Pub Date : 2024-09-11DOI: 10.1016/j.mtcomm.2024.110407
Jingde Liu, Zhen Li, Guirong Yang, Xiaoxiong Liu, Xugong Du, Wei Shi, Shixia Yang
Cu-12.5Ni-5Sn-xMo (x=0, 0.5, 1.0, 1.5 wt%) alloys were prepared using Spark Plasma Sintering (SPS) technology. The effect of Mo addition on the microstructure and mechanical properties of Cu-12.5Ni-5Sn alloy was investigated. The results indicate that adding trace amounts of Mo significantly refines the grain structure of Cu-12.5Ni-5Sn alloy, attributed to the formation of Mo-rich phases. Mo addition also inhibited the growth of discontinuous precipitation (DP) after aging treatment, reducing the DP volume fraction from approximately 25 % to 6 %. This effect is attributed to the precipitation of micron-sized Mo-rich phases at grain boundaries, which inhibit DP nucleation and growth by occupying γ-phase nucleation sites and pinning grain boundaries, thus impeding grain boundary diffusion. In addition, the interlamellar spacing of the discontinuous precipitation increases and the growth rate of lamellae decreases with increasing Mo content. Furthermore, an optimized combination of hardness (310 HB) and yield strength (586 MPa) was achieved in the Cu-12.5Ni-5Sn-1.0Mo alloy after aging treatment.
{"title":"Effect of Mo addition on microstructure and mechanical properties of Cu-12.5Ni-5Sn alloy","authors":"Jingde Liu, Zhen Li, Guirong Yang, Xiaoxiong Liu, Xugong Du, Wei Shi, Shixia Yang","doi":"10.1016/j.mtcomm.2024.110407","DOIUrl":"https://doi.org/10.1016/j.mtcomm.2024.110407","url":null,"abstract":"Cu-12.5Ni-5Sn-xMo (x=0, 0.5, 1.0, 1.5 wt%) alloys were prepared using Spark Plasma Sintering (SPS) technology. The effect of Mo addition on the microstructure and mechanical properties of Cu-12.5Ni-5Sn alloy was investigated. The results indicate that adding trace amounts of Mo significantly refines the grain structure of Cu-12.5Ni-5Sn alloy, attributed to the formation of Mo-rich phases. Mo addition also inhibited the growth of discontinuous precipitation (DP) after aging treatment, reducing the DP volume fraction from approximately 25 % to 6 %. This effect is attributed to the precipitation of micron-sized Mo-rich phases at grain boundaries, which inhibit DP nucleation and growth by occupying γ-phase nucleation sites and pinning grain boundaries, thus impeding grain boundary diffusion. In addition, the interlamellar spacing of the discontinuous precipitation increases and the growth rate of lamellae decreases with increasing Mo content. Furthermore, an optimized combination of hardness (310 HB) and yield strength (586 MPa) was achieved in the Cu-12.5Ni-5Sn-1.0Mo alloy after aging treatment.","PeriodicalId":18477,"journal":{"name":"Materials Today Communications","volume":"4 1","pages":""},"PeriodicalIF":3.8,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142269732","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 : 2024-09-11DOI: 10.1016/j.mtcomm.2024.110408
G.R. Ravanneswarran, Poovazhagan Lakshmanan, S. Santosh, M. Prem Ananth
Drug eluting stents (DES) have become essential to alleviate stenosis with minimally invasive procedures. Nickel-titanium (NiTi) based shape memory alloys (SMAs) are the most suitable materials for self-expanding stents due to their good stability and superior thermo-mechanical properties. This work explains the inscription of complex DES profiles by fiber laser micro-cutting (FLMC) on Nickel-Titanium-Cobalt (NiTiCo) SMA surfaces polished with various grits (1000 P, 1500 P, 2000 P, 2500 P, 3000 P, and cloth polished) of abrasive sheets. The impact of the SMA surface diffuse reflectance on laser micromachining characteristics was investigated. The Fuzzy PROMETHEE II multi-criteria decision-making (FP II-MCDM) technique was employed to find the best-polished surface that provides the most desired responses (kerf quality, surface roughness, and depth of penetration) for clinical applications. The cloth-polished surface responds better in laser machining without compromising the kerf quality and surface roughness. A significant variation of 18 % in kerf quality was found between the 3000 P and the cloth-polished surfaces. This indicates that the surface diffuse reflectance has maximum impact when the surfaces are highly polished. For applications where surface roughness and kerf width are not a criterion, then polished surfaces between 1500 P and 2000 P give the maximum machining rate.
