Pub Date : 2024-09-01DOI: 10.1016/S1003-6326(24)66587-8
Liu-bin SONG , Tian-yuan LONG , Min-zhi XIAO , Min LIU , Ting-ting ZHAO , Yin-jie KUANG , Lin JIANG , Zhong-liang XIAO
A composite solid electrolyte comprising a Cu−Al bimetallic metal-organic framework (CAB), lithium salt (LiTFSI) and polyethylene oxide (PEO) was fabricated through molecular grafting to enhance the ionic conductivity of the PEO-based electrolytes. Experimental and molecular dynamics simulation results indicated that the electrolyte with 10 wt.% CAB (PL-CAB-10%) exhibits high ionic conductivity (8.42×10−4 S/cm at 60 °C), high Li+ transference number (0.46), wide electrochemical window (4.91 V), good thermal stability, and outstanding mechanical properties. Furthermore, PL-CAB-10% exhibits excellent cycle stability in both Li−Li symmetric battery and Li/PL-CAB- 10%/LiFePO4 asymmetric battery setups. These enhanced performances are primarily attributable to the introduction of the versatile CAB. The abundant metal sites in CAB can react with TFSI− and PEO through Lewis acid–base interactions, promoting LiTFSI dissociation and improving ionic conductivity. Additionally, regular pores in CAB provide uniformly distributed sites for cation plating during cycling.
{"title":"Improvement of ionic conductivity of solid polymer electrolyte based on Cu−Al bimetallic metal-organic framework fabricated through molecular grafting","authors":"Liu-bin SONG , Tian-yuan LONG , Min-zhi XIAO , Min LIU , Ting-ting ZHAO , Yin-jie KUANG , Lin JIANG , Zhong-liang XIAO","doi":"10.1016/S1003-6326(24)66587-8","DOIUrl":"10.1016/S1003-6326(24)66587-8","url":null,"abstract":"<div><div>A composite solid electrolyte comprising a Cu−Al bimetallic metal-organic framework (CAB), lithium salt (LiTFSI) and polyethylene oxide (PEO) was fabricated through molecular grafting to enhance the ionic conductivity of the PEO-based electrolytes. Experimental and molecular dynamics simulation results indicated that the electrolyte with 10 wt.% CAB (PL-CAB-10%) exhibits high ionic conductivity (8.42×10<sup>−4</sup> S/cm at 60 °C), high Li<sup>+</sup> transference number (0.46), wide electrochemical window (4.91 V), good thermal stability, and outstanding mechanical properties. Furthermore, PL-CAB-10% exhibits excellent cycle stability in both Li−Li symmetric battery and Li/PL-CAB- 10%/LiFePO<sub>4</sub> asymmetric battery setups. These enhanced performances are primarily attributable to the introduction of the versatile CAB. The abundant metal sites in CAB can react with TFSI<sup>−</sup> and PEO through Lewis acid–base interactions, promoting LiTFSI dissociation and improving ionic conductivity. Additionally, regular pores in CAB provide uniformly distributed sites for cation plating during cycling.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"34 9","pages":"Pages 2943-2958"},"PeriodicalIF":4.7,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142531404","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-01DOI: 10.1016/S1003-6326(24)66590-8
Jia-qiao YUAN , Zhan DING , Yun-xiao BI , Jie LI , Shu-ming WEN , Shao-jun BAI
The lime-depressed pyrite from Cu differential flotation tailings with acid mine drainage (AMD) as a natural activator was recovered. The effect of AMD on lime-depressed pyrite flotation was investigated by a series of laboratory flotation tests and surface analytical techniques. Flotation test results indicated that AMD could effectively activate the pyrite flotation with a sodium butyl xanthate (SBX) collector, and a high-quality sulfur concentrate was obtained. Pulp ion concentration analysis results indicated that AMD facilitated desorption of Ca2+ and adsorption of Cu2+ on the depressed-pyrite surface. Adsorption measurements and contact angle analysis results confirmed that adding AMD improved the adsorption amount of SBX collector on the pyrite surface and increased the contact angle by 31°. Results of Raman spectroscopy and X-ray photoelectron spectroscopy analysis indicated that AMD treatment promoted the formation of hydrophobic species (S0 hydrophobic entity and copper sulfides) and the removal of hydrophilic calcium and iron species on the pyrite surface, which reinforced the adsorption of collector. The findings of the present research provide important theoretical basis and technical support for a cleaner production of copper sulfide ores.
