Materials & Design最新文献

英文中文

Fine-tuning of porous microchannelled silk fibroin scaffolds for optimal tissue ingrowth

IF 7.6 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials & Design

Pub Date : 2025-02-11 DOI: 10.1016/j.matdes.2025.113711

Wen Li , Yanzhen Zhao , Zhaojun Cheng , Fanhua Niu , Ji Ding , Yanli Bai , Zhenhua Li , Adam C. Midgley , Meifeng Zhu

Physical attributes of implantable scaffold materials such as pore architecture and pore size modulate regenerative outcomes by influencing vascularization and integration with host tissue. Silk fibroin (SF), renowned for its abundant availability and exceptional biocompatibility, has emerged as a choice material for scaffold fabrication, showcasing promising biomedical applications in tissue engineering and regenerative medicine. However, there remains a challenge in the design and manufacture of SF scaffolds with precisely tailored pore structures. Here, we combined sacrificial 3D-printed polymer template leaching and freeze-drying techniques to engineer SF scaffolds with controllable microchannel and pore structures. The resultant highly porous SF scaffolds were characterized by their directional microchannels and pore interconnectivity. We found that scaffold spanning microchannel incorporation combined with larger interconnecting pore structures elicited superior promotive effects on cell migration into the scaffold interior, enhancing rapid formation of vascular networks, and yielding the deposition of organized collagen matrices. Additionally, the porous nature of the scaffolds accelerated scaffold degradation through the enhanced recruitment of reparative M2-like macrophages, thereby contributing to neo-tissue formation. Our study advances the conceptual frameworks and strategies for fabricating and tuning porous SF scaffolds, offering a move toward expediting the clinical translation of tailored SF-based biomaterials.

{"title":"Fine-tuning of porous microchannelled silk fibroin scaffolds for optimal tissue ingrowth","authors":"Wen Li , Yanzhen Zhao , Zhaojun Cheng , Fanhua Niu , Ji Ding , Yanli Bai , Zhenhua Li , Adam C. Midgley , Meifeng Zhu","doi":"10.1016/j.matdes.2025.113711","DOIUrl":"10.1016/j.matdes.2025.113711","url":null,"abstract":"<div><div>Physical attributes of implantable scaffold materials such as pore architecture and pore size modulate regenerative outcomes by influencing vascularization and integration with host tissue. Silk fibroin (SF), renowned for its abundant availability and exceptional biocompatibility, has emerged as a choice material for scaffold fabrication, showcasing promising biomedical applications in tissue engineering and regenerative medicine. However, there remains a challenge in the design and manufacture of SF scaffolds with precisely tailored pore structures. Here, we combined sacrificial 3D-printed polymer template leaching and freeze-drying techniques to engineer SF scaffolds with controllable microchannel and pore structures. The resultant highly porous SF scaffolds were characterized by their directional microchannels and pore interconnectivity. We found that scaffold spanning microchannel incorporation combined with larger interconnecting pore structures elicited superior promotive effects on cell migration into the scaffold interior, enhancing rapid formation of vascular networks, and yielding the deposition of organized collagen matrices. Additionally, the porous nature of the scaffolds accelerated scaffold degradation through the enhanced recruitment of reparative M2-like macrophages, thereby contributing to neo-tissue formation. Our study advances the conceptual frameworks and strategies for fabricating and tuning porous SF scaffolds, offering a move toward expediting the clinical translation of tailored SF-based biomaterials.</div></div>","PeriodicalId":383,"journal":{"name":"Materials & Design","volume":"251 ","pages":"Article 113711"},"PeriodicalIF":7.6,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143394814","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Machine learning study on magnetic structure of rare earth based magnetic materials

IF 7.6 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials & Design

Pub Date : 2025-02-11 DOI: 10.1016/j.matdes.2025.113710

Dan Liu , Jiahe Song , Zhixin Liu , Jine Zhang , Weiqiang Chen , Yinong Yin , Jianfeng Xi , Xinqi Zheng , Jiazheng Hao , Tongyun Zhao , Fengxia Hu , Jirong Sun , Baogen Shen

