Materialia最新文献_第10页

Study of the microstructure and temperature dependent luminescence of Na- and Li-beta gallia rutile compounds

IF 3

Materialia Pub Date : 2024-12-01 DOI: 10.1016/j.mtla.2024.102302

Marina García-Carrión, Ruth Martínez-Casado, Emilio Nogales, Bianchi Méndez

引用次数: 0

The effect of athermal omega on the transformation behaviour of Ti-24Nb-4Zr-8Sn (wt%)

IF 3

Materialia Pub Date : 2024-12-01 DOI: 10.1016/j.mtla.2024.102266

N.L. Church, J.Y. Ang, O.G. Reed, O.E. Gibson, N.G. Jones

引用次数: 0

Erratum to ‘“High-entropy polymers”: A new route of polymer mixing with suppressed phase separation’ [Materialia, 15C (2021) 100978]

IF 3

Materialia Pub Date : 2024-12-01 DOI: 10.1016/j.mtla.2024.102265

Yu-Jr Huang , Jien-Wei Yeh , Arnold C.-M. Yang

引用次数: 0

Achieving tunable and interconnected porosity of biomimetic apatite scaffolds through Pickering emulsion templates

IF 3

Materialia Pub Date : 2024-11-30 DOI: 10.1016/j.mtla.2024.102308

Karline Pascaud , Christophe Tenailleau , Benjamin Duployer , Romain Sescousse , Fabien Brouillet , Cristiano C. Jayme , Daniela S. Fernandes , Antonio C. Tedesco , Stéphanie Sarda , Maria Ines Ré

{"title":"Achieving tunable and interconnected porosity of biomimetic apatite scaffolds through Pickering emulsion templates","authors":"Karline Pascaud , Christophe Tenailleau , Benjamin Duployer , Romain Sescousse , Fabien Brouillet , Cristiano C. Jayme , Daniela S. Fernandes , Antonio C. Tedesco , Stéphanie Sarda , Maria Ines Ré","doi":"10.1016/j.mtla.2024.102308","DOIUrl":"10.1016/j.mtla.2024.102308","url":null,"abstract":"<div><div>Synthetic apatitic calcium phosphates are widely used to develop biomaterial devices due to their excellent biological properties. The aim of this study was to develop nanocrystalline apatitic calcium phosphates (NCA) bioceramics with tunable porosity (size of pores, total porosity percent) to preserve surface reactivity and improve bioactivity based on an original manufacturing process. For this purpose, a low-temperature method of elaboration via Pickering emulsions was used and the influence of several process parameters (emulsion-to-gel weight ratio and formulation of the emulsion) on the properties of the bioceramics was studied. This process allows the formation of NCA crystals–based materials as shown by X-ray diffraction and FTIR spectroscopy. The initial conditions of the emulsion control the final porous structure evidenced by X-ray micro-computed tomography: if the diameter of the droplets of the starting emulsions controls the pores size, it does not influence the total porosity percent and interconnection which depend only on the emulsion-to-gel ratio. The viability of the scaffolds was assessed using the osteoblast cell line in two steps: cell adhesion assays and photobiomodulation. None of the scaffolds showed cytotoxic effects. With the proposed process, scaffolds were obtained with controlled pore size and interconnected pores, composed of reactive biomimetic apatites with mechanical properties suitable for applications in filling bone defects and good osteoblastic adhesion and proliferation properties.</div></div>","PeriodicalId":47623,"journal":{"name":"Materialia","volume":"39 ","pages":"Article 102308"},"PeriodicalIF":3.0,"publicationDate":"2024-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143173184","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

Cryogenic temperature tensile properties of laser powder bed fused Ti-6Al-4V

IF 3

Materialia Pub Date : 2024-11-28 DOI: 10.1016/j.mtla.2024.102307

Jayaraj Radhakrishnan , Gaurav Singh , Punit Kumar , Niraj Nayan , Upadrasta Ramamurty

