Materials & Design最新文献_第8页

Ultralight Pt-ALD-modified graphene aerogel achieving aluminum-class thermal resistance at 12% mass 超轻pt - ald修饰的石墨烯气凝胶在12%质量下实现铝级热阻

IF 7.9 2区材料科学

Materials & Design Pub Date : 2025-09-11 DOI: 10.1016/j.matdes.2025.114742

Jiho Kang , Viet Phuong Nguyen , Seung-Mo Lee , Duckjong Kim

{"title":"Ultralight Pt-ALD-modified graphene aerogel achieving aluminum-class thermal resistance at 12% mass","authors":"Jiho Kang , Viet Phuong Nguyen , Seung-Mo Lee , Duckjong Kim","doi":"10.1016/j.matdes.2025.114742","DOIUrl":"10.1016/j.matdes.2025.114742","url":null,"abstract":"<div><div>Graphene aerogels (GAs), a class of three-dimensional porous structures, are limited by a fundamental challenge: low thermal conductivity stemming from high interfacial resistance between constituent layers and structural defects. This study systematically investigates a strategy to enhance thermal transport properties by engineering the interlayer bonding via platinum atomic layer deposition (Pt-ALD) and compares it with conventional high-temperature annealing (1873 K). The Pt-ALD-modified graphene aerogel (GA-ALD) exhibited a 199 % increase in thermal conductivity, significantly surpassing the 113 % enhancement from heat treatment. SEM, Raman, XRD, XPS, and FTIR data explicitly indicate that Pt-ALD forms covalent Pt<img>O<img>C bonds that bridge adjacent graphene layers while preserving the original porous morphology. Owing to the synergistic effect of enhanced solid-phase thermal conductivity and efficient convective heat transfer through the preserved porous structure, the GA-ALD sample achieved a total thermal resistance comparable to that of an equal-sized aluminum heat sink under identical forced-convection conditions, while weighing only ∼12 % of its aluminum counterpart. Moreover, cyclic compressive tests confirmed GA-ALD durability, retaining 99.5 % height and 94.7 % stress after 1000 cycles. These findings demonstrate that interfacial bond engineering via ALD is a powerful route to ultralight, high-performance carbon aerogels for weight-sensitive thermal-management applications.</div></div>","PeriodicalId":383,"journal":{"name":"Materials & Design","volume":"259 ","pages":"Article 114742"},"PeriodicalIF":7.9,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145107788","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Laser powder bed fusion of a novel CoNi-based high entropy superalloy 一种新型coni基高熵高温合金的激光粉末床熔合

IF 7.9 2区材料科学

Materials & Design Pub Date : 2025-09-10 DOI: 10.1016/j.matdes.2025.114741

Alessandro De Nardi , Ahad Mohammadzadeh , Amir Mostafaei , Jose Manuel Torralba

{"title":"Laser powder bed fusion of a novel CoNi-based high entropy superalloy","authors":"Alessandro De Nardi , Ahad Mohammadzadeh , Amir Mostafaei , Jose Manuel Torralba","doi":"10.1016/j.matdes.2025.114741","DOIUrl":"10.1016/j.matdes.2025.114741","url":null,"abstract":"<div><div>Laser powder bed fusion (L-PBF) is poised to revolutionize the manufacturing of high-value metallic materials, allowing for intricate, geometrically complex designs while minimizing material waste. The primary challenge lies in formulating alloys compatible with L-PBF that also maintain properties suitable for the demanding conditions encountered in energy, space, and nuclear applications. We introduce a category of high strength, defect-resistant octonary CoNi-based high entropy superalloy (CoNi-HESA), comprising roughly equal parts of Co and Ni, along with Cr, Al, V, Ti, Ta, and W. This alloy exhibits as-printed tensile strength exceeding 1 GPa and tensile ductility exceeding 30 % at room temperature. Furthermore, compression tests demonstrate that the as-printed parts maintain a yield strength of about 1 GPa at room temperature up to 700 °C, which decreases to 0.9 GPa and 0.7 GPa as the test temperature reaches 800 °C and 900 °C, respectively. With a careful combination of laser powder and scan speed, the developed HESA is well-suited for crack-resistant, high-density component production through L-PBF. Alloy design principles are elucidated through CALPHAD calculations based on the high entropy alloy (HEA) database, including the structure and properties of L-PBF processed CoNi-HESA.</div></div>","PeriodicalId":383,"journal":{"name":"Materials & Design","volume":"259 ","pages":"Article 114741"},"PeriodicalIF":7.9,"publicationDate":"2025-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145107791","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","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 particle size on powder velocity distribution at the nozzle outlet in Directed Energy Deposition 定向能沉积中粒径对喷嘴出口粉末速度分布的影响

