Pub Date : 2024-12-01DOI: 10.1016/S1003-6326(24)66648-3
Jia-qi ZHANG , Chao CHEN , Dan LI , Zhao-wen GENG , Peng PAN , Guo-hua WANG , Ke-chao ZHOU , Jian-ling LIU
The influence of laser process parameters on the densification, phase composition, microstructure, and mechanical properties of Ta−33wt.%Ti alloy prepared via laser powder bed fusion (LPBF) was investigated. The results show that fully dense and homogeneous Ta−Ti parts can be obtained from LPBF with appropriate energy input. The cellular and dendritic structures were formed due to constitutional undercooling. Transmission electron microscopy (TEM) analysis showed that the lamellar α″ phase within the cellular structures preferred to concentrate at the cellular boundaries owing to the elemental micro-segregation in the solidification front. The samples fabricated under the energy density of 166.7 J/mm3 had a favorable ultimate tensile strength of 806 MPa and an excellent Young's modulus of 36.7 GPa.
{"title":"Effect of energy density on microstructure and mechanical properties of Ta−33Ti alloy prepared via laser powder bed fusion","authors":"Jia-qi ZHANG , Chao CHEN , Dan LI , Zhao-wen GENG , Peng PAN , Guo-hua WANG , Ke-chao ZHOU , Jian-ling LIU","doi":"10.1016/S1003-6326(24)66648-3","DOIUrl":"10.1016/S1003-6326(24)66648-3","url":null,"abstract":"<div><div>The influence of laser process parameters on the densification, phase composition, microstructure, and mechanical properties of Ta−33wt.%Ti alloy prepared via laser powder bed fusion (LPBF) was investigated. The results show that fully dense and homogeneous Ta−Ti parts can be obtained from LPBF with appropriate energy input. The cellular and dendritic structures were formed due to constitutional undercooling. Transmission electron microscopy (TEM) analysis showed that the lamellar <em>α″</em> phase within the cellular structures preferred to concentrate at the cellular boundaries owing to the elemental micro-segregation in the solidification front. The samples fabricated under the energy density of 166.7 J/mm<sup>3</sup> had a favorable ultimate tensile strength of 806 MPa and an excellent Young's modulus of 36.7 GPa.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"34 12","pages":"Pages 3919-3934"},"PeriodicalIF":4.7,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143200673","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}
An innovative process was proposed to recover metallic aluminum from secondary aluminum dross (SAD) by alkali roasting−water leaching. Thermodynamic calculations and experimental results were used to illustrate the phase transformation and reaction mechanism of the alkali roasting process. The leaching behaviors of roasted residue were also analyzed. Under optimal conditions, the aluminum extraction rate reached 93.08%. In addition, the kinetics of the water leaching of roasted products was studied through shrinking core model, and it was revealed that the leaching process of aluminum was in accord with diffusion control. The apparent activation energy of the leaching process was calculated to be 3.44 kJ/mol. Based on the above study, the underlying mechanism of the alkali roasting−water leaching was clarified.
{"title":"Intensifying recovery of metallic aluminum in secondary aluminum dross by alkali roasting−water leaching","authors":"Chen LI, Wei LIU, Fen JIAO, Liang-min DONG, Shi-yang LIU, Wen-qing QIN","doi":"10.1016/S1003-6326(24)66658-6","DOIUrl":"10.1016/S1003-6326(24)66658-6","url":null,"abstract":"<div><div>An innovative process was proposed to recover metallic aluminum from secondary aluminum dross (SAD) by alkali roasting−water leaching. Thermodynamic calculations and experimental results were used to illustrate the phase transformation and reaction mechanism of the alkali roasting process. The leaching behaviors of roasted residue were also analyzed. Under optimal conditions, the aluminum extraction rate reached 93.08%. In addition, the kinetics of the water leaching of roasted products was studied through shrinking core model, and it was revealed that the leaching process of aluminum was in accord with diffusion control. The apparent activation energy of the leaching process was calculated to be 3.44 kJ/mol. Based on the above study, the underlying mechanism of the alkali roasting−water leaching was clarified.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"34 12","pages":"Pages 4063-4074"},"PeriodicalIF":4.7,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143200742","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 : 2024-12-01DOI: 10.1016/S1003-6326(24)66651-3
Yan CHEN , Heng LI , Si-en LI , Gui-xun SUN , Liang ZHAO , Chao-quan HU , Wei ZHANG , Guo-dong TONG , Xue-gang CHEN , Shuang HAN , Hong-xiang ZONG , Jun LI , Jian-she LIAN
The effects of nanostructuring on the mechanical and dry-sliding wear behaviors of a FeCoNi medium- entropy alloy (MEA) were systematically investigated through nano-indentation and ball-on-disc wear tests. The results show that reducing the grain size down into the nano-meter regime, on the one hand, significantly elevates the hardness of the FeCoNi alloy, and on the other hand, facilitates the formation of a surface oxide layer. As a result, the wear rate of the nanocrystalline (NC) FeCoNi alloy is one order of magnitude lower than its coarse-grained counterpart. The NC FeCoNi alloy also exhibits obviously enhanced wear resistance compared with conventional NC Ni and Ni-based alloys in terms of both lower wear rate and friction coefficient. Such enhancement in tribological properties mainly stems from the improved strain hardening ability, owing to the inevitable concentration heterogeneity in MEA that imposes extra resistance to dislocation motion.
