Pub Date : 2025-03-19DOI: 10.1016/j.matlet.2025.138426
Huabing Yang , Ying Li , Kaiming Cheng , Yunteng Liu , Jianhua Wu , Hongtao Liu , Jin Wang , Dongqing Zhao , Linghui Song , Jixue Zhou , Xiangfa Liu
Traditional Al-Ti-B/C grain refiners subject to “poisoning effect” when Zr/Sc elements are contained in Al alloys during inoculation. To overcome the difficulty, an Al-2Sc-0.5B master alloy was prepared in this work. It was found that ScB2 and ScAl3 were the main secondary phases in the alloy. Introducing 0.01 % Sc using the Al-2Sc-0.5B to commercial purity Al-0.13Zr alloy, its α-Al grain size could be refined from 1179 μm to 646 μm. However, adding 0.01 %Sc using Al-2Sc master alloy which just contained secondary phase of ScAl3 showed nearly no grain refinement effect. It indicated that ScB2 played important role in the grain refinement. According to crystallographic analysis, (0001)ScB2 and (111)Al had the same atomic arrangement, and crystal mismatch between them was ∼ 7.71 % at 660℃. Thus, ScB2 was proposed a potential nucleation substrate for α-Al.
{"title":"Grain refinement effect of Al-Sc-B master alloy for Zr/Sc containing Al alloys","authors":"Huabing Yang , Ying Li , Kaiming Cheng , Yunteng Liu , Jianhua Wu , Hongtao Liu , Jin Wang , Dongqing Zhao , Linghui Song , Jixue Zhou , Xiangfa Liu","doi":"10.1016/j.matlet.2025.138426","DOIUrl":"10.1016/j.matlet.2025.138426","url":null,"abstract":"<div><div>Traditional Al-Ti-B/C grain refiners subject to “poisoning effect” when Zr/Sc elements are contained in Al alloys during inoculation. To overcome the difficulty, an Al-2Sc-0.5B master alloy was prepared in this work. It was found that ScB<sub>2</sub> and ScAl<sub>3</sub> were the main secondary phases in the alloy. Introducing 0.01 % Sc using the Al-2Sc-0.5B to commercial purity Al-0.13Zr alloy, its α-Al grain size could be refined from 1179 μm to 646 μm. However, adding 0.01 %Sc using Al-2Sc master alloy which just contained secondary phase of ScAl<sub>3</sub> showed nearly no grain refinement effect. It indicated that ScB<sub>2</sub> played important role in the grain refinement. According to crystallographic analysis, (0001)ScB<sub>2</sub> and (111)Al had the same atomic arrangement, and crystal mismatch between them was ∼ 7.71 % at 660℃. Thus, ScB<sub>2</sub> was proposed a potential nucleation substrate for α-Al.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"390 ","pages":"Article 138426"},"PeriodicalIF":2.7,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143683718","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}
Pub Date : 2025-03-19DOI: 10.1016/j.matlet.2025.138394
Mohammad Reza Abbasi Zargaleh , Moosa Mazloom , Mojtaba Jafari Samimi , Mohammad Hassan Ramesht
Given the abundance, reduced cost, and environmental advantages associated with the utilization of ground granulated blast furnace slag (GGBFS) as a substitute for fly ash, this investigation examines the influence of GGBFS replacement levels of 5, 10, 15, 20, 25, and 30 % on the fracture behavior of lightweight fly ash-based geopolymer concrete (LWFCGC). Concrete specimens were produced using different proportions of GGBFS and fly ash and cured at 80 °C. Subsequently, they were subjected to compressive, tensile, and three-point bending tests. The results indicate that replacing fly ash with GGBFS significantly influences the mechanical properties of geopolymer concrete. Generally, increasing the GGBFS replacement percentage up to 20 % led to higher compressive strength and reduced porosity. However, increasing the GGBFS from 20 % to 30 % led to lower compressive strength. Increasing the replacement percentage from 0 % to 30 % resulted in an increase in fracture toughness from 16.73 to 27.49 MPa√mm and fracture energy from 54.9 to 156.06 N/m. In conclusion, this study shows that GGBFS can be a suitable substitute for fly ash in geopolymer concrete to some extent. By carefully selecting the ratio of GGBFS to fly ash, geopolymer concrete with desirable mechanical properties, fracture parameters, and durability can be achieved.
