Materials Advances最新文献

{"title":"Role of intermolecular charge transfer towards fluorometric detection of fluoride ions with anthrapyrazolone derivatives†","authors":"Gomathi Sivakumar, Anashwara Babu, Anubhab Das, Mageshwari Anandhan, Venkatramaiah Nutalapati and Samarendra Maji","doi":"10.1039/D4MA00738G","DOIUrl":"https://doi.org/10.1039/D4MA00738G","url":null,"abstract":"<p >Anion detection using small molecules as chemosensors holds significant importance in the biological and environmental fields, offering several advantages over conventional methods. In this report, we have developed three anthrapyrazolone derivatives, namely 2,7-dihydrobenzo[1,2,3-<em>cd</em>:4,5,6-<em>c</em>′<em>d</em>′]bis(indazole) (<strong>DHBBI</strong>), 2-(benzo[1,2,3-<em>cd</em>:4,5,6-<em>c</em>′]bis(indazole)-2(7<em>H</em>)-yl)ethanol (<strong>DHBBI-OH</strong>), and 2,2′-(benzo[1,2,3-<em>cd</em>:4,5,6-<em>c</em>′<em>d</em>′]bis(indazole)-2,7-diyl)diethanol (<strong>DHBBI-2-OH</strong>), utilizing straightforward chemical reactions. These compounds were investigated for the fluorometric detection of a series of anions <em>viz.</em> F<small>⁻</small>, Cl<small>⁻</small>, Br<small>⁻</small>, I<small>⁻</small>, OH<small>⁻</small>, CN<small>⁻</small>, ClO<small>₄</small><small>⁻</small>, SO<small>₄</small><small>²⁻</small>, NO<small>₃</small><small>⁻</small> and SCN<small>⁻</small> in the form of tetrabutylammonium salts. Detailed photophysical and mechanistic investigations were conducted to understand the interactions of three fluorophores with different anions. Fluorescence analysis showed considerable changes in the emission intensity of the three fluorophores in the presence of a series of anions as mentioned earlier. Among the synthesized molecules, <strong>DHBBI</strong> (<em>K</em><small>_sv</small> = 11.6 × 10<small>⁴</small> M<small>⁻¹</small>) exhibited the highest selectivity with ∼1.30 and 1.80 fold higher association rate constants and sensitivity with a limit of detection of ∼10.3 mM towards F<small>⁻</small> ions compared to <strong>DHBBI-OH</strong> and <strong>DHBBI-2-OH</strong>. The selectivity and sensitivity towards F<small>⁻</small> ions were demonstrated in light of hydrogen-bonding interactions between <strong>DHBBI</strong> and F<small>⁻</small> ions. Additionally, DFT and TDDFT studies were employed for <strong>DHBBI</strong> and its derivatives to investigate their structural insights and electronic properties comprehensively.</p>","PeriodicalId":18242,"journal":{"name":"Materials Advances","volume":null,"pages":null},"PeriodicalIF":5.2,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ma/d4ma00738g?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142598739","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A cost-effective strategy to design and fabricate absorption dominant flexible multilayer laminates by rationally tailoring their layers†","authors":"Vaishnavi Khade, Avanish Babu Thirumalasetty, Yogesh Kumar Choukiker and Madhuri Wuppulluri","doi":"10.1039/D4MA00741G","DOIUrl":"https://doi.org/10.1039/D4MA00741G","url":null,"abstract":"<p >Owing to the ever-increasing complexity of the electromagnetic environment, the market for electromagnetic interference (EMI) shielding is expanding at a rapid rate. Recently, there has been a focus on developing new methods that can be used to fine-tune and forecast the shielding qualities of buildings without using up all of the raw materials. Additionally, methods that are economical and need a short duration of time for optimization have been prioritized. The purpose of this article is to demonstrate an efficient and accurate method for predicting the EMI shielding effectiveness (EMI SE) of materials. This is accomplished by simulating the performance of composites that contain alternate layers of conducting and magnetic materials within a virtual waveguide measurement environment. Using CST Studio Suite software, the EMI shielding effectiveness of multilayered structures is simulated in the X-band range. The strategic arrangement of electromagnetic (EM) energy-trapping layers within impedance-matching layers in the multilayered structures is found to significantly contribute to the enhancement of absorption-dominated EMI shielding, as demonstrated through a simulation carried out by varying the order and number of the conducting and magnetic layers. Among the multilayered structures, the PC/PM/PC (PVDF-CNF/PVDF-MWCNTs/PVDF-CNF) systems showed the best shielding efficiency, with a value of 96.47 dB. Poly(vinylidene fluoride)-based composites comprising low-cost MWCNTs are used to construct the multilayered structures for testing purposes. After completing this research, we came up with the hypothesis that it is not required to use materials that have a high manufacturing cost and need laborious fabrication processes in order to create extremely effective shielding materials.