{"title":"Effects of nanostructuring on mechanical and tribological behaviors of FeCoNi medium-entropy alloy","authors":"Yan CHEN , Heng LI , Si-en LI , Gui-xun SUN , Liang ZHAO , Chao-quan HU , Wei ZHANG , Guo-dong TONG , Xue-gang CHEN , Shuang HAN , Hong-xiang ZONG , Jun LI , Jian-she LIAN","doi":"10.1016/S1003-6326(24)66651-3","DOIUrl":"10.1016/S1003-6326(24)66651-3","url":null,"abstract":"<div><div>The effects of nanostructuring on the mechanical and dry-sliding wear behaviors of a FeCoNi medium- entropy alloy (MEA) were systematically investigated through nano-indentation and ball-on-disc wear tests. The results show that reducing the grain size down into the nano-meter regime, on the one hand, significantly elevates the hardness of the FeCoNi alloy, and on the other hand, facilitates the formation of a surface oxide layer. As a result, the wear rate of the nanocrystalline (NC) FeCoNi alloy is one order of magnitude lower than its coarse-grained counterpart. The NC FeCoNi alloy also exhibits obviously enhanced wear resistance compared with conventional NC Ni and Ni-based alloys in terms of both lower wear rate and friction coefficient. Such enhancement in tribological properties mainly stems from the improved strain hardening ability, owing to the inevitable concentration heterogeneity in MEA that imposes extra resistance to dislocation motion.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"34 12","pages":"Pages 3963-3977"},"PeriodicalIF":4.7,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143200685","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 : 2024-11-01DOI: 10.1016/S1003-6326(24)66632-X
Jiang-kun FAN , Hong-ci YANG , Pei-zhe ZHANG , Jia-yu LI , Zhan-jie JING , Fu-long CHEN , De-gui LIU , Bin TANG , Hong-chao KOU , Jin-shan LI
The high-temperature oxidation behaviour of the Inconel 625 alloy at 950 °C was investigated after different ageing treatments. The effect of heat treatment on the oxidation behaviour of the alloy was analysed by characterizing the structure and elemental distribution before and after oxidation. The results reveal that the two ageing treatments at 650 °C for 500 h and at 750 °C for 400 h both reduced the oxidation mass gain. After oxidation at 950 °C, an outer Cr2O3 layer and inner Al2O3 are identified as the main oxidation products. Moreover, Nb2O5 and δ(Ni3Nb) phases precipitated after oxidation. The ageing treatments cause the rapid generation of a dense Cr2O3 layer on the surface, which prevents the diffusion of oxygen into the matrix, reduce the Al2O3 inward growth depth, and improve the oxidation resistance of the alloy.
{"title":"Mechanism of high temperature oxidation of Inconel 625 superalloy with various solution and ageing heat treatment processes","authors":"Jiang-kun FAN , Hong-ci YANG , Pei-zhe ZHANG , Jia-yu LI , Zhan-jie JING , Fu-long CHEN , De-gui LIU , Bin TANG , Hong-chao KOU , Jin-shan LI","doi":"10.1016/S1003-6326(24)66632-X","DOIUrl":"10.1016/S1003-6326(24)66632-X","url":null,"abstract":"<div><div>The high-temperature oxidation behaviour of the Inconel 625 alloy at 950 °C was investigated after different ageing treatments. The effect of heat treatment on the oxidation behaviour of the alloy was analysed by characterizing the structure and elemental distribution before and after oxidation. The results reveal that the two ageing treatments at 650 °C for 500 h and at 750 °C for 400 h both reduced the oxidation mass gain. After oxidation at 950 °C, an outer Cr<sub>2</sub>O<sub>3</sub> layer and inner Al<sub>2</sub>O<sub>3</sub> are identified as the main oxidation products. Moreover, Nb<sub>2</sub>O<sub>5</sub> and <em>δ</em>(Ni<sub>3</sub>Nb) phases precipitated after oxidation. The ageing treatments cause the rapid generation of a dense Cr<sub>2</sub>O<sub>3</sub> layer on the surface, which prevents the diffusion of oxygen into the matrix, reduce the Al<sub>2</sub>O<sub>3</sub> inward growth depth, and improve the oxidation resistance of the alloy.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"34 11","pages":"Pages 3662-3676"},"PeriodicalIF":4.7,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143175232","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 : 2024-11-01DOI: 10.1016/S1003-6326(24)66627-6
Yu-qing HE , Ri-chu WANG , Xiao-hui DUAN , Xiang PENG , Yu-si CHEN , Yan FENG
A biodegradable Mg-2Zn-0.4Sc-0.2Zr (ZK20-0.4Sc) alloy wire with a diameter of 0.5 mm was prepared by a combination of hot extrusion and cold-drawing. The average grain size of ZK20-0.4Sc alloy wire on the longitudinal section along the drawing direction is approximately 7.3 μm. The texture results show relatively strong 〈 〉 and weak 〈 〉 fiber texture components parallel to the drawing direction. The ZK20-0.4Sc alloy wire exhibits better mechanical properties with the tensile strength, yield strength and elongate of (329±2) MPa, (287±2) MPa and (14.2±0.5)%, respectively. The better mechanical properties are mainly attributed to the grain refinement strengthening, dislocation strengthening and precipitation strengthening. With the immersion time increasing to 14 d, the corrosion type transfers from filament corrosion and pitting corrosion to severe localized corrosion.