Machine learning is playing an increasingly important role in discovery and design of new materials. In this work, 11 machine learning algorithms were trained to predict the material magnetic structure. Material composition and crystal structure are used to classify the dataset, and the relationship between multi-feature variables is constructed in a small sample space. The prediction accuracy of all models is above 0.73. Compared with non-decision tree models, optimized decision tree algorithms such as Gradient Boosting have greater advantages in binary classification. Neural Network has the best performance in predicting skyrmion structure, with accuracy and reliability of 0.93 and 97 %, respectively. Rare earth elements have a great influence on the material magnetic structure, and their proportion is negatively correlated with the generation of nonlinear or skyrmion structures. The material is more prone to nonlinear magnetic structure when the space group belongs to the cubic and the hexagonal crystal systems. Based on the Neural Network, the magnetic structures of several rare earth oxides are predicted. The skyrmion in SrR_xFe_12-_x_-_yMg_yO₁₉ and La_xBa_1-_xMnO₃ was observed by Neutron Powder Diffraction and magnetic force microscope, which effectively verified the model accuracy. This work provides new perspectives for machine learning in the discovery of nonlinear magnetic structures and rapid design of material compositions.

{"title":"Machine learning study on magnetic structure of rare earth based magnetic materials","authors":"Dan Liu , Jiahe Song , Zhixin Liu , Jine Zhang , Weiqiang Chen , Yinong Yin , Jianfeng Xi , Xinqi Zheng , Jiazheng Hao , Tongyun Zhao , Fengxia Hu , Jirong Sun , Baogen Shen","doi":"10.1016/j.matdes.2025.113710","DOIUrl":"10.1016/j.matdes.2025.113710","url":null,"abstract":"<div><div>Machine learning is playing an increasingly important role in discovery and design of new materials. In this work, 11 machine learning algorithms were trained to predict the material magnetic structure. Material composition and crystal structure are used to classify the dataset, and the relationship between multi-feature variables is constructed in a small sample space. The prediction accuracy of all models is above 0.73. Compared with non-decision tree models, optimized decision tree algorithms such as Gradient Boosting have greater advantages in binary classification. Neural Network has the best performance in predicting skyrmion structure, with accuracy and reliability of 0.93 and 97 %, respectively. Rare earth elements have a great influence on the material magnetic structure, and their proportion is negatively correlated with the generation of nonlinear or skyrmion structures. The material is more prone to nonlinear magnetic structure when the space group belongs to the cubic and the hexagonal crystal systems. Based on the Neural Network, the magnetic structures of several rare earth oxides are predicted. The skyrmion in SrR<em><sub>x</sub></em>Fe<sub>12-</sub><em><sub>x</sub></em><sub>-</sub><em><sub>y</sub></em>Mg<em><sub>y</sub></em>O<sub>19</sub> and La<em><sub>x</sub></em>Ba<sub>1-</sub><em><sub>x</sub></em>MnO<sub>3</sub> was observed by Neutron Powder Diffraction and magnetic force microscope, which effectively verified the model accuracy. This work provides new perspectives for machine learning in the discovery of nonlinear magnetic structures and rapid design of material compositions.</div></div>","PeriodicalId":383,"journal":{"name":"Materials & Design","volume":"251 ","pages":"Article 113710"},"PeriodicalIF":7.6,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143419619","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Single human umbilical cord blood stem cells in decellularized porcine dermis-derived extracellular matrix hydrogel promote healing of skin wounds

IF 7.6 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials & Design

Pub Date : 2025-02-11 DOI: 10.1016/j.matdes.2025.113712

Jin Hee Park , Seungki Lee , Jung Kyu Choi

This study aimed to investigate the effectiveness of a porcine decellularized dermis-derived extracellular matrix (dECM) hydrogel combined with single UC-MSCs and spheroids in promoting skin wound healing. Compared to native tissue, decellularized porcine dermis (DP) exhibited a remarkable decline of approximately 90 % in DNA content relative to the native tissue, as confirmed by the lack of nuclear staining observed through 4′,6-diamidino-2-phenylindole (DAPI) staining. Furthermore, histological analysis confirmed the presence of retained ECM components in the DP, and ECM components were quantified. Optimal concentrations of the dECM hydrogel (2, 4, and 6 mg/mL) for UC-MSCs cultivation were determined, and it was observed that a concentration of 2 mg/mL promoted better proliferation of UC-MSCs. The microstructure and mechanical strength of different dECM hydrogel concentrations were analyzed using scanning electron microscope (SEM) and rheometer. Both single UC-MSCs and spheroids in a 2 mg/mL ECM hydrogel were transplanted into mouse skin wound model to assess their effectiveness in promoting skin regeneration. It was confirmed that collagen and angiogenesis involved in skin regeneration were significantly (p < 0.05) increased in the ECM hydrogel with single UC-MSCs group, compared to spheroids MSCs. Therefore, these findings propose a promising therapeutic strategy for skin wound regeneration and recovery.