{"title":"The effect of replacing fly ash with GGBFS on the fracture parameters of geopolymer concrete","authors":"Mohammad Reza Abbasi Zargaleh , Moosa Mazloom , Mojtaba Jafari Samimi , Mohammad Hassan Ramesht","doi":"10.1016/j.matlet.2025.138394","DOIUrl":"10.1016/j.matlet.2025.138394","url":null,"abstract":"<div><div>Given the abundance, reduced cost, and environmental advantages associated with the utilization of ground granulated blast furnace slag (GGBFS) as a substitute for fly ash, this investigation examines the influence of GGBFS replacement levels of 5, 10, 15, 20, 25, and 30 % on the fracture behavior of lightweight fly ash-based geopolymer concrete (LWFCGC). Concrete specimens were produced using different proportions of GGBFS and fly ash and cured at 80 °C. Subsequently, they were subjected to compressive, tensile, and three-point bending tests. The results indicate that replacing fly ash with GGBFS significantly influences the mechanical properties of geopolymer concrete. Generally, increasing the GGBFS replacement percentage up to 20 % led to higher compressive strength and reduced porosity. However, increasing the GGBFS from 20 % to 30 % led to lower compressive strength. Increasing the replacement percentage from 0 % to 30 % resulted in an increase in fracture toughness from 16.73 to 27.49 MPa√mm and fracture energy from 54.9 to 156.06 N/m. In conclusion, this study shows that GGBFS can be a suitable substitute for fly ash in geopolymer concrete to some extent. By carefully selecting the ratio of GGBFS to fly ash, geopolymer concrete with desirable mechanical properties, fracture parameters, and durability can be achieved.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"390 ","pages":"Article 138394"},"PeriodicalIF":2.7,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143683706","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}
Pub Date : 2025-03-18DOI: 10.1016/j.matlet.2025.138424
Tongyu Lu , Zelin Wu , Haibo Wang , Chenbo Wang , Yuxuan Guo , Hui Wen , Zhiyong Zhao , Congwei Wang , Tao Huang , Junying Wang
Lithium manganese iron phosphate (LMFP) is increasingly attracting attention in the industry due to its excellent performance advantages. However, its limited electrical conductivity and lithium-ion diffusivity still hinder its practical application. In this paper, we introduced a method for the synthesis of LiMn0.8Fe0.2PO4/C nano spherical composites by using cetyltrimethylammonium bromide (CTAB)-assisted hydrothermal method. The material doped with 1 mmol of CTAB(LMFP/C-1) significantly prevented particle agglomeration and reduced the particle size, which improved the electrical conductivity of the material and exhibited excellent multiplicative and cycling properties. The results showed that LMFP-1can release the initial specific capacity around 152.4 mAh·g−1 at 0.1C, and the capacity retention rate was 94.35 % after 500 cycles at 1C. This research provides a method to improve the cathode materials for lithium-ion batteries.
{"title":"CTAB-assisted hydrothermal synthesis of C@LiMn0.8Fe0.2PO4 nanospherical cathode materials","authors":"Tongyu Lu , Zelin Wu , Haibo Wang , Chenbo Wang , Yuxuan Guo , Hui Wen , Zhiyong Zhao , Congwei Wang , Tao Huang , Junying Wang","doi":"10.1016/j.matlet.2025.138424","DOIUrl":"10.1016/j.matlet.2025.138424","url":null,"abstract":"<div><div>Lithium manganese iron phosphate (LMFP) is increasingly attracting attention in the industry due to its excellent performance advantages. However, its limited electrical conductivity and lithium-ion diffusivity still hinder its practical application. In this paper, we introduced a method for the synthesis of LiMn<sub>0.8</sub>Fe<sub>0.2</sub>PO<sub>4</sub>/C nano spherical composites by using cetyltrimethylammonium bromide (CTAB)-assisted hydrothermal method. The material doped with 1 mmol of CTAB(LMFP/C-1) significantly prevented particle agglomeration and reduced the particle size, which improved the electrical conductivity of the material and exhibited excellent multiplicative and cycling properties. The results showed that LMFP-1can release the initial specific capacity around 152.4 mAh·g<sup>−1</sup> at 0.1C, and the capacity retention rate was 94.35 % after 500 cycles at 1C. This research provides a method to improve the cathode materials for lithium-ion batteries.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"390 ","pages":"Article 138424"},"PeriodicalIF":2.7,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143683590","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}
Phosphors based on europium-doped silicon nitride were produced using combustion synthesis with preliminary mechanical treatment of starting mixtures (silicon + europium oxide). Phase composition, electronic state, and luminescent properties of the samples were investigated. It was established that complete reduction of Eu3+ to Eu2+ occurred during synthesis, and the Eu3+ ion located on the surface of the particles did not affect the luminescent properties of the samples. The synthesized material, β-Si3N4:Eu, exhibited fluorescence in the blue (439 nm) and yellow-green (560 nm) regions of the visible light spectrum. With increasing Eu concentration, a shift of the phosphorescence spectra in the red region from 616 nm to 632 nm was observed.