IF 7.9 2区材料科学

Materials & Design Pub Date : 2025-09-10 DOI: 10.1016/j.matdes.2025.114680

Tijan Mede , Andrej Jeromen , Edvard Govekar , Michael Mallon , Matjaž Godec

{"title":"Influence of particle size on powder velocity distribution at the nozzle outlet in Directed Energy Deposition","authors":"Tijan Mede , Andrej Jeromen , Edvard Govekar , Michael Mallon , Matjaž Godec","doi":"10.1016/j.matdes.2025.114680","DOIUrl":"10.1016/j.matdes.2025.114680","url":null,"abstract":"<div><div>Metal-based Directed Energy Deposition (DED) is considered one of the variations of additive manufacturing with the highest potential, particularly for space industry and in-orbital manufacturing. The technology however still faces various challenges, many of which can be traced back to poor control and understanding of the powder delivery. Velocity distribution of powder particles at the DED nozzle outlet has a key influence on the results of any predictive model of powder stream and yet remains largely disputed. Certain numerical studies highlighted a possible influence of powder particle size on the velocity condition at the nozzle exit, yet no experimental studies confirmed this effect. The experimental campaign described in this paper quantifies this relation between powder particle size and velocity distribution at the nozzle outlet and a strong decrease of particle speed with particle size is observed. Moreover, smaller particles are observed to travel at speeds higher than the mean carrier gas speed suggesting powder particle segregation within the nozzle as one of the mechanisms driving speed differences at the nozzle outlet.</div></div>","PeriodicalId":383,"journal":{"name":"Materials & Design","volume":"259 ","pages":"Article 114680"},"PeriodicalIF":7.9,"publicationDate":"2025-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145107793","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Water-Responsive hydroplastic 4D printing with programmable shape morphing and locking 具有可编程形状变形和锁定的水响应水塑4D打印

IF 7.9 2区材料科学

Materials & Design Pub Date : 2025-09-08 DOI: 10.1016/j.matdes.2025.114688

Sun Hye Yoon , Seo Rim Park , Myung Seo Kim , Kwang Min Lee , Seong Hyeon Park , Seok Kim , Young Tae Cho

{"title":"Water-Responsive hydroplastic 4D printing with programmable shape morphing and locking","authors":"Sun Hye Yoon , Seo Rim Park , Myung Seo Kim , Kwang Min Lee , Seong Hyeon Park , Seok Kim , Young Tae Cho","doi":"10.1016/j.matdes.2025.114688","DOIUrl":"10.1016/j.matdes.2025.114688","url":null,"abstract":"<div><div>Hydroplastic materials undergo reversible mechanical changes upon water absorption, transitioning between soft and rigid states. Leveraging this characteristic promotes environmentally friendly shape-morphing technologies, recently attracting significant research interest. This study aims to develop a method for inducing non-uniform curing along the thickness of a hydroplastic photocurable resin by applying frontal photopolymerization (FPP) using a commercial projector, and for achieving shape-morphing behavior through water absorption. The 3D-printed structures deform according to a predefined design, soften upon water absorption, and harden upon drying while retaining a stable deformed shape. Materials that deform in response to water or humidity are typically ductile, making it difficult to maintain their deformed shape after stimulus removal. However, this study demonstrates that a single material can programmable self-assembly while retaining its deformed shape even after water removal. This hydroplastic shape-morphing structure can be used for fabricating microfluidic channels on glass surfaces, which are difficult to process.</div></div>","PeriodicalId":383,"journal":{"name":"Materials & Design","volume":"259 ","pages":"Article 114688"},"PeriodicalIF":7.9,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145119506","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Achieving high oxygen tolerance in Ti6Al4V: Copper-oxygen co-doping strategy for ultrahigh strength-ductility balance 在Ti6Al4V：铜氧共掺杂策略中实现超高强度-塑性平衡的高氧耐受性

IF 7.9 2区材料科学

Materials & Design Pub Date : 2025-09-08 DOI: 10.1016/j.matdes.2025.114719

Hongqiang Duan , Hongmei Zhang , Xingwang Cheng , Xiaonan Mu , Qunbo Fan , Ying Zhang , Ni Xiong , Ke Feng , Yu Wang , Xuexia Li , Taotao Cai , Kefan Zheng

