The present work deals with the effect of the sodium content on the thermal, structural, ellipsometric, and THz properties of germanate glasses. The sodium germanate glasses of composition xNa2O.(100-x)GeO2 with 10 ≤x≤ 30 (mol%) are prepared by conventional melt quenching technique. The optical properties of sodium germanate (GN) glass system, including refractive index, dielectric constant, absorption coefficient and transmittance are measured at terahertz (THz) frequencies. High refractive index, n(THz) and high dielectric constant, ԑ(THz) of germanate glasses have been identified in the sub-terahertz region (0.2–1 THz). The wavelength-dependent refractive index, n(λ) has been analyzed with the ellipsometric analysis. The refractive index in the 1.52–1.65 range is obtained at the 550 nm wavelength for the present system. Optical properties are explained based on the structure investigated by Raman spectroscopy. Thermal stability factors are also examined with the differential thermal analysis (DTA) to relate the thermal and THz parameters for THz applications.
{"title":"Terahertz-time domain spectroscopy and optical characterization of germanate glass systems for photonic applications","authors":"Haramanpreet Kaur , Ruturaj Puranik , Vibhavari Parkar , Snehal Haldankar , Fathimath Faseela , Shriganesh Prabhu , Sandeep Kaur , Neetu Verma , Gopi Sharma","doi":"10.1016/j.jnoncrysol.2024.123369","DOIUrl":"10.1016/j.jnoncrysol.2024.123369","url":null,"abstract":"<div><div>The present work deals with the effect of the sodium content on the thermal, structural, ellipsometric, and THz properties of germanate glasses. The sodium germanate glasses of composition xNa<sub>2</sub>O.(100-x)GeO<sub>2</sub> with 10 ≤x≤ 30 (mol%) are prepared by conventional melt quenching technique. The optical properties of sodium germanate (GN) glass system, including refractive index, dielectric constant, absorption coefficient and transmittance are measured at terahertz (THz) frequencies. High refractive index, n(THz) and high dielectric constant, ԑ(THz) of germanate glasses have been identified in the sub-terahertz region (0.2–1 THz). The wavelength-dependent refractive index, n(λ) has been analyzed with the ellipsometric analysis. The refractive index in the 1.52–1.65 range is obtained at the 550 nm wavelength for the present system. Optical properties are explained based on the structure investigated by Raman spectroscopy. Thermal stability factors are also examined with the differential thermal analysis (DTA) to relate the thermal and THz parameters for THz applications.</div></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"650 ","pages":"Article 123369"},"PeriodicalIF":3.2,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143138318","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The present investigation explores the quaternary metallic glass (MG) Fe86–2xZr8+xB5+xCu1 (x = 0,1& 2) ribbons that examined for the magnetocaloric effect (MCE) and glass forming ability (GFA) characteristics of the ribbons. The MGs are spun into a ribbon with typical amorphous characteristics by rapid solidification technique and XRD, DSC and VSM have examined their structure and magnetic properties. The observed increase in the α parameter with the increase in the boron and zirconium concentration suggests an increase in the amorphous character of the material. The magnetization-temperature curve demonstrates that the Curie transition temperature consistently increases with the presence of boron and zirconium, and shows a significant shift in entropy, ranging from 1.68 to 2.01 J.kg-1K-1 at a magnetic field of 2.5 T. Additionally, it exhibits a noteworthy Relative Cooling Power of 38.76–53.74 J.kg-1. The potential of this material as an exceptional low-temperature refrigeration material around room temperature is demonstrated by these outcomes.