{"title":"Single human umbilical cord blood stem cells in decellularized porcine dermis-derived extracellular matrix hydrogel promote healing of skin wounds","authors":"Jin Hee Park , Seungki Lee , Jung Kyu Choi","doi":"10.1016/j.matdes.2025.113712","DOIUrl":"10.1016/j.matdes.2025.113712","url":null,"abstract":"<div><div>This study aimed to investigate the effectiveness of a porcine decellularized dermis-derived extracellular matrix (dECM) hydrogel combined with single UC-MSCs and spheroids in promoting skin wound healing. Compared to native tissue, decellularized porcine dermis (DP) exhibited a remarkable decline of approximately 90 % in DNA content relative to the native tissue, as confirmed by the lack of nuclear staining observed through 4′,6-diamidino-2-phenylindole (DAPI) staining. Furthermore, histological analysis confirmed the presence of retained ECM components in the DP, and ECM components were quantified. Optimal concentrations of the dECM hydrogel (2, 4, and 6 mg/mL) for UC-MSCs cultivation were determined, and it was observed that a concentration of 2 mg/mL promoted better proliferation of UC-MSCs. The microstructure and mechanical strength of different dECM hydrogel concentrations were analyzed using scanning electron microscope (SEM) and rheometer. Both single UC-MSCs and spheroids in a 2 mg/mL ECM hydrogel were transplanted into mouse skin wound model to assess their effectiveness in promoting skin regeneration. It was confirmed that collagen and angiogenesis involved in skin regeneration were significantly (p < 0.05) increased in the ECM hydrogel with single UC-MSCs group, compared to spheroids MSCs. Therefore, these findings propose a promising therapeutic strategy for skin wound regeneration and recovery.</div></div>","PeriodicalId":383,"journal":{"name":"Materials & Design","volume":"251 ","pages":"Article 113712"},"PeriodicalIF":7.6,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143419781","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Surface smoothing for laser powder-bed Ti-6Al-4V by a transient liquid phase

IF 7.6 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials & Design

Pub Date : 2025-02-10 DOI: 10.1016/j.matdes.2025.113689

Kendall J. Yetter , Kyle Jung , Andrew Chuang , Michael D. Sangid , William LePage

Surface roughness is the primary driver of fatigue for additively manufactured metals. To address surface roughness, this work introduces a new method to smooth features beyond line-of-sight without material removal. The method applies a coating that triggers local surface remelting by activating a eutectic reaction during heat treatment. The associated liquid phase then wets and isothermally solidifies into a smoother surface. For Ti-6Al-4V fabricated with laser powder bed fusion, samples with and without TLP smoothing (using a Cu coating) were characterized with a suite of techniques, including mechanical testing, electron backscatter diffraction, synchrotron X-ray tomography, and fractography. TLP smoothing reduced surface roughness by 80% and amplified compressive residual stress at the surface by about 50%. With statistically equivalent virtual microstructures, crystal plasticity scrutinized the roles of phases, porosity, and surface roughness. Although the tensile strain-to-failure was reduced to 1% strain, the TLP smoothing process increased high-cycle fatigue strength by about 20% compared to control samples, pointing to future opportunities to optimize the new process through various coating compositions and heat treatment schedules. Overall, this work establishes a new paradigm for treating surfaces of materials for smoothness and compressive residual stress.