{"title":"Preparation, microstructure and degradation behavior of Mg-2Zn-0.4Sc-0.2Zr alloy wire","authors":"Yu-qing HE , Ri-chu WANG , Xiao-hui DUAN , Xiang PENG , Yu-si CHEN , Yan FENG","doi":"10.1016/S1003-6326(24)66627-6","DOIUrl":"10.1016/S1003-6326(24)66627-6","url":null,"abstract":"<div><div>A biodegradable Mg-2Zn-0.4Sc-0.2Zr (ZK20-0.4Sc) alloy wire with a diameter of 0.5 mm was prepared by a combination of hot extrusion and cold-drawing. The average grain size of ZK20-0.4Sc alloy wire on the longitudinal section along the drawing direction is approximately 7.3 μm. The texture results show relatively strong 〈\u0000\t\t\t\t<span><math><mtext>11</mtext><mover><mrow><mtext>2</mtext></mrow><mo>-</mo></mover><mtext>0</mtext></math></span>〉 and weak 〈\u0000\t\t\t\t<span><math><mtext>10</mtext><mover><mrow><mtext>1</mtext></mrow><mo>-</mo></mover><mtext>0</mtext></math></span>〉 fiber texture components parallel to the drawing direction. The ZK20-0.4Sc alloy wire exhibits better mechanical properties with the tensile strength, yield strength and elongate of (329±2) MPa, (287±2) MPa and (14.2±0.5)%, respectively. The better mechanical properties are mainly attributed to the grain refinement strengthening, dislocation strengthening and precipitation strengthening. With the immersion time increasing to 14 d, the corrosion type transfers from filament corrosion and pitting corrosion to severe localized corrosion.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"34 11","pages":"Pages 3585-3598"},"PeriodicalIF":4.7,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143174900","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 : 2024-11-01DOI: 10.1016/S1003-6326(24)66620-3
Fei-qi HUANG , Xiao-dan WANG , Lin-si-tong HUANG , Ju-rui MA , Yu-jun JIANG , Hua-shan LIU , Jin-liang HU , Hai-long PENG , Bo ZHANG
Molecular dynamics simulation was employed to investigate the dynamical and structural properties of Al-Mg melts with the Al concentration systematically changed. The results show that the viscosity of Al67Mg33 abnormally surpasses that of Al85Mg15 below 550 K, inconsistent with the tendency at high temperatures. The evolution of the icosahedral order population is found to account for this dynamic behavior. Structural analysis shows a preferred bonding between Al and Mg atoms in the nearest neighbor shells, while a repelling tendency between them in the second shells, leading to the prepeak emergence in the partial static structure factors. The formation of icosahedral clusters is constrained in the Al-rich compositions because of the lack of sufficient Mg atoms to stabilize the clusters geometrically. These results demonstrate the structural consequence through the interplay between geometric packing and chemical interaction. These findings are crucial to understanding the structure-dynamic properties in Al-Mg melts.