药物洗脱支架（DES）已成为通过微创手术缓解血管狭窄的重要手段。镍钛（NiTi）形状记忆合金（SMA）具有良好的稳定性和优异的热机械性能，是最适合用于自扩张支架的材料。这项研究阐述了如何通过光纤激光微切割技术（FLMC）在镍钛钴（NiTiCo）SMA 表面刻画复杂的 DES 轮廓，这些表面是用不同磨粒（1000 P、1500 P、2000 P、2500 P、3000 P 和抛光布）的磨片抛光而成的。研究了 SMA 表面漫反射对激光微加工特性的影响。采用模糊 PROMETHEE II 多标准决策（FP II-MCDM）技术找到了最佳抛光表面，为临床应用提供了最理想的响应（切口质量、表面粗糙度和穿透深度）。在不影响切口质量和表面粗糙度的情况下，布抛光表面在激光加工中反应更好。3000 P 和抛光布表面的切口质量有 18% 的明显差异。这表明，当表面高度抛光时，表面漫反射影响最大。在不以表面粗糙度和切口宽度为标准的应用中，1500 P 和 2000 P 之间的抛光表面可获得最高的加工率。
{"title":"Inscription of complex stent profiles on the polished surfaces of NiTiCo shape memory alloys by fiber lasers: Examining the impact of diffuse reflectance","authors":"G.R. Ravanneswarran, Poovazhagan Lakshmanan, S. Santosh, M. Prem Ananth","doi":"10.1016/j.mtcomm.2024.110408","DOIUrl":"https://doi.org/10.1016/j.mtcomm.2024.110408","url":null,"abstract":"Drug eluting stents (DES) have become essential to alleviate stenosis with minimally invasive procedures. Nickel-titanium (NiTi) based shape memory alloys (SMAs) are the most suitable materials for self-expanding stents due to their good stability and superior thermo-mechanical properties. This work explains the inscription of complex DES profiles by fiber laser micro-cutting (FLMC) on Nickel-Titanium-Cobalt (NiTiCo) SMA surfaces polished with various grits (1000 P, 1500 P, 2000 P, 2500 P, 3000 P, and cloth polished) of abrasive sheets. The impact of the SMA surface diffuse reflectance on laser micromachining characteristics was investigated. The Fuzzy PROMETHEE II multi-criteria decision-making (FP II-MCDM) technique was employed to find the best-polished surface that provides the most desired responses (kerf quality, surface roughness, and depth of penetration) for clinical applications. The cloth-polished surface responds better in laser machining without compromising the kerf quality and surface roughness. A significant variation of 18 % in kerf quality was found between the 3000 P and the cloth-polished surfaces. This indicates that the surface diffuse reflectance has maximum impact when the surfaces are highly polished. For applications where surface roughness and kerf width are not a criterion, then polished surfaces between 1500 P and 2000 P give the maximum machining rate.","PeriodicalId":18477,"journal":{"name":"Materials Today Communications","volume":"209 1","pages":""},"PeriodicalIF":3.8,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142268267","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 : 2024-09-11DOI: 10.1016/j.mtcomm.2024.110350
Bo Xing, Xiaochong Liu, Yi Wang, Chaoting Fu, Xingyong Liu, Liang Jiang, Siyang Zhang, Quan Li, Guo Yang, Qilong Zhao, Mingliang Wu
N-methyloxymoroline-N-oxide (NMMO) has been used in large quantities for the production of new solvent-treated cellulose. But, excess HO used in the synthesis of NMMO from N-methylmorpholine (NMM) can adversely affect the quality of the product. This study introduces a novel approach using nitrogen and sulfur co-doped activated carbon (N,S co-doped AC) to catalyze the decomposition of residual HO in NMMO products. Characterization techniques including N adsorption/desorption, Raman, TEM, FT-IR, and XPS were used to study the surface properties and chemistry of activated carbon doped with heteroatoms. The results revealed that AC800NS800 (800 is the calcinate temperature, NS is denoted by the co-doped of N and S) exhibited superior catalytic performance for HO decomposition compared to singly doped activated carbons. Notably, over 95 % of HO in NMMO was decomposed, which the catalytic efficiency of AC800NS800 is no significant loss after ten times reuse. The exceptional catalytic activity of AC800NS800 is attributed to the presence of various functional groups on the surface (graphitic carbon, graphitic nitrogen, and pyrrole nitrogen). EPR tests identified HO• and O as the primary reactive species in the HO decomposition process. This study provides valuable insights into the catalytic decomposition of HO in NMMO solutions and offers a significant reference for the production of high-quality NMMO.
