Pub Date : 2025-12-12DOI: 10.1016/j.jnoncrysol.2025.123917
Xiangyang Peng , Qing Du , Shuo Hou , Peipei Cao , Ziyi Li , Xianzhen Wang , Lihong Zhai , Guangyao Lu , Yuan Wu , Xiongjun Liu
Fe-based metallic glasses exhibit high strength and hardness, as well as excellent wear and corrosion resistance, demonstrating significant potential as protective coatings in energy and chemical industries. Among various coating-preparation methods, high-velocity oxygen fuel (HVOF) spraying is widely used due to its ability to achieve high amorphous content and dense coatings. Spraying conditions in the HVOF process, particularly the gun length, significantly affect the phases and microstructure of the coating. In this study, three Fe50.5Cr19Mo9Si1C12.5B8 amorphous coatings were prepared by varying the gun length. XRD, DSC, and SEM analyses were conducted to investigate differences in coating microstructure, phase distribution, and thermal stability. The evolution of bond strength and coating hardness was attributed to coating porosity and carbide content, both of which are influenced by superheating during the spraying process. This study provides guidance for optimizing the preparation of Fe-based amorphous coatings.
{"title":"Enhancing microstructure and mechanical properties of Fe-based amorphous coatings via optimized HVOF processing","authors":"Xiangyang Peng , Qing Du , Shuo Hou , Peipei Cao , Ziyi Li , Xianzhen Wang , Lihong Zhai , Guangyao Lu , Yuan Wu , Xiongjun Liu","doi":"10.1016/j.jnoncrysol.2025.123917","DOIUrl":"10.1016/j.jnoncrysol.2025.123917","url":null,"abstract":"<div><div>Fe-based metallic glasses exhibit high strength and hardness, as well as excellent wear and corrosion resistance, demonstrating significant potential as protective coatings in energy and chemical industries. Among various coating-preparation methods, high-velocity oxygen fuel (HVOF) spraying is widely used due to its ability to achieve high amorphous content and dense coatings. Spraying conditions in the HVOF process, particularly the gun length, significantly affect the phases and microstructure of the coating. In this study, three Fe<sub>50.5</sub>Cr<sub>19</sub>Mo<sub>9</sub>Si<sub>1</sub>C<sub>12.5</sub>B<sub>8</sub> amorphous coatings were prepared by varying the gun length. XRD, DSC, and SEM analyses were conducted to investigate differences in coating microstructure, phase distribution, and thermal stability. The evolution of bond strength and coating hardness was attributed to coating porosity and carbide content, both of which are influenced by superheating during the spraying process. This study provides guidance for optimizing the preparation of Fe-based amorphous coatings.</div></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"674 ","pages":"Article 123917"},"PeriodicalIF":3.5,"publicationDate":"2025-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145749080","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 : 2025-12-12DOI: 10.1016/j.jnoncrysol.2025.123902
Kai Wang , Guan Zhang , Xueru Fan , Dongmei Zhao , Lei Xie , Jianping Zhou , Yong Huang , Lei Che , Tiezhen Ren
This study designed and fabricated a new Ni40Zr28.5Ti16.5Al10Cu5-XSiX (X = 0, 0.5, 1, 1.5, 2, denoted as Si0, Si0.5, Si1, Si1.5, and Si2, respectively) bulk metallic glass (BMGs). It systematically investigated the effects of trace Si addition on the microhardness, compressive mechanical properties, and serrated flow behavior of this Ni-based BMGs. Mechanical testing revealed that at the optimal Si content (X = 1.5 at. %), the Ni-based BMG achieved a microhardness of 860 HV1, along with a yield strength of 3154 MPa and a plastic strain of 13.9 %. Statistical analysis of stress drop data showed that their distribution exhibited a significant monotonically decreasing trend, conforming to a power-law distribution, suggesting the alloy was in a self-organized critical (SOC) state. High-resolution transmission electron microscopy (HRTEM) characterization revealed that Si addition promoted the formation of icosahedral clusters and short-range order (SRO) structures. These structures act as pinning points, inducing branching and intersection of shear bands and effectively inhibiting their propagation, thereby significantly enhancing the plastic deformation capability of the alloy.
