Pub Date : 2025-12-30DOI: 10.1016/j.rinma.2025.100882
Job W. Wafula , George S. Manyali , John W. Makokha
This work examines the structural, mechanical, electronic, and thermoelectric characteristics of YNbNiX (X = Si, Ge) double half-Heusler alloys using density functional theory (DFT) computations. Thermodynamic stability was demonstrated by formation energy estimates, and mechanical parameters show ductile behavior with good mechanical stability. YNbNiSi and YNbNiGe exhibit semiconducting characteristics, with indirect band gaps of 0.51 eV and 0.56 eV, respectively. The Boltzmann transport equation is used to investigate thermoelectric properties, which yield promising Seebeck coefficients and electrical conductivities. The dimensionless figure of merit (ZT) for YNbNiGe and YNbNiSi peaks at 0.85 and 0.68 at 300 K respectively. However, these values should be regarded as upper limits, as only the electronic contribution to thermal conductivity was considered, and the lattice contribution was not explicitly calculated. The figure of merit () increases with temperature suggesting that these are potential materials for energy harvesting applications at high temperature.
{"title":"DFT study of structural, mechanical, electronic, and thermoelectric properties of YNbNi2X2 (X=Si or Ge) double half-Heusler alloy","authors":"Job W. Wafula , George S. Manyali , John W. Makokha","doi":"10.1016/j.rinma.2025.100882","DOIUrl":"10.1016/j.rinma.2025.100882","url":null,"abstract":"<div><div>This work examines the structural, mechanical, electronic, and thermoelectric characteristics of YNbNi<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>X<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span> (X = Si, Ge) double half-Heusler alloys using density functional theory (DFT) computations. Thermodynamic stability was demonstrated by formation energy estimates, and mechanical parameters show ductile behavior with good mechanical stability. YNbNi<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>Si<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span> and YNbNi<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>Ge<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span> exhibit semiconducting characteristics, with indirect band gaps of 0.51 eV and 0.56 eV, respectively. The Boltzmann transport equation is used to investigate thermoelectric properties, which yield promising Seebeck coefficients and electrical conductivities. The dimensionless figure of merit (ZT) for YNbNi<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>Ge<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span> and YNbNi<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>Si<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span> peaks at 0.85 and 0.68 at 300 K respectively. However, these values should be regarded as upper limits, as only the electronic contribution to thermal conductivity was considered, and the lattice contribution was not explicitly calculated. The figure of merit (<span><math><mrow><mi>Z</mi><mi>T</mi></mrow></math></span>) increases with temperature suggesting that these are potential materials for energy harvesting applications at high temperature.</div></div>","PeriodicalId":101087,"journal":{"name":"Results in Materials","volume":"29 ","pages":"Article 100882"},"PeriodicalIF":0.0,"publicationDate":"2025-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145939069","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-29DOI: 10.1016/j.rinma.2025.100883
Seyed Mohammad Ali Mortazavi Moghadam, Ramin Hashemi
In addition to mechanical resistance, ductility is an essential property of multilayer metal composites. Therefore, in this study, the effect of annealing temperature (450, 600, and 750 °C) on the mechanical properties and ductility of copper/304L stainless steel/copper composite (Cu/304L/Cu) sheets produced by cold roll bonding (CRB) was investigated. The results showed that the CRB process significantly increases tensile strength and hardness, while decreasing elongation. However, due to recrystallization, the annealing treatment can moderate the effects of these changes in mechanical properties. Also, the composite's microstructure shows that at 600 °C, complete crystallization occurs in the 304L steel layer. Also, dimples in the SEM images indicate ductile fracture in the annealed samples. The dimples become deeper as the annealing temperature increases, confirming the greater formability. In addition, after plotting the forming limit diagram, it was found that the annealing heat treatment improves the ductility of the Cu/304L/Cu composite.