</p>","PeriodicalId":18242,"journal":{"name":"Materials Advances","volume":null,"pages":null},"PeriodicalIF":5.2,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ma/d4ma00741g?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142598675","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Exploring the potential of waste biomass of olive as an additive for layered double hydroxide/polyurethane as an effective and safe agent for the adsorption of drug residues: a bioremediation approach†","authors":"Rania Abdelazeem, W. Kamal, Zienab E. Eldin, Mahmoud Abdelrazek Roshdy, Ahmed A. Allam, Sara Saeed, Doaa Abdel Tawab, Sarah I. Othman, Abeer Enaiet Allah, Abdelatty M. Radalla and Rehab Mahmoud","doi":"10.1039/D4MA00910J","DOIUrl":"https://doi.org/10.1039/D4MA00910J","url":null,"abstract":"&lt;p &gt;The increasing use of antibiotics worldwide and their presence in wastewater pose a risk to human health and the environment, even in minute amounts, making them potentially new and dangerous pollutants of the ecosystem. Drug resistance and changes in the biological cycle are two of the negative consequences of chemical pollution. The development of affordable, practical, and recyclable adsorbents is imperative because of the significant threat that the rise in antibiotic residues poses to aquatic and ecological settings. The accumulation of pharmaceutical compounds in aqueous solutions has been lessened by a number of strategies, including adsorption onto the surface of agricultural wastes. Bioactive substances such as vitamins, carotenoids, and polyphenols are abundant in pomace, including minerals, proteins, cellulose, lignin, and pectin. All of these substances exhibit sorption characteristics with respect to pharmaceutical compounds in addition to their many other positive health effects. X-Ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), Brunauer–Emmett–Teller (BET) analysis and particle size analysis were used to thoroughly examine olive pomace (O-Pom), layered double hydroxide (LDH), polyurethane (PU) and LDH/PU/O-Pom composites. FTIR spectroscopy of O-Pom and LDH/PU/O-Pom before and after the adsorption of cefotaxime was performed and the results were discussed. Next, the effects of several parameters, including pH, adsorbent amount, concentration, and contact time, on wastewater treatment efficiency were investigated. We studied nonlinear adsorption isotherm models at pH 5 using O-Pom and O-Pom-LDH/PU, which showed maximum adsorption capacities (&lt;em&gt;q&lt;/em&gt;&lt;small&gt;&lt;sub&gt;max&lt;/sub&gt;&lt;/small&gt;) of 163.23 mg g&lt;small&gt;&lt;sup&gt;−1&lt;/sup&gt;&lt;/small&gt; for O-Pom and 250 mg g&lt;small&gt;&lt;sup&gt;−1&lt;/sup&gt;&lt;/small&gt; for LDH/PU/O-Pom. By identifying the most suitable isotherm, error functions are used to assess the validity of the adsorption mathematical models against experimental data, as precise adsorption equilibrium information is essential for adsorption analysis and design. Additionally, we compared the investigated models with the corrected Akaike information criterion (AIC) to confirm that more fitting models were used in the isotherm study. The model that best fitted according to the AIC calculated for O-Pom was the Freundlich model, and the AIC values were 69.23 and 63.91 for O-Pom and LDH/PU/O-Pom, respectively. In addition, ethanol was used as a regeneration agent for the tested adsorbent loaded with cefotaxime. It retained a high removal percentage up to the fourth cycle. Additionally, kinetic experiments were carried out. The MTT assay results of normal Vero cells indicate that at the highest concentration of 1000 μg mL&lt;small&gt;&lt;sup&gt;−1&lt;/sup&gt;&lt;/small&gt;, LDH/PU, O-Pom, and LDH/PU/O-Pom resulted in cell viabilities of 66.7 ± 1.1%, 61 ± 1%, and 61.8 ± 1.3%, respectively, suggesting their low cytotoxicity and","PeriodicalId":18242,"journal":{"name":"Materials Advances","volume":null,"pages":null},"PeriodicalIF":5.2,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ma/d4ma00910j?