{"title":"Combustion synthesis of blue and yellow-green β-Si3N4:Eu phosphor with preliminary mechanical treatment","authors":"O.G. Kryukova , A.A. Nevmyvaka , K.A. Bolgaru , P.E. Vashurkin , T.V. Tatarinova , R.M. Gadirov","doi":"10.1016/j.matlet.2025.138415","DOIUrl":"10.1016/j.matlet.2025.138415","url":null,"abstract":"<div><div>Phosphors based on europium-doped silicon nitride were produced using combustion synthesis with preliminary mechanical treatment of starting mixtures (silicon + europium oxide). Phase composition, electronic state, and luminescent properties of the samples were investigated. It was established that complete reduction of Eu<sup>3+</sup> to Eu<sup>2+</sup> occurred during synthesis, and the Eu<sup>3+</sup> ion located on the surface of the particles did not affect the luminescent properties of the samples. The synthesized material, β-Si<sub>3</sub>N<sub>4</sub>:Eu, exhibited fluorescence in the blue (439 nm) and yellow-green (560 nm) regions of the visible light spectrum. With increasing Eu concentration, a shift of the phosphorescence spectra in the red region from 616 nm to 632 nm was observed.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"390 ","pages":"Article 138415"},"PeriodicalIF":2.7,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143683720","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}
Pub Date : 2025-03-18DOI: 10.1016/j.matlet.2025.138420
Xianwu Cao, Zijie Wang, Qilong Huang, Wanjing Zhao, Zhitao Yang
The exponential expansion of the telecommunications electronics and industry has driven a surge in demand for low dielectric thin film materials, which are extensively employed as interlayer dielectrics in electronic packaging, as sealing materials, and as substrates for flexible copper-clad laminates. In this paper, mesoporous silica with hollow nanopore structure (MCM-41), sealed with perfluorosilane coupling agent, was introduced into polyimide (PI) matrix by in-situ polymerization to prepare modified MCM-41/PI composite films. The longer fluorine-containing branched chain in 1H,1H,2H,2H-perfluorodecyltrimethoxysilane (THFS) brings better interfacial compatibility and dispersion compared to 1H,1H,2H,2H-perfluorooctyltrimethoxysilane (TTFS). As a result, the PI composite film containing 3 wt% of MCM@THFS (MCM@THFS/PI-3) shows the excellent comprehensive performance among all films, with its dielectric constant decreasing to 2.14@1 MHz, its coefficient of thermal expansion (CTE) value decreasing to 50.78 ppm/K, and its water contact angle improving to 85.43°. Obviously, MCM@THFS/PI-3 shows great potential for application in the field of low dielectric.