{"title":"Investigating the effect of annealing on the forming limit and mechanical properties of tri-layer copper/304L stainless steel /copper composite sheets","authors":"Seyed Mohammad Ali Mortazavi Moghadam, Ramin Hashemi","doi":"10.1016/j.rinma.2025.100883","DOIUrl":"10.1016/j.rinma.2025.100883","url":null,"abstract":"<div><div>In addition to mechanical resistance, ductility is an essential property of multilayer metal composites. Therefore, in this study, the effect of annealing temperature (450, 600, and 750 °C) on the mechanical properties and ductility of copper/304L stainless steel/copper composite (Cu/304L/Cu) sheets produced by cold roll bonding (CRB) was investigated. The results showed that the CRB process significantly increases tensile strength and hardness, while decreasing elongation. However, due to recrystallization, the annealing treatment can moderate the effects of these changes in mechanical properties. Also, the composite's microstructure shows that at 600 °C, complete crystallization occurs in the 304L steel layer. Also, dimples in the SEM images indicate ductile fracture in the annealed samples. The dimples become deeper as the annealing temperature increases, confirming the greater formability. In addition, after plotting the forming limit diagram, it was found that the annealing heat treatment improves the ductility of the Cu/304L/Cu composite.</div></div>","PeriodicalId":101087,"journal":{"name":"Results in Materials","volume":"29 ","pages":"Article 100883"},"PeriodicalIF":0.0,"publicationDate":"2025-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145939045","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-29DOI: 10.1016/j.rinma.2025.100880
V.I. Surin , A.A. Abu Ghazal , A.I. Alwaheba
This study investigates the evolution of structural changes in the structural steel X2CrNiMo18-14-3 during the initial stage of deformation hardening at room temperature, within a tensile stress range of 150–525 MPa. Using the Scanning Contact Potentiometry (SCP) method, an electrical approach to functional non-destructive testing, we obtained experimental results that shed light on the underlying mechanisms of deformation. The analysis reveals that significant shear processes occur well before the yield strength is reached, leading to the formation of microscopic bands and the accumulation of microplastic deformation. In the elastic region, light dislocation sliding with minimal deformation hardening is initiated. As the applied load increases, particularly at stress ratios of σ/σelastic ≥ 0.34, the potentiograms exhibit an increasing number of narrow shear bands oriented perpendicular to the load direction. This phenomenon is accompanied by changes in surface conditions and deformation activity, which relate to dynamic waviness and surface roughness. As the limit of elasticity is approached, competition intensifies between the processes of strengthening and softening, leading to the development of wide shear bands and large shapes on the potentiograms. The study provides insights into the mechanisms of dislocation sliding and the interplay of deformation processes, highlighting the critical transition from microplastic deformation to yielding in structural steel. This research contributes to a deeper understanding of the mechanical behavior of steel under tensile stress and the implications for its applications in structural engineering.
{"title":"Investigation of structural evolution in X2CrNiMo18-14-3 steel during initial deformation hardening","authors":"V.I. Surin , A.A. Abu Ghazal , A.I. Alwaheba","doi":"10.1016/j.rinma.2025.100880","DOIUrl":"10.1016/j.rinma.2025.100880","url":null,"abstract":"<div><div>This study investigates the evolution of structural changes in the structural steel X2CrNiMo18-14-3 during the initial stage of deformation hardening at room temperature, within a tensile stress range of 150–525 MPa. Using the Scanning Contact Potentiometry (SCP) method, an electrical approach to functional non-destructive testing, we obtained experimental results that shed light on the underlying mechanisms of deformation. The analysis reveals that significant shear processes occur well before the yield strength is reached, leading to the formation of microscopic bands and the accumulation of microplastic deformation. In the elastic region, light dislocation sliding with minimal deformation hardening is initiated. As the applied load increases, particularly at stress ratios of σ/σ<sub>elastic</sub> ≥ 0.34, the potentiograms exhibit an increasing number of narrow shear bands oriented perpendicular to the load direction. This phenomenon is accompanied by changes in surface conditions and deformation activity, which relate to dynamic waviness and surface roughness. As the limit of elasticity is approached, competition intensifies between the processes of strengthening and softening, leading to the development of wide shear bands and large shapes on the potentiograms. The study provides insights into the mechanisms of dislocation sliding and the interplay of deformation processes, highlighting the critical transition from microplastic deformation to yielding in structural steel. This research contributes to a deeper understanding of the mechanical behavior of steel under tensile stress and the implications for its applications in structural engineering.</div></div>","PeriodicalId":101087,"journal":{"name":"Results in Materials","volume":"29 ","pages":"Article 100880"},"PeriodicalIF":0.0,"publicationDate":"2025-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145939583","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-29DOI: 10.1016/j.rinma.2025.100879