{"title":"Acid mine drainage activation mechanism on lime-depressed pyrite flotation from copper sulfide ore","authors":"Jia-qiao YUAN , Zhan DING , Yun-xiao BI , Jie LI , Shu-ming WEN , Shao-jun BAI","doi":"10.1016/S1003-6326(24)66590-8","DOIUrl":"10.1016/S1003-6326(24)66590-8","url":null,"abstract":"<div><div>The lime-depressed pyrite from Cu differential flotation tailings with acid mine drainage (AMD) as a natural activator was recovered. The effect of AMD on lime-depressed pyrite flotation was investigated by a series of laboratory flotation tests and surface analytical techniques. Flotation test results indicated that AMD could effectively activate the pyrite flotation with a sodium butyl xanthate (SBX) collector, and a high-quality sulfur concentrate was obtained. Pulp ion concentration analysis results indicated that AMD facilitated desorption of Ca<sup>2+</sup> and adsorption of Cu<sup>2+</sup> on the depressed-pyrite surface. Adsorption measurements and contact angle analysis results confirmed that adding AMD improved the adsorption amount of SBX collector on the pyrite surface and increased the contact angle by 31°. Results of Raman spectroscopy and X-ray photoelectron spectroscopy analysis indicated that AMD treatment promoted the formation of hydrophobic species (S<sup>0</sup> hydrophobic entity and copper sulfides) and the removal of hydrophilic calcium and iron species on the pyrite surface, which reinforced the adsorption of collector. The findings of the present research provide important theoretical basis and technical support for a cleaner production of copper sulfide ores.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"34 9","pages":"Pages 2987-3001"},"PeriodicalIF":4.7,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142531407","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-01DOI: 10.1016/S1003-6326(24)66595-7
Sheng-guo XUE , Jing-pei FENG , Wen-shun KE , Mu LI , Kun-yan QIU , Chu-xuan LI , Chuan WU , Lin GUO
A general prediction model for seven heavy metals was established using the heavy metal contents of 207 soil samples measured by a portable X-ray fluorescence spectrometer (XRF) and six environmental factors as model correction coefficients. The eXtreme Gradient Boosting (XGBoost) model was used to fit the relationship between the content of heavy metals and environment characteristics to evaluate the soil ecological risk of the smelting site. The results demonstrated that the generalized prediction model developed for Pb, Cd, and As was highly accurate with fitted coefficients (R2) values of 0.911, 0.950, and 0.835, respectively. Topsoil presented the highest ecological risk, and there existed high potential ecological risk at some positions with different depths due to high mobility of Cd. Generally, the application of machine learning significantly increased the accuracy of pXRF measurements, and identified key environmental factors. The adapted potential ecological risk assessment emphasized the need to focus on Pb, Cd, and As in future site remediation efforts.
利用便携式 X 射线荧光光谱仪（XRF）测量了 207 个土壤样本的重金属含量，并将六个环境因素作为模型修正系数，建立了七种重金属的一般预测模型。采用极端梯度提升（XGBoost）模型拟合重金属含量与环境特征之间的关系，以评估冶炼场地的土壤生态风险。结果表明，针对铅、镉和砷建立的广义预测模型准确度很高，拟合系数（R2）分别为 0.911、0.950 和 0.835。表层土的生态风险最高，由于镉的高流动性，在一些不同深度的位置存在较高的潜在生态风险。总体而言，机器学习的应用大大提高了 pXRF 测量的准确性，并确定了关键的环境因素。经过调整的潜在生态风险评估强调了在未来的场地修复工作中重点关注铅、镉和砷的必要性。
{"title":"Rapid detection and risk assessment of soil contamination at lead smelting site based on machine learning","authors":"Sheng-guo XUE , Jing-pei FENG , Wen-shun KE , Mu LI , Kun-yan QIU , Chu-xuan LI , Chuan WU , Lin GUO","doi":"10.1016/S1003-6326(24)66595-7","DOIUrl":"10.1016/S1003-6326(24)66595-7","url":null,"abstract":"<div><div>A general prediction model for seven heavy metals was established using the heavy metal contents of 207 soil samples measured by a portable X-ray fluorescence spectrometer (XRF) and six environmental factors as model correction coefficients. The eXtreme Gradient Boosting (XGBoost) model was used to fit the relationship between the content of heavy metals and environment characteristics to evaluate the soil ecological risk of the smelting site. The results demonstrated that the generalized prediction model developed for Pb, Cd, and As was highly accurate with fitted coefficients (<em>R</em><sup>2</sup>) values of 0.911, 0.950, and 0.835, respectively. Topsoil presented the highest ecological risk, and there existed high potential ecological risk at some positions with different depths due to high mobility of Cd. Generally, the application of machine learning significantly increased the accuracy of pXRF measurements, and identified key environmental factors. The adapted potential ecological risk assessment emphasized the need to focus on Pb, Cd, and As in future site remediation efforts.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"34 9","pages":"Pages 3054-3068"},"PeriodicalIF":4.7,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142531308","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-01DOI: 10.1016/S1003-6326(24)66575-1