{"title":"Surface smoothing for laser powder-bed Ti-6Al-4V by a transient liquid phase","authors":"Kendall J. Yetter , Kyle Jung , Andrew Chuang , Michael D. Sangid , William LePage","doi":"10.1016/j.matdes.2025.113689","DOIUrl":"10.1016/j.matdes.2025.113689","url":null,"abstract":"<div><div>Surface roughness is the primary driver of fatigue for additively manufactured metals. To address surface roughness, this work introduces a new method to smooth features beyond line-of-sight without material removal. The method applies a coating that triggers local surface remelting by activating a eutectic reaction during heat treatment. The associated liquid phase then wets and isothermally solidifies into a smoother surface. For Ti-6Al-4V fabricated with laser powder bed fusion, samples with and without TLP smoothing (using a Cu coating) were characterized with a suite of techniques, including mechanical testing, electron backscatter diffraction, synchrotron X-ray tomography, and fractography. TLP smoothing reduced surface roughness by 80% and amplified compressive residual stress at the surface by about 50%. With statistically equivalent virtual microstructures, crystal plasticity scrutinized the roles of phases, porosity, and surface roughness. Although the tensile strain-to-failure was reduced to 1% strain, the TLP smoothing process increased high-cycle fatigue strength by about 20% compared to control samples, pointing to future opportunities to optimize the new process through various coating compositions and heat treatment schedules. Overall, this work establishes a new paradigm for treating surfaces of materials for smoothness and compressive residual stress.</div></div>","PeriodicalId":383,"journal":{"name":"Materials & Design","volume":"251 ","pages":"Article 113689"},"PeriodicalIF":7.6,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143419765","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhanced solid solution hardening by off-center substitutional solute atoms in α-Ti

IF 7.6 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials & Design

Pub Date : 2025-02-10 DOI: 10.1016/j.matdes.2025.113709

Zi-Han Yu , Shuo Cao , Rui Yang , Qing-Miao Hu

Most recently, some substitutional solute atoms in α-Ti have been predicted to occupy unexpectedly the low-symmetry (LS) positions away from the high-symmetry (HS) lattice site, which was speculated to result in enhanced solid solution hardening (SSH). In the present work, the SSH induced by the LS off-center solute atom is evaluated within the framework of continuum elasticity theory, in comparison with that induced by its HS lattice-site counterpart. The interaction energy and force between the solute atom and the basal/prismatic edge/screw 〈a〉 dislocations in α-Ti solid solution are calculated with the elastic dipole model, with which the strength increments induced by the solute atoms are evaluated with the Labusch model. We show that, in general, the LS solute atom interacts much more strongly with the dislocations than its HS counterpart does. The calculated interaction energies suggest that the LS solute atom forms atmosphere above/below the slip plane of the basal 〈a〉 dislocations but on the slip plane of the prismatic 〈a〉 dislocations regardless of the dislocation types (edge or screw). The strength increments caused by most of the LS solute atoms are more than an order of magnitude higher than those by their HS counterparts. The SSH effect induced by the LS solute atom is mainly determined by the strength of the Jahn-Teller splitting of the

d

-orbitals of the solute atom, dissimilar to that induced by HS solute atom where the atomic size mismatch dominates.

{"title":"Enhanced solid solution hardening by off-center substitutional solute atoms in α-Ti","authors":"Zi-Han Yu , Shuo Cao , Rui Yang , Qing-Miao Hu","doi":"10.1016/j.matdes.2025.113709","DOIUrl":"10.1016/j.matdes.2025.113709","url":null,"abstract":"<div><div>Most recently, some substitutional solute atoms in α-Ti have been predicted to occupy unexpectedly the low-symmetry (LS) positions away from the high-symmetry (HS) lattice site, which was speculated to result in enhanced solid solution hardening (SSH). In the present work, the SSH induced by the LS off-center solute atom is evaluated within the framework of continuum elasticity theory, in comparison with that induced by its HS lattice-site counterpart. The interaction energy and force between the solute atom and the basal/prismatic edge/screw 〈a〉 dislocations in α-Ti solid solution are calculated with the elastic dipole model, with which the strength increments induced by the solute atoms are evaluated with the Labusch model. We show that, in general, the LS solute atom interacts much more strongly with the dislocations than its HS counterpart does. The calculated interaction energies suggest that the LS solute atom forms atmosphere above/below the slip plane of the basal 〈a〉 dislocations but on the slip plane of the prismatic 〈a〉 dislocations regardless of the dislocation types (edge or screw). The strength increments caused by most of the LS solute atoms are more than an order of magnitude higher than those by their HS counterparts. The SSH effect induced by the LS solute atom is mainly determined by the strength of the Jahn-Teller splitting of the <span><math><mrow><mi>d</mi></mrow></math></span>-orbitals of the solute atom, dissimilar to that induced by HS solute atom where the atomic size mismatch dominates.</div></div>","PeriodicalId":383,"journal":{"name":"Materials & Design","volume":"251 ","pages":"Article 113709"},"PeriodicalIF":7.6,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143419764","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mechanical characterization of an origami-inspired super deformable metamaterial with high tunability for tissue engineering