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142598775","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Perylene diimide functionalized nano-silica: green emissive material for selective probing and remediation of 4-nitrocatechol, Ru3+, and Cu2+ with biosensing applications†","authors":"Sanjay Yadav, Nishu Choudhary, Avinash T. Vasave, Vasavdutta Sonpal and Alok Ranjan Paital","doi":"10.1039/D4MA00862F","DOIUrl":"https://doi.org/10.1039/D4MA00862F","url":null,"abstract":"<p >Hybrid materials having dual applications in environmental monitoring and remediation are vital for mitigating pollution and economic benefits. In this regard, mesoporous silica is extensively studied compared to nano-silica materials due to challenges in controlling particle size morphology, and aggregation. In this work, a hybrid material was developed using nano-silica as a substrate and perylene diimide derivative as a fluorophore for simultaneous detection and adsorption of specific toxic analytes. A microemulsion method was applied for the synthesis of nano-silica with spherical to discoid morphology providing a high surface area. The surface immobilization of perylene diimide and subsequent bay-functionalization yielded the green emissive material nano-SiO<small>₂</small>@BAPERTOL. This material selectively detects 4-nitrocatechol (4-NC) <em>via</em> dynamic fluorescence quenching (FRET), and Ru<small>³⁺</small> and Cu<small>²⁺</small> among metal cations through static fluorescence quenching, with LODs of 4.34 nM, 0.56 nM, and 0.43 nM, respectively. This material exhibits hydrogen bonding-mediated high adsorption capacity (∼775 mg g<small>⁻¹</small>) towards 4-NC and coordination-driven adsorption of Ru<small>³⁺</small> and Cu<small>²⁺</small> ions (460, 566 mg g<small>⁻¹</small>). Also, the biosensing potential of the material was evaluated using brine shrimp (<em>Artemia nauplii</em>). Conclusively, the material serves as a single recyclable platform for selective detection and remediation of 4-NC, Ru<small>³⁺</small>, and Cu<small>²⁺</small> ions, demonstrating superior performance and sustainability.</p>","PeriodicalId":18242,"journal":{"name":"Materials Advances","volume":null,"pages":null},"PeriodicalIF":5.2,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ma/d4ma00862f?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142598741","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of redox engineering on the trade-off relationship between thermopower and electrical conductivity in lanthanum titanium based transition metal oxides†","authors":"Mohammad El Loubani, Gene Yang, Seyed Morteza Taghavi Kouzehkanan, Tae-Sik Oh, Santosh Kiran Balijepalli and Dongkyu Lee","doi":"10.1039/D4MA00829D","DOIUrl":"https://doi.org/10.1039/D4MA00829D","url":null,"abstract":"<p >Discovery of new materials plays a critical role in developing advanced high-temperature thermoelectric (TE) applications. Transition metal oxides (TMOs) are one of the attractive candidates for high-temperature TE applications due to their thermal and chemical stability. However, the trade-off relationship between thermopower (<em>S</em>) and electrical conductivity (<em>σ</em>) limits the maximum attainable power factor (PF), thereby hindering improvements in TE conversion efficiency. To overcome this trade-off relationship, the emerging approach of the redox-driven metal exsolution in TMOs shows promise in improving both <em>S</em> and <em>σ</em>. However, the effect of metal exsolution with different particle sizes and densities on <em>S</em> and <em>σ</em> is still largely unexplored. This study demonstrates an unusually large enhancement in PF through the exsolution of Ni nanoparticles in epitaxial La<small>_0.7</small>Ca<small>_0.2</small>Ni<small>_0.25</small>Ti<small>_0.75</small>O<small>₃</small> (LCNTO) thin films. Metal exsolution leads to a decrease in the carrier concentration while increasing the carrier mobility due to energy filtering effects. In addition, the exsolved metal particles introduce high-mobility electron carriers into the low-mobility LCNTO matrix. Consequently, the exsolution of metal particles results in a significant enhancement in <em>S</em> along with a substantial increase in <em>σ</em>, compared to the pristine film. Overall, the TE power factor of LCNTO is dramatically enhanced by up to 8 orders of magnitude owing to the presence of exsolved metal particles. This enhancement is attributed to the selective filtering of carriers caused by energy band bending at the metal–oxide interfaces and the high-mobility carriers from the exsolved Ni particles with a high Ni<small>⁰</small> fraction. This study unequivocally demonstrates the impact of metal exsolution on oxide TE properties and provides a novel route to tailor the interconnected physical and chemical properties of oxides, leading to enhanced TE power output.