Bulletin of Materials Science最新文献_第5页

Experimental measurements of Ti–Sb binary phase diagram for half-Heusler thermoelectric alloys 半heusler热电合金Ti-Sb二元相图的实验测量

IF 2.1 4区材料科学

Bulletin of Materials Science Pub Date : 2025-06-02 DOI: 10.1007/s12034-025-03436-z

Y Zhang, D Chen, Y Zhao, C Xiong, Q Huang

{"title":"Experimental measurements of Ti–Sb binary phase diagram for half-Heusler thermoelectric alloys","authors":"Y Zhang, D Chen, Y Zhao, C Xiong, Q Huang","doi":"10.1007/s12034-025-03436-z","DOIUrl":"10.1007/s12034-025-03436-z","url":null,"abstract":"<div>The Ti–Sb binary system, a critical component of half-Heusler thermoelectric alloys, remains incompletely defined due to the significant difference in melting points between Sb (630°C) and Ti (1670°C). In this work, Ti–Sb diffusion couples were prepared using argon gas-protected seal welding to prevent Sb volatilization during long-term annealing. Seven groups of samples were annealed at temperatures ranging from 400–900°C for 14 days. Eight equilibrium phases—(αTi), (βTi), (Ti3Sb), Ti2Sb, Ti1.35Sb, TiSb, TiSb2 and (Sb)—were identified based on microstructural and compositional analyses using electron probe microanalysis (EPMA). The equilibrium conjugate compositions reveal that the solubility of Sb in the hexagonal close-packed (αTi) phase is 0.33 at.%, while it significantly increases to ~7 at.% in the body-centred cubic (βTi) phase at 850°C due to its structural transformation. The detected phases (Ti3Sb), Ti2Sb, Ti1.35Sb (or Ti11−xSb8−γ), TiSb and TiSb2 exhibit stoichiometric compositions. Notably, the (Ti3Sb) phase shows a low Sb content (~22.5 at.%) below 600°C but transitions to a higher Sb content (~25.5 at.%) above 700°C, a change attributed to its structural modification from cubic-(Ti3Sb) to tetragonal-(Ti3Sb). These findings provide critical insights into the phase equilibria and structural transformations in the Ti–Sb system, enhancing its understanding for thermoelectric applications.</div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":"48 2","pages":""},"PeriodicalIF":2.1,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145161039","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}

引用次数: 0

Dual-mode optical thermometry of Li2ZnGe3O8:Er3+/Yb3+ upconversion phosphors via fluorescence intensity ratio 利用荧光强度比对Li2ZnGe3O8:Er3+/Yb3+上转换荧光粉进行双模光学测温

IF 2.1 4区材料科学

Bulletin of Materials Science Pub Date : 2025-06-02 DOI: 10.1007/s12034-025-03432-3

Shengyi Liu, Shang Gao, Duan Gao, Xin Chen, Li Wang, Wenbin Song, Ying Zhu, Han Yin, Jun Tan

{"title":"Dual-mode optical thermometry of Li2ZnGe3O8:Er3+/Yb3+ upconversion phosphors via fluorescence intensity ratio","authors":"Shengyi Liu, Shang Gao, Duan Gao, Xin Chen, Li Wang, Wenbin Song, Ying Zhu, Han Yin, Jun Tan","doi":"10.1007/s12034-025-03432-3","DOIUrl":"10.1007/s12034-025-03432-3","url":null,"abstract":"<div>Li2ZnGe3O8:Er3+ and Li2ZnGe3O8:Er3+/Yb3+ phosphors were successfully synthesized via a high-temperature solid-state reaction method, and the upconversion luminescence properties and mechanisms of both Er3+-doped and Er3+/Yb3+ co-doped systems under 980 and 1550 nm excitation were systematically investigated. Additionally, the optical temperature sensing performance of the Li2ZnGe3O8:Er3+/Yb3+ phosphor was explored in detail. To enhance temperature sensitivity and self-calibration features, a dual-mode temperature sensing method was designed and implemented based on fluorescence intensity ratio from thermally coupled energy levels (TCELs) and non-thermally coupled energy levels (NTCELs). Experimental results show that in the TCELs mode, the maximum absolute sensitivity under 980 nm excitation is 0.003197 K–1 (462 K), and under 1550 nm excitation is 0.0028 K–1 (303 K); while in the NTCELs mode, the maximum absolute sensitivity under 980 nm excitation is 0.003059 K–1 (529 K), and under 1550 nm excitation is 0.0013 K–1 (303 K). These findings indicate that Li2ZnGe3O8:Er3+/Yb3+ phosphors exhibit excellent dual-mode optical temperature sensing potential under dual-excitation conditions.</div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":"48 2","pages":""},"PeriodicalIF":2.1,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145161040","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}