IF 7.6 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials & Design

Pub Date : 2025-02-08 DOI: 10.1016/j.matdes.2025.113701

M.A. Bagheri , C.E. Aubin , M.L. Nault , I. Villemure

Origami-inspired metamaterials have gained significant attention for their ability to mimic the complex mechanical behavior of biological tissues and their potential applications in advanced surgical treatments. Inspired by Kresling origami, we introduced a metamaterial capable of large recoverable deformations. A parametric design explored the effects of changing geometrical parameters on the mechanical properties of the metamaterial. Eighteen designs were fabricated and mechanically tested for practicability assessment and validation purposes. Non-linear finite element method was leveraged to test the entire design space of the metamaterial. Using Bayesian machine learning, the sensitivity of surface to volume ratio, porosity, elastic modulus, strain energy density, and maximum local strain to the design inputs was assessed and their corresponding predictive models were created. The fabricated designs could withstand 80 % and up to 70 % recoverable strain in quasi static and cyclic loading, respectively, while exhibiting a wide range of structural and mechanical properties. From predictive models, elastic modulus of 0.1 Pa to 1.8 KPa was attainable, while having porosities from 49.7 % to 99.9 %. This study demonstrated the feasibility of the design and manufacturing of an origami-inspired super deformable metamaterial with highly-tunable structural and mechanical properties, which can be used for various tissue engineering applications.

{"title":"Mechanical characterization of an origami-inspired super deformable metamaterial with high tunability for tissue engineering","authors":"M.A. Bagheri , C.E. Aubin , M.L. Nault , I. Villemure","doi":"10.1016/j.matdes.2025.113701","DOIUrl":"10.1016/j.matdes.2025.113701","url":null,"abstract":"<div><div>Origami-inspired metamaterials have gained significant attention for their ability to mimic the complex mechanical behavior of biological tissues and their potential applications in advanced surgical treatments. Inspired by Kresling origami, we introduced a metamaterial capable of large recoverable deformations. A parametric design explored the effects of changing geometrical parameters on the mechanical properties of the metamaterial. Eighteen designs were fabricated and mechanically tested for practicability assessment and validation purposes. Non-linear finite element method was leveraged to test the entire design space of the metamaterial. Using Bayesian machine learning, the sensitivity of surface to volume ratio, porosity, elastic modulus, strain energy density, and maximum local strain to the design inputs was assessed and their corresponding predictive models were created. The fabricated designs could withstand 80 % and up to 70 % recoverable strain in quasi static and cyclic loading, respectively, while exhibiting a wide range of structural and mechanical properties. From predictive models, elastic modulus of 0.1 Pa to 1.8 KPa was attainable, while having porosities from 49.7 % to 99.9 %. This study demonstrated the feasibility of the design and manufacturing of an origami-inspired super deformable metamaterial with highly-tunable structural and mechanical properties, which can be used for various tissue engineering applications.</div></div>","PeriodicalId":383,"journal":{"name":"Materials & Design","volume":"251 ","pages":"Article 113701"},"PeriodicalIF":7.6,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143419763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Stealth dicing strategy for fabricating the cleavage mirror facets of semiconductor laser

IF 7.6 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials & Design

Pub Date : 2025-02-08 DOI: 10.1016/j.matdes.2025.113695

Menglai Lei , Linghai Meng , Yucheng Lin , Yujing Deng , Huanqing Chen , Lei Liu , Jianbo Fu , Shengxiang Jiang , Hua Zong , Xiaodong Hu

We investigated the formation of cavity mirror facets of GaN-based laser diodes (LDs) using laser stealth dicing (SD) approach in skip-and-scribing mode and compared it with traditional diamond-tip edge-scribing method. As a result, high-quality LD cavity mirrors and non-degradative lasing properties were achieved with the SD scribe and cleavage method. The morphology measurement confirmed that the laser SD scribing effectively inhibited the formation of cavity mirror terrace-like structures, which usually appeared in traditional scribing methods, resulting in uniform and consistent cleavage bars. In a comparison experiment, A 1000-h burn-in test at 100 mA@40 °C was applied to TO56 packaged LDs to evaluate the effect of the new method on device performance. The results showed that the degradation rate of power in SD LDs is 7 % on average after aging. The average lifetime of SD LDs was 8083 h estimated by 1000-h of burn-in test, demonstrating the same stability and lifetime as the diamond-scribing LDs. The application of the novel laser SD scribe and cleavage solution in large-scale LD production was significant for improving yield and reducing cost.