{"title":"Effect of Si addition on mechanical properties of Ni40Zr28.5Ti16.5Al10Cu5 bulk metallic glasses","authors":"Kai Wang , Guan Zhang , Xueru Fan , Dongmei Zhao , Lei Xie , Jianping Zhou , Yong Huang , Lei Che , Tiezhen Ren","doi":"10.1016/j.jnoncrysol.2025.123902","DOIUrl":"10.1016/j.jnoncrysol.2025.123902","url":null,"abstract":"<div><div>This study designed and fabricated a new Ni<sub>40</sub>Zr<sub>28.5</sub>Ti<sub>16.5</sub>Al<sub>10</sub>Cu<sub>5-X</sub>Si<sub>X</sub> (<em>X</em> = 0, 0.5, 1, 1.5, 2, denoted as Si0, Si0.5, Si1, Si1.5, and Si2, respectively) bulk metallic glass (BMGs). It systematically investigated the effects of trace Si addition on the microhardness, compressive mechanical properties, and serrated flow behavior of this Ni-based BMGs. Mechanical testing revealed that at the optimal Si content (<em>X</em> = 1.5 at. %), the Ni-based BMG achieved a microhardness of 860 HV<sub>1</sub>, along with a yield strength of 3154 MPa and a plastic strain of 13.9 %. Statistical analysis of stress drop data showed that their distribution exhibited a significant monotonically decreasing trend, conforming to a power-law distribution, suggesting the alloy was in a self-organized critical (SOC) state. High-resolution transmission electron microscopy (HRTEM) characterization revealed that Si addition promoted the formation of icosahedral clusters and short-range order (SRO) structures. These structures act as pinning points, inducing branching and intersection of shear bands and effectively inhibiting their propagation, thereby significantly enhancing the plastic deformation capability of the alloy.</div></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"674 ","pages":"Article 123902"},"PeriodicalIF":3.5,"publicationDate":"2025-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145749074","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 : 2025-12-11DOI: 10.1016/j.jnoncrysol.2025.123913
Changjian Wang , Yujie Liu , Xingze Chen , Xianping Fan , Xvsheng Qiao , Qun Luo , Hai Guo
Spectral conversion technology provides an effective way to solve the spectral mismatch of solar cells by harvesting extra photons out of the response region. In this work, an Eu2+-doped fluorochlorosilicate glass was developed as a spectral conversion material. A dual compositional tuning strategy, involving the adjustment of the Cl−/F− and Al2O3/La2O3 ratios, was employed to optimize the transmittance, luminescence, and mechanical properties. The optimized glass exhibits a high external quantum yield exceeding 50%, visible light transmittance over 90%, and improved mechanical robustness. When applied as a spectral conversion layer in organic solar cells (OSCs), the glass enhanced the power conversion efficiency (PCE) from a reference value of 12.88% to 13.63%, for a relative enhancement of approximately 5.5%. These results suggest that this glass is a promising spectral conversion material for improving the performance of OSCs.