{"title":"Tailoring the GFA, -∆SM and RC of Fe86-2xZr8+xB5+xCu1 (x = 0,1& 2) metallic glass ribbons for magnetocaloric applications","authors":"Anjana Vinod , Arvindha Babu Diraviam , Manivel Raja Muthuvel , Madhuri Wuppulluri","doi":"10.1016/j.jnoncrysol.2024.123376","DOIUrl":"10.1016/j.jnoncrysol.2024.123376","url":null,"abstract":"<div><div>The present investigation explores the quaternary metallic glass (MG) Fe<sub>86–2x</sub>Zr<sub>8+x</sub>B<sub>5+x</sub>Cu<sub>1</sub> (<em>x</em> = 0,1& 2) ribbons that examined for the magnetocaloric effect (MCE) and glass forming ability (GFA) characteristics of the ribbons. The MGs are spun into a ribbon with typical amorphous characteristics by rapid solidification technique and XRD, DSC and VSM have examined their structure and magnetic properties. The observed increase in the α parameter with the increase in the boron and zirconium concentration suggests an increase in the amorphous character of the material. The magnetization-temperature curve demonstrates that the Curie transition temperature consistently increases with the presence of boron and zirconium, and shows a significant shift in entropy, ranging from 1.68 to 2.01 J.kg<sup>-1</sup>K<sup>-1</sup> at a magnetic field of 2.5 T. Additionally, it exhibits a noteworthy Relative Cooling Power of 38.76–53.74 J.kg<sup>-1</sup>. The potential of this material as an exceptional low-temperature refrigeration material around room temperature is demonstrated by these outcomes.</div></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"650 ","pages":"Article 123376"},"PeriodicalIF":3.2,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143138291","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-12-27DOI: 10.1016/j.jnoncrysol.2024.123380
Tuo Wang, Qiqi Hou, Yating Zhou, Guanting Liu
In this study, the plasticity of a Zr60Ni25Al15 bulk metallic glass (BMG) was controlled by the static holding time of melt before quenching. It had been found that when the static holding time was 4 min, the Zr60Ni25Al15 BMG had the plasticity of 6.4%, however, when the static holding time was above or less than 4 min, the plasticity would decrease. The main reason for the different plasticity was the oxygen content of Zr60Ni25Al15 BMGs at different static holding times. The appropriate oxygen content led to the blue shift of the valence band spectrum of X-ray photoelectron spectroscopy of Zr60Ni25Al15 BMG. The nanoindentation test indicated that there were more soft regions of the Zr60Ni25Al15 BMG with the static holding time of 4 min compared with the others. The mechanism of the different plasticity of the Zr60Ni25Al15 BMGs under different static holding times was discussed.
{"title":"Tailored plasticity of Zr-based bulk metallic glass by controlling the static holding time of melt before quenching","authors":"Tuo Wang, Qiqi Hou, Yating Zhou, Guanting Liu","doi":"10.1016/j.jnoncrysol.2024.123380","DOIUrl":"10.1016/j.jnoncrysol.2024.123380","url":null,"abstract":"<div><div>In this study, the plasticity of a Zr<sub>60</sub>Ni<sub>25</sub>Al<sub>15</sub> bulk metallic glass (BMG) was controlled by the static holding time of melt before quenching. It had been found that when the static holding time was 4 min, the Zr<sub>60</sub>Ni<sub>25</sub>Al<sub>15</sub> BMG had the plasticity of 6.4%, however, when the static holding time was above or less than 4 min, the plasticity would decrease. The main reason for the different plasticity was the oxygen content of Zr<sub>60</sub>Ni<sub>25</sub>Al<sub>15</sub> BMGs at different static holding times. The appropriate oxygen content led to the blue shift of the valence band spectrum of X-ray photoelectron spectroscopy of Zr<sub>60</sub>Ni<sub>25</sub>Al<sub>15</sub> BMG. The nanoindentation test indicated that there were more soft regions of the Zr<sub>60</sub>Ni<sub>25</sub>Al<sub>15</sub> BMG with the static holding time of 4 min compared with the others. The mechanism of the different plasticity of the Zr<sub>60</sub>Ni<sub>25</sub>Al<sub>15</sub> BMGs under different static holding times was discussed.</div></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"650 ","pages":"Article 123380"},"PeriodicalIF":3.2,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143138289","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-12-24DOI: 10.1016/j.jnoncrysol.2024.123374
Hong Li , Daniel R. Neuville , Jincheng Du , Wenqing Xie
Research of advanced glass fiber in the MgO-CaO-Al2O3-SiO2 (MCAS) system has drawn worldwide attention for more than a decade because of its unique mechanical properties, high modulus, and high strength, for ultralong wind turbine blades. However, challenges remain in processing technology because of its inherent high liquidus temperature. For the first time, we achieved a significant reduction in the liquidus temperature of the MCAS glass using the Li2O modification to the MCAS glass along with the reduction in the melt viscosity. Though being a glass network modifier like other alkali oxides, surprisingly, Li2O in glass further increases MCAS glass fiber sonic modulus. The dual functional roles of Li2O discovered from this study resemble previous findings on rare earth oxides in the MCAS glasses. The current findings are supported by experimental measurements, Raman spectroscopic study, and molecular dynamics simulations.
