Materialia最新文献_第4页

Influence of oxygen vacancies on dielectric properties and phase transition of rutile-type (TiVCrNbTa)O2

IF 3

Materialia Pub Date : 2025-02-21 DOI: 10.1016/j.mtla.2025.102380

Jian Guo , Siwen Yu , Chengyi Chu , Jianguo Pan , Peiling Ke , Gongjun Zhang , Aihua Sun

{"title":"Influence of oxygen vacancies on dielectric properties and phase transition of rutile-type (TiVCrNbTa)O2","authors":"Jian Guo , Siwen Yu , Chengyi Chu , Jianguo Pan , Peiling Ke , Gongjun Zhang , Aihua Sun","doi":"10.1016/j.mtla.2025.102380","DOIUrl":"10.1016/j.mtla.2025.102380","url":null,"abstract":"<div><div>High-entropy ceramics (HECs) are a novel category of multicomponent ceramics featuring significant atomic-scale disorder. This unique structure preserves the intrinsic properties of individual elements while enabling their interactions to generate intriguing phenomena. In this study, single-phase and dual-phase (TiVCrNbTa)O<sub>2</sub> high-entropy oxide ceramics (HEOs) were fabricated via a straightforward sintering process. The synthesis of single-phase HEOs with a pure rutile structure was achieved at 1400 °C by altering the sintering atmosphere from air to argon. The single-phase (TiVCrNbTa)O<sub>2</sub> HEOs exhibited remarkable dielectric properties, with dielectric constants (∼5) and dielectric loss attain the order of 10<sup>–3</sup> in the frequency range of 2–4 GHz. The dual-phase (TiVCrNbTa)O<sub>2</sub> HEOs also have approximate dielectric properties and exhibit excellent thermal stability from room temperature to 1200 °C under the air atmosphere. A new single-phase and dual-phase HEOs was successfully synthesized, and their dielectric properties as well as thermal stability meet the requirements of wave-transparent materials.</div></div>","PeriodicalId":47623,"journal":{"name":"Materialia","volume":"39 ","pages":"Article 102380"},"PeriodicalIF":3.0,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143479868","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High-throughput characterisation of the long-term ageing of an A357+1wt%Cu cast aluminium alloy using temperature gradient

IF 3

Materialia Pub Date : 2025-02-15 DOI: 10.1016/j.mtla.2025.102378

Thomas Perrin , Arthur Després , Pierre Heugue , Alexis Deschamps , Frédéric De Geuser

{"title":"High-throughput characterisation of the long-term ageing of an A357+1wt%Cu cast aluminium alloy using temperature gradient","authors":"Thomas Perrin , Arthur Després , Pierre Heugue , Alexis Deschamps , Frédéric De Geuser","doi":"10.1016/j.mtla.2025.102378","DOIUrl":"10.1016/j.mtla.2025.102378","url":null,"abstract":"<div><div>A357 alloy is a widely studied cast aluminium alloy used in applications such as cylinder heads or aerospace applications. The addition of 1wt% copper to this alloy modifies the nanometric precipitation sequence and improves heat resistance. Thermal ageing resistance is a critical property for such applications and the ability to predict the end of life of these products is crucial. In this study, we investigate the effect of long-term ageing on an A357+1wt%Cu alloy. We have developed a combinatorial approach to gather sufficient data to model the evolution of mechanical properties during extended ageing. Samples have been aged in a temperature gradient for durations up to 10,000 h and then characterised using space-resolved Small- and Wide-Angle X-ray Scattering (SAXS & WAXS), as well as hardness mapping. Complementary Transmission Electron Microscopy (TEM) observations were also performed. Finally, a simple approach based on time-temperature equivalence is implemented to predict the evolution of the mechanical properties and the nanometric precipitation during long-term ageing.</div></div>","PeriodicalId":47623,"journal":{"name":"Materialia","volume":"39 ","pages":"Article 102378"},"PeriodicalIF":3.0,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143445143","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}

引用次数: 0

Magnesophilic Cu (110) facet enables highly reversible Mg stripping/plating

IF 3

Materialia Pub Date : 2025-02-15 DOI: 10.1016/j.mtla.2025.102377

Yating Tang , Baihua Qu , Dong Wang , Yuhang Chen , Yue Hao , Jili Yue , Guangsheng Huang , Qian Li , Jingfeng Wang , Xianhua Chen , Fusheng Pan

引用次数: 0

A catalogue of metallic glass-forming alloy systems

IF 3

Materialia Pub Date : 2025-02-15 DOI: 10.1016/j.mtla.2025.102375

Weijie Xie , Mingxing Li , Yitao Sun , Chao Wang , Liwei Hu , Yanhui Liu

引用次数: 0

Enhanced low-cycle fatigue life of an extruded AZ31B alloy after pre-ratcheting deformation