</p>","PeriodicalId":18242,"journal":{"name":"Materials Advances","volume":null,"pages":null},"PeriodicalIF":5.2,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ma/d4ma00829d?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142598765","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Retraction: Eco-friendly repurposing of by-pass waste for optics and radiation protection: addressing hazardous material challenges","authors":"Hesham M. H. Zakaly, H. Hashim, Shams A. M. Issa, Moustafa A. Darwish, Fatma M. Obiedallah, M. S. I. Koubisy and H. A. Saudi","doi":"10.1039/D4MA90118E","DOIUrl":"https://doi.org/10.1039/D4MA90118E","url":null,"abstract":"<p >Retraction of ‘Eco-friendly repurposing of by-pass waste for optics and radiation protection: addressing hazardous material challenges’ by Hesham M. H. Zakaly <em>et al.</em>, <em>Mater. Adv.</em>, 2024, https://doi.org/10.1039/d3ma01062g.</p>","PeriodicalId":18242,"journal":{"name":"Materials Advances","volume":null,"pages":null},"PeriodicalIF":5.2,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ma/d4ma90118e?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142598777","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Eco-friendly repurposing of by-pass waste for optics and radiation protection: addressing hazardous material challenges","authors":"Hesham M. H. Zakaly, H. Hashim, Shams A. M. Issa, Moustafa A. Darwish, Fatma M. Obiedallah, M. S. I. Koubisy and H. A. Saudi","doi":"10.1039/D4MA00519H","DOIUrl":"https://doi.org/10.1039/D4MA00519H","url":null,"abstract":"<p >This study delves into the investigation of the optical and gamma radiation shielding properties of glasses formulated with varying concentrations of by-pass (cement dust) combined with Na<small>₂</small>O, Fe<small>₂</small>O<small>₃</small>, Bi<small>₂</small>O<small>₃</small>, and P<small>₂</small>O<small>₅</small>. The specific compositions are represented as ((<em>x</em>) by-pass–(20) Na<small>₂</small>O–(10) Fe<small>₂</small>O<small>₃</small>–(20) Bi<small>₂</small>O<small>₃</small>–(50 − <em>x</em>) P<small>₂</small>O<small>₅</small>), with “<em>x</em>” ranging from 0 to 15 wt%. The structural and optical properties of these glasses were analyzed using X-ray diffraction (XRD), Fourier-transform infrared (FTIR) spectroscopy, and UV-visible-NIR spectroscopy techniques. The XRD results reveal the absence of Bragg peaks and highlight the amorphous nature of the prepared samples. Notably, increasing by-pass concentration enhanced UV-visible-NIR transmittance, particularly from 400 nm to 850 nm. Radiation shielding assessments were conducted across photon energies ranging from 80 to 2614 keV. The results highlighted that the linear and mass attenuation coefficients were inversely proportional to the photon energy. The by-pass15 glass, with the highest by-pass concentration, consistently demonstrated superior shielding attributes compared to its counterparts, with the lowest half-value layer (<em>G</em><small>_HVL</small>) values and the most substantial radiation protection efficiency (RPE). Comparative assessments with other glasses and concrete types further accentuated the potential of the by-pass15 glass as a promising candidate for gamma radiation shielding applications. The results obtained in this research pave the way for potentially utilizing by-pass15 glass in environments where radiation protection is imperative. Incorporating by-pass in glass composites enhances their gamma shielding efficiency and promotes the sustainable use of by-pass, underscoring the dual advantages of this innovative approach.</p>","PeriodicalId":18242,"journal":{"name":"Materials Advances","volume":null,"pages":null},"PeriodicalIF":5.2,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ma/d4ma00519h?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142598674","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Correction: Li2MnCl4 single crystal: a new candidate for a red-emitting neutron scintillator","authors":"Vojtěch Vaněček, Robert Král, Křehlíková Kateřina, Romana Kučerková, Vladimir Babin, Petra Zemenová, Jan Rohlíček, Zuzana Málková, Terézia Jurkovičová and Martin Nikl","doi":"10.1039/D4MA90125H","DOIUrl":"https://doi.org/10.1039/D4MA90125H","url":null,"abstract":"<p >Correction for ‘Li<small>₂</small>MnCl<small>₄</small> single crystal: a new candidate for a red-emitting neutron scintillator’ by Vojtěch Vaněček <em>et al.