N-甲基羟吗啉-N-氧化物（NMMO）已被大量用于生产新型溶剂处理纤维素。但是，从 N-甲基吗啉（NMM）合成 NMMO 时使用过量的 HO 会对产品质量产生不利影响。本研究介绍了一种使用氮和硫共掺杂活性炭（N,S 共掺杂 AC）催化 NMMO 产品中残余 HO 分解的新方法。表征技术包括氮吸附/解吸、拉曼、TEM、傅立叶变换红外光谱和 XPS，用于研究掺杂杂原子的活性炭的表面性质和化学性质。结果表明，与单一掺杂的活性炭相比，AC800NS800（800 为煅烧温度，NS 表示 N 和 S 的共掺杂）在 HO 分解方面表现出更优越的催化性能。值得注意的是，NMMO 中超过 95% 的 HO 被分解，而 AC800NS800 的催化效率在重复使用十次后也没有明显下降。AC800NS800 特殊的催化活性归功于其表面存在的各种官能团（石墨碳、石墨氮和吡咯氮）。EPR 测试确定 HO- 和 O 是 HO 分解过程中的主要反应物。这项研究为了解 HO 在 NMMO 溶液中的催化分解提供了宝贵的见解，并为生产高质量的 NMMO 提供了重要参考。
{"title":"Catalytic decomposition of residual hydrogen peroxide in N-methylmorpholine-N-oxide by heteroatom doping modified activated carbon","authors":"Bo Xing, Xiaochong Liu, Yi Wang, Chaoting Fu, Xingyong Liu, Liang Jiang, Siyang Zhang, Quan Li, Guo Yang, Qilong Zhao, Mingliang Wu","doi":"10.1016/j.mtcomm.2024.110350","DOIUrl":"https://doi.org/10.1016/j.mtcomm.2024.110350","url":null,"abstract":"N-methyloxymoroline-N-oxide (NMMO) has been used in large quantities for the production of new solvent-treated cellulose. But, excess HO used in the synthesis of NMMO from N-methylmorpholine (NMM) can adversely affect the quality of the product. This study introduces a novel approach using nitrogen and sulfur co-doped activated carbon (N,S co-doped AC) to catalyze the decomposition of residual HO in NMMO products. Characterization techniques including N adsorption/desorption, Raman, TEM, FT-IR, and XPS were used to study the surface properties and chemistry of activated carbon doped with heteroatoms. The results revealed that AC800NS800 (800 is the calcinate temperature, NS is denoted by the co-doped of N and S) exhibited superior catalytic performance for HO decomposition compared to singly doped activated carbons. Notably, over 95 % of HO in NMMO was decomposed, which the catalytic efficiency of AC800NS800 is no significant loss after ten times reuse. The exceptional catalytic activity of AC800NS800 is attributed to the presence of various functional groups on the surface (graphitic carbon, graphitic nitrogen, and pyrrole nitrogen). EPR tests identified HO• and O as the primary reactive species in the HO decomposition process. This study provides valuable insights into the catalytic decomposition of HO in NMMO solutions and offers a significant reference for the production of high-quality NMMO.","PeriodicalId":18477,"journal":{"name":"Materials Today Communications","volume":"14 1","pages":""},"PeriodicalIF":3.8,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142268269","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 : 2024-09-11DOI: 10.1016/j.mtcomm.2024.110379
Chenlu Fan, Li Zhang, Shushuai Liu, Guan Wang, Liang Zou
During the electromagnetic rail launching process, the severe ablation of the armature caused by the arc can easily lead to launch failure. Therefore, it is necessary to study methods of enhancing the anti-ablation property of the armature. One effective method is to prepare metal-ceramic composite coating on the surface of aluminium alloy armature. This paper conducts molecular dynamics simulation on the ablation protection effect of TiC particle reinforced aluminum matrix composite coatings on the aluminum armature substrate. By applying a surface Gaussian heat source to simulate the arc ablation effect, the micro-enhancement mechanism of TiC particles is analyzed through the depth of ablation craters, material mass loss, and the evolution of TiC particle morphology. The results show that the degree of material ablation intensifies with the increase of arc discharge power. The composite coating helps to improve the anti-ablation performance of the armature, and the anti-ablation performance first increases and then decreases with the increase of TiC mass fraction. The results can provide a theoretical foundation and technical support for optimizing design of anti-ablation performance of armature materials.