{"title":"Eu2+-doped fluorochlorosilicate transparent spectral conversion glass","authors":"Changjian Wang , Yujie Liu , Xingze Chen , Xianping Fan , Xvsheng Qiao , Qun Luo , Hai Guo","doi":"10.1016/j.jnoncrysol.2025.123913","DOIUrl":"10.1016/j.jnoncrysol.2025.123913","url":null,"abstract":"<div><div>Spectral conversion technology provides an effective way to solve the spectral mismatch of solar cells by harvesting extra photons out of the response region. In this work, an Eu<sup>2+</sup>-doped fluorochlorosilicate glass was developed as a spectral conversion material. A dual compositional tuning strategy, involving the adjustment of the Cl<sup>−</sup>/<em>F</em><sup>−</sup> and Al<sub>2</sub>O<sub>3</sub>/La<sub>2</sub>O<sub>3</sub> ratios, was employed to optimize the transmittance, luminescence, and mechanical properties. The optimized glass exhibits a high external quantum yield exceeding 50%, visible light transmittance over 90%, and improved mechanical robustness. When applied as a spectral conversion layer in organic solar cells (OSCs), the glass enhanced the power conversion efficiency (PCE) from a reference value of 12.88% to 13.63%, for a relative enhancement of approximately 5.5%. These results suggest that this glass is a promising spectral conversion material for improving the performance of OSCs.</div></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"674 ","pages":"Article 123913"},"PeriodicalIF":3.5,"publicationDate":"2025-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145749075","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}
A soft magnetic amorphous alloy Co58Ni10Fe5B11Si16 was designed based on empirical rules using the analysis of thermodynamic and structural parameters. The alloys were produced by melt quenching on a rotating copper wheel in the form of ribbons, parameterized by rotation speeds of 18 m/s and 28 m/s. Investigations were conducted both in the as-quenched state and after high-temperature annealing using methods of differential scanning calorimetry, X-ray diffraction, transmission electron microscope and vibrating sample magnetometer. Comprehensive analysis revealed differences in the nature of structural ordering, properties, and the scenario of structural relaxation of Co58Ni10Fe5B11Si16 ribbons spun at different quenching rates.
{"title":"Effect of quenching rate and annealing time on the microstructure and soft magnetic properties of rapidly quenched Co58Ni10Fe5B11Si16 amorphous alloy","authors":"K.E. Pinchuk, V.V. Tkachev, G.S. Kraynova, A.M. Frolov, I.M. Sapovskii, T.R. Rakhmatullaev, V.S. Plotnikov","doi":"10.1016/j.jnoncrysol.2025.123918","DOIUrl":"10.1016/j.jnoncrysol.2025.123918","url":null,"abstract":"<div><div>A soft magnetic amorphous alloy Co<sub>58</sub>Ni<sub>10</sub>Fe<sub>5</sub>B<sub>11</sub>Si<sub>16</sub> was designed based on empirical rules using the analysis of thermodynamic and structural parameters. The alloys were produced by melt quenching on a rotating copper wheel in the form of ribbons, parameterized by rotation speeds of 18 m/s and 28 m/s. Investigations were conducted both in the as-quenched state and after high-temperature annealing using methods of differential scanning calorimetry, X-ray diffraction, transmission electron microscope and vibrating sample magnetometer. Comprehensive analysis revealed differences in the nature of structural ordering, properties, and the scenario of structural relaxation of Co<sub>58</sub>Ni<sub>10</sub>Fe<sub>5</sub>B<sub>11</sub>Si<sub>16</sub> ribbons spun at different quenching rates.</div></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"674 ","pages":"Article 123918"},"PeriodicalIF":3.5,"publicationDate":"2025-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145749073","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 : 2025-12-10DOI: 10.1016/j.jnoncrysol.2025.123916
Yue Mi , Cong Ao , Qingyang Shen , Zhehui Sun , Qinghuang Zhang , Binchang Zhang , Lixiong Han , Jun Xie , Dehua Xiong
This study investigated the effects of the Mg/B mass ratio on the structure, high-temperature rheological behavior, and dielectric properties of MgO-Al2O3-B2O3-SiO2 based boron aluminosilicate glass. The results indicated that after the substitution of B2O3 for MgO, the contents of both [BO3] and [BO4] units increased; however, the dominant coordination gradually shifted from [BO4] to [BO3]. Notably, variations in the Mg/B ratio significantly altered the coordination environment of Al3+, leading to an increase in the content of [AlO5] units from 28.80 % to 45.11 %. These structural changes resulted in an increased degree of polymerization but a weakened network rigidity. Consequently, the coefficient of thermal expansion (CTE), glass transition temperature (Tg), flexural strength, dielectric constant, and dielectric loss were all reduced. At an optimized Mg/B mass ratio of 0.12, the glass sample exhibited a favorable combination of dielectric properties (dielectric constant = 4.48 @10 GHz, dielectric loss = 2.0 × 10–3 @10 GHz) and a low fiber drawing temperature (1301 °C), which is suitable for the production of glass fibers.
