Materialwissenschaft und Werkstofftechnik最新文献

{"title":"Impressum: Materialwiss. Werkstofftech. 5/2025","authors":"","doi":"10.1002/mawe.202580521","DOIUrl":"https://doi.org/10.1002/mawe.202580521","url":null,"abstract":"","PeriodicalId":18366,"journal":{"name":"Materialwissenschaft und Werkstofftechnik","volume":"56 5","pages":""},"PeriodicalIF":1.2,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mawe.202580521","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144213962","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of thermomechanical processing on structure and mechanical properties of WNiCo\u0000 Einfluss der thermomechanischen Veredelung auf Struktur und mechanische Eigenschaften der Wolframschwerlegierung WNiCo","authors":"J. Walek,&nbsp;R. Kocich,&nbsp;L. Kunčická,&nbsp;J. Kopeček","doi":"10.1002/mawe.202400354","DOIUrl":"https://doi.org/10.1002/mawe.202400354","url":null,"abstract":"<p>The study characterizes the effects of intensive plastic deformation, realized by the rotary swaging method, on the deformation behavior of WNiCo tungsten heavy alloy samples. To assess the differences in the deformation behaviors of the samples, evaluated via uniaxial compression tests (UCT), and characterize the microstructures, i. e. occurrence and development of hardening/softening processes, two different temperatures of swaging (900 °C and 1200 °C), and two different uniaxial compression testing temperatures (1100 °C and 1200 °C), were used. A relatively high strain rate of 10 s⁻¹ was chosen for the testing because of the typical use of the tungsten heavy alloy for kinetic penetrators. The achieved results indicate that the development of softening processes, especially dynamic recrystallization, can occur within the swaged material, depending on the processing/testing conditions. Swaging at the lower temperature of 900 °C introduced significant work hardening and accumulation of strain, which promoted the development of dynamic recrystallization during the subsequent hot temperature testing. Swaging at 1200 °C, on the other hand, facilitated dynamic recrystallization and relaxation (especially within the nickel-cobalt matrix) already during processing, which consequently increased the activation energy necessary for the development of recrystallization during the hot testing.</p>","PeriodicalId":18366,"journal":{"name":"Materialwissenschaft und Werkstofftechnik","volume":"56 5","pages":"697-704"},"PeriodicalIF":1.2,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144213957","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}

{"title":"Materialwiss. Werkstofftech. 5/2025","authors":"","doi":"10.1002/mawe.202580511","DOIUrl":"https://doi.org/10.1002/mawe.202580511","url":null,"abstract":"","PeriodicalId":18366,"journal":{"name":"Materialwissenschaft und Werkstofftechnik","volume":"56 5","pages":"631-635"},"PeriodicalIF":1.2,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144213959","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}