{"title":"Research on the anti-ablation performance of TiC particle reinforced aluminum matrix composite coating","authors":"Chenlu Fan, Li Zhang, Shushuai Liu, Guan Wang, Liang Zou","doi":"10.1016/j.mtcomm.2024.110379","DOIUrl":"https://doi.org/10.1016/j.mtcomm.2024.110379","url":null,"abstract":"During the electromagnetic rail launching process, the severe ablation of the armature caused by the arc can easily lead to launch failure. Therefore, it is necessary to study methods of enhancing the anti-ablation property of the armature. One effective method is to prepare metal-ceramic composite coating on the surface of aluminium alloy armature. This paper conducts molecular dynamics simulation on the ablation protection effect of TiC particle reinforced aluminum matrix composite coatings on the aluminum armature substrate. By applying a surface Gaussian heat source to simulate the arc ablation effect, the micro-enhancement mechanism of TiC particles is analyzed through the depth of ablation craters, material mass loss, and the evolution of TiC particle morphology. The results show that the degree of material ablation intensifies with the increase of arc discharge power. The composite coating helps to improve the anti-ablation performance of the armature, and the anti-ablation performance first increases and then decreases with the increase of TiC mass fraction. The results can provide a theoretical foundation and technical support for optimizing design of anti-ablation performance of armature materials.","PeriodicalId":18477,"journal":{"name":"Materials Today Communications","volume":"44 1","pages":""},"PeriodicalIF":3.8,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142268268","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}
This study compares the effects of varying concentrations of nano-kaolin and titanium dioxide on the mechanical and corrosion resistance of epoxy coatings. Characterization techniques such as TEM, XRD, Raman, FTIR, XPS, and AFM revealed surface features of nano-kaolin: the particle size reached the nanoscale, the XRD diffraction peak at 2θ = 25.3° disappeared, Raman peaks broadened with decreased intensity, and a blue shift occurred in the FTIR spectra for various functional groups. Compared to pure epoxy coatings, the composite epoxy coating with 10 wt% nano-kaolin showed an 83.87 % increase in adhesion, an 81.82 % improvement in impact resistance, and a 61.42 % reduction in friction coefficient; while a 20 wt% titanium dioxide composite coating showed a 74.19 % increase in adhesion, a 75.76 % improvement in impact resistance, and a 46.9 % reduction in friction coefficient. Electrochemical tests indicated that a composite coating with 10 wt% nano-kaolin, after soaking in 3.5 wt% NaCl solution for 960 hours, achieved a corrosion efficiency of 98.87 % and an impedance modulus of 10Ω.cm which was three orders of magnitude higher than that of pure epoxy resin, increasing corrosion resistance by 57.14 %; whereas a 20 wt% titanium dioxide composite coating reached a corrosion efficiency of 89.29 % and an impedance modulus of 10Ω.cm after the same conditions, increasing corrosion resistance by 17.86 % compared to the pure epoxy resin. The composite coating with 10 wt% nano-kaolin exhibited superior mechanical and corrosion resistance, outperforming the 20 wt% titanium dioxide coating. Mechanical and corrosion mechanisms suggest that the uniformly dispersed nano-kaolin inhibits interactions between epoxy resin molecules and carries the external load, thereby enhancing intermolecular cohesion. Improved adhesion and impact resistance indirectly extend the coating's lifespan by prolonging the path of corrosion media through the coating to the substrate. The novel coating modification method proposed in this study effectively replaces titanium dioxide and enhances the coating's mechanical and corrosion resistance, offering a new solution for corrosion prevention in metal materials.