引用次数: 0

Improving microwave absorbing properties of epoxy resin with silane surface-modified copper oxide nanoparticles integration 硅烷表面修饰氧化铜纳米粒子集成改善环氧树脂的微波吸收性能

IF 2.1 4区材料科学

Bulletin of Materials Science Pub Date : 2025-06-02 DOI: 10.1007/s12034-025-03435-0

Youcef Amine Medjaouri, Oussama Mehelli, Achour Ales, Redouane Tahmi, Karim Benzaoui, Abdelmalek Habes, Mehdi Derradji

{"title":"Improving microwave absorbing properties of epoxy resin with silane surface-modified copper oxide nanoparticles integration","authors":"Youcef Amine Medjaouri, Oussama Mehelli, Achour Ales, Redouane Tahmi, Karim Benzaoui, Abdelmalek Habes, Mehdi Derradji","doi":"10.1007/s12034-025-03435-0","DOIUrl":"10.1007/s12034-025-03435-0","url":null,"abstract":"<div>The pursuit of nanomaterials with desirable properties including excellent reflection loss (RL), reduced thickness, wide bandwidth, facile fabrication process and low density has garnered significant attention. In this study, we explore the potential of new nanocomposite samples through the incorporation of copper oxide nanoparticles into epoxy resin matrices. The investigation further delves into the thermal, morphological and electrical characteristics of these samples. This study evaluates the electromagnetic properties of the composites, including permittivity (ε), permeability (μ), RL and shielding effectiveness. The microwave characterization and shielding effectiveness assessments were conducted across the X-band frequency range (8–12 GHz). The findings are promising where the epoxy/10% CuO composite exhibits strong absorption with a spectrum below −10 dB in the 8.5–9 GHz and 9.75–11.25 GHz ranges. Notably, the 20% CuO composite consistently achieves a spectrum below −10 dB across all frequencies, indicating a remarkable 90% absorption capability at varying thicknesses.</div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":"48 2","pages":""},"PeriodicalIF":2.1,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145161038","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}

引用次数: 0

Influence of nanoclay reinforcement on thermal and mechanical properties of high-density polyethylene and polypropylene blends 纳米粘土增强对高密度聚乙烯和聚丙烯共混物热力学性能的影响

IF 2.1 4区材料科学

Bulletin of Materials Science Pub Date : 2025-05-30 DOI: 10.1007/s12034-025-03433-2

K P JEEVAN, R KRISHNA PRASAD

{"title":"Influence of nanoclay reinforcement on thermal and mechanical properties of high-density polyethylene and polypropylene blends","authors":"K P JEEVAN, R KRISHNA PRASAD","doi":"10.1007/s12034-025-03433-2","DOIUrl":"10.1007/s12034-025-03433-2","url":null,"abstract":"<div>This study investigates the effect of nanoclay (NC) and alumina on improving the thermo-mechanical properties of high-density polyethylene (HDPE) and polypropylene (PP) blends, compatibilized with polyethylene-grafted maleic anhydride (pEMAH). The modulus of the sample containing 1.5% and 3% NC are 893 MPa and 786 MPa, respectively. The ratio of the modulus of composites to that of the matrix increase proportionally with an increase in the composition of NC for various micromechanical models studied. The fracture energy release rate for Run 1 and Run 2 start at 2.08 and 2.35 kJ m–2 before aging, and once aged, they increase to 6.17 and 5.82 kJ m–2. High heat on tensile samples leads to bonding in the polymer. The bonding makes a polymer firm, prevents bending and increases the tensile strength. The COMSOL models predict the tensile strength of simulated values at 27 MPa for the 1.5% NC-reinforced matrix, which is the same as the experimental tensile value. Maximum mass loss rates show an increasing trend, with heating rates for the samples containing NC. For instance, the polymer blend containing 1.5% NC has peak mass loss rates of 15% at 5°C, 26% at 10°C and 43% at 15°C as the temperature increases. Adding NC particles to the blend improves its temperature resistance. The activation energy found using Horowitz and Metzger plots for HDPE/PP is 113 kJ mol–1, which increases to 141 kJ mol–1 for the 1.5% NC blend.</div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":"48 2","pages":""},"PeriodicalIF":2.1,"publicationDate":"2025-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145171862","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}

引用次数: 0

Preparation and mechanical properties of Ni–P–Al2O3–SiO2 composite coatings by pulsed electrodeposition 脉冲电沉积Ni-P-Al2O3-SiO2复合镀层的制备及其力学性能

IF 1.9 4区材料科学

Bulletin of Materials Science Pub Date : 2025-05-26 DOI: 10.1007/s12034-025-03430-5