You LÜ, Xiang-zhe MENG, Yan-yan LI, Ze-hua DONG, Xin-xin ZHANG
As a promising material in the aircraft industry, 2A97 Al−Cu−Li alloy exhibits high corrosion susceptibility that may limit its application. In the present work, to illustrate the influences of precipitate and grain-stored energy on localized corrosion evolution in 2A97 Al−Cu−Li alloy, cold working and artificial aging were carried out to produce 2A97 Al−Cu−Li alloys under different thermomechanical conditions. Quasi-in-situ analysis, traditional immersion test and electrochemical measurement were then conducted to examine the corrosion behavior of 2A97 alloys. It is revealed that precipitate significantly affects Cu enrichment at corrosion fronts, which determines corrosion susceptibility of alloys, whereas grain-stored energy distribution is closely associated with localized corrosion propagation. It is also indicated that quasi-in-situ analysis exhibits a consistent corrosion evolution with traditional immersion tests, which is regarded as a proper method to explore localized corrosion mechanisms by providing local microstructural information with enhanced time and spatial resolutions.
{"title":"Corrosion behavior of 2A97 Al−Cu−Li alloys in different thermomechanical conditions by quasi-in-situ analysis","authors":"You LÜ, Xiang-zhe MENG, Yan-yan LI, Ze-hua DONG, Xin-xin ZHANG","doi":"10.1016/S1003-6326(24)66575-1","DOIUrl":"10.1016/S1003-6326(24)66575-1","url":null,"abstract":"<div><div>As a promising material in the aircraft industry, 2A97 Al−Cu−Li alloy exhibits high corrosion susceptibility that may limit its application. In the present work, to illustrate the influences of precipitate and grain-stored energy on localized corrosion evolution in 2A97 Al−Cu−Li alloy, cold working and artificial aging were carried out to produce 2A97 Al−Cu−Li alloys under different thermomechanical conditions. Quasi-in-situ analysis, traditional immersion test and electrochemical measurement were then conducted to examine the corrosion behavior of 2A97 alloys. It is revealed that precipitate significantly affects Cu enrichment at corrosion fronts, which determines corrosion susceptibility of alloys, whereas grain-stored energy distribution is closely associated with localized corrosion propagation. It is also indicated that quasi-in-situ analysis exhibits a consistent corrosion evolution with traditional immersion tests, which is regarded as a proper method to explore localized corrosion mechanisms by providing local microstructural information with enhanced time and spatial resolutions.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"34 9","pages":"Pages 2772-2786"},"PeriodicalIF":4.7,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142531494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-01DOI: 10.1016/S1003-6326(24)66585-4
Peng-ze LI , Yu ZHANG , Jia-zheng ZHANG , Lin LIU , Shi-yi WANG , Rui LIU , Ye SONG , Xu-fei ZHU
Constant-current anodization of pure aluminum was carried out in non-corrosive capacitor working electrolytes to study the formation mechanism of nanopores in the anodic oxide films. Through comparative experiments, nanopores are found in the anodic films formed in the electrolytes after high-temperature storage (HTS) at 130 °C for 240 h. A comparison of the voltage−time curves suggests that the formation of nanopores results from the decrease in formation efficiency of anodic oxide films rather than the corrosion of the electrolytes. FT-IR and UV spectra analysis shows that carboxylate and ethylene glycol in electrolytes can easily react by esterification at high temperatures. Combining the electronic current theory and oxygen bubble mold effect, the change in electrolyte composition could increase the electronic current in the anodizing process. The electronic current decreases the formation efficiency of anodic oxide films, and oxygen bubbles accompanying electronic current lead to the formation of nanopores in the dense films. The continuous electronic current and oxygen bubbles are the prerequisites for the formation of porous anodic oxides rather than the traditional field-assisted dissolution model.