{"title":"Dual functional roles of lithium oxide in mixed alkaline earth aluminosilicate fiber glasses","authors":"Hong Li , Daniel R. Neuville , Jincheng Du , Wenqing Xie","doi":"10.1016/j.jnoncrysol.2024.123374","DOIUrl":"10.1016/j.jnoncrysol.2024.123374","url":null,"abstract":"<div><div>Research of advanced glass fiber in the MgO-CaO-Al<sub>2</sub>O<sub>3</sub>-SiO<sub>2</sub> (MCAS) system has drawn worldwide attention for more than a decade because of its unique mechanical properties, high modulus, and high strength, for ultralong wind turbine blades. However, challenges remain in processing technology because of its inherent high liquidus temperature. For the first time, we achieved a significant reduction in the liquidus temperature of the MCAS glass using the Li<sub>2</sub>O modification to the MCAS glass along with the reduction in the melt viscosity. Though being a glass network modifier like other alkali oxides, surprisingly, Li<sub>2</sub>O in glass further increases MCAS glass fiber sonic modulus. The dual functional roles of Li<sub>2</sub>O discovered from this study resemble previous findings on rare earth oxides in the MCAS glasses. The current findings are supported by experimental measurements, Raman spectroscopic study, and molecular dynamics simulations.</div></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"650 ","pages":"Article 123374"},"PeriodicalIF":3.2,"publicationDate":"2024-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143138425","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-12-24DOI: 10.1016/j.jnoncrysol.2024.123378
Murat Durandurdu
Through constant-pressure ab initio simulations, we have uncovered high-pressure phase transformations in amorphous indium nitride for the first time. Our results reveal a distinct two-step progression under compression. Initially, a polyamorphic transition occurs, where the low-density amorphous (LDA) phase transforms into a high-density amorphous (HDA) phase. This HDA structure remains stable in some pressure range and then crystallization initiates, leading to a rocksalt configuration. Upon decompression, the HDA phase reverts to an amorphous network with a slightly higher density and coordination number than the initial LDA state.
{"title":"Pressure-driven structural evolution of amorphous InN","authors":"Murat Durandurdu","doi":"10.1016/j.jnoncrysol.2024.123378","DOIUrl":"10.1016/j.jnoncrysol.2024.123378","url":null,"abstract":"<div><div>Through constant-pressure ab initio simulations, we have uncovered high-pressure phase transformations in amorphous indium nitride for the first time. Our results reveal a distinct two-step progression under compression. Initially, a polyamorphic transition occurs, where the low-density amorphous (LDA) phase transforms into a high-density amorphous (HDA) phase. This HDA structure remains stable in some pressure range and then crystallization initiates, leading to a rocksalt configuration. Upon decompression, the HDA phase reverts to an amorphous network with a slightly higher density and coordination number than the initial LDA state.</div></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"650 ","pages":"Article 123378"},"PeriodicalIF":3.2,"publicationDate":"2024-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143138427","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-12-24DOI: 10.1016/j.jnoncrysol.2024.123372
Guanting Liu , Yating Zhou , Shuyan Zhang , Tuo Wang
In this paper, the Fe-based amorphous alloy coatings were fabricated by the high velocity oxygen fuel on the loading direct current of the substrate. It was found that the loading direct current during the process of coating preparation exhibits higher hardness and better friction and wear performance compared with the unloaded direct current one. The reason for the improvement of the mechanical properties is mainly due to the lower porosity. The structure of the coating with the loading direct current is more disordered than that of unloaded. The related mechanism of the improved properties has been also analyzed. This work may provide a new method and a potential application to improve the mechanical properties of amorphous alloy coatings.