{"title":"Stealth dicing strategy for fabricating the cleavage mirror facets of semiconductor laser","authors":"Menglai Lei , Linghai Meng , Yucheng Lin , Yujing Deng , Huanqing Chen , Lei Liu , Jianbo Fu , Shengxiang Jiang , Hua Zong , Xiaodong Hu","doi":"10.1016/j.matdes.2025.113695","DOIUrl":"10.1016/j.matdes.2025.113695","url":null,"abstract":"<div><div>We investigated the formation of cavity mirror facets of GaN-based laser diodes (LDs) using laser stealth dicing (SD) approach in skip-and-scribing mode and compared it with traditional diamond-tip edge-scribing method. As a result, high-quality LD cavity mirrors and non-degradative lasing properties were achieved with the SD scribe and cleavage method. The morphology measurement confirmed that the laser SD scribing effectively inhibited the formation of cavity mirror terrace-like structures, which usually appeared in traditional scribing methods, resulting in uniform and consistent cleavage bars. In a comparison experiment, A 1000-h burn-in test at 100 mA@40 °C was applied to TO56 packaged LDs to evaluate the effect of the new method on device performance. The results showed that the degradation rate of power in SD LDs is 7 % on average after aging. The average lifetime of SD LDs was 8083 h estimated by 1000-h of burn-in test, demonstrating the same stability and lifetime as the diamond-scribing LDs. The application of the novel laser SD scribe and cleavage solution in large-scale LD production was significant for improving yield and reducing cost.</div></div>","PeriodicalId":383,"journal":{"name":"Materials & Design","volume":"251 ","pages":"Article 113695"},"PeriodicalIF":7.6,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143386453","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The effects of tungsten content on the mechanical behavior, ignition and energy-release characteristics of short-tungsten-fibers/Zr-BMGCs under dynamic loading

IF 7.6 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials & Design

Pub Date : 2025-02-08 DOI: 10.1016/j.matdes.2025.113703

Xin Yu, Jianbin Li, Xiqiang Gai, Chong Chen, Zhenxiong Wang, Xin Zhao, Hongwei Zhao, Kaichuang Zhang

The short tungsten fibers/Zr-based bulk metallic glass composites (SWF/Zr-BMGCs) were prepared by melt infiltration casting. The effects of tungsten content on mechanical properties and energy-release characteristics under dynamic loading of Zr_59.62Cu_14.4Ni₁₂Al₁₀Nb₃Hf_0.78Y_0.2 bulk metallic glasses (Zr-BMGs) were systematically investigated. Increasing tungsten content enhanced the mechanical strength of SWF/Zr-BMGCs from 1543 MPa to 1984 MPa by inhibiting propagation of shear bands, and ballistic gun tests demonstrated that tungsten fibers significantly improved the penetration capability of SWF/BMGC fragments. However, analysis of binarized images and quasi-closed chamber overpressure data indicated that the flare area and peak overpressure are reduced at the same impact velocity of 1000 m/s, reflecting a lower energy density per unit mass and reaction efficiency of 435.5 J/g and 4.14 % for SWF/Zr-BMGCs compared to 1592.1 J/g and 15.12 % of Zr-BMGs. This primarily results from the reduced exposed oxidation area during impact due to larger fragmented sizes and interfacial adhesion effects. In addition, the active elements Zr, Al, and Ni could burn preferentially under impact, which in turn contributes to the oxidation of elements Cu and W with high melting points. This work could improve the understanding of energy-release behavior of ex-situ second-phase reinforced Zr-BMGs under impact and support their further application.