{"title":"Development of low-dielectric polyimide composites based on perfluorosilane coupling agent sealed mesoporous silica","authors":"Xianwu Cao, Zijie Wang, Qilong Huang, Wanjing Zhao, Zhitao Yang","doi":"10.1016/j.matlet.2025.138420","DOIUrl":"10.1016/j.matlet.2025.138420","url":null,"abstract":"<div><div>The exponential expansion of the telecommunications electronics and industry has driven a surge in demand for low dielectric thin film materials, which are extensively employed as interlayer dielectrics in electronic packaging, as sealing materials, and as substrates for flexible copper-clad laminates. In this paper, mesoporous silica with hollow nanopore structure (MCM-41), sealed with perfluorosilane coupling agent, was introduced into polyimide (PI) matrix by in-situ polymerization to prepare modified MCM-41/PI composite films. The longer fluorine-containing branched chain in 1H,1H,2H,2H-perfluorodecyltrimethoxysilane (THFS) brings better interfacial compatibility and dispersion compared to 1H,1H,2H,2H-perfluorooctyltrimethoxysilane (TTFS). As a result, the PI composite film containing 3 wt% of MCM@THFS (MCM@THFS/PI-3) shows the excellent comprehensive performance among all films, with its dielectric constant decreasing to 2.14@1 MHz, its coefficient of thermal expansion (CTE) value decreasing to 50.78 ppm/K, and its water contact angle improving to 85.43°. Obviously, MCM@THFS/PI-3 shows great potential for application in the field of low dielectric.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"390 ","pages":"Article 138420"},"PeriodicalIF":2.7,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143683649","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}
Pub Date : 2025-03-18DOI: 10.1016/j.matlet.2025.138418
Geng Xie , Bin Zhang , Hailong Liu , Dongqun Xin , Yan Cai , Weidong Mu
This study presents a novel design strategy for enhancing performance of WC-10Co-4Cr coatings by incorporation of nano-CeO2 into multi-scale WC particles, applied via high-velocity oxygen fuel (HVOF) spraying. The aim is to concurrently improve hardness and toughness, addressing trade-off typically observed in these coatings. Four types of coatings were prepared: submicrostructured, nanostructured, multi-scale, and nano-CeO2-modified multi-scale coatings. The results demonstrated that multi-scale coating, particularly when modified with nano-CeO2, exhibited superior hardness and fracture toughness compared to conventional micron or nano-structured coatings. Addition of nano-CeO2 effectively inhibited decarburization during HVOF process, reducing formation of brittle W2C phases and lowering porosity. This led to a more uniform distribution of WC particles and enhanced interfacial bonding, resulting in a denser and more resilient coating structure. Nano-CeO2-modified multi-scale coating achieved an optimal balance between hardness and toughness, offering a promising pathway for development of high-performance WC-Co(Cr) coatings for demanding industrial applications.
{"title":"Simultaneous enhancement of hardness and toughness of nano-CeO2 modified multi-scale WC-10Co-4Cr coating via HVOF","authors":"Geng Xie , Bin Zhang , Hailong Liu , Dongqun Xin , Yan Cai , Weidong Mu","doi":"10.1016/j.matlet.2025.138418","DOIUrl":"10.1016/j.matlet.2025.138418","url":null,"abstract":"<div><div>This study presents a novel design strategy for enhancing performance of WC-10Co-4Cr coatings by incorporation of nano-CeO<sub>2</sub> into multi-scale WC particles, applied via high-velocity oxygen fuel (HVOF) spraying. The aim is to concurrently improve hardness and toughness, addressing trade-off typically observed in these coatings. Four types of coatings were prepared: submicrostructured, nanostructured, multi-scale, and nano-CeO<sub>2</sub>-modified multi-scale coatings. The results demonstrated that multi-scale coating, particularly when modified with nano-CeO<sub>2</sub>, exhibited superior hardness and fracture toughness compared to conventional micron or nano-structured coatings. Addition of nano-CeO<sub>2</sub> effectively inhibited decarburization during HVOF process, reducing formation of brittle W<sub>2</sub>C phases and lowering porosity. This led to a more uniform distribution of WC particles and enhanced interfacial bonding, resulting in a denser and more resilient coating structure. Nano-CeO<sub>2</sub>-modified multi-scale coating achieved an optimal balance between hardness and toughness, offering a promising pathway for development of high-performance WC-Co(Cr) coatings for demanding industrial applications.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"390 ","pages":"Article 138418"},"PeriodicalIF":2.7,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143683715","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}
Pub Date : 2025-03-18DOI: 10.1016/j.matlet.2025.138422
Dayuan Cai, Yang Xu, Yaxin Guo, Dongyun Li, Rui Wang, Fan Wang
In2O3 and In2S3 are emerging semiconductor materials that exhibit excellent optoelectronic properties due to their wide bandgap, high catalytic activity, and low resistivity. This paper presents the fabrication of nano In2O3/In2S3 heterostructure composites using sol–gel and hydrothermal methods, resulting in the formation of a P–N junction at their contact surface to enhance the photoelectric conversion efficiency of the materials. The microstructure, crystalline characteristics, and optoelectronic properties of the samples were characterized. The research indicates that the In2O3/In2S3 heterojunction material is nano flower-shaped and structurally stable. Notably, In2O3/In2S3-40 exhibits a smaller bandgap value of 2.22 eV, with a light response intensity approximately three times greater than that of blank In2S3, measuring about 15 μA/cm2. The introduction of In2O3 significantly enhances the visible light absorption capacity and the separation efficiency of photo-generated electron-hole pairs in In2S3.