{"title":"Improvement of the mechanical properties of Fe-based amorphous alloy coating by the loading direct current","authors":"Guanting Liu , Yating Zhou , Shuyan Zhang , Tuo Wang","doi":"10.1016/j.jnoncrysol.2024.123372","DOIUrl":"10.1016/j.jnoncrysol.2024.123372","url":null,"abstract":"<div><div>In this paper, the Fe-based amorphous alloy coatings were fabricated by the high velocity oxygen fuel on the loading direct current of the substrate. It was found that the loading direct current during the process of coating preparation exhibits higher hardness and better friction and wear performance compared with the unloaded direct current one. The reason for the improvement of the mechanical properties is mainly due to the lower porosity. The structure of the coating with the loading direct current is more disordered than that of unloaded. The related mechanism of the improved properties has been also analyzed. This work may provide a new method and a potential application to improve the mechanical properties of amorphous alloy coatings.</div></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"650 ","pages":"Article 123372"},"PeriodicalIF":3.2,"publicationDate":"2024-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143138319","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-12-21DOI: 10.1016/j.jnoncrysol.2024.123371
R.M. Kershi , F.M. Ali
Polyvinyl alcohol (PVA) films fabricated with dual ions of cerium and lanthanum in the polymer structure nanocomposites [LCPn = (La:Ce:PVA)n]; n = 0, 0.25, 0.5, 1.5, 4 were prepared using the casting method. The nanostructure and structural parameters of the synthesized composites were studied by X-ray diffraction (XRD). The incorporation of lanthanide ions into the polymer structure was confirmed by Fourier transform infrared (FTIR) technique. The interaction between polymer PVA and lanthanides enhanced the optical conductivity and reduced the direct and indirect optical gap values. It also reduced the refractive index values in the ultraviolet region and increased them in the visible region according to the La:Ce ions ratio. The critical concentration of lanthanide ions (La:Ce) added to PVA polymer was 0.25 for the sample named LCP1 and it qualifies for photonic semiconductor applications.
{"title":"The extraordinary effectiveness of duple Lanthanides (La and Ce) elements on the features of PVA nanocomposite films and for potential applications","authors":"R.M. Kershi , F.M. Ali","doi":"10.1016/j.jnoncrysol.2024.123371","DOIUrl":"10.1016/j.jnoncrysol.2024.123371","url":null,"abstract":"<div><div>Polyvinyl alcohol (PVA) films fabricated with dual ions of cerium and lanthanum in the polymer structure nanocomposites [LCPn = (La:Ce:PVA)n]; <em>n</em> = 0, 0.25, 0.5, 1.5, 4 were prepared using the casting method. The nanostructure and structural parameters of the synthesized composites were studied by X-ray diffraction (XRD). The incorporation of lanthanide ions into the polymer structure was confirmed by Fourier transform infrared (FTIR) technique. The interaction between polymer PVA and lanthanides enhanced the optical conductivity and reduced the direct and indirect optical gap values. It also reduced the refractive index values in the ultraviolet region and increased them in the visible region according to the La:Ce ions ratio. The critical concentration of lanthanide ions (La:Ce) added to PVA polymer was 0.25 for the sample named LCP1 and it qualifies for photonic semiconductor applications.</div></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"650 ","pages":"Article 123371"},"PeriodicalIF":3.2,"publicationDate":"2024-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143138316","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-12-21DOI: 10.1016/j.jnoncrysol.2024.123375
Sourav Sahoo , Vernika Gautam , N. M. Anoop Krishnan , Nitya Nand Gosvami
Adding to the inferior mechanical performance, scratches on glasses compromise their service life and optical functionalities. Here, we demonstrate that coating large-area generic glass surfaces with protective graphene oxide (GO) films results in superior scratch resistance. To this extent, we employ an aqueous dispersion of GO as a precursor to deposit films on soda-lime-silica glass via manual smearing. Further, through macroscale reciprocating scratch tests, we observe that the GO depositions substantially minimize the friction by ∼67 % while being thin enough to negligibly affect the optical transparency. Moreover, the postmortem wear analysis confirms the mitigated abrasion and plastic deformation of the glass in conjunction with the interfacial GO films. Thus, the present work demonstrates a promising and scalable approach toward enhancing the scratch resistance of glasses with dispersion-derived two-dimensional materials.