{"title":"Characterization of Nano-kaolin and its enhancement of the mechanical and corrosion resistance of epoxy coatings","authors":"Yuhan Zhang, Xuesong Zhao, Baoyue Shang, Xuesong Wang, Xiulin Wu, Tingting Li","doi":"10.1016/j.mtcomm.2024.110371","DOIUrl":"https://doi.org/10.1016/j.mtcomm.2024.110371","url":null,"abstract":"This study compares the effects of varying concentrations of nano-kaolin and titanium dioxide on the mechanical and corrosion resistance of epoxy coatings. Characterization techniques such as TEM, XRD, Raman, FTIR, XPS, and AFM revealed surface features of nano-kaolin: the particle size reached the nanoscale, the XRD diffraction peak at 2θ = 25.3° disappeared, Raman peaks broadened with decreased intensity, and a blue shift occurred in the FTIR spectra for various functional groups. Compared to pure epoxy coatings, the composite epoxy coating with 10 wt% nano-kaolin showed an 83.87 % increase in adhesion, an 81.82 % improvement in impact resistance, and a 61.42 % reduction in friction coefficient; while a 20 wt% titanium dioxide composite coating showed a 74.19 % increase in adhesion, a 75.76 % improvement in impact resistance, and a 46.9 % reduction in friction coefficient. Electrochemical tests indicated that a composite coating with 10 wt% nano-kaolin, after soaking in 3.5 wt% NaCl solution for 960 hours, achieved a corrosion efficiency of 98.87 % and an impedance modulus of 10Ω.cm which was three orders of magnitude higher than that of pure epoxy resin, increasing corrosion resistance by 57.14 %; whereas a 20 wt% titanium dioxide composite coating reached a corrosion efficiency of 89.29 % and an impedance modulus of 10Ω.cm after the same conditions, increasing corrosion resistance by 17.86 % compared to the pure epoxy resin. The composite coating with 10 wt% nano-kaolin exhibited superior mechanical and corrosion resistance, outperforming the 20 wt% titanium dioxide coating. Mechanical and corrosion mechanisms suggest that the uniformly dispersed nano-kaolin inhibits interactions between epoxy resin molecules and carries the external load, thereby enhancing intermolecular cohesion. Improved adhesion and impact resistance indirectly extend the coating's lifespan by prolonging the path of corrosion media through the coating to the substrate. The novel coating modification method proposed in this study effectively replaces titanium dioxide and enhances the coating's mechanical and corrosion resistance, offering a new solution for corrosion prevention in metal materials.","PeriodicalId":18477,"journal":{"name":"Materials Today Communications","volume":"11 1","pages":""},"PeriodicalIF":3.8,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142268275","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}
This study investigates the impacts of strain ratio and pre-strain on the low-cycle fatigue properties and microscopic damage mechanisms of 4130X steel across varying strain amplitudes. Under symmetric loading, initial cycles at low strain amplitudes demonstrate clear peak/valley stress hardening followed by cyclic softening in later stages of fatigue. In contrast, the hardening behavior vanishes at higher strain amplitudes. Increasing strain ratio and pre-strain cause the initial hardening behavior at low strain amplitudes to gradually disappear. Additionally, at lower strain amplitudes, fatigue life decreases as strain ratio and pre-strain rise, attributed to substantial tensile mean stress. Microscopic examination reveals that symmetric cyclic loading at low strain amplitudes releases stress concentrations caused by quenched and tempered processing and reduces both dislocation density and localized plastic strain. Conversely, at higher strain ratios and pre-strains, increased tensile mean stresses not only intensify dislocation multiplication, resulting in high dislocation density, but also activate multi-slip system, leading to dislocation cross-slip. Moreover, at a high strain amplitude of 0.45 %, pre-strain aids in martensite recovery and promotes dislocation annihilation during recovery, thus inducing cyclic softening. Finally, the fatigue lives under varied loading conditions are compared with the fatigue design curve prescribed by ASME VIII-II code.