{"title":"Effect of B2O3 on the structure and properties of low-dielectric boron aluminosilicate glass used for glass fibers","authors":"Yue Mi , Cong Ao , Qingyang Shen , Zhehui Sun , Qinghuang Zhang , Binchang Zhang , Lixiong Han , Jun Xie , Dehua Xiong","doi":"10.1016/j.jnoncrysol.2025.123916","DOIUrl":"10.1016/j.jnoncrysol.2025.123916","url":null,"abstract":"<div><div>This study investigated the effects of the Mg/B mass ratio on the structure, high-temperature rheological behavior, and dielectric properties of MgO-Al<sub>2</sub>O<sub>3</sub>-B<sub>2</sub>O<sub>3</sub>-SiO<sub>2</sub> based boron aluminosilicate glass. The results indicated that after the substitution of B<sub>2</sub>O<sub>3</sub> for MgO, the contents of both [BO<sub>3</sub>] and [BO<sub>4</sub>] units increased; however, the dominant coordination gradually shifted from [BO<sub>4</sub>] to [BO<sub>3</sub>]. Notably, variations in the Mg/B ratio significantly altered the coordination environment of Al<sup>3+</sup>, leading to an increase in the content of [AlO<sub>5</sub>] units from 28.80 % to 45.11 %. These structural changes resulted in an increased degree of polymerization but a weakened network rigidity. Consequently, the coefficient of thermal expansion (CTE), glass transition temperature (T<sub>g</sub>), flexural strength, dielectric constant, and dielectric loss were all reduced. At an optimized Mg/B mass ratio of 0.12, the glass sample exhibited a favorable combination of dielectric properties (dielectric constant = 4.48 @10 GHz, dielectric loss = 2.0 × 10<sup>–3</sup> @10 GHz) and a low fiber drawing temperature (1301 °C), which is suitable for the production of glass fibers.</div></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"674 ","pages":"Article 123916"},"PeriodicalIF":3.5,"publicationDate":"2025-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145749076","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 : 2025-12-10DOI: 10.1016/j.jnoncrysol.2025.123914
Ivone Regina de Oliveira , Isabela dos Santos Gonçalves , Julia Marinzeck de Alcantara Abdala , Bianca Lapadula Heckert Franklin de Abreu , Gustavo Luiz Bueno Cardoso , Gilmar Patrocínio Thim , Tiago Moreira Bastos Campos
Bioactive glasses are recognized for their ability to release ions and induce apatite formation in physiological media. However, conventional glasses often cause a marked increase in pH during dissolution, which may lead to cytotoxic effects. In this study, chlorinated bioactive glasses were synthesized via a hydrolytic sol–gel route using tetraethyl orthosilicate (TEOS) and calcium chloride, aiming to obtain materials with efficient ionic release and controlled pH response. Samples were thermally treated at 500 °C, 600 °C, and 700 °C and characterized by FTIR, Raman spectroscopy, specific surface area (BET), scanning electron microscopy (SEM), and ionic release tests. The chlorinated bioactive glass calcined at 500 °C exhibited the most promising combination of characteristics: presence of hydroxyl groups (–OH), a structure predominantly composed of Q² units, high specific surface area (31.75 m² g⁻¹), well-defined mesoporosity, high ionic release (∼2000 µS cm⁻¹), and effective control of pH increase in aqueous media. These properties directly contribute to bioactivity and indicate that this material can be incorporated into biomedical formulations without the need for prior neutralization steps, in contrast to many conventional bioactive glasses. The results also demonstrate that the hydrolytic sol–gel route enables the synthesis of chlorinated bioactive glasses with tunable structure and dissolution profiles, overcoming limitations associated with more complex routes, such as those based on ion-exchange resins or precursors like metasilicate. The ability to combine high ionic release with low impact on pH represents a relevant advance in the design of bioceramics for regenerative and dental applications.