{"title":"Research on the construction and optoelectronic properties of In2O3/In2S3 heterostructure","authors":"Dayuan Cai, Yang Xu, Yaxin Guo, Dongyun Li, Rui Wang, Fan Wang","doi":"10.1016/j.matlet.2025.138422","DOIUrl":"10.1016/j.matlet.2025.138422","url":null,"abstract":"<div><div>In<sub>2</sub>O<sub>3</sub> and In<sub>2</sub>S<sub>3</sub> are emerging semiconductor materials that exhibit excellent optoelectronic properties due to their wide bandgap, high catalytic activity, and low resistivity. This paper presents the fabrication of nano In<sub>2</sub>O<sub>3</sub>/In<sub>2</sub>S<sub>3</sub> heterostructure composites using sol–gel and hydrothermal methods, resulting in the formation of a P–N junction at their contact surface to enhance the photoelectric conversion efficiency of the materials. The microstructure, crystalline characteristics, and optoelectronic properties of the samples were characterized. The research indicates that the In<sub>2</sub>O<sub>3</sub>/In<sub>2</sub>S<sub>3</sub> heterojunction material is nano flower-shaped and structurally stable. Notably, In<sub>2</sub>O<sub>3</sub>/In<sub>2</sub>S<sub>3</sub>-40 exhibits a smaller bandgap value of 2.22 eV, with a light response intensity approximately three times greater than that of blank In<sub>2</sub>S<sub>3</sub>, measuring about 15 μA/cm<sup>2</sup>. The introduction of In<sub>2</sub>O<sub>3</sub> significantly enhances the visible light absorption capacity and the separation efficiency of photo-generated electron-hole pairs in In<sub>2</sub>S<sub>3</sub>.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"390 ","pages":"Article 138422"},"PeriodicalIF":2.7,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143683719","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}
In order to investigate the effects of W and Ti doping on VO2, we investigate the energy band structure, density of states, and Helmholtz free energy of formation of pure VO2 and doped systems (W-doped, Ti-doped, and W-Ti-codoped) using first-principles calculations in this paper. We also perform approximate calculations of the phase transition temperature and transmittance. The results show that W doping decreases the phase transition temperature to 287 K (by 15.5 %); Ti doping increases it to 356 K (by 4.7 %); W-Ti co-doping decreases it to 314 K (by 7.6 %). For the material transmittance calculations, take 750 nm wavelength as an example; W doping reduces transmittance by 13.15 %, Ti doping increases it by 8.26 %, and W-Ti codoping decreases it by 2.68 %. This suggests that there is a difference in the degree of influence of W and Ti on phase transition temperatures and transmittances. These findings provide a new theoretical approach for VO2 preparation through W-Ti codoping.
{"title":"Effect of W and Ti on the phase transition temperature and optical properties of VO2 Analyzed by First-Principles","authors":"Houlong Zhang, Shengbin Zhang, Shaoyang Zhu, Guoqing Cai, Xiaopeng Ding","doi":"10.1016/j.matlet.2025.138423","DOIUrl":"10.1016/j.matlet.2025.138423","url":null,"abstract":"<div><div>In order to investigate the effects of W and Ti doping on VO<sub>2</sub>,<!--> <!-->we investigate<!--> <!-->the energy band structure, density of states, and Helmholtz free energy of formation of pure VO<sub>2</sub> and doped systems (W-doped, Ti-doped, and W-Ti-codoped)<!--> <!-->using<!--> <!-->first-principles calculations in this paper.<!--> <!-->We also perform<!--> <!-->approximate calculations of the phase transition temperature and transmittance. The results show that W doping decreases the phase transition temperature to <em>287 K</em> (by <em>15.5 %</em>); Ti doping increases it to <em>356 K</em> (by <em>4.7 %</em>); W-Ti co-doping decreases it to <em>314 K</em> (by <em>7.6 %</em>). For the material transmittance calculations, take 750 nm wavelength as an example; W doping reduces transmittance by 13.15 %, Ti doping increases it by 8.26 %, and W-Ti codoping decreases it by 2.68 %. This suggests that there is a difference in the degree of influence of W and Ti on phase transition temperatures and transmittances. These findings provide a new theoretical approach for VO<sub>2</sub> preparation<!--> <!-->through W-Ti codoping.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"390 ","pages":"Article 138423"},"PeriodicalIF":2.7,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143683650","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}
Pub Date : 2025-03-17DOI: 10.1016/j.matlet.2025.138417
Ibrahim H. ZainElabdeen , Wesley Cantwell , Rehan Umer , Kamran A. Khan
This study investigates the microstructure, tensile, and bending properties of AlSi10Mg/AA6061 bimetals fabricated via Laser Powder Bed Fusion (LPBF) in both butt and laminate configurations. Microstructural analysis reveals an interfacial zone, 40–100 μm thick, exhibiting strong metallurgical bonding facilitated by Marangoni convection and silicon diffusion. Tensile tests indicate ultimate tensile strengths (UTS) ranging from 307 to 314 MPa. Three-point bending tests highlight a configuration-dependent performance: laminated specimens with AA6061 under tension achieve exceptional bending strength (655 MPa, approximately 2 % higher than monolithic AlSi10Mg) and an elongation of 12.5 %, matching the ductility of AA6061. In contrast, butt joints exhibit minor strength reductions (596 MPa), due to small interfacial microcracks resulting from residual stresses. Digital image correlation confirms that strain localization patterns are governed by material modulus and hardening characteristics.