{"title":"Effect of strain ratio and pre-strain on the low-cycle fatigue behavior of 4130X steel at different strain amplitudes","authors":"Dengdeng Rong, Wei Zhang, Weijie Chen, Xiang Li, Guangzhou Zhao, Xiaohua He, Changyu Zhou","doi":"10.1016/j.mtcomm.2024.110340","DOIUrl":"https://doi.org/10.1016/j.mtcomm.2024.110340","url":null,"abstract":"This study investigates the impacts of strain ratio and pre-strain on the low-cycle fatigue properties and microscopic damage mechanisms of 4130X steel across varying strain amplitudes. Under symmetric loading, initial cycles at low strain amplitudes demonstrate clear peak/valley stress hardening followed by cyclic softening in later stages of fatigue. In contrast, the hardening behavior vanishes at higher strain amplitudes. Increasing strain ratio and pre-strain cause the initial hardening behavior at low strain amplitudes to gradually disappear. Additionally, at lower strain amplitudes, fatigue life decreases as strain ratio and pre-strain rise, attributed to substantial tensile mean stress. Microscopic examination reveals that symmetric cyclic loading at low strain amplitudes releases stress concentrations caused by quenched and tempered processing and reduces both dislocation density and localized plastic strain. Conversely, at higher strain ratios and pre-strains, increased tensile mean stresses not only intensify dislocation multiplication, resulting in high dislocation density, but also activate multi-slip system, leading to dislocation cross-slip. Moreover, at a high strain amplitude of 0.45 %, pre-strain aids in martensite recovery and promotes dislocation annihilation during recovery, thus inducing cyclic softening. Finally, the fatigue lives under varied loading conditions are compared with the fatigue design curve prescribed by ASME VIII-II code.","PeriodicalId":18477,"journal":{"name":"Materials Today Communications","volume":"382 1","pages":""},"PeriodicalIF":3.8,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142268277","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 : 2024-09-10DOI: 10.1016/j.mtcomm.2024.110362
Yulu Zhang, Ying Qin, Yue Sun, Xia Liu, Zhengbin Wang
In this paper, a new corrosion inhibitor based on cobalt- phenanthroline- p-hydroxybenzoic acid ternary complex was synthesized. Its anti-corrosion effects on carbon steel in 0.5 M HCl were investigated by weight-loss measurements, electrochemical tests, surface analyses, and quantum chemical calculations. The results indicated that the Co-phen-phba ternary complex exhibits excellent anti-corrosion efficiencies of ∼97 % at 298 K and ∼86 % at 328 K. The excellent anti-corrosion performance of Co-phen-phba ternary complex could be attributed to the combination of inorganic and organic corrosion inhibitors. Theoretical calculations established the correlation between the structure and the anti-corrosion effect of corrosion inhibitor.
本文合成了一种基于钴-菲罗啉-对羟基苯甲酸三元复合物的新型缓蚀剂。通过失重测量、电化学测试、表面分析和量子化学计算，研究了其在 0.5 M HCl 溶液中对碳钢的防腐效果。结果表明，Co-phen-phba 三元复合物在 298 K 和 328 K 条件下的抗腐蚀效率分别为 97% 和 86%。Co-phen-phba 三元复合物的优异防腐性能可能归功于无机和有机缓蚀剂的结合。理论计算确定了结构与缓蚀剂防腐效果之间的相关性。
{"title":"Synthesis, characterization and anticorrosion performance of a new corrosion inhibitor based on cobalt- phenanthroline- p-hydroxybenzoic acid ternary complex","authors":"Yulu Zhang, Ying Qin, Yue Sun, Xia Liu, Zhengbin Wang","doi":"10.1016/j.mtcomm.2024.110362","DOIUrl":"https://doi.org/10.1016/j.mtcomm.2024.110362","url":null,"abstract":"In this paper, a new corrosion inhibitor based on cobalt- phenanthroline- p-hydroxybenzoic acid ternary complex was synthesized. Its anti-corrosion effects on carbon steel in 0.5 M HCl were investigated by weight-loss measurements, electrochemical tests, surface analyses, and quantum chemical calculations. The results indicated that the Co-phen-phba ternary complex exhibits excellent anti-corrosion efficiencies of ∼97 % at 298 K and ∼86 % at 328 K. The excellent anti-corrosion performance of Co-phen-phba ternary complex could be attributed to the combination of inorganic and organic corrosion inhibitors. Theoretical calculations established the correlation between the structure and the anti-corrosion effect of corrosion inhibitor.","PeriodicalId":18477,"journal":{"name":"Materials Today Communications","volume":"64 1","pages":""},"PeriodicalIF":3.8,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142269734","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 : 2024-09-10DOI: 10.1016/j.mtcomm.2024.110343
Ezgi Ogur, Alexandra C. Alves, Fatih Toptan
Despite possessing numerous superior properties, titanium, and its alloys exhibit inadequacies in terms of tribocorrosion, bioactivity, and antimicrobial characteristics. In recent years, there has been a rapid increase in research focusing on micro-arc oxidation (MAO) surface treatments to enhance these properties. In the traditional MAO approach, researchers commonly investigate the introduction of additional functionalities to the surface through ion doping. However, over the past decade, studies have indicated that the inclusion of solid substances, either as substitutes for or in conjunction with ion doping, can provide further advantages in terms of multifunctionality. Therefore, this review comprehensively and systematically examines the characteristics of solid substances used during MAO, their incorporation mechanisms, and their influence on resulting biological and degradation behaviors, as well as properties such as photocatalytic activity, magnetic features, high-temperature oxidation resistance, electrical insulation, and thermal shock resistance. This review showed that the integration of solid substances during MAO represents a promising avenue for achieving multifunctional surface enhancements in titanium and its alloys. This review highlights the diverse range of properties and behaviors influenced by these solid substances, offering insights for future research and applications in the field of surface engineering and biomaterials science.