{"title":"Achieving high oxygen tolerance in Ti6Al4V: Copper-oxygen co-doping strategy for ultrahigh strength-ductility balance","authors":"Hongqiang Duan , Hongmei Zhang , Xingwang Cheng , Xiaonan Mu , Qunbo Fan , Ying Zhang , Ni Xiong , Ke Feng , Yu Wang , Xuexia Li , Taotao Cai , Kefan Zheng","doi":"10.1016/j.matdes.2025.114719","DOIUrl":"10.1016/j.matdes.2025.114719","url":null,"abstract":"<div><div>Conventional α + β Ti6Al4V alloys lack sufficient strengthening mechanisms, limiting strength. While oxygen (O) offers a cost-effective strengthening route, exceeding ∼ 0.33 wt% causes significant embrittlement. Here, we explored how to efficiently utilize interstitial oxygen to enhance the mechanical properties ofTi6Al4V. The copper oxide (CuO) was innovatively employed as a precursor to completely dissolve into Ti6Al4V matrix, interstitial O and substitutional Cu atoms were simultaneously utilized to strengthen the primary α-phase (α<sub>p</sub>) while inducing the abundant secondary-α (α<sub>s</sub>) nanoprecipitates. Surprisingly, the introduction of Cu element facilitated control of lattice distortion and redistributed oxygen between α<sub>p</sub> and β-transformed (β<sub>trans</sub>) structure, resulting in the Ti6Al4V-2.5CuO (wt.%) alloy with high oxygen tolerance (0.62 wt%) and an ultra-high ultimate strength of ∼ 1635 MPa and a favorable ductility of ∼ 5.3 %. The dual effect of interstitial solid solution strengthening and α<sub>s</sub> precipitation strengthening were achieved under the Cu/O interaction. Additionally, the addition of Cu promoted the oxygen redistribution and activation of the basal < <strong>a</strong> > and pyramidal < <strong>c</strong> + <strong>a</strong> > slip systems, thereby ensuring improved ductility. This study presented a novel strategy for high-strength Ti alloys using interstitial oxygen, maximizing strengthening while mitigating embrittlement.</div></div>","PeriodicalId":383,"journal":{"name":"Materials & Design","volume":"259 ","pages":"Article 114719"},"PeriodicalIF":7.9,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145061507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Crack deflection by design – Utilizing the material inhomogeneity effect on miniaturized additively manufactured structures 设计中的裂纹挠度——利用材料不均匀性效应对微型化增材制造结构的影响

IF 7.9 2区材料科学

Materials & Design Pub Date : 2025-09-08 DOI: 10.1016/j.matdes.2025.114718

Alexander Jelinek , Markus Alfreider , Dražen Breščaković , Otmar Kolednik , Daniel Kiener

{"title":"Crack deflection by design – Utilizing the material inhomogeneity effect on miniaturized additively manufactured structures","authors":"Alexander Jelinek , Markus Alfreider , Dražen Breščaković , Otmar Kolednik , Daniel Kiener","doi":"10.1016/j.matdes.2025.114718","DOIUrl":"10.1016/j.matdes.2025.114718","url":null,"abstract":"<div><div>A natural crack exhibits a surrounding stress field, which may overlap considerably with a stress field caused by any material inhomogeneity, influencing the crack driving force and extension direction. To utilize this effect for potentially increasing the apparent toughness, a defined pore is introduced near a potential crack path, whereby upon interaction, the crack tip can be deflected or trapped, depending on the intermediate distance. Since fundamental mechanics is well-known, a miniaturized notched bending specimen geometry incorporating a pore was selected to investigate the application potential for parts manufactured via multi-photon lithography. The size regime is representative of the smallest available objects and requires <em>in situ</em> SEM testing, which was completed with finite element modeling based on crack path prediction through analyzing the local crack driving force. The high dimensional repeatability of the process allowed for testing reliably reproduced specimens with variation of crack to pore distance only. The prediction represented the actual crack paths well, underlining successfully facilitated crack path alteration. The toughness was mainly increased by crack trapping within the pore, where deflection had a quantitatively negligible effect.</div></div>","PeriodicalId":383,"journal":{"name":"Materials & Design","volume":"259 ","pages":"Article 114718"},"PeriodicalIF":7.9,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145107860","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Beyond diameters: Decoding fabrication patterns of hierarchical micro-nano titanium implants via anodization and their geometries on region-specific soft-tissue integration 超越直径：通过阳极氧化解码分层微纳米钛植入物的制造模式及其对特定区域软组织整合的几何形状

IF 7.9 2区材料科学

Materials & Design Pub Date : 2025-09-06 DOI: 10.1016/j.matdes.2025.114691

Tianqi Guo , Miaoxuan Dai , Xinxin Ding, Xiaomeng Zhang, Yingxin Gu, Hongchang Lai

