,"journal":{"name":"Journal of Materials Research","volume":"94 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141512260","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}
引用次数: 0
Revisiting the structures and energies of β-SiC $$leftlangle {001} rightrangle$$ symmetric tilt grain boundaries 重新审视 β-SiC $$leftlangle {001} rightrangle$$ 对称倾斜晶界的结构和能量
IF 2.7 4区 材料科学
Journal of Materials Research Pub Date : 2024-07-02 DOI: 10.1557/s43578-024-01375-9
Liang Wang, Lei Zhang, Wenshan Yu
{"title":"Revisiting the structures and energies of β-SiC $$leftlangle {001} rightrangle$$ symmetric tilt grain boundaries","authors":"Liang Wang, Lei Zhang, Wenshan Yu","doi":"10.1557/s43578-024-01375-9","DOIUrl":"https://doi.org/10.1557/s43578-024-01375-9","url":null,"abstract":"<p>Structures and energetics of grain boundaries (GBs) can significantly modulate various properties of polycrystals. Previous studies focus on the ground-state GB structures of <i>β</i>-SiC while the metastable states are poorly understood. Herein, atomistic simulations are employed to generate metastable structures for a series of <span>(leftlangle {001} rightrangle)</span> symmetric tilt GBs in <i>β</i>-SiC. Structural units (SUs) based on the edge dislocation core structures are defined to characterize the GB structures. All GB structures can be divided into four types according to their different constituent SUs. Various distributions, orderings and combinations of SUs can generate multiple metastable structures with different GB energies. Furthermore, our calculations of low-angle GB energies agree well with the theoretical predictions based on the continuum elasticity theory. Our findings not only enhance the fundamental understanding of the (meta)stable grain boundary energetics and structural characteristics but also have significant implications for micro-structure design and grain boundary engineering in polycrystalline SiC.</p><h3 data-test=\"abstract-sub-heading\">Graphical abstract</h3>\u0000","PeriodicalId":16306,"journal":{"name":"Journal of Materials Research","volume":"14 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141512258","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}
引用次数: 0
A comparative investigation on the development of porous-structured Akermanite (Ca2MgSi2O7) via ball milling, sol–gel, and combination (hybrid) process for orthopedic applications 通过球磨、溶胶-凝胶和组合(混合)工艺开发骨科用多孔结构赤铁矿(Ca2MgSi2O7)的比较研究
IF 2.7 4区 材料科学
Journal of Materials Research Pub Date : 2024-07-02 DOI: 10.1557/s43578-024-01378-6
M. Girija, T. Sampath Kumar
{"title":"A comparative investigation on the development of porous-structured Akermanite (Ca2MgSi2O7) via ball milling, sol–gel, and combination (hybrid) process for orthopedic applications","authors":"M. Girija, T. Sampath Kumar","doi":"10.1557/s43578-024-01378-6","DOIUrl":"https://doi.org/10.1557/s43578-024-01378-6","url":null,"abstract":"<p>Biomedical material advancements have resulted in an increasing demand for innovative and high-performance Akermanite (AKT-Ca<sub>2</sub>MgSi<sub>2</sub>O<sub>7</sub>) ceramics developed for a diverse range of uses. This study conducts a comparative analysis and development of porous AKT structures, employing three distinct synthesis methods: ball milling, sol–gel, and a combining both processes. The objective is to evaluate the microstructural properties, porosity levels, mechanical strength, and bioactivity of the AKT. XRD study confirms the phase purity at 1300 °C, and FT-IR identified the respective functional groups present in the material composition. SEM analysis revealed the porous structure (~ 3–6 μm) of AKT samples, which had a uniform distribution. The results suggest that the combination process enhances the structural and functional properties of Akermanite. Biomineralization study reveals that hydroxyapatite formation was attained after 21 days. The achieved compressive strength is 193 ± 5 MPa. The outcome of the antibacterial activity against <i>S. aureus</i> and <i>E. coli</i> test strains suggests that viable material for orthopedic applications.</p><h3 data-test=\"abstract-sub-heading\">Graphical abstract</h3>\u0000","PeriodicalId":16306,"journal":{"name":"Journal of Materials Research","volume":"28 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141512261","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}
引用次数: 0
Lamellar structures in directionally solidified naphthalene suspensions 定向固化萘悬浮液中的层状结构
IF 2.7 4区 材料科学
Journal of Materials Research Pub Date : 2024-06-26 DOI: 10.1557/s43578-024-01381-x
Kristen L. Scotti, Peter W. Voorhees, David C. Dunand
{"title":"Lamellar structures in directionally solidified naphthalene suspensions","authors":"Kristen L. Scotti, Peter W. Voorhees, David C. Dunand","doi":"10.1557/s43578-024-01381-x","DOIUrl":"https://doi.org/10.1557/s43578-024-01381-x","url":null,"abstract":"<p>To investigate naphthalene as a suspending fluid for freeze-casting applications, sterically stabilized suspensions of copper microparticles suspended in liquid naphthalene are directionally solidified in a Bridgman furnace. Colonies of nearly particle-free naphthalene lamellae, interspersed with particle-enriched interlamellar regions, are predominantly aligned in the direction of the imposed thermal gradient. As furnace translation velocities decrease from 80 to 6.5 μm s<sup>−1</sup>, the thickness of naphthalene lamellae increases. For the lowest velocity, a transition to a lensing microstructure (with naphthalene bands aligned perpendicular to the solidification direction) is observed in central regions of samples. For all velocities, the naphthalene lamellae show (i) secondary dendritic arms on one of their sides and (ii) are thinnest within core regions relative to peripheral regions (closest to the crucible walls). Together, these observations suggest the presence of buoyancy-driven convection during solidification.</p><h3 data-test=\"abstract-sub-heading\">Graphical Abstract</h3>\u0000","PeriodicalId":16306,"journal":{"name":"Journal of Materials Research","volume":"86 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141507185","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}
引用次数: 0
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