尽管钛及其合金具有许多优越性能，但在摩擦腐蚀、生物活性和抗菌特性方面仍有不足之处。近年来，有关微弧氧化（MAO）表面处理以增强这些特性的研究迅速增加。在传统的 MAO 方法中，研究人员通常研究通过离子掺杂在表面引入额外的功能性。然而，过去十年的研究表明，加入固体物质作为离子掺杂的替代品或与离子掺杂结合使用，可在多功能性方面提供更多优势。因此，本综述全面系统地研究了 MAO 过程中使用的固体物质的特性、掺入机制、对生物和降解行为的影响，以及光催化活性、磁性特征、高温抗氧化性、电绝缘性和抗热震性等性能。综述表明，在 MAO 过程中整合固体物质是实现钛及其合金多功能表面增强的一条大有可为的途径。本综述强调了受这些固体物质影响的各种性能和行为，为表面工程和生物材料科学领域的未来研究和应用提供了启示。
{"title":"Advancing titanium-based surfaces via micro-arc oxidation with solid substance incorporation: A systematic review","authors":"Ezgi Ogur, Alexandra C. Alves, Fatih Toptan","doi":"10.1016/j.mtcomm.2024.110343","DOIUrl":"https://doi.org/10.1016/j.mtcomm.2024.110343","url":null,"abstract":"Despite possessing numerous superior properties, titanium, and its alloys exhibit inadequacies in terms of tribocorrosion, bioactivity, and antimicrobial characteristics. In recent years, there has been a rapid increase in research focusing on micro-arc oxidation (MAO) surface treatments to enhance these properties. In the traditional MAO approach, researchers commonly investigate the introduction of additional functionalities to the surface through ion doping. However, over the past decade, studies have indicated that the inclusion of solid substances, either as substitutes for or in conjunction with ion doping, can provide further advantages in terms of multifunctionality. Therefore, this review comprehensively and systematically examines the characteristics of solid substances used during MAO, their incorporation mechanisms, and their influence on resulting biological and degradation behaviors, as well as properties such as photocatalytic activity, magnetic features, high-temperature oxidation resistance, electrical insulation, and thermal shock resistance. This review showed that the integration of solid substances during MAO represents a promising avenue for achieving multifunctional surface enhancements in titanium and its alloys. This review highlights the diverse range of properties and behaviors influenced by these solid substances, offering insights for future research and applications in the field of surface engineering and biomaterials science.","PeriodicalId":18477,"journal":{"name":"Materials Today Communications","volume":"22 1","pages":""},"PeriodicalIF":3.8,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142269735","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 : 2024-09-10DOI: 10.1016/j.mtcomm.2024.110369
Yunfeng Li, Yajie Qiu, Yan Shi, Guangjun Jiang, Pucun Bai
Using laser cladding technology to prepare coatings on the gear ring of the main wheel made of ZG42CrMoA, the composite coatings consisting of γ-Ni, MC, NiB, WC, and WC. As the amount of WC nanoparticles increased, a "pinning" effect on dislocations hindered dislocation movement during wear, Comparative analysis showed a reduction in wear rate by 76.94 % and 72.80 % compared to the untreated substrate and high-frequency quenched substrate, respectively. Further, finite-element analysis indicated maximum compressive stress values of 274.37 MPa and 262.20 MPa during the impact and friction phases, respectively. This was lower than the corresponding values of the high-frequency quenched layer, which were 288.63 MPa and 283.16 MPa. The corrosion current density of the composite coating reduced by 87.98 % and 92.71 % compared to the untreated substrate and the high-frequency quenched substrate, respectively. Additionally, the electrochemical impedance amplitude of the composite coating was 72,456 Ω, which was substantially higher than that of the high-frequency quenched substrate (1270 Ω) and the untreated substrate (1717 Ω) by 570.5 % and 422.0 %.