{"title":"Processing effect on microstructures and flexural response of AlSi10Mg/AA 6061 multi-material fabricated by laser powder bed fusion","authors":"Ibrahim H. ZainElabdeen , Wesley Cantwell , Rehan Umer , Kamran A. Khan","doi":"10.1016/j.matlet.2025.138417","DOIUrl":"10.1016/j.matlet.2025.138417","url":null,"abstract":"<div><div>This study investigates the microstructure, tensile, and bending properties of AlSi10Mg/AA6061 bimetals fabricated via Laser Powder Bed Fusion (LPBF) in both butt and laminate configurations. Microstructural analysis reveals an interfacial zone, 40–100 μm thick, exhibiting strong metallurgical bonding facilitated by Marangoni convection and silicon diffusion. Tensile tests indicate ultimate tensile strengths (UTS) ranging from 307 to 314 MPa. Three-point bending tests highlight a configuration-dependent performance: laminated specimens with AA6061 under tension achieve exceptional bending strength (655 MPa, approximately 2 % higher than monolithic AlSi10Mg) and an elongation of 12.5 %, matching the ductility of AA6061. In contrast, butt joints exhibit minor strength reductions (596 MPa), due to small interfacial microcracks resulting from residual stresses. Digital image correlation confirms that strain localization patterns are governed by material modulus and hardening characteristics.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"390 ","pages":"Article 138417"},"PeriodicalIF":2.7,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143683648","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}
Pub Date : 2025-03-17DOI: 10.1016/j.matlet.2025.138411
Oleg Belkin, Vladimir Chuvil’deev, Mikhail Chegurov, Aleksey Nokhrin, Anatoly Sysoev
The article presents the results of corrosion-fatigue tests of industrial Al-Mg alloys were conducted in air and in a 3%NaCl aqueous solution. Fatigue curves can be characterized using the Basquin equation and the plastic deformation model at the crack tip. It has been demonstrated that the primary contributions to corrosion-fatigue failure in the Al-Mg alloys at low stresses are made by the process of pitting and intergranular corrosion, and by the plastic deformation at high stresses.
{"title":"Analysis of contributions of plastic deformation and intergranular corrosion to corrosion-fatigue failure of Al-Mg alloys","authors":"Oleg Belkin, Vladimir Chuvil’deev, Mikhail Chegurov, Aleksey Nokhrin, Anatoly Sysoev","doi":"10.1016/j.matlet.2025.138411","DOIUrl":"10.1016/j.matlet.2025.138411","url":null,"abstract":"<div><div>The article presents the results of corrosion-fatigue tests of industrial Al-Mg alloys were conducted in air and in a 3%NaCl aqueous solution. Fatigue curves can be characterized using the Basquin equation and the plastic deformation model at the crack tip. It has been demonstrated that the primary contributions to corrosion-fatigue failure in the Al-Mg alloys at low stresses are made by the process of pitting and intergranular corrosion, and by the plastic deformation at high stresses.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"389 ","pages":"Article 138411"},"PeriodicalIF":2.7,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143643520","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}
扫码关注我们
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号