{"title":"Beyond diameters: Decoding fabrication patterns of hierarchical micro-nano titanium implants via anodization and their geometries on region-specific soft-tissue integration","authors":"Tianqi Guo , Miaoxuan Dai , Xinxin Ding, Xiaomeng Zhang, Yingxin Gu, Hongchang Lai","doi":"10.1016/j.matdes.2025.114691","DOIUrl":"10.1016/j.matdes.2025.114691","url":null,"abstract":"<div><div>Electrochemical anodization creates titania nanopores (TNPs) on Ti implants with distinctive micro-nano geometries to enhance their surface bioactivity, showing the potential to improve soft-tissue integration at varied transmucosal regions. However, understanding how topography regulates TNP dimensions under voltage, and the clinical feasibility of diverse TNP geometries was limited. More crucially, existing research predominantly focused on nanopore diameter, neglecting other geometric characteristics (alignment, texture/roughness) on soft-tissue cells that impeded optimized TNPs design for ideal soft-tissue integration. This study showed nanopore dimensions were voltage-dependent on micro-patterned Ti but remain stable on smooth counterparts. Varied TNPs with similar diameters but different alignment/roughness were selected and identified with similar chemistry/hydrophilicity, but their protein adhesion and stability were length-dependent, showing their feasibility as implant devices. Finally, human gingival fibroblasts (HGFs) and HaCaT epithelial cells functions on varied selected TNPs reflected that nanopores inherently promoted cell responses, but hybrid microgroove-nanopores dramatically enhanced HGF’s collagen and fibronectin secretion, while irregular textured nanopores significantly improved HaCaT adhesion. By addressing the gaps in understanding topographical regulation and the influence of overlooked geometric features beyond diameter, this work advances spatially optimized implant designs for improved epithelial sealing and connective tissue integration at different transmucosal zones for improved implant health.</div></div>","PeriodicalId":383,"journal":{"name":"Materials & Design","volume":"259 ","pages":"Article 114691"},"PeriodicalIF":7.9,"publicationDate":"2025-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145107863","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Damping properties of single-material and bi-material lattice structures 单材料和双材料晶格结构的阻尼特性

IF 7.9 2区材料科学

Materials & Design Pub Date : 2025-09-06 DOI: 10.1016/j.matdes.2025.114710

Haotian Wang, Bin Niu, Rui Yang

引用次数: 0

Comprehensive review of fabrication process parameters influencing defect formation in laser powder bed fused (L-PBF) Al-Si alloys 影响激光粉末床熔合Al-Si合金缺陷形成的工艺参数综述

IF 7.9 2区材料科学

Materials & Design Pub Date : 2025-09-01 DOI: 10.1016/j.matdes.2025.114374

Md Mehide Hasan Tusher, Ayhan Ince

{"title":"Comprehensive review of fabrication process parameters influencing defect formation in laser powder bed fused (L-PBF) Al-Si alloys","authors":"Md Mehide Hasan Tusher, Ayhan Ince","doi":"10.1016/j.matdes.2025.114374","DOIUrl":"10.1016/j.matdes.2025.114374","url":null,"abstract":"<div><div>Recently, Laser Powder Bed Fusion (L-PBF) has garnered considerable interest for its ability to fabricate highly precise and intricate Al-Si alloy components. Its versatility in design makes it particularly appealing for industries such as aerospace and automotive, where lightweight structures are critical. However, the L-PBF process induces defects in the resulting components, such as solidification cracks, porosity, anisotropy, and uneven surfaces, which compromise structural integrity and dimensional accuracy. As a result, significant effort has been devoted to understanding how fabrication parameters influence defect formation in L-PBF Al-Si parts. Despite extensive research on laser material processing, a comprehensive understanding of how specific process parameters affect defect formation remains limited. This knowledge is crucial for optimizing the performance of L-PBF Al-Si components. This article aims to provide a systematic examination of the causes of defects in L-PBF Al-Si components and their relationship with fabrication factors and process parameters. Additionally, it offers insights into addressing these challenges and highlights future research directions to mitigate defects in L-PBF Al-Si components. Consequently, this work aims to further promote the development of L-PBF-manufactured Al-Si components and their widespread applications across diverse industries.</div></div>","PeriodicalId":383,"journal":{"name":"Materials & Design","volume":"257 ","pages":"Article 114374"},"PeriodicalIF":7.9,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144923002","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

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IF 7.9 2区材料科学

Materials & Design Pub Date : 2025-09-01 DOI: 10.1016/S0264-1275(25)01033-0

引用次数: 0