{"title":"Hydrolytically synthesized chlorinated bioactive glasses: Structural reticulation and controlled ion release without alkaline shift","authors":"Ivone Regina de Oliveira , Isabela dos Santos Gonçalves , Julia Marinzeck de Alcantara Abdala , Bianca Lapadula Heckert Franklin de Abreu , Gustavo Luiz Bueno Cardoso , Gilmar Patrocínio Thim , Tiago Moreira Bastos Campos","doi":"10.1016/j.jnoncrysol.2025.123914","DOIUrl":"10.1016/j.jnoncrysol.2025.123914","url":null,"abstract":"<div><div>Bioactive glasses are recognized for their ability to release ions and induce apatite formation in physiological media. However, conventional glasses often cause a marked increase in pH during dissolution, which may lead to cytotoxic effects. In this study, chlorinated bioactive glasses were synthesized via a hydrolytic sol–gel route using tetraethyl orthosilicate (TEOS) and calcium chloride, aiming to obtain materials with efficient ionic release and controlled pH response. Samples were thermally treated at 500 °C, 600 °C, and 700 °C and characterized by FTIR, Raman spectroscopy, specific surface area (BET), scanning electron microscopy (SEM), and ionic release tests. The chlorinated bioactive glass calcined at 500 °C exhibited the most promising combination of characteristics: presence of hydroxyl groups (–OH), a structure predominantly composed of Q² units, high specific surface area (31.75 m² g⁻¹), well-defined mesoporosity, high ionic release (∼2000 µS cm⁻¹), and effective control of pH increase in aqueous media. These properties directly contribute to bioactivity and indicate that this material can be incorporated into biomedical formulations without the need for prior neutralization steps, in contrast to many conventional bioactive glasses. The results also demonstrate that the hydrolytic sol–gel route enables the synthesis of chlorinated bioactive glasses with tunable structure and dissolution profiles, overcoming limitations associated with more complex routes, such as those based on ion-exchange resins or precursors like metasilicate. The ability to combine high ionic release with low impact on pH represents a relevant advance in the design of bioceramics for regenerative and dental applications.</div></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"674 ","pages":"Article 123914"},"PeriodicalIF":3.5,"publicationDate":"2025-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145749077","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 : 2025-12-10DOI: 10.1016/j.jnoncrysol.2025.123915
Jinfeng Liu , Yaqiong Liang , Guoliang Xu , Fu Wang , Qilong Liao , Jing Wang , Jun Zhang , Junwei Dong , Guanghua Li , Yunlong Luo , Huachao He , Caijun Zhou
This study systematically investigates the effects of substituting SiO2 with the network formers B2O3 and P2O5 on the melting behavior, structure, optical performance and chemical strengthening properties of the SiO2-Al2O3Na2O-K2O-MgO glass system. In-situ melting experiments enable real-time observation of bubble nucleation, migration, and elimination during glass melting, revealing the dynamic evolution process. The result shows that adding the clarifying agent Na2SO4·10H2O promoted the formation of large bubbles in the glass melt and significantly reduced bubble elimination time. The addition of B2O3 reduces the melt viscosity and melting temperature, thereby accelerating bubble removal. In contrast, the addition of P2O5 makes it difficult to eliminate bubbles. XRD analysis reveale that the NaAlSiO4 crystal phase formed when the P2O5 content was 3 mol%, and that the transmittance in the 320–500 nm range is approximately 0.6 % lower than that the other samples. FSM-6000LE results indicate that with the content of B2O3 increase, surface compressive stress (CS) increase, while depth of layer (DOL) decrease. However, with the increase of P2O5, the CS decrease and DOL increase. In conclusion, this paper provides a theoretical basis for optimizing the melting process and properties of high-alumina-silicate glass.