IF 3

Materialia Pub Date : 2025-02-15 DOI: 10.1016/j.mtla.2025.102379

Linghui Song , Guosheng Duan , Chongtao Han , Jixue Zhou , Hongtao Liu , Yunteng Liu , Baolin Wu

引用次数: 0

Reactive molecular dynamics based multiaxial failure analysis of jennite

IF 3

Materialia Pub Date : 2025-02-15 DOI: 10.1016/j.mtla.2025.102368

Prodip Kumar Sarkar , Nilanjan Mitra , Jorge S. Dolado

引用次数: 0

Combining nanoindentation and Bragg coherent diffraction imaging to investigate small-scale plasticity

IF 3

Materialia Pub Date : 2025-02-15 DOI: 10.1016/j.mtla.2025.102376

Solène Comby-Dassonneville , Guillaume Beutier , Guillaume Parry , Steven Leake , Frédéric Charlot , Fabien Volpi , Marc Verdier

{"title":"Combining nanoindentation and Bragg coherent diffraction imaging to investigate small-scale plasticity","authors":"Solène Comby-Dassonneville , Guillaume Beutier , Guillaume Parry , Steven Leake , Frédéric Charlot , Fabien Volpi , Marc Verdier","doi":"10.1016/j.mtla.2025.102376","DOIUrl":"10.1016/j.mtla.2025.102376","url":null,"abstract":"<div><div>The mechanical properties of materials at the nanoscale are still poorly understood, despite intensive research efforts, in particular because mechanical tests are blind to the detailed microstructure of the samples. The latter is however crucial at small scales, when stochastic response dominates the initial elasto-plastic transition. To extract a comprehensive mechanical behavior at this scale, and despite this stochastic aspect, studying a large population of nano-objects is necessary. Additionally, investigating the early stage of the plasticity, correlated with the initial microstructure of the nano-objects, is essential. In this regard, we use a statistical approach to extract deterministic laws from various techniques such as nano-compression or nanoindentation, and we discuss the results in light with Bragg coherent diffraction imaging (BCDI) which provides the detailed crystalline state of the sample before and after mechanical testing. This <em>ex situ</em> approach is able to provide a more complete description of plastic behavior at small and large strains.</div></div>","PeriodicalId":47623,"journal":{"name":"Materialia","volume":"39 ","pages":"Article 102376"},"PeriodicalIF":3.0,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143453312","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

On the low temperature deformation behavior of a warm rolled 304L-type stainless steel

IF 3

Materialia Pub Date : 2025-02-13 DOI: 10.1016/j.mtla.2025.102372

M. Odnobokova , P. Dolzhenko , N. Enikeev , R.Z. Valiev , R. Kaibyshev , A. Belyakov

{"title":"On the low temperature deformation behavior of a warm rolled 304L-type stainless steel","authors":"M. Odnobokova , P. Dolzhenko , N. Enikeev , R.Z. Valiev , R. Kaibyshev , A. Belyakov","doi":"10.1016/j.mtla.2025.102372","DOIUrl":"10.1016/j.mtla.2025.102372","url":null,"abstract":"<div><div>The deformation behavior of a warm rolled 304L-type austenitic stainless steel was studied by means of tensile tests at temperatures of 213 – 293 K. The starting material was subjected to warm rolling to a strain of 0.5 at 573 K. This warm working promoted the α'-martensite formation upon subsequent tensile tests at lowered temperatures owing to shortening the transformation critical strain. The fraction of α'-martensite comprised more than 0.2 after tension to a strain of 0.3 at 293 K, whereas that was above 0.8 at 213 K. Moreover, the cold deformation was accompanied by twinning and the development of strain-induced grain boundaries leading to submicrocrystalline microstructure evolution. The deformation behavior during tensile tests was characterized by a rapid increase in the flow stress in the strain range of 0.1 – 0.25 that was more pronounced at a lower temperature. The tensile flow stress could be related to the dislocation density, which in turn can be expressed by a function of strain, taking into account the grain subdivision by strain-induced boundaries and martensitic transformation.</div></div>","PeriodicalId":47623,"journal":{"name":"Materialia","volume":"39 ","pages":"Article 102372"},"PeriodicalIF":3.0,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143419597","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of the source of yttrium on the morphology of precipitated phases after interaction with a CaO-Al2O3-SiO2 melt at 1300°C