Liutong Xu, Yongfeng Li, Long Zheng

{"title":"Preparation and mechanical properties of Ni–P–Al2O3–SiO2 composite coatings by pulsed electrodeposition","authors":"Liutong Xu, Yongfeng Li, Long Zheng","doi":"10.1007/s12034-025-03430-5","DOIUrl":"10.1007/s12034-025-03430-5","url":null,"abstract":"<div>Ni–P-based composite coatings have been widely used in the field of surface protection of metal materials due to their excellent physical and chemical properties. This study selected hard Al2O3 and SiO2 nanoparticles as strengthening phases and uniformly doped them into the Ni–P matrix using pulsed electrodeposition technology. The surface quality and mechanical properties of the composite coating were improved by optimizing the duty cycle parameters, and the effect of duty cycle on the deposition behaviour of the composite coating was revealed. The microstructure, composition, wear resistance and elastoplasticity of the composite coatings were characterized by scanning electron microscope, energy dispersive spectrometer, X-ray diffraction analyzer and nano-indentation instrument. The research results indicate that the reduction of pulse duty cycle has significant grain refinement and concentration polarization reduction effects, but this seriously sacrifices the deposition rate. Under direct current conditions, there are numerous defects such as pores and micro cracks on the surface of composite coatings. When the duty cycle is 40%, the surface of the composite coating is smooth and dense, and its micro hardness and elastic recovery ratio (he/hmax) reach their maximum values of 806 HV and 0.48, respectively, while the average friction coefficient reaches its minimum value of 0.27, which indicates that it has good mechanical properties. This study provides a theoretical basis for the efficient preparation of Ni–P–based composite coatings and improve its application value in surface engineering. </div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":"48 2","pages":""},"PeriodicalIF":1.9,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144135274","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}

引用次数: 0

Effect of residual stress on adhesion behaviour of TiN coating 残余应力对TiN涂层粘附性能的影响

IF 1.9 4区材料科学

Bulletin of Materials Science Pub Date : 2025-05-19 DOI: 10.1007/s12034-025-03434-1

Yifei Zhang, Yuxuan Yao, Jianzhong Li, Wei Zhou

引用次数: 0

Effect of voltage waveform on characteristics of electrochemically exfoliated graphene nanoplatelets 电压波形对电化学剥离石墨烯纳米片特性的影响

IF 1.9 4区材料科学

Bulletin of Materials Science Pub Date : 2025-05-19 DOI: 10.1007/s12034-025-03429-y

G Awasthi, K Santhy, S Roy, S Agrawal, N Jamnapara, M Salot, S K Chaudhury

{"title":"Effect of voltage waveform on characteristics of electrochemically exfoliated graphene nanoplatelets","authors":"G Awasthi, K Santhy, S Roy, S Agrawal, N Jamnapara, M Salot, S K Chaudhury","doi":"10.1007/s12034-025-03429-y","DOIUrl":"10.1007/s12034-025-03429-y","url":null,"abstract":"<div>Electrochemical synthesis of graphene is an established process with high consistency and scalable potential. However, information on the effect of types of waveform on the quality of graphene nanoplatelets (NPs) is scanty. In this study, different types of waveform, namely direct current (DC), pulsed direct current (PDC) and bipolar waveform (BP) were used for the electrochemical exfoliation of graphite. All experiments were performed keeping other process parameters constant, such as electrolyte concentration (0.05 M KOH solution), temperature (303 K), distance between electrodes (6 cm) and stirring speed (200 rpm). It is observed that the type of waveform plays a significant effect on the defect concentration and size of the as-synthesized graphene NPs. The size of graphene NPs synthesized using PDC, BP and DC waveforms was in the range of 1–5, 60–220 and 250–450 nm, respectively. Raman spectroscopic analysis confirmed that multilayer graphene consisting of 4–5 layers of C atoms was successfully synthesized irrespective of the type of waveform. Further, the calculated defect concentration of graphene synthesized using PDC waveform was 1.64 ± 0.41 × 109 cm–2, which is significantly less than those prepared by DC and BP waveforms. The X-ray photoelectron spectroscopic (XPS) analysis showed that the highest C/O ratio (i.e., less oxygen) was noted in graphene synthesized using the PDC waveform. A proof-of-concept study showed a 50% increase in the specific capacitance of Al-doped ZnO nanopowder using graphene quantum dots.</div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":"48 2","pages":""},"PeriodicalIF":1.9,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144084986","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}

引用次数: 0

Nonlinear absorption effects and optical limiting properties of rational designed rGO-CNT composite probed by Z-scan technique 用z扫描技术探测合理设计的rGO-CNT复合材料的非线性吸收效应和光学极限特性

IF 1.9 4区材料科学

Bulletin of Materials Science Pub Date : 2025-05-15 DOI: 10.1007/s12034-025-03422-5