{"title":"Cryogenic temperature tensile properties of laser powder bed fused Ti-6Al-4V","authors":"Jayaraj Radhakrishnan , Gaurav Singh , Punit Kumar , Niraj Nayan , Upadrasta Ramamurty","doi":"10.1016/j.mtla.2024.102307","DOIUrl":"10.1016/j.mtla.2024.102307","url":null,"abstract":"<div><div>Unnotched and notched tensile properties of Ti-6Al-4V (Ti64) alloy, additively manufactured using the laser powder bed fusion (LPBF) technique, at cryogenic temperatures of 90, 77 and 20 K were investigated. The LPBF process parameter combination was chosen such that the investigated alloy has not only a minimum in porosity, but also an equiaxed prior β microstructure, which predominantly contains acicular α/α’ lath structure in basket-weave morphology, that results in a high strength and ductility combination as well as insignificant mechanical anisotropy at room temperature (300 K). Tensile tests revealed that the yield (<em>σ</em><sub>y</sub>) and tensile (<em>σ</em><sub>u</sub>) strengths of LPBF Ti64 are superior while elongation to failure (<em>e</em><sub>f</sub>) is comparable to those of the conventionally manufactured (CM) Ti64 down to 77 K, owing to the fine α/α’ lath microstructure in the former. While the progressive reduction of <<em>a</em>>-basal and prismatic dislocation slip activity with decreasing deformation temperature enables a steep rise in <em>σ</em><sub>y</sub>, the unnotched specimens fractured catastrophically without macroscopic yielding at 20 K. Detailed postmortem analyses revealed the absence of significant twinning-based deformation in LPBF Ti64, in stark contrast to the CM ones at cryogenic temperatures. Instead, deformation kink bands with varying sizes and misorientation were found to be increasingly active within the prior β grains. A large misorientation at the kink band boundary within the β grain leads to void nucleation followed by crack growth, which eventually results in brittle failure at 20 K. While relatively notch insensitive from 300 to 77 K, LPBF Ti64 was notch brittle at 20 K. These results highlight the importance of the unique hierarchical micro- and meso‑structural features of LPBF Ti64 on the tensile mechanical behavior, especially at cryogenic temperatures.</div></div>","PeriodicalId":47623,"journal":{"name":"Materialia","volume":"39 ","pages":"Article 102307"},"PeriodicalIF":3.0,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143173183","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

Nucleation of recrystallization: A new approach to consider the evolution of the substructure in the system 再结晶的成核：考虑系统中子结构演变的新方法

IF 3

Materialia Pub Date : 2024-11-24 DOI: 10.1016/j.mtla.2024.102301

Louis Hennocque , Julien Favre , Nicolas Meyer , Thomas Sourisseau , David Piot , Frank Montheillet , Laurence Latu-Romain , Guillaume Kermouche

{"title":"Nucleation of recrystallization: A new approach to consider the evolution of the substructure in the system","authors":"Louis Hennocque , Julien Favre , Nicolas Meyer , Thomas Sourisseau , David Piot , Frank Montheillet , Laurence Latu-Romain , Guillaume Kermouche","doi":"10.1016/j.mtla.2024.102301","DOIUrl":"10.1016/j.mtla.2024.102301","url":null,"abstract":"<div><div>The mechanisms of nucleation during dynamic and static recrystallization still remain unclear, particularly with respect to their precise formulation into equations, and the specific implications of subgrains features on these mechanisms. In this paper, it is proposed to correlate the grain nucleation with subgrains and low-angle boundaries misorientation evolution. A nucleation criterion that takes into account the low-angle boundary density evolution in the system is established based on thermodynamic considerations. This new approach is based on a reformulation of the Bailey-Hirsch criterion and is derived from calculations of the equilibrium pressure on grain boundaries. The free energy calculations associated with this criterion allow a fine phenomenological description of the associated nucleation frequency. This new approach is tested in the case of recrystallization of a ferritic stainless steel grade during hot compression tests. The evolution of the substructure is then studied for different holding times up to 20 s after hot compression. It appears that the nucleation frequency based on the proposed nucleation criterion is in agreement with the nucleation frequency derived from experimental observations. This approach allows a better understanding of the mechanisms governing the ability of a subgrain to nucleate in a given system, using rather simple assumptions.</div></div>","PeriodicalId":47623,"journal":{"name":"Materialia","volume":"38 ","pages":"Article 102301"},"PeriodicalIF":3.0,"publicationDate":"2024-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142720120","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

Thermoelectric properties of Bi2Te3-based prepared by directional solidification under a high magnetic field 高磁场下定向凝固制备的基于 Bi2Te3 的热电特性

IF 3

Materialia Pub Date : 2024-11-23 DOI: 10.1016/j.mtla.2024.102294

Meiling Li , Mingwei Hu , Yaning Wang , Yonghui Ma , Yi Yuan , Tahashi Masahiro , Qiang Wang