IF 3

Materialia Pub Date : 2025-02-13 DOI: 10.1016/j.mtla.2025.102374

J. Bonnal , C. Petitjean , P.J. Panteix , L. Saint-Jean , D. Bonina , S. Arnal , M. Vilasi

{"title":"Influence of the source of yttrium on the morphology of precipitated phases after interaction with a CaO-Al2O3-SiO2 melt at 1300°C","authors":"J. Bonnal , C. Petitjean , P.J. Panteix , L. Saint-Jean , D. Bonina , S. Arnal , M. Vilasi","doi":"10.1016/j.mtla.2025.102374","DOIUrl":"10.1016/j.mtla.2025.102374","url":null,"abstract":"<div><div>The durability of the ceramic coatings used to protect the turbine blades in the field of aeronautical engines is strongly linked to their ability to withstand corrosion by calcium-magnesium-aluminosilicates (i.e. CMAS), which can infiltrate their microstructure when liquid at high temperature. Protection can be provided thanks to the high reactivity of the ceramic coatings with CMAS leading to the fast precipitation of protective phases. Most ceramic coatings contain rare-earth elements (e.g. rare-earth monosilicates RE<sub>2</sub>SiO<sub>5</sub> or rare-earth disilicates RE<sub>2</sub>Si<sub>2</sub>O<sub>7</sub>), making them thus able to form oxyapatite after reaction with the silicate melts. The present works proposes to study the morphology of these precipitated phases depending on the nature of the rare-earth source. A model ternary melt CaO-Al<sub>2</sub>O<sub>3</sub>-SiO<sub>2</sub> has thus been put in contact at 1300 °C with different sources of yttrium: oxide Y<sub>2</sub>O<sub>3</sub>, monosilicate Y<sub>2</sub>SiO<sub>5</sub> and disilicate Y<sub>2</sub>Si<sub>2</sub>O<sub>7</sub>. The reactivity led to the precipitation of the two phases of interest (i.e. apatite Ca<sub>2</sub>Y<sub>8</sub>(SiO<sub>4</sub>)<sub>6</sub>O<sub>2</sub> and cyclosilicate Ca<sub>3</sub>Y<sub>2</sub>(Si<sub>3</sub>O<sub>9</sub>)<sub>2</sub>). The use of these simplified systems allows to establish the precipitation mechanisms of the phases at equilibrium regarding previously established phase diagrams. Depending on the yttrium source, the chemical reactions involved local modifications of the melt composition, which strongly influenced the morphology of the precipitated phases at equilibrium. Specifically, it is demonstrated here that the release of SiO<sub>2</sub> in the melt when starting from yttrium disilicate involves a specific microstructure of the acicular apatite, which exhibits a core containing precipitated SiO<sub>2</sub>.</div></div>","PeriodicalId":47623,"journal":{"name":"Materialia","volume":"39 ","pages":"Article 102374"},"PeriodicalIF":3.0,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143419596","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","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 strain rate on mechanical properties and microstructural evolution in a ferrite austenite duplex medium Mn steel

IF 3

Materialia Pub Date : 2025-02-12 DOI: 10.1016/j.mtla.2025.102373

J.J. Mao , L. Liu , Z.Y. Liang

{"title":"Effect of strain rate on mechanical properties and microstructural evolution in a ferrite austenite duplex medium Mn steel","authors":"J.J. Mao , L. Liu , Z.Y. Liang","doi":"10.1016/j.mtla.2025.102373","DOIUrl":"10.1016/j.mtla.2025.102373","url":null,"abstract":"<div><div>Here, we explored the mechanical behavior and microstructural evolution of a ferrite-austenite duplex medium Mn steel under extremely high strain rate (10<sup>3</sup> s<sup>-1</sup>). It is found that the yield strength increases by 135 MPa with the increase of strain rate from 10<sup>–3</sup> to 10<sup>3</sup> s<sup>-1</sup>. Yet, the strain hardening rate decreases significantly, resulting in a lower ultimate tensile strength and a reduced uniform elongation. Microstructural analysis and thermodynamic calculations reveal that dislocation multiplication is promoted by high-strain-rate deformation at the small strain of 4.0 %. At large strains, adiabatic heating causes a substantial temperature increase, reaching 367 K at the engineering strain of 25.9 %. This temperature rise leads to a significant increase in the stacking fault energy of austenite, suppressing transformation-induced plasticity effect. The elevated temperature also enhances dynamic recovery of dislocations, inhibiting dislocation multiplication during high-strain-rate deformation. As a result, the suppressions of both transform-induced plasticity effect and dislocation multiplication result in the decrease of strain hardening rate.</div></div>","PeriodicalId":47623,"journal":{"name":"Materialia","volume":"39 ","pages":"Article 102373"},"PeriodicalIF":3.0,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143419599","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0