{"title":"Microstructure, wear and corrosion resistance of Ni-based composite coating by multi-layer laser cladding","authors":"Yunfeng Li, Yajie Qiu, Yan Shi, Guangjun Jiang, Pucun Bai","doi":"10.1016/j.mtcomm.2024.110369","DOIUrl":"https://doi.org/10.1016/j.mtcomm.2024.110369","url":null,"abstract":"Using laser cladding technology to prepare coatings on the gear ring of the main wheel made of ZG42CrMoA, the composite coatings consisting of γ-Ni, MC, NiB, WC, and WC. As the amount of WC nanoparticles increased, a \"pinning\" effect on dislocations hindered dislocation movement during wear, Comparative analysis showed a reduction in wear rate by 76.94 % and 72.80 % compared to the untreated substrate and high-frequency quenched substrate, respectively. Further, finite-element analysis indicated maximum compressive stress values of 274.37 MPa and 262.20 MPa during the impact and friction phases, respectively. This was lower than the corresponding values of the high-frequency quenched layer, which were 288.63 MPa and 283.16 MPa. The corrosion current density of the composite coating reduced by 87.98 % and 92.71 % compared to the untreated substrate and the high-frequency quenched substrate, respectively. Additionally, the electrochemical impedance amplitude of the composite coating was 72,456 Ω, which was substantially higher than that of the high-frequency quenched substrate (1270 Ω) and the untreated substrate (1717 Ω) by 570.5 % and 422.0 %.","PeriodicalId":18477,"journal":{"name":"Materials Today Communications","volume":"2 1","pages":""},"PeriodicalIF":3.8,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142268276","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 : 2024-09-10DOI: 10.1016/j.mtcomm.2024.110399
Qifeng Wang, Baosen Fu, Wanqiu Wang, Ling Cao, He Tang, Xiuling Liu, Boyu Jiang, Xiaoyun Mi
Optical thermometer has got lots of attention by virtue of non-contact, fast response speed, high sensitivity, anti-interference ability, which is less affected by the environment. However, most fluorescent thermometers still suffer from low sensitivity. Here, an optical thermometer based on NaBiF: Er/Yb/Lu with enhanced upconversion luminescence is reported. The sample emits strong green light of Er under 980 nm laser excitation and with the increase of Lu, the whole luminescence intensity of NaBiF: 2 % Er/20 % Yb/ 2.5 % Lu is enhanced by about 3 times, which due to local crystal field distortion. Meanwhile, the lifetime of Er is prolonged and the temperature detection performance is also improved with the substitution of Lu. The relative sensitivity reaches a maximum of 0.841 % K at 301 K. The results suggest that it is an optical nanothermometer with great potential.
光学温度计以其非接触、反应速度快、灵敏度高、抗干扰能力强、受环境影响小等优点而备受关注。然而，大多数荧光温度计仍然存在灵敏度低的问题。本文报告了一种基于 NaBiF：Er/Yb/Lu 的增强上转换发光光学温度计。该样品在 980 nm 激光激发下发出强烈的 Er 绿光，随着 Lu 的增加，NaBiF：2 % Er/20 % Yb/ 2.5 % Lu 的整体发光强度增强了约 3 倍，这是由于局部晶场畸变所致。同时，由于取代了 Lu，Er 的寿命延长了，温度检测性能也得到了改善。相对灵敏度在 301 K 时达到最大值 0.841 % K。结果表明，这是一种具有巨大潜力的光学纳米温度计。
{"title":"Enhancement of upconversion luminescence in NaBiF4: Er3+/Yb3+/Lu3+ for temperature detection","authors":"Qifeng Wang, Baosen Fu, Wanqiu Wang, Ling Cao, He Tang, Xiuling Liu, Boyu Jiang, Xiaoyun Mi","doi":"10.1016/j.mtcomm.2024.110399","DOIUrl":"https://doi.org/10.1016/j.mtcomm.2024.110399","url":null,"abstract":"Optical thermometer has got lots of attention by virtue of non-contact, fast response speed, high sensitivity, anti-interference ability, which is less affected by the environment. However, most fluorescent thermometers still suffer from low sensitivity. Here, an optical thermometer based on NaBiF: Er/Yb/Lu with enhanced upconversion luminescence is reported. The sample emits strong green light of Er under 980 nm laser excitation and with the increase of Lu, the whole luminescence intensity of NaBiF: 2 % Er/20 % Yb/ 2.5 % Lu is enhanced by about 3 times, which due to local crystal field distortion. Meanwhile, the lifetime of Er is prolonged and the temperature detection performance is also improved with the substitution of Lu. The relative sensitivity reaches a maximum of 0.841 % K at 301 K. The results suggest that it is an optical nanothermometer with great potential.","PeriodicalId":18477,"journal":{"name":"Materials Today Communications","volume":"46 1","pages":""},"PeriodicalIF":3.8,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142268270","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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