{"title":"The effect of B2O3 and P2O5 in bubble evolution and property modulation of high-alumina-silicate glass","authors":"Jinfeng Liu , Yaqiong Liang , Guoliang Xu , Fu Wang , Qilong Liao , Jing Wang , Jun Zhang , Junwei Dong , Guanghua Li , Yunlong Luo , Huachao He , Caijun Zhou","doi":"10.1016/j.jnoncrysol.2025.123915","DOIUrl":"10.1016/j.jnoncrysol.2025.123915","url":null,"abstract":"<div><div>This study systematically investigates the effects of substituting SiO<sub>2</sub> with the network formers B<sub>2</sub>O<sub>3</sub> and P<sub>2</sub>O<sub>5</sub> on the melting behavior, structure, optical performance and chemical strengthening properties of the SiO<sub>2</sub>-Al<sub>2</sub>O<sub>3<img></sub>Na<sub>2</sub>O-K<sub>2</sub>O-MgO glass system. In-situ melting experiments enable real-time observation of bubble nucleation, migration, and elimination during glass melting, revealing the dynamic evolution process. The result shows that adding the clarifying agent Na<sub>2</sub>SO<sub>4</sub>·10H<sub>2</sub>O promoted the formation of large bubbles in the glass melt and significantly reduced bubble elimination time. The addition of B<sub>2</sub>O<sub>3</sub> reduces the melt viscosity and melting temperature, thereby accelerating bubble removal. In contrast, the addition of P<sub>2</sub>O<sub>5</sub> makes it difficult to eliminate bubbles. XRD analysis reveale that the NaAlSiO<sub>4</sub> crystal phase formed when the P<sub>2</sub>O<sub>5</sub> content was 3 mol%, and that the transmittance in the 320–500 nm range is approximately 0.6 % lower than that the other samples. FSM-6000LE results indicate that with the content of B<sub>2</sub>O<sub>3</sub> increase, surface compressive stress (CS) increase, while depth of layer (DOL) decrease. However, with the increase of P<sub>2</sub>O<sub>5</sub>, the CS decrease and DOL increase. In conclusion, this paper provides a theoretical basis for optimizing the melting process and properties of high-alumina-silicate glass.</div></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"674 ","pages":"Article 123915"},"PeriodicalIF":3.5,"publicationDate":"2025-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145749079","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 : 2025-12-07DOI: 10.1016/j.jnoncrysol.2025.123904
Tao Li , Chen Su , Pengcheng Zhang , Siming Xiao , Yifan Ruan , Shengfeng Guo
MoCoB bulk metallic glass (BMG) exhibits very high thermal stability and outstanding mechanical properties. However, their wide applications are still limited due to the poor glass forming ability (GFA) and critical preparing conditions, particularly the need for low oxygen content. This study systematically investigated the effects of oxygen on the properties of MoCoB BMG. A small amount of oxygen incorporation (≤1064 ppm) significantly enhanced the GFA, increasing the critical diameter from 1.2 mm to 2 mm, due to a reduced thermodynamic driving force for crystallization. Moreover, the addition of 676 ppm oxygen simultaneously improves the mechanical properties of MoCoB BMG with the microhardness of 1347 HV, compressive strength of above 5000 MPa, nanohardness of 19 GPa, and Young's modulus of 300 GPa through strengthening local chemical bonds by the addition of oxygen. The high-oxygen-content specimens (2111 ppm) show exceptional corrosion resistance with a self-corrosion current density of 1.259 × 10–7A/cm2 in 3.5 wt. % NaCl solution. This can be attributed to the formation of a denser CoMoO4 composite oxide layer and suppression of passive film dissolution. These findings could provide a comprehensive understanding of the effects of oxygen on the BMGs, and help with the development of high-performance and cost-effective Mo-based BMGs.