{"title":"Macroscale scratch-resistant glasses with large-area graphene oxide depositions","authors":"Sourav Sahoo , Vernika Gautam , N. M. Anoop Krishnan , Nitya Nand Gosvami","doi":"10.1016/j.jnoncrysol.2024.123375","DOIUrl":"10.1016/j.jnoncrysol.2024.123375","url":null,"abstract":"<div><div>Adding to the inferior mechanical performance, scratches on glasses compromise their service life and optical functionalities. Here, we demonstrate that coating large-area generic glass surfaces with protective graphene oxide (GO) films results in superior scratch resistance. To this extent, we employ an aqueous dispersion of GO as a precursor to deposit films on soda-lime-silica glass via manual smearing. Further, through macroscale reciprocating scratch tests, we observe that the GO depositions substantially minimize the friction by ∼67 % while being thin enough to negligibly affect the optical transparency. Moreover, the postmortem wear analysis confirms the mitigated abrasion and plastic deformation of the glass in conjunction with the interfacial GO films. Thus, the present work demonstrates a promising and scalable approach toward enhancing the scratch resistance of glasses with dispersion-derived two-dimensional materials.</div></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"650 ","pages":"Article 123375"},"PeriodicalIF":3.2,"publicationDate":"2024-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143138317","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-12-20DOI: 10.1016/j.jnoncrysol.2024.123370
Hongqi Shi , Yang Xu , Guangxian Liang , Jianming Zhan , Jiajia Chen , Xinnian Guo
Zr-based bulk metallic glasses (BMGs) hold great promise as engineering materials, owing to their exceptional strength and remarkable corrosion resistance. However, in the ZrCuAlFe system, which exhibits limited glass-forming ability (GFA), enhancing corrosion resistance further is crucial to meet stringent industrial standards. This study focuses on the preparation of a series of Zr65Cu20Al10-xFe5Tax (x = 0–2.5 atomic percent) BMGs through arc melting. We systematically investigate how the incorporation of Ta influences the GFA, mechanical properties, and corrosion resistance of these as-cast alloys. Our findings reveal that a small amount of Ta addition can significantly enhance both the room-temperature plasticity and corrosion resistance of these alloys in a 3.5% NaCl solution. Specifically, compression tests suggest that when 1.5 atomic percent of Ta is added, the room-temperature plasticity of the alloy enhances from 1.13% in the as-cast state to 5.49%, while the fracture strength increases from 1264.2 MPa to 1511 MPa. Additionally, electrochemical tests demonstrate that the alloy with 1.5 atomic percent Ta addition displays the widest passivation range (0.604 V) and the lowest self-corrosion current density (1.16 × 10–7 A·cm-2). In conclusion, our results provide valuable theoretical insights into the effects of Ta addition on the mechanical properties and corrosion resistance of Zr-based BMGs, thereby offering guidance for their potential engineering applications.