Nayem Hossain , Mohammad Asaduzzaman Chowdhury , Safiul Islam , Tanjid Al Tajim , Md. Zisat Hossen , Md. Ashikur Rahman , Md. Shakil Chowdhury
Although titanium is used as a dental material, it has limitations. The limitations can be overcome by incorporating nanoparticles (NPs) into titanium, as NPs possess excellent physical, morphological, and biological properties. Titanium-based nanocomposites were fabricated in this research by reinforcing silver nanoparticles (AgNPs) with sintering at 800 °C for 4 h. The fabrication consists of ball-milling stainless steel AgNPs and TiO2, compacting them in a stainless steelmold, and sintering. The fabricated nanocomposites were characterized by hardness, surface roughness, Fourier Transformed Infrared Spectroscopy (FTIR), Field Emission Scanning Electron Microscopy (FESEM), and X-ray diffraction (XRD) analyses. Reinforcement with AgNPs increased the samples' hardness, reaching a maximum Rockwell hardness of 36. The addition of 2 % AgNPs improved surface roughness from 2.55 μm to 3.41 μm. Successful incorporation of AgNPs with TiO2 was observed in FESEM images. A sharp peak in the XRD analysis confirms the formation of crystals in the fabricated nanocomposite samples. Moreover, the presence of AgNPs decreased crystallinity from 42 % to 35 % which is helpful for improved antimicrobial properties. The results obtained demonstrate the potential of the fabricated nanocomposite samples for dental applications.
{"title":"Synthesis and morphological characterization of silver nanoparticles reinforced titanium-based nanocomposites for dental applications","authors":"Nayem Hossain , Mohammad Asaduzzaman Chowdhury , Safiul Islam , Tanjid Al Tajim , Md. Zisat Hossen , Md. Ashikur Rahman , Md. Shakil Chowdhury","doi":"10.1016/j.rinma.2025.100879","DOIUrl":"10.1016/j.rinma.2025.100879","url":null,"abstract":"<div><div>Although titanium is used as a dental material, it has limitations. The limitations can be overcome by incorporating nanoparticles (NPs) into titanium, as NPs possess excellent physical, morphological, and biological properties. Titanium-based nanocomposites were fabricated in this research by reinforcing silver nanoparticles (AgNPs) with sintering at 800 °C for 4 h. The fabrication consists of ball-milling stainless steel AgNPs and TiO<sub>2</sub>, compacting them in a stainless steelmold, and sintering. The fabricated nanocomposites were characterized by hardness, surface roughness, Fourier Transformed Infrared Spectroscopy (FTIR), Field Emission Scanning Electron Microscopy (FESEM), and X-ray diffraction (XRD) analyses. Reinforcement with AgNPs increased the samples' hardness, reaching a maximum Rockwell hardness of 36. The addition of 2 % AgNPs improved surface roughness from 2.55 μm to 3.41 μm. Successful incorporation of AgNPs with TiO<sub>2</sub> was observed in FESEM images. A sharp peak in the XRD analysis confirms the formation of crystals in the fabricated nanocomposite samples. Moreover, the presence of AgNPs decreased crystallinity from 42 % to 35 % which is helpful for improved antimicrobial properties. The results obtained demonstrate the potential of the fabricated nanocomposite samples for dental applications.</div></div>","PeriodicalId":101087,"journal":{"name":"Results in Materials","volume":"29 ","pages":"Article 100879"},"PeriodicalIF":0.0,"publicationDate":"2025-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145939070","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Bio-inspired strategies are used as well as previous works in the aim of forming nanotubes for their unique wetting properties. Here, nanotubes are prepared by soft-template electropolymerization in micellar solution. Monomers containing two triphenylamine segments are synthesized and studied for the first time. The formation of nanotubes is favored using monomers with extremely strong π-stacking interactions. Electrochemical analyzes of the electrodeposited films demonstrated the main presence of monomer, except with one of the monomers for which the peak of oligomers is much more intense. Extremely long nanotubes are obtained especially with one of the monomer. The surfaces with nanotubes are here superhydrophilic because water enters inside the pores.