</em>, <em>Mater. Adv.</em>, 2024, https://doi.org/10.1039/d4ma00697f.</p>","PeriodicalId":18242,"journal":{"name":"Materials Advances","volume":null,"pages":null},"PeriodicalIF":5.2,"publicationDate":"2024-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ma/d4ma90125h?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142524282","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ferroelectric-enabled significant carbon dioxide molecular adsorption on BaTiO3(001)†","authors":"Alexandru-Cristi Iancu, George A. Lungu, Cristian A. Tache and Cristian M. Teodorescu","doi":"10.1039/D4MA00856A","DOIUrl":"https://doi.org/10.1039/D4MA00856A","url":null,"abstract":"<p >Carbon dioxide (CO<small>₂</small>) is reversibly adsorbed and desorbed from ferroelectric (001) oriented, BaO-terminated barium titanate, as revealed in real time by high resolution and ultrafast photoelectron spectroscopy and certified by low energy electron diffraction. Desorption proceeds when the substrate is heated above its Curie temperature. The amount of CO<small>₂</small> adsorbed is derived to be between one molecule for a surface BaO unit cell (adsorption below room temperature) and one molecule for two unit cells (adsorption above room temperature). The molecule is bound with its carbon to surface oxygen, forming a CO<small>₃</small> structure. The BaTiO<small>₃</small>(001) surface is unaffected by repeated cycles of adsorption–desorption. The relatively high amount of CO<small>₂</small> adsorbed and the stability of the substrate after repeated adsorption and desorption processes promotes barium titanate as a promising candidate for decarbonization technologies.</p>","PeriodicalId":18242,"journal":{"name":"Materials Advances","volume":null,"pages":null},"PeriodicalIF":5.2,"publicationDate":"2024-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ma/d4ma00856a?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142598719","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Variations in γ′ formers and refractory elements for enhanced creep resistance and phase stability of an advanced Ni-based superalloy†‡","authors":"Rui Feng, Chang-Yu Hung, Stoichko Antonov, Jonathan D. Poplawsky, Ke An, Paul D. Jablonski and Martin Detrois","doi":"10.1039/D4MA00334A","DOIUrl":"https://doi.org/10.1039/D4MA00334A","url":null,"abstract":"<p >The strong demands on increasing fuel efficiency have continuously driven the optimization of superalloys for high-performance applications. In this study, modifications to the chemistry and heat treatment of HAYNES® 282® alloy (H282) were performed by varying γ′ formers and refractory elements. It was found that increasing Ti and substituting W for some of the Mo in the newly designed alloy (Q) resulted in a significant improvement of creep resistance, up to 130% increase in creep life, compared to standard H282. It was found that Orowan loops and dislocation climb were the dominant creep deformation mechanisms in alloy Q, while extensive dislocation tangling as an additional configuration was observed in the baseline alloy. Moreover, phase stability investigations for up to 5000 h at 800 °C and 900 °C revealed a reduced formation of detrimental σ and μ phases in alloy Q when compared to H282. Atom-probe tomography (APT) revealed that the formation and growth of those phases were responsible for a decrease in Mo content in the matrix, thereby leading to a decrease in solid-solution strengthening in H282 over time. Furthermore, the coarsening of γ′ precipitates was retarded by the substitution of W for Mo, particularly under creep stress. The theoretical and experimental understanding of precipitation strengthening unraveled that higher optimal strengthening occurs at larger particle size for alloy Q, compared to the commercial formulation, further explaining the origin of enhanced creep resistance in the modified alloy.</p>","PeriodicalId":18242,"journal":{"name":"Materials Advances","volume":null,"pages":null},"PeriodicalIF":5.2,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ma/d4ma00334a?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142598673","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}