{"title":"Formation mechanism of nanopores in dense films of anodic alumina","authors":"Peng-ze LI , Yu ZHANG , Jia-zheng ZHANG , Lin LIU , Shi-yi WANG , Rui LIU , Ye SONG , Xu-fei ZHU","doi":"10.1016/S1003-6326(24)66585-4","DOIUrl":"10.1016/S1003-6326(24)66585-4","url":null,"abstract":"<div><div>Constant-current anodization of pure aluminum was carried out in non-corrosive capacitor working electrolytes to study the formation mechanism of nanopores in the anodic oxide films. Through comparative experiments, nanopores are found in the anodic films formed in the electrolytes after high-temperature storage (HTS) at 130 °C for 240 h. A comparison of the voltage−time curves suggests that the formation of nanopores results from the decrease in formation efficiency of anodic oxide films rather than the corrosion of the electrolytes. FT-IR and UV spectra analysis shows that carboxylate and ethylene glycol in electrolytes can easily react by esterification at high temperatures. Combining the electronic current theory and oxygen bubble mold effect, the change in electrolyte composition could increase the electronic current in the anodizing process. The electronic current decreases the formation efficiency of anodic oxide films, and oxygen bubbles accompanying electronic current lead to the formation of nanopores in the dense films. The continuous electronic current and oxygen bubbles are the prerequisites for the formation of porous anodic oxides rather than the traditional field-assisted dissolution model.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"34 9","pages":"Pages 2918-2927"},"PeriodicalIF":4.7,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142531402","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-01DOI: 10.1016/S1003-6326(24)66577-5
Rui-hao FU , Yang-jie WAN , Xun-fei XIONG , Dong-di YIN , Man-ping LIU , Bin JIANG , Zi-rong ZHOU , Yu-yang GAO , Ying ZENG
The Mg−Sn alloys, with basal or prismatic Mg2Sn laths, were employed to reveal the effect of precipitate orientation on twinning behavior quantitatively. The Mg−5wt.%Sn alloys with basal or prismatic Mg2Sn were compressed to study the twinning behaviors. Subsequently, an Orowan strengthening model was developed to quantitatively investigate the critical resolved shear stress (CRSS) increment of precipitates on twinning. The results revealed that the prismatic precipitates hindered the transfer and growth of tensile twins more effectively compared with the basal precipitates. The decreased proportion of tensile twins containing prismatic Mg2Sn might be attributed to a larger CRSS increment for tensile twins compared with that for basal precipitates. The obvious decreased twinning transfer in the alloy with prismatic Mg2Sn could be due to its higher geometrically necessary dislocation and enhanced CRSS of tensile twins. Notably, the prismatic precipitates have a better hindering effect on tensile twins during compression.