{"title":"The effects of tungsten content on the mechanical behavior, ignition and energy-release characteristics of short-tungsten-fibers/Zr-BMGCs under dynamic loading","authors":"Xin Yu, Jianbin Li, Xiqiang Gai, Chong Chen, Zhenxiong Wang, Xin Zhao, Hongwei Zhao, Kaichuang Zhang","doi":"10.1016/j.matdes.2025.113703","DOIUrl":"10.1016/j.matdes.2025.113703","url":null,"abstract":"<div><div>The short tungsten fibers/Zr-based bulk metallic glass composites (SWF/Zr-BMGCs) were prepared by melt infiltration casting. The effects of tungsten content on mechanical properties and energy-release characteristics under dynamic loading of Zr<sub>59.62</sub>Cu<sub>14.4</sub>Ni<sub>12</sub>Al<sub>10</sub>Nb<sub>3</sub>Hf<sub>0.78</sub>Y<sub>0.2</sub> bulk metallic glasses (Zr-BMGs) were systematically investigated. Increasing tungsten content enhanced the mechanical strength of SWF/Zr-BMGCs from 1543 MPa to 1984 MPa by inhibiting propagation of shear bands, and ballistic gun tests demonstrated that tungsten fibers significantly improved the penetration capability of SWF/BMGC fragments. However, analysis of binarized images and quasi-closed chamber overpressure data indicated that the flare area and peak overpressure are reduced at the same impact velocity of 1000 m/s, reflecting a lower energy density per unit mass and reaction efficiency of 435.5 J/g and 4.14 % for SWF/Zr-BMGCs compared to 1592.1 J/g and 15.12 % of Zr-BMGs. This primarily results from the reduced exposed oxidation area during impact due to larger fragmented sizes and interfacial adhesion effects. In addition, the active elements Zr, Al, and Ni could burn preferentially under impact, which in turn contributes to the oxidation of elements Cu and W with high melting points. This work could improve the understanding of energy-release behavior of ex-situ second-phase reinforced Zr-BMGs under impact and support their further application.</div></div>","PeriodicalId":383,"journal":{"name":"Materials & Design","volume":"251 ","pages":"Article 113703"},"PeriodicalIF":7.6,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143378620","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthesis of high-performance CdS/MnO composite electrode to achieve high energy and power densities for asymmetrical supercapacitors

IF 7.6 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials & Design

Pub Date : 2025-02-07 DOI: 10.1016/j.matdes.2025.113704

Muhammad Arif , Junaid Riaz , Hongran Yang , Zhaoming Fu , Amina Bibi , Ting Zhu

Developing electrode materials with exceptional durability, energy density, and rate performance is very interesting for next-generation supercapacitor applications. This work used a simple wet chemical method to synthesize a cost-effective composite electrode based on CdS and MnO to achieve high energy and power densities of asymmetric supercapacitors (ASCs). The composite shows excellent conductivity, a large specific surface area, and high cycling stability. It exhibits remarkable rate capability by achieving a specific capacitance of 1020 F/g at 1 A g⁻¹ and maintaining 90.3% capacitance after 5000 cycles at 10 A/g. Integrated into a CdS-MnO||AC ASC, the device exhibits outstanding overall energy and power capabilities by delivering a high energy density and maintaining a stable performance at high power densities. The components’ synergistic interaction significantly improves the supercapacitor’s performance, providing a capable method for enhancing energy storage systems.

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Discrete slip plane analysis of ferrite microtensile tests: Influence of dislocation source distribution and non-Schmid effects on slip system activity

IF 7.6 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials & Design

Pub Date : 2025-02-07 DOI: 10.1016/j.matdes.2025.113698

J. Wijnen, J.P.M. Hoefnagels, M.G.D. Geers, R.H.J. Peerlings

The slip system activity in microtensile tests of ferrite single crystals is compared with predictions made by the discrete slip plane model proposed by Wijnen et al. (2021) [24]. This is an extension of conventional crystal plasticity in which the stochastics and physics of dislocation sources are taken into account in a discrete slip band. It results in discrete slip traces and non-deterministic mechanical behavior, similar to what is observed in experiments. A detailed analysis of which slip systems are presumed to be active in experiments is performed. Non-Schmid effects are incorporated by extending a non-Schmid framework commonly used to model {110} slip to {112} planes. The slip activity in the simulations is compared to that in the tests. Conventional crystal plasticity fails to predict the diversity in active slip systems that is observed experimentally. The slip activity obtained with the discrete slip plane model is in much better agreement with the experiments. Including non-Schmid effects only entails minor differences. This suggests that stochastic effects dominate the behavior of ferrite crystals with dimensions in the order of a few micrometers and that non-Schmid effects may not play a large role.

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