S Arockia Anushya, M Durairaj, T C Sabari Girisun, A Philominal

{"title":"Nonlinear absorption effects and optical limiting properties of rational designed rGO-CNT composite probed by Z-scan technique","authors":"S Arockia Anushya, M Durairaj, T C Sabari Girisun, A Philominal","doi":"10.1007/s12034-025-03422-5","DOIUrl":"10.1007/s12034-025-03422-5","url":null,"abstract":"<div>Carbon-based materials are in high demand due to their advanced high-tech applications. In contrast to traditional synthesis methods, a single-step green method is demonstrated for reducing graphene oxide. A simple one-step hydrothermal method successfully synthesized reduced graphene oxide (rGO)-multi-walled carbon nanotube (MWCNT). The composite was characterized using X-ray diffraction (XRD), micro-Raman, scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDAX), fourier transform infrared spectroscopy (FTIR), UV-visible absorption spectroscopy (UV-Vis) and zeta potential measurements. The present work aims to investigate the feasibility of utilizing nonlinear optical properties of reduced graphene oxide-carbon nanotube (rGO-CNT) composite as an optical limiter. The Z-scan technique was used to study the composite nonlinear absorption properties at a laser intensity of 532 nm. The result displayed that the composite material exhibits strong nonlinear absorption properties, chiefly resulting from the synergistic impact of rGO and CNT. The optical limiting behaviour of the rGO-CNT composite was evaluated, and it demonstrated excellent performance with a limiting threshold of 0.70 × 1012 W m–2. Combining MWCNT tubular shape, homogeneous decorating and strong visible absorption with rGO’s extensive conjugation for charge transfer leads to a highly improved nonlinear optical (NLO) response. The excellent optical limiting performance of rGO-CNT composite makes it an ideal candidate for laser safety and energy stabilizer devices operating in the 532 nm, 9 ns laser domain.<h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":"48 2","pages":""},"PeriodicalIF":1.9,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143949469","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}

引用次数: 0

Tribochemical reactions occurring on the friction surface of the composites based on polytetrafluoroethylene containing layered silicates 含层状硅酸盐的聚四氟乙烯基复合材料摩擦表面发生的摩擦化学反应

IF 1.9 4区材料科学

Bulletin of Materials Science Pub Date : 2025-05-08 DOI: 10.1007/s12034-025-03427-0

Iuliia V Kapitonova, Praskovia N Tarasova, Sakhayana N Danilova, Nadezhda N Lazareva, Aitalina A Okhlopkova

{"title":"Tribochemical reactions occurring on the friction surface of the composites based on polytetrafluoroethylene containing layered silicates","authors":"Iuliia V Kapitonova, Praskovia N Tarasova, Sakhayana N Danilova, Nadezhda N Lazareva, Aitalina A Okhlopkova","doi":"10.1007/s12034-025-03427-0","DOIUrl":"10.1007/s12034-025-03427-0","url":null,"abstract":"<div>The processes occurring on the friction surface of polymer composite materials (PCMs) based on polytetrafluoroethylene (PTFE) and layered (LS) silicates such as serpentine and phlogopite are described in the article. The studies were carried out with a scanning electron microscope and X-ray photoelectron microscopy and indicated the occurrence of tribo-oxidative processes in the polymer/metal contact zone. The investigation of the elemental composition of the friction surface by energy dispersive analysis revealed the appearance of new peaks corresponding to Fe and Cr. This fact indicates the interaction of the counterbody metal with the polymer during friction. The occurrence of defluorination and hydroxylation reactions of PTFE macromolecules on the friction surface of PCM was recorded based on the results of X-ray photoelectron spectroscopy. A possible mechanism is proposed for the tribochemical processes that occur on the friction surface of composites, regardless of the composition of the fillers. It has been established that a protective layer is formed consisting of filler particles and tribodestruction products due to tribochemical reactions on the friction surface. The formation of a secondary layer is not observed in the case of a composite with phlogopite. Thus, the main factor in increasing the wear resistance of PTFE-based PCM is the formation of new secondary structures on the friction surface in the friction zone due to the occurrence of tribo-oxidative processes. The generated secondary structures provide a protective surface that contributes to the shear friction stress.</div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":"48 2","pages":""},"PeriodicalIF":1.9,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143925515","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}

引用次数: 0

Dynamic evolution of hard orientations and consequent ductility loss during uniaxial tension of Ti6Al4V alloy Ti6Al4V合金单轴拉伸过程中硬取向的动态演变及其塑性损失

IF 1.9 4区材料科学

Bulletin of Materials Science Pub Date : 2025-04-30 DOI: 10.1007/s12034-025-03425-2

Ashish Kumar Saxena, Vivek Kumar Barnwal, K U Yazar, N Harshavardhana, Sushil Kumar Mishra

引用次数: 0