{"title":"Twinning behaviors of Mg−Sn alloy with basal or prismatic Mg2Sn","authors":"Rui-hao FU , Yang-jie WAN , Xun-fei XIONG , Dong-di YIN , Man-ping LIU , Bin JIANG , Zi-rong ZHOU , Yu-yang GAO , Ying ZENG","doi":"10.1016/S1003-6326(24)66577-5","DOIUrl":"10.1016/S1003-6326(24)66577-5","url":null,"abstract":"<div><div>The Mg−Sn alloys, with basal or prismatic Mg<sub>2</sub>Sn laths, were employed to reveal the effect of precipitate orientation on twinning behavior quantitatively. The Mg−5wt.%Sn alloys with basal or prismatic Mg<sub>2</sub>Sn were compressed to study the twinning behaviors. Subsequently, an Orowan strengthening model was developed to quantitatively investigate the critical resolved shear stress (CRSS) increment of precipitates on twinning. The results revealed that the prismatic precipitates hindered the transfer and growth of tensile twins more effectively compared with the basal precipitates. The decreased proportion of tensile twins containing prismatic Mg<sub>2</sub>Sn might be attributed to a larger CRSS increment for tensile twins compared with that for basal precipitates. The obvious decreased twinning transfer in the alloy with prismatic Mg<sub>2</sub>Sn could be due to its higher geometrically necessary dislocation and enhanced CRSS of tensile twins. Notably, the prismatic precipitates have a better hindering effect on tensile twins during compression.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"34 9","pages":"Pages 2800-2813"},"PeriodicalIF":4.7,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142531394","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-01DOI: 10.1016/S1003-6326(24)66578-7
Jian WANG , Chen WANG , Wei-feng RAO , In-ho JUNG
In order to develop the Mg−Zn−Ag metallic glasses (MGs) for biodegradable implant applications, the glass formation ability (GFA) and biocompatibility of Mg−Zn−Ag alloys were investigated using a combination of the calculation of phase diagrams (CALPHAD) and experimental measurements. High GFA potentiality of two alloy series, specifically Mg96−xZnxAg4 and Mg94−xZnxAg6 (x=17, 20, 23, 26, 29, 32, 35), was predicted theoretically and then substantiated through experimental testing. X-ray diffraction (XRD) and differential scanning calorimetry (DSC) techniques were used to evaluate the crystallinity, GFA, and crystallization characteristics of these alloys. The results showed that compositions between Mg73Zn23Ag4 and Mg64Zn32Ag4 for Mg96−xZnxAg4, Mg66Zn28Ag6 and Mg63Zn31Ag6 for Mg94−xZnxAg6 displayed a superior GFA. Notably, the GFA of the Mg96−xZnxAg4 series was better than that of the Mg94−xZnxAg6 series. Furthermore, the Mg70Zn26Ag4, Mg74Zn20Ag6, and Mg71Zn23Ag6 alloys showed acceptable corrosion rates, good cytocompatibility, and positive effects on cell proliferation. These characteristics make them suitable for applications in medical settings, potentially materials as biodegradable implants.
{"title":"Design and characterization of biodegradable Mg−Zn−Ag metallic glasses","authors":"Jian WANG , Chen WANG , Wei-feng RAO , In-ho JUNG","doi":"10.1016/S1003-6326(24)66578-7","DOIUrl":"10.1016/S1003-6326(24)66578-7","url":null,"abstract":"<div><div>In order to develop the Mg−Zn−Ag metallic glasses (MGs) for biodegradable implant applications, the glass formation ability (GFA) and biocompatibility of Mg−Zn−Ag alloys were investigated using a combination of the calculation of phase diagrams (CALPHAD) and experimental measurements. High GFA potentiality of two alloy series, specifically Mg<sub>96−<em>x</em></sub>Zn<sub><em>x</em></sub>Ag<sub>4</sub> and Mg<sub>94−<em>x</em></sub>Zn<sub><em>x</em></sub>Ag<sub>6</sub> (<em>x</em>=17, 20, 23, 26, 29, 32, 35), was predicted theoretically and then substantiated through experimental testing. X-ray diffraction (XRD) and differential scanning calorimetry (DSC) techniques were used to evaluate the crystallinity, GFA, and crystallization characteristics of these alloys. The results showed that compositions between Mg<sub>73</sub>Zn<sub>23</sub>Ag<sub>4</sub> and Mg<sub>64</sub>Zn<sub>32</sub>Ag<sub>4</sub> for Mg<sub>96−<em>x</em></sub>Zn<sub><em>x</em></sub>Ag<sub>4</sub>, Mg<sub>66</sub>Zn<sub>28</sub>Ag<sub>6</sub> and Mg<sub>63</sub>Zn<sub>31</sub>Ag<sub>6</sub> for Mg<sub>94−<em>x</em></sub>Zn<sub><em>x</em></sub>Ag<sub>6</sub> displayed a superior GFA. Notably, the GFA of the Mg<sub>96−<em>x</em></sub>Zn<sub><em>x</em></sub>Ag<sub>4</sub> series was better than that of the Mg<sub>94−<em>x</em></sub>Zn<sub><em>x</em></sub>Ag<sub>6</sub> series. Furthermore, the Mg<sub>70</sub>Zn<sub>26</sub>Ag<sub>4</sub>, Mg<sub>74</sub>Zn<sub>20</sub>Ag<sub>6</sub>, and Mg<sub>71</sub>Zn<sub>23</sub>Ag<sub>6</sub> alloys showed acceptable corrosion rates, good cytocompatibility, and positive effects on cell proliferation. These characteristics make them suitable for applications in medical settings, potentially materials as biodegradable implants.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"34 9","pages":"Pages 2814-2827"},"PeriodicalIF":4.7,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142531395","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-01DOI: 10.1016/S1003-6326(24)66582-9
Jun ZHANG , Zi-qi JIE , Miao-nan LIU , Min GUO
A spiral fluidity test model of superalloys with 10 mm in height and 3 mm in thickness was designed to evaluate the fluidity of two distinct Ni-based superalloys IN718 and IN939. The factors influencing fluidity are ascertained through comparative analysis utilizing methodologies such as JMatPro, differential scanning calorimetry and high-temperature confocal laser scanning microscopy. The results show that under identical testing conditions, the fluidity of the IN939 superalloy surpasses that of the IN718 superalloy. When subjected to the same temperature, the melt viscosity and surface tension of IN939 superalloy are considerably reduced relative to those of IN718 superalloy, which is beneficial to improving the melt fluidity. Furthermore, the liquidus temperature and solidification range for the IN939 superalloy are both smaller compared with those of the IN718 superalloy. This condition proves advantageous in delaying dendrite coherency, thereby improving fluidity.