{"title":"Effect of oxygen on the glass forming ability, mechanical properties and corrosion resistance of Mo-based bulk metallic glass","authors":"Tao Li , Chen Su , Pengcheng Zhang , Siming Xiao , Yifan Ruan , Shengfeng Guo","doi":"10.1016/j.jnoncrysol.2025.123904","DOIUrl":"10.1016/j.jnoncrysol.2025.123904","url":null,"abstract":"<div><div>MoCoB bulk metallic glass (BMG) exhibits very high thermal stability and outstanding mechanical properties. However, their wide applications are still limited due to the poor glass forming ability (GFA) and critical preparing conditions, particularly the need for low oxygen content. This study systematically investigated the effects of oxygen on the properties of MoCoB BMG. A small amount of oxygen incorporation (≤1064 ppm) significantly enhanced the GFA, increasing the critical diameter from 1.2 mm to 2 mm, due to a reduced thermodynamic driving force for crystallization. Moreover, the addition of 676 ppm oxygen simultaneously improves the mechanical properties of MoCoB BMG with the microhardness of 1347 HV, compressive strength of above 5000 MPa, nanohardness of 19 GPa, and Young's modulus of 300 GPa through strengthening local chemical bonds by the addition of oxygen. The high-oxygen-content specimens (2111 ppm) show exceptional corrosion resistance with a self-corrosion current density of 1.259 × 10<sup>–7</sup>A/cm<sup>2</sup> in 3.5 wt. % NaCl solution. This can be attributed to the formation of a denser CoMoO<sub>4</sub> composite oxide layer and suppression of passive film dissolution. These findings could provide a comprehensive understanding of the effects of oxygen on the BMGs, and help with the development of high-performance and cost-effective Mo-based BMGs.</div></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"674 ","pages":"Article 123904"},"PeriodicalIF":3.5,"publicationDate":"2025-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145749078","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 : 2025-12-06DOI: 10.1016/j.jnoncrysol.2025.123903
S. Zhang , H.Y. Song , M.R. An
Rare earth (RE) alloying critically enhances Mg alloys, yet the atomistic origins of RE-driven strengthening mechanism remain elusive. Through hybrid molecular dynamics/Monte Carlo simulations, we investigate the impact of the Y concentration, short-range ordering (SRO), and temperature on the mechanical properties of the Mg alloys, specifically revealing the interaction mechanism between SRO structures and dislocation. Results demonstrate that Y solutes preferentially form localized SRO structures, which are beneficial for promoting the solid-state amorphization of the alloys. As Y concentration increases, the dominant strengthening mechanism shifts from conventional solid solution strengthening to a synergistic interplay of solid solution strengthening and SRO-induced local amorphization — elevating critical resolved shear stress by up to 50 % versus random solid solutions. Crucially, the SRO structures suppress dislocation glide via atomic-scale pinning. Furthermore, the mechanical properties of the alloys containing SRO exhibit anomalous temperature sensitivity due to the temperature-dependent stability of the SRO structures. These findings provide fundamental insights for designing advanced high-performance Mg alloys.
{"title":"Unraveling the impact of short-range ordering on the strengthening mechanisms in Mg-Y Alloys","authors":"S. Zhang , H.Y. Song , M.R. An","doi":"10.1016/j.jnoncrysol.2025.123903","DOIUrl":"10.1016/j.jnoncrysol.2025.123903","url":null,"abstract":"<div><div>Rare earth (RE) alloying critically enhances Mg alloys, yet the atomistic origins of RE-driven strengthening mechanism remain elusive. Through hybrid molecular dynamics/Monte Carlo simulations, we investigate the impact of the Y concentration, short-range ordering (SRO), and temperature on the mechanical properties of the Mg alloys, specifically revealing the interaction mechanism between SRO structures and dislocation. Results demonstrate that Y solutes preferentially form localized SRO structures, which are beneficial for promoting the solid-state amorphization of the alloys. As Y concentration increases, the dominant strengthening mechanism shifts from conventional solid solution strengthening to a synergistic interplay of solid solution strengthening and SRO-induced local amorphization — elevating critical resolved shear stress by up to 50 % versus random solid solutions. Crucially, the SRO structures suppress dislocation glide via atomic-scale pinning. Furthermore, the mechanical properties of the alloys containing SRO exhibit anomalous temperature sensitivity due to the temperature-dependent stability of the SRO structures. These findings provide fundamental insights for designing advanced high-performance Mg alloys.</div></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"674 ","pages":"Article 123903"},"PeriodicalIF":3.5,"publicationDate":"2025-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145692942","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 : 2025-12-03DOI: 10.1016/j.jnoncrysol.2025.123890