{"title":"Structure-controlled slow dynamics in Al-Mg melts","authors":"Fei-qi HUANG , Xiao-dan WANG , Lin-si-tong HUANG , Ju-rui MA , Yu-jun JIANG , Hua-shan LIU , Jin-liang HU , Hai-long PENG , Bo ZHANG","doi":"10.1016/S1003-6326(24)66620-3","DOIUrl":"10.1016/S1003-6326(24)66620-3","url":null,"abstract":"<div><div>Molecular dynamics simulation was employed to investigate the dynamical and structural properties of Al-Mg melts with the Al concentration systematically changed. The results show that the viscosity of Al<sub>67</sub>Mg<sub>33</sub> abnormally surpasses that of Al<sub>85</sub>Mg<sub>15</sub> below 550 K, inconsistent with the tendency at high temperatures. The evolution of the icosahedral order population is found to account for this dynamic behavior. Structural analysis shows a preferred bonding between Al and Mg atoms in the nearest neighbor shells, while a repelling tendency between them in the second shells, leading to the prepeak emergence in the partial static structure factors. The formation of icosahedral clusters is constrained in the Al-rich compositions because of the lack of sufficient Mg atoms to stabilize the clusters geometrically. These results demonstrate the structural consequence through the interplay between geometric packing and chemical interaction. These findings are crucial to understanding the structure-dynamic properties in Al-Mg melts.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"34 11","pages":"Pages 3471-3485"},"PeriodicalIF":4.7,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143174909","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 : 2024-11-01DOI: 10.1016/S1003-6326(24)66631-8
Shuai WANG , Jia-yun FENG , Wei WANG , Wen-chao CAO , Xin DING , Shang WANG , Yan-hong TIAN
The growth behavior of the complex intermetallic compounds (IMCs) formed at the interface of Cu/SnPbInBiSb high entropy alloy solder joints was explored. The growth inhibition mechanism of the IMCs at the Cu/SnPbInBiSb solid-liquid reaction interface was revealed. The results showed that the growth rate of the complex IMCs obviously decreased at the Cu/SnPbInBiSb solid-liquid reaction interface. The maximum average thickness of IMCs only reached up to 1.66 μm after reflowing at 200 °C for 10 min. The mechanism for the slow growth of the complex IMCs was analyzed into three aspects. Firstly, the high entropy of the liquid SnPbInBiSb alloy reduced the growth rate of the complex IMCs. Secondly, the distorted lattice of complex IMCs restrained the diffusion of Cu atoms. Lastly, the higher activation energy (40.9 kJ/mol) of Cu/SnPbInBiSb solid-liquid interfacial reaction essentially impeded the growth of the complex IMCs.
{"title":"Growth kinetics of interfacial intermetallic compounds formed in SnPbInBiSb high entropy alloy soldered joints on Cu substrates","authors":"Shuai WANG , Jia-yun FENG , Wei WANG , Wen-chao CAO , Xin DING , Shang WANG , Yan-hong TIAN","doi":"10.1016/S1003-6326(24)66631-8","DOIUrl":"10.1016/S1003-6326(24)66631-8","url":null,"abstract":"<div><div>The growth behavior of the complex intermetallic compounds (IMCs) formed at the interface of Cu/SnPbInBiSb high entropy alloy solder joints was explored. The growth inhibition mechanism of the IMCs at the Cu/SnPbInBiSb solid-liquid reaction interface was revealed. The results showed that the growth rate of the complex IMCs obviously decreased at the Cu/SnPbInBiSb solid-liquid reaction interface. The maximum average thickness of IMCs only reached up to 1.66 μm after reflowing at 200 °C for 10 min. The mechanism for the slow growth of the complex IMCs was analyzed into three aspects. Firstly, the high entropy of the liquid SnPbInBiSb alloy reduced the growth rate of the complex IMCs. Secondly, the distorted lattice of complex IMCs restrained the diffusion of Cu atoms. Lastly, the higher activation energy (40.9 kJ/mol) of Cu/SnPbInBiSb solid-liquid interfacial reaction essentially impeded the growth of the complex IMCs.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"34 11","pages":"Pages 3650-3661"},"PeriodicalIF":4.7,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143175202","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 : 2024-11-01DOI: 10.1016/S1003-6326(24)66625-2
Zhen JIANG , Chen-qi LEI , Jia-jun DING , Chun-nan ZHU , Dong-feng SHI , Jin ZHANG , Guo-qing WANG
The slip behavior and precipitation behavior of four Al-Cu-Li single crystals with varying orientations at different temperatures were investigated using electron backscattering diffraction (EBSD) and transmission electron microscopy (TEM). The maximum differences in yield strength and ductility of the single crystals at room temperature are 41.6% and 14.7%, respectively. This indicates that the mechanical properties are strongly influenced by the crystal orientation. Moreover, grains with varying orientations exhibit distinct slip characteristics, including slip homogenization, slip localization, and multiple slip. In single crystal SC1, slip localization primarily contributes to its inferior ductility compared to other grains. Nevertheless, during deformation at 250 °C, the distinct morphology and distribution of precipitates in the crystals are also correlated with orientation, which causes the increase in the maximum elongation difference to 20.8% in all selected single crystals. Notably, SC1, with a precipitate volume fraction of 2.65%, exhibits more severe slip localization compared to room temperature conditions, while SC2, with a precipitate volume fraction of 4.79%, demonstrates cross-slip characteristics, significantly enhancing the plastic deformation capacity of the Al-Cu-Li alloy.
{"title":"Synergistic effect of orientation and temperature on slip