{"title":"Versatile fluidity test model for cast superalloys and comparison between IN718 and IN939","authors":"Jun ZHANG , Zi-qi JIE , Miao-nan LIU , Min GUO","doi":"10.1016/S1003-6326(24)66582-9","DOIUrl":"10.1016/S1003-6326(24)66582-9","url":null,"abstract":"<div><div>A spiral fluidity test model of superalloys with 10 mm in height and 3 mm in thickness was designed to evaluate the fluidity of two distinct Ni-based superalloys IN718 and IN939. The factors influencing fluidity are ascertained through comparative analysis utilizing methodologies such as JMatPro, differential scanning calorimetry and high-temperature confocal laser scanning microscopy. The results show that under identical testing conditions, the fluidity of the IN939 superalloy surpasses that of the IN718 superalloy. When subjected to the same temperature, the melt viscosity and surface tension of IN939 superalloy are considerably reduced relative to those of IN718 superalloy, which is beneficial to improving the melt fluidity. Furthermore, the liquidus temperature and solidification range for the IN939 superalloy are both smaller compared with those of the IN718 superalloy. This condition proves advantageous in delaying dendrite coherency, thereby improving fluidity.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"34 9","pages":"Pages 2881-2888"},"PeriodicalIF":4.7,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142531399","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-01DOI: 10.1016/S1003-6326(24)66591-X
Wei-di ZHANG , Meng-jie TIAN , Wei SUN
A novel hydroxamic acid, N-hydroxy-9,10-epoxy group-octadecanamide (N-OH-9,10-O-ODA), was synthesised by modifying the structure of oleic acid. The carboxyl group of oleic acid was converted into an N-hydroxy amide group, and an epoxy group was introduced into its structure. N-OH-9,10-O-ODA was used as a novel collector in the flotation separation of spodumene from one of its associated gangue minerals, specifically albite. N-OH-9,10-O-ODA exhibits remarkable selectivity, with a stronger affinity for collecting spodumene particles compared to albite particles. Zeta potential measurements and X-ray photoelectron spectroscopic analysis reveal that the adsorption quantity of N-OH-9,10-O-ODA on spodumene surface is comparable to that on albite surface. First-principles calculations demonstrate the diverse adsorption configurations of N-OH-9,10-O-ODA on surfaces of spodumene and albite, leading to its distinct collecting abilities for spodumene and albite particles.