{"title":"Cover Picture: (Materialwiss. Werkstofftech. 5/2025)","authors":"","doi":"10.1002/mawe.202580501","DOIUrl":"https://doi.org/10.1002/mawe.202580501","url":null,"abstract":"<p>\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure>\u0000 </p>","PeriodicalId":18366,"journal":{"name":"Materialwissenschaft und Werkstofftechnik","volume":"56 5","pages":""},"PeriodicalIF":1.2,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mawe.202580501","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144213961","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Determination of heat transfer coefficients in wood-based panel finishing\u0000 Bestimmung der Wärmeübergangskoeffizienten in der Veredelung von Holzwerkstoffplatten","authors":"N. Zechner,&nbsp;F. Birkelbach,&nbsp;P. Schwarzmayr,&nbsp;R. Hofmann","doi":"10.1002/mawe.202400364","DOIUrl":"https://doi.org/10.1002/mawe.202400364","url":null,"abstract":"<p>Wood-based panels such as fiberboard, have become indispensable materials in everyday life - from furniture to outdoor paneling. Despite the widespread use of Industry 4.0 methods across all industry sectors, their application in the wood-based panel sector has been very limited so far. This study highlights the untapped potential of Industry 4.0 in the wood-based panel sector by using digital methods to improve finishing of wood-based panels with resin-impregnated papers in a short-cycle hot press by thermal modelling. For an accurate temperature estimation, precise heat transfer coefficients are of great importance. Currently, no data for these heat transfer coefficients are available in literature. We used experimental data in combination with a digital thermal model to determine the heat transfer coefficients of the system by using an optimization algorithm. In this work, we describe the experimental setup used, the extensive measurement campaigns conducted and how the digital model was validated and adjusted to allow the optimization algorithm to produce accurate estimations of the system′s heat transfer coefficients. In conclusion, our study underscores the potential of Industry 4.0 methodologies in the underrepresented field of wood-based panel manufacturing by utilizing a combination of experimental and modern digital methods.</p>","PeriodicalId":18366,"journal":{"name":"Materialwissenschaft und Werkstofftechnik","volume":"56 5","pages":"646-653"},"PeriodicalIF":1.2,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mawe.202400364","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144214157","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Prediction of residence time distribution of a single-screw rubber extruder by parameterizing the transfer function using experimental data\u0000 Vorhersage der Verweilzeitverteilung eines Einschnecken-Kautschukextruders durch Parametrisierung der Übertragungsfunktion anhand experimenteller Daten","authors":"P. Frenzel,&nbsp;F. Birkelbach,&nbsp;S. Koch,&nbsp;F. Arthofer,&nbsp;R. Hofmann","doi":"10.1002/mawe.202400362","DOIUrl":"https://doi.org/10.1002/mawe.202400362","url":null,"abstract":"<p>With the ongoing digitalization in the industrial sector, also called Industry 4.0, automation techniques offer huge potential for the rubber industry. Advanced automation methods allow for precise control of the extrusion process and increase the consistency in product quality. Since product quality is affected by process parameters in a complex way, predicting the flow conditions, the thermal conditions and the mixing in an extruder is a prerequisite for more sophisticated Industry 4.0 applications. These Industry 4.0 applications require short computing times and thus sufficiently fast models for online implementation in production systems. A useful measure for the flow inside the extruder is the residence time distribution. It enables an analysis of the residence time of the material particle in the process and subsequently a statement about the mixing characteristics. For the investigation of the residence time distribution and the effect of process parameters on residence time properties, a single-screw rubber extruder equipped with a gear pump was used. In this contribution, we present a method to identify the residence time distribution for a certain compound using experiments. We describe an experimental procedure with a special tracer material and a modified image processing method to identify the residence time distribution. The experimental data and analyses, in particular, the input and output signals of the experiments, are used to determine the residence time distribution (transfer function) of the system. Based on previous findings from literature and experimental studies of the process, the influences of selected parameters on the transfer function were investigated and used to parameterize a general transfer function for the chosen compound. Consequently, the derived transfer function is used to predict the residence time distribution of the process and the results are validated with experimental data. We discuss the potential of the method for an online implementation in a production system and outline how this method can be used within predictions for advanced process control.</p>","PeriodicalId":18366,"journal":{"name":"Materialwissenschaft und Werkstofftechnik","volume":"56 5","pages":"684-696"},"PeriodicalIF":1.2,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mawe.202400362","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144214220","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of cellulose fiber reinforcement in mechanical and morphological properties of polyurethane-silica aerogel composites for thermal insulation applications\u0000 Einfluss der Zellulosefaserverstärkung auf die mechanischen und morphologischen Eigenschaften von Polyurethan-Silica Aerogel-Verbundwerkstoffen für Wärmedämmanwendungen","authors":"I. Nuhu,&nbsp;N. Awang,&nbsp;M. A. Mat Yajid,&nbsp;W. F. F. Wan Ali","doi":"10.1002/mawe.202400372","DOIUrl":"https://doi.org/10.1002/mawe.202400372","url":null,"abstract":"<p>Polyurethane-silica aerogel (PUSA) composite has shown promising performance in thermal insulation application, owing to its microstructure that offers thermal resistance within its cellular matrix. The inclusion of silica aerogel into polyurethane enhances both the mechanical and thermal properties of the composite. Previous research reported 1 wt.–% silica aerogel loading as optimal in material compressive strength and higher concentrations was found to negatively impact the cell structure and ultimately hinder thermal performance. In the quest for enhanced properties cellulose fibre (CF) was introduced into polyurethane-silica aerogel. Composites with variable loading of cellulose fibre (0.5 wt.–%, 0.75 wt.–% and 1.0 wt.–%) as PUCF1S, PUCF2S and PUCF3S were fabricated. It was found that composite PUCF2S has the highest compressive strength of 0.92 MPa, demonstrating 64 % increase compared to pristine composite (polyurethane-silica aerogel). The matrix microstructure as revealed by field emission scanning electron microscopy was discovered to have uniform cell size facilitated by uniform particle dispersion within the matrix. The cellulose fibre participated in the cell nucleation leaving behind an enhanced cell with reduced cell size that supports compressive loads and thermal insulation performance.</p>","PeriodicalId":18366,"journal":{"name":"Materialwissenschaft und Werkstofftechnik","volume":"56 5","pages":"734-742"},"PeriodicalIF":1.2,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144214216","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}