{"title":"Enhancing mechanical properties and corrosion resistance of Zr-based bulk metallic glasses by Ta addition","authors":"Hongqi Shi , Yang Xu , Guangxian Liang , Jianming Zhan , Jiajia Chen , Xinnian Guo","doi":"10.1016/j.jnoncrysol.2024.123370","DOIUrl":"10.1016/j.jnoncrysol.2024.123370","url":null,"abstract":"<div><div>Zr-based bulk metallic glasses (BMGs) hold great promise as engineering materials, owing to their exceptional strength and remarkable corrosion resistance. However, in the ZrCuAlFe system, which exhibits limited glass-forming ability (GFA), enhancing corrosion resistance further is crucial to meet stringent industrial standards. This study focuses on the preparation of a series of Zr<sub>65</sub>Cu<sub>20</sub>Al<sub>10-x</sub>Fe<sub>5</sub>Ta<sub>x</sub> (<em>x</em> = 0–2.5 atomic percent) BMGs through arc melting. We systematically investigate how the incorporation of Ta influences the GFA, mechanical properties, and corrosion resistance of these as-cast alloys. Our findings reveal that a small amount of Ta addition can significantly enhance both the room-temperature plasticity and corrosion resistance of these alloys in a 3.5% NaCl solution. Specifically, compression tests suggest that when 1.5 atomic percent of Ta is added, the room-temperature plasticity of the alloy enhances from 1.13% in the as-cast state to 5.49%, while the fracture strength increases from 1264.2 MPa to 1511 MPa. Additionally, electrochemical tests demonstrate that the alloy with 1.5 atomic percent Ta addition displays the widest passivation range (0.604 V) and the lowest self-corrosion current density (1.16 × 10<sup>–7</sup> A·cm<sup>-2</sup>). In conclusion, our results provide valuable theoretical insights into the effects of Ta addition on the mechanical properties and corrosion resistance of Zr-based BMGs, thereby offering guidance for their potential engineering applications.</div></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"650 ","pages":"Article 123370"},"PeriodicalIF":3.2,"publicationDate":"2024-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143138315","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-12-19DOI: 10.1016/j.jnoncrysol.2024.123367
M. AL-Zaibani , R.A. Althobiti , E.F. El Agammy , Eman Alzahrani , G. El-Damrawi , H. Doweidar , A.A. Al-Muntaser
The glasses of the formula 10ZnO.xNa2O.(90-x)B2O3, 25ZnO.xNa2O.(75-x)B2O,xZnO.10Na2O.(90-x)B2O3, and xZnO.25Na2O.(75-x)B2O3 were prepared using melt quenching method. The prepared glasses were characterized using FTIR, Dc conductivity, density and molar volume techniques. The Dc conductivity results indicate that the conduction in studied glasses strongly depends on Na2O content/or N (number of Na+ ions per cm3). The linear dependence of conductivity on mobility of Na+ ions, reveals that mobility is a basic parameter that determines conductivity and activation energy in all studied glasses. The structural analysis and the conduction results indicate that the mobility is dominated by N the number of Na+ ions per cm3, which depends on the concentration (x) of Na2O and the free volume. Regardless of composition, Dc conductivity, mobility, and activation energy showed a unique dependence on N number of Na+ ions per unit volume in all studied glasses.
{"title":"Electrical conduction in ternary Na2O-ZnO-B2O3 glasses; a unique dependence on the mobility of Na+ ions as main charge carriers","authors":"M. AL-Zaibani , R.A. Althobiti , E.F. El Agammy , Eman Alzahrani , G. El-Damrawi , H. Doweidar , A.A. Al-Muntaser","doi":"10.1016/j.jnoncrysol.2024.123367","DOIUrl":"10.1016/j.jnoncrysol.2024.123367","url":null,"abstract":"<div><div>The glasses of the formula 10ZnO.<em>x</em>Na<sub>2</sub>O.(90-<em>x</em>)B<sub>2</sub>O<sub>3</sub>, 25ZnO.<em>x</em>Na<sub>2</sub>O.(75-<em>x</em>)B<sub>2</sub>O<sub>,</sub> <em>x</em>ZnO.10Na<sub>2</sub>O.(90-<em>x</em>)B<sub>2</sub>O<sub>3</sub>, and <em>x</em>ZnO.25Na<sub>2</sub>O.(75-<em>x</em>)B<sub>2</sub>O<sub>3</sub> were prepared using melt quenching method. The prepared glasses were characterized using FTIR, Dc conductivity, density and molar volume techniques. The Dc conductivity results indicate that the conduction in studied glasses strongly depends on Na<sub>2</sub>O content/or N (number of Na<sup>+</sup> ions per cm<sup>3</sup>). The linear dependence of conductivity on mobility of Na<sup>+</sup> ions, reveals that mobility is a basic parameter that determines conductivity and activation energy in all studied glasses. The structural analysis and the conduction results indicate that the mobility is dominated by N the number of Na<sup>+</sup> ions per cm<sup>3</sup>, which depends on the concentration (x) of Na<sub>2</sub>O and the free volume. Regardless of composition, Dc conductivity, mobility, and activation energy showed a unique dependence on N number of Na<sup>+</sup> ions per unit volume in all studied glasses.</div></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"650 ","pages":"Article 123367"},"PeriodicalIF":3.2,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143138313","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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