通过改变油酸的结构，合成了一种新型羟肟酸--N-羟基-9,10-环氧基十八烷酰胺（N-OH-9,10-O-ODA）。油酸的羧基被转化为一个 N-羟基酰胺基团，并在其结构中引入了一个环氧基团。N-OH-9,10-O-ODA被用作一种新型捕收剂，用于浮选分离黝帘石和其中一种伴生煤矸石矿物，特别是白云石。N-OH-9,10-O-ODA具有显著的选择性，与白云石颗粒相比，它对收集黝帘石颗粒具有更强的亲和力。Zeta 电位测量和 X 射线光电子能谱分析表明，N-OH-9,10-O-ODA 在黝帘石表面的吸附量与在白云石表面的吸附量相当。第一性原理计算证明了 N-OH-9,10-O-ODA在黝帘石和白云石表面的不同吸附构型，从而导致其对黝帘石和白云石颗粒的不同收集能力。
{"title":"A novel surfactant N-hydroxy-9,10-epoxy group-octadecanamide: Part II. Its synthesis and application in flotation separation of spodumene and albite","authors":"Wei-di ZHANG , Meng-jie TIAN , Wei SUN","doi":"10.1016/S1003-6326(24)66591-X","DOIUrl":"10.1016/S1003-6326(24)66591-X","url":null,"abstract":"<div><div>A novel hydroxamic acid, <em>N</em>-hydroxy-9,10-epoxy group-octadecanamide (<em>N</em>-OH-9,10-O-ODA), was synthesised by modifying the structure of oleic acid. The carboxyl group of oleic acid was converted into an <em>N</em>-hydroxy amide group, and an epoxy group was introduced into its structure. <em>N</em>-OH-9,10-O-ODA was used as a novel collector in the flotation separation of spodumene from one of its associated gangue minerals, specifically albite. <em>N</em>-OH-9,10-O-ODA exhibits remarkable selectivity, with a stronger affinity for collecting spodumene particles compared to albite particles. Zeta potential measurements and X-ray photoelectron spectroscopic analysis reveal that the adsorption quantity of <em>N</em>-OH-9,10-O-ODA on spodumene surface is comparable to that on albite surface. First-principles calculations demonstrate the diverse adsorption configurations of <em>N</em>-OH-9,10-O-ODA on surfaces of spodumene and albite, leading to its distinct collecting abilities for spodumene and albite particles.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"34 9","pages":"Pages 3002-3015"},"PeriodicalIF":4.7,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142531408","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-01DOI: 10.1016/S1003-6326(24)66580-5
Xin-nan WANG , Ming HAN , Fu-rong ZHANG , Guang-ming ZHAO , Zhi-shou ZHU
A new rhombohedral phase (termed R′) in a solution−aging-treated titanium alloy (Ti−4.5Al−6.5Mo−2Cr− 2Nb−1V−1Sn−1Zr, wt.%) was identified. Its accurate Bravais lattice parameters were determined by a novel unit cell reconstruction method based on conventional selected-area electron diffraction (SAED) technique. The orientation relationship between R′ phase and BCC phase was revealed. The results show that the R′ phase is found to have 48 crystallographically equivalent variants, resulting in rather complicated SAED patterns with high-order reflections. A series of in-situ SAED patterns were taken along both low- and high-index zone axes, and all weak and strong reflections arising from the 48 variants were properly explained and directly assigned with self-consistent Miller indices, confirming the presence of the rhombohedral phase. Additionally, some criteria were also proposed for evaluating the indexed results, which together with the Bravais lattice reconstruction method shed light on the microstructure characterization of even unknown phases in other alloys.
{"title":"A new rhombohedral phase and its 48 variants in β titanium alloy","authors":"Xin-nan WANG , Ming HAN , Fu-rong ZHANG , Guang-ming ZHAO , Zhi-shou ZHU","doi":"10.1016/S1003-6326(24)66580-5","DOIUrl":"10.1016/S1003-6326(24)66580-5","url":null,"abstract":"<div><div>A new rhombohedral phase (termed <em>R′</em>) in a solution−aging-treated titanium alloy (Ti−4.5Al−6.5Mo−2Cr− 2Nb−1V−1Sn−1Zr, wt.%) was identified. Its accurate Bravais lattice parameters were determined by a novel unit cell reconstruction method based on conventional selected-area electron diffraction (SAED) technique. The orientation relationship between <em>R′</em> phase and BCC phase was revealed. The results show that the <em>R′</em> phase is found to have 48 crystallographically equivalent variants, resulting in rather complicated SAED patterns with high-order reflections. A series of in-situ SAED patterns were taken along both low- and high-index zone axes, and all weak and strong reflections arising from the 48 variants were properly explained and directly assigned with self-consistent Miller indices, confirming the presence of the rhombohedral phase. Additionally, some criteria were also proposed for evaluating the indexed results, which together with the Bravais lattice reconstruction method shed light on the microstructure characterization of even unknown phases in other alloys.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"34 9","pages":"Pages 2849-2863"},"PeriodicalIF":4.7,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142531397","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
扫码关注我们
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号