{"title":"Influence of carbon black from pyrolysis of waste tires in a polymer matrix\u0000 Einfluss von Ruß aus der Pyrolyse von Altreifen in einer Polymermatrix","authors":"S. Božeková,&nbsp;D. Ondrušová,&nbsp;Z. Mičicová,&nbsp;M. Pajtášová,&nbsp;P. Skalková","doi":"10.1002/mawe.202400361","DOIUrl":"https://doi.org/10.1002/mawe.202400361","url":null,"abstract":"<p>Tires are one of the most important products in world transportation industry. The number of cars increases on the road and thus the amount of waste tires. Pyrolysis is one of the possibilities of recycling used waste tires. This work is focus on the characterization and application product (carbon black) from pyrolysis of waste tires in the polymer matrix. Carbon black from pyrolysis of waste tires is used as a filler in the polymer matrix in order to replace by conventional carbon black (N339 and N660). Thermal analysis, infrared spectrometry and Energy-dispersive x-ray spectroscopy analysis are used to determine the changes in the properties of waste tires pyrolysis carbon black compared to conventional carbon blacks. A scanning electron microscope is used to characterize the shape of the carbon black. After the application of fillers in the polymer matrix, the cure characteristics, reinforcing of the mixture and the mechanical properties are determined. Fraction adjustment of the carbon black from pyrolysis of waste tire shows a positive influence on the properties.</p>","PeriodicalId":18366,"journal":{"name":"Materialwissenschaft und Werkstofftechnik","volume":"56 5","pages":"666-675"},"PeriodicalIF":1.2,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144214222","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}

{"title":"Simulation studies of printed circuit board using finite element method to evaluate the potential of cellulose fibres to replace glass fibres\u0000 Simulationsstudien an Leiterplatten mithilfe der Finite-Elemente-Methode zur Bewertung des Potenzials von Zellulosefasern als Ersatz für Glasfasern","authors":"J. C. Velosa,&nbsp;J. M. R. Curto","doi":"10.1002/mawe.202400028","DOIUrl":"https://doi.org/10.1002/mawe.202400028","url":null,"abstract":"<p>The replacement of glass fibres by cellulose-based fibres in printed circuit board (PCB) is motivated by environmental reasons since the use of biodegradable components from renewable sources will have a significative impact in the life-cycle assessment and sustainability evaluation of these materials. To study the potential of replacement of glass fibres by natural fibres in printed circuit board manufacturing we have used a finite element method (FEM) computational simulation methodology to evaluate the influence of key structural parameters on their thermomechanical properties, with the goal of predicting and quantifying its warpage at soldering process temperatures. In our work some printed circuit board (PCB) configurations have been selected and modelled using different natural fibres and compared with conventional printed circuit board systems, designated by flame retardant epoxy (FR4), that are made from glass fibres, epoxide resin and copper foils. The simulation results indicate that the printed circuit board assembly process, namely the number of layers, has a major influence on the key thermomechanical properties that were studied. Some optimized printed circuit board configurations were selected, based on the simulation studies, and the natural fibres were classified according to their potential to be used in the development of sustainable printed circuit board materials.</p>","PeriodicalId":18366,"journal":{"name":"Materialwissenschaft und Werkstofftechnik","volume":"56 5","pages":"715-725"},"PeriodicalIF":1.2,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144214225","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}

{"title":"Surface characteristics of thermoplastic films indirectly modified by plasma under static conditions\u0000 Oberflächeneigenschaften von thermoplastischen Filmen, die indirekt durch Plasma unter statischen Bedingungen modifiziert wurden","authors":"R. Janík,&nbsp;S. Ďurišová,&nbsp;M. Kohutiar,&nbsp;J. Escherová,&nbsp;K. Moricová","doi":"10.1002/mawe.202400365","DOIUrl":"https://doi.org/10.1002/mawe.202400365","url":null,"abstract":"<p>This study investigates the surface modification of polymer films, specifically polyvinyl chloride <b>(</b>PVC), polyethylene terephthalate (PET), and polypropylene (PP), using diffuse plasma treatment with a focus on the “backside treatment” effect, where surfaces not directly exposed to plasma undergo measurable changes. The primary goal was to observe changes in surface properties, such as the contact angle of polyvinyl chloride, before and after plasma modification, and to analyze the extent of backside treatment. Diffuse plasma treatment effectively actiates polymer surfaces, altering their surface energy, wettability, and adhesion properties. Contact angle measurements on polyvinyl chloride indicated a significant reduction post-treatment, confirming successful surface activation. This enhancement in wettability is critical for applications demanding strong adhesion. Backside treatment, a key phenomenon in this study, was confirmed as a real and measurable effect. It was observed that even surfaces shielded from direct plasma exposure showed significant changes, which can influence the overall properties of the polymer films. This finding is essential for applications requiring uniform surface modification. Image analysis further supported these results, revealing alterations in surface morphology across different plasma treatment models. The extent of these changes varied depending on the polymer type, plasma parameters, and exposure model. In conclusion, this study demonstrates that diffuse plasma treatment induces significant surface modifications on polyvinyl chloride, polyethylene terephthalate, and polypropylene films. The backside treatment effect was proven to be a real and important factor in these modifications, with implications for industries requiring precise surface treatments. These findings suggest that controlling backside treatment could enhance material performance in various applications.</p>","PeriodicalId":18366,"journal":{"name":"Materialwissenschaft und Werkstofftechnik","volume":"56 5","pages":"743-756"},"PeriodicalIF":1.2,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144214217","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}