{"title":"Bioinspired nanotubes by soft-template electropolymerization from bis(triphenylamine)-based monomers","authors":"Amadou Ousmane Ba , Diawo Diallo , Hawa Ndiaye , Abdoulaye Dramé , Alioune Diouf , Frédéric Guittard , Thierry Darmanin","doi":"10.1016/j.rinma.2025.100878","DOIUrl":"10.1016/j.rinma.2025.100878","url":null,"abstract":"<div><div>Bio-inspired strategies are used as well as previous works in the aim of forming nanotubes for their unique wetting properties. Here, nanotubes are prepared by soft-template electropolymerization in micellar solution. Monomers containing two triphenylamine segments are synthesized and studied for the first time. The formation of nanotubes is favored using monomers with extremely strong π-stacking interactions. Electrochemical analyzes of the electrodeposited films demonstrated the main presence of monomer, except with one of the monomers for which the peak of oligomers is much more intense. Extremely long nanotubes are obtained especially with one of the monomer. The surfaces with nanotubes are here superhydrophilic because water enters inside the pores.</div></div>","PeriodicalId":101087,"journal":{"name":"Results in Materials","volume":"29 ","pages":"Article 100878"},"PeriodicalIF":0.0,"publicationDate":"2025-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145939071","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-26DOI: 10.1016/j.rinma.2025.100873
Ahmed Ashteyat , Ibrahim Al-Ani , Mousa Shhabat , Abdelmalek H. Aljarah , Hussien Al-Kroom
The increasing embodied carbon dioxide emissions and the growing consumption of natural resources in the construction sector are driving the search for more sustainable solutions to mitigate these impacts. Using recycled materials in construction is an effective strategy for enhancing environmental sustainability and improving resource efficiency. With the ever-increasing volumes of marble and glass waste generated worldwide, it has become essential to explore practical approaches for incorporating these materials into construction applications. This research aims to develop a concrete mixture that reduces cement and sand usage by examining the partial replacement of cement with waste marble powder (WMP) as a cementitious material and the partial replacement of sand with waste glass powder (WGP) as a filler. Several studies have demonstrated positive effects of using marble or glass waste individually; therefore, this study investigates their combined influence on concrete performance. This research focuses on evaluating the effects of these substitutions on the mechanical properties (compressive and tensile strength) and physical properties (density and workability) of lightweight foamed concrete (LWFC) to produce a lightweight and environmentally friendly mixture. Sixteen mixes were prepared using varying proportions of WMP and WGP (0 %, 5 %, 10 %, and 15 %). The results showed a reduction in density (1679–1798 kg/m3) and compressive strength up to 47.2 % for WMP and 39.4 % for WGP as the replacement levels increased, along with a noticeable improvement in workability. Based on the balance between strength and weight, the optimal substitution levels were identified as 5–10 % WMP as a cement replacement, 15 % WGP as a sand replacement, and a combined mix containing 5 % WMP and 5 % WGP. Furthermore, future research should investigate the durability and microstructural characteristics of LWFC containing WMP and WGP, as well as assess the environmental and economic benefits associated with their large-scale application in the construction sector.