{"title":"Thermoelectric properties of Bi2Te3-based prepared by directional solidification under a high magnetic field","authors":"Meiling Li , Mingwei Hu , Yaning Wang , Yonghui Ma , Yi Yuan , Tahashi Masahiro , Qiang Wang","doi":"10.1016/j.mtla.2024.102294","DOIUrl":"10.1016/j.mtla.2024.102294","url":null,"abstract":"<div><div>This study reports a significant enhancement of the thermoelectric properties of Bi<sub>2</sub>Te<sub>3</sub>-based materials achieved by modifying their internal microstructure via the high magnetic field-directed solidification method. The magnetic moment generated by the magnetic field leads to an optimal crystal orientation, drastically reducing the resistivity while maintaining the stability of the Seebeck coefficient. Consequently, the power factors of P-type Bi<sub>0.5</sub>Sb<sub>1.5</sub>Te<sub>3</sub> and N-type Bi<sub>2</sub>Te<sub>3</sub> samples were improved by 29.2 and 23.2 %, respectively. Furthermore, the thermoelectric magnetic force by the high magnetic field serves to refine the grain size and augment the source of phonon scatting, which effectively reduces the lattice thermal conductivity. Eventually, the <em>zT</em><sub>Max</sub> of the P-type Bi<sub>0.5</sub>Sb<sub>1.5</sub>Te<sub>3</sub> sample reaches 1.12, while that of the N-type Bi<sub>2</sub>Te<sub>3</sub> sample is 0.24, both higher than the value without the high magnetic field.</div></div>","PeriodicalId":47623,"journal":{"name":"Materialia","volume":"38 ","pages":"Article 102294"},"PeriodicalIF":3.0,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142720117","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 thermal history on performance of bulk metallic glass spacecraft components 热历史对块状金属玻璃航天器部件性能的影响

IF 3

Materialia Pub Date : 2024-11-22 DOI: 10.1016/j.mtla.2024.102298

Punnathat Bordeenithikasem, Richard Otis, Miguel B. Costa, Douglas C. Hofmann, R. Peter Dillon

引用次数: 0

Multi-phase-field lattice Boltzmann modeling and simulations of semi-solid simple shear deformation 半固态简单剪切变形的多相场晶格玻尔兹曼建模与模拟

IF 3

Materialia Pub Date : 2024-11-19 DOI: 10.1016/j.mtla.2024.102295

Namito Yamanaka , Shinmei Hayase , Shinji Sakane , Tomohiro Takaki

引用次数: 0

Tailored geochemical additives to inhibit CaO-MgO-Al2O3-SiO2 (CMAS) melt formation in gas turbine engines 抑制燃气涡轮发动机中 CaO-MgO-Al2O3-SiO2 (CMAS) 熔体形成的定制地球化学添加剂

IF 3

Materialia Pub Date : 2024-11-19 DOI: 10.1016/j.mtla.2024.102297

Jacob Elms , Alison Pawley , Nicholas Bojdo , Stephen Covey-Crump , Merren Jones , Rory Clarkson

{"title":"Tailored geochemical additives to inhibit CaO-MgO-Al2O3-SiO2 (CMAS) melt formation in gas turbine engines","authors":"Jacob Elms , Alison Pawley , Nicholas Bojdo , Stephen Covey-Crump , Merren Jones , Rory Clarkson","doi":"10.1016/j.mtla.2024.102297","DOIUrl":"10.1016/j.mtla.2024.102297","url":null,"abstract":"<div><div>Civil aircraft engines ingest significant quantities of mineral dusts during their operation in arid regions. These deposit on the engine components, melt at the elevated operating temperatures, and cause damage to the insulative Thermal Barrier Coatings (TBCs) that are critical to the durability of high temperature engine components. New melt-resistant TBCs may only mitigate damage effectively for specific deposit chemistries. We have investigated the use of tailored additives to change a deposit composition, raise its melting point and prevent melt formation. Only CaO-MgO-Al<sub>2</sub>O<sub>3</sub>-SiO<sub>2</sub> (CMAS) compositions were explored because deposits are typically simplified to this system. For our approach to work, it must be possible to reliably predict the composition, amount and melting temperatures of the deposited material and additive required to prevent melt formation at a given temperature. Experiments were performed between 1200 and 1400°C to investigate the chemistry and melting temperatures of a ‘deposit’ CMAS composition, and two ‘deposit + additives’ CMAS compositions produced by adding dolomite (CaMg[CO<sub>3</sub>]<sub>2</sub>) and/or periclase (MgO) to the ‘deposit’. We observed that enriching the starting material in CaO and MgO increased its melting temperature such that little to no melt would form on a high pressure turbine blade. Deviations of our liquidus temperatures from published liquidus diagrams show the need for further refinement of sections of the phase diagram. Greater understanding of the composition of airborne dusts around the world and their evolution inside aircraft engines is necessary before this approach can be used in practice.</div></div>","PeriodicalId":47623,"journal":{"name":"Materialia","volume":"38 ","pages":"Article 102297"},"PeriodicalIF":3.0,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142720116","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