Weiwei Wang , Hui Yan , Xin Cao , Jiwen Jiang , Junfei Liu , Shou Peng
In this study, a series of novel lead-free Bi2O3–B2O3–ZnO–BaO–CuO low-melting glasses with varying content of CuO were prepared, and these matrix glass powder were then used to form composite glass with varying additions of β-eucryptite. The effects of the content of CuO and β-eucryptite on the structure, thermal properties, sealing performance and microstructure of the low-melting glasses were investigated. Structural analysis indicates that the glasses were composed of [BiO3], [BiO6], [BO3] and [BO4] basic units, and the amounts of [BiO3] and [BiO6] units decreased with increasing content of CuO, while the transformation of [BO4] to [BO3] led to a gradual increase in the amount of [BO3], which loosened the glass structure. The coefficient of thermal expansion (CTE) of the glasses gradually increased, while the characteristic temperature (Tg and Td) and sealing temperature showed the opposite trend. The results also indicated that the CTE of the composite glasses decreased significantly with an increase in the external addition of β-eucryptite, and the sealing temperature did not increase substantially. Optimal comprehensive performance was observed at a β-eucryptite content of 6 %, resulting in a lower CTE of 87 × 10–7 / °C and sealing temperature of 415 °C. Following sealing, the factors affecting the sealing strength and fracture mechanism of the sealing glasses were examined. The composite glasses are well-suitable as sealing materials for vacuum glazing, meeting the requirements for low-melting sealing glass and exhibiting a favorable market prospect.
{"title":"Effects of CuO and β-eucyptite on the structure, properties and fracture mechanism of a low-melting glass for vacuum glazing","authors":"Weiwei Wang , Hui Yan , Xin Cao , Jiwen Jiang , Junfei Liu , Shou Peng","doi":"10.1016/j.jnoncrysol.2025.123890","DOIUrl":"10.1016/j.jnoncrysol.2025.123890","url":null,"abstract":"<div><div>In this study, a series of novel lead-free Bi<sub>2</sub>O<sub>3</sub>–B<sub>2</sub>O<sub>3</sub>–ZnO–BaO–CuO low-melting glasses with varying content of CuO were prepared, and these matrix glass powder were then used to form composite glass with varying additions of β-eucryptite. The effects of the content of CuO and β-eucryptite on the structure, thermal properties, sealing performance and microstructure of the low-melting glasses were investigated. Structural analysis indicates that the glasses were composed of [BiO<sub>3</sub>], [BiO<sub>6</sub>], [BO<sub>3</sub>] and [BO<sub>4</sub>] basic units, and the amounts of [BiO<sub>3</sub>] and [BiO<sub>6</sub>] units decreased with increasing content of CuO, while the transformation of [BO<sub>4</sub>] to [BO<sub>3</sub>] led to a gradual increase in the amount of [BO<sub>3</sub>], which loosened the glass structure. The coefficient of thermal expansion (CTE) of the glasses gradually increased, while the characteristic temperature (T<sub>g</sub> and T<sub>d</sub>) and sealing temperature showed the opposite trend. The results also indicated that the CTE of the composite glasses decreased significantly with an increase in the external addition of β-eucryptite, and the sealing temperature did not increase substantially. Optimal comprehensive performance was observed at a β-eucryptite content of 6 %, resulting in a lower CTE of 87 × 10<sup>–7</sup> / °C and sealing temperature of 415 °C. Following sealing, the factors affecting the sealing strength and fracture mechanism of the sealing glasses were examined. The composite glasses are well-suitable as sealing materials for vacuum glazing, meeting the requirements for low-melting sealing glass and exhibiting a favorable market prospect.</div></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"674 ","pages":"Article 123890"},"PeriodicalIF":3.5,"publicationDate":"2025-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145651844","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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