{"title":"Development of eco-friendly lightweight foamed concrete using waste marble powder and waste glass powder","authors":"Ahmed Ashteyat , Ibrahim Al-Ani , Mousa Shhabat , Abdelmalek H. Aljarah , Hussien Al-Kroom","doi":"10.1016/j.rinma.2025.100873","DOIUrl":"10.1016/j.rinma.2025.100873","url":null,"abstract":"<div><div>The increasing embodied carbon dioxide emissions and the growing consumption of natural resources in the construction sector are driving the search for more sustainable solutions to mitigate these impacts. Using recycled materials in construction is an effective strategy for enhancing environmental sustainability and improving resource efficiency. With the ever-increasing volumes of marble and glass waste generated worldwide, it has become essential to explore practical approaches for incorporating these materials into construction applications. This research aims to develop a concrete mixture that reduces cement and sand usage by examining the partial replacement of cement with waste marble powder (WMP) as a cementitious material and the partial replacement of sand with waste glass powder (WGP) as a filler. Several studies have demonstrated positive effects of using marble or glass waste individually; therefore, this study investigates their combined influence on concrete performance. This research focuses on evaluating the effects of these substitutions on the mechanical properties (compressive and tensile strength) and physical properties (density and workability) of lightweight foamed concrete (LWFC) to produce a lightweight and environmentally friendly mixture. Sixteen mixes were prepared using varying proportions of WMP and WGP (0 %, 5 %, 10 %, and 15 %). The results showed a reduction in density (1679–1798 kg/m<sup>3</sup>) and compressive strength up to 47.2 % for WMP and 39.4 % for WGP as the replacement levels increased, along with a noticeable improvement in workability. Based on the balance between strength and weight, the optimal substitution levels were identified as 5–10 % WMP as a cement replacement, 15 % WGP as a sand replacement, and a combined mix containing 5 % WMP and 5 % WGP. Furthermore, future research should investigate the durability and microstructural characteristics of LWFC containing WMP and WGP, as well as assess the environmental and economic benefits associated with their large-scale application in the construction sector.</div></div>","PeriodicalId":101087,"journal":{"name":"Results in Materials","volume":"29 ","pages":"Article 100873"},"PeriodicalIF":0.0,"publicationDate":"2025-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145939581","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-24DOI: 10.1016/j.rinma.2025.100836
Afshin Rahdar , Vahid Bazargan , Masoumeh Foroutan
Microfluidic droplet generation has emerged as a powerful tool in life-science applications due to its ability to precisely control fluid dynamics at the microscale. However, accurately predicting droplet diameter and generation rate remains challenging because the underlying multiphase behavior arises from highly nonlinear interactions among flow conditions, device geometries, and fluid properties, particularly in systems involving single and double emulsions. In this study, we address this challenge by developing a predictive framework based on the XGBoost machine-learning algorithm to estimate droplet diameter and generation rate with high accuracy across a wide range of devices and operating conditions. The framework leverages a comprehensive experimental database and employs a two-stage modeling strategy in which droplet diameter is first predicted and subsequently used as an intermediate variable for estimating generation rate. Evaluation of the model demonstrates excellent agreement with experimental measurements across diverse geometries and flow regimes. Furthermore, SHAP-based feature importance analysis reveals that key geometric and physical parameters dominate droplet formation behavior, providing valuable insights for microfluidic system optimization. Additional analyses show that the proposed framework not only performs robustly under standard operating conditions but also maintains high reliability when exposed to significant variations in flow and fluid properties. This capability makes the model a practical and efficient tool for designing next-generation microfluidic devices, particularly for complex biomedical applications. Overall, the developed methodology can substantially accelerate the design, testing, and optimization processes of droplet-based microfluidic systems while reducing experimental cost and development time.
{"title":"XGBoost-based predictive modeling of droplet size and generation rate in single and double microfluidic emulsions","authors":"Afshin Rahdar , Vahid Bazargan , Masoumeh Foroutan","doi":"10.1016/j.rinma.2025.100836","DOIUrl":"10.1016/j.rinma.2025.100836","url":null,"abstract":"<div><div>Microfluidic droplet generation has emerged as a powerful tool in life-science applications due to its ability to precisely control fluid dynamics at the microscale. However, accurately predicting droplet diameter and generation rate remains challenging because the underlying multiphase behavior arises from highly nonlinear interactions among flow conditions, device geometries, and fluid properties, particularly in systems involving single and double emulsions. In this study, we address this challenge by developing a predictive framework based on the XGBoost machine-learning algorithm to estimate droplet diameter and generation rate with high accuracy across a wide range of devices and operating conditions. The framework leverages a comprehensive experimental database and employs a two-stage modeling strategy in which droplet diameter is first predicted and subsequently used as an intermediate variable for estimating generation rate. Evaluation of the model demonstrates excellent agreement with experimental measurements across diverse geometries and flow regimes. Furthermore, SHAP-based feature importance analysis reveals that key geometric and physical parameters dominate droplet formation behavior, providing valuable insights for microfluidic system optimization. Additional analyses show that the proposed framework not only performs robustly under standard operating conditions but also maintains high reliability when exposed to significant variations in flow and fluid properties. This capability makes the model a practical and efficient tool for designing next-generation microfluidic devices, particularly for complex biomedical applications. Overall, the developed methodology can substantially accelerate the design, testing, and optimization processes of droplet-based microfluidic systems while reducing experimental cost and development time.</div></div>","PeriodicalId":101087,"journal":{"name":"Results in Materials","volume":"29 ","pages":"Article 100836"},"PeriodicalIF":0.0,"publicationDate":"2025-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145939585","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-22DOI: 10.1016/j.rinma.2025.100847
S. Benkhirat , E. Ribeiro , K. Nouneh , G. Plantard
There has been growing interest in geopolymer foams, particularly with regard to the possibility of imparting macroporous properties with a honeycomb structure. These characteristics are relevant to the problems posed by solar applications. As the photo-conversion process is intimately linked to radiation transfer, it is necessary to understand and describe the correlations between the structural and radiative properties of foams. This study focused on the detailed analysis of the radiative properties of macroporous cellular geopolymer foams with different characteristics in terms of porosity and pore size distribution. Transmittance and reflectance measurements were carried out using a dedicated optical bench. The Two-Flux approximation model was used to describe the radiative transfers taking place in the material. Specific absorption and scattering coefficients were accurately represented in the UV and visible ranges. The importance of the structure of macroporous cellular foams on radiative properties has been discussed. Our results also show that it is possible to play on structural characteristics (porosity, pore size) to obtain distinct radiative properties. This makes it possible to select the most appropriate foam for optimum radiation utilization in a given photoreactor configuration.
{"title":"Influence of morphology on the radiative properties of geopolymer foams: A theoretical and experimental analysis","authors":"S. Benkhirat , E. Ribeiro , K. Nouneh , G. Plantard","doi":"10.1016/j.rinma.2025.100847","DOIUrl":"10.1016/j.rinma.2025.100847","url":null,"abstract":"<div><div>There has been growing interest in geopolymer foams, particularly with regard to the possibility of imparting macroporous properties with a honeycomb structure. These characteristics are relevant to the problems posed by solar applications. As the photo-conversion process is intimately linked to radiation transfer, it is necessary to understand and describe the correlations between the structural and radiative properties of foams. This study focused on the detailed analysis of the radiative properties of macroporous cellular geopolymer foams with different characteristics in terms of porosity and pore size distribution. Transmittance and reflectance measurements were carried out using a dedicated optical bench. The Two-Flux approximation model was used to describe the radiative transfers taking place in the material. Specific absorption and scattering coefficients were accurately represented in the UV and visible ranges. The importance of the structure of macroporous cellular foams on radiative properties has been discussed. Our results also show that it is possible to play on structural characteristics (porosity, pore size) to obtain distinct radiative properties. This makes it possible to select the most appropriate foam for optimum radiation utilization in a given photoreactor configuration.</div></div>","PeriodicalId":101087,"journal":{"name":"Results in Materials","volume":"29 ","pages":"Article 100847"},"PeriodicalIF":0.0,"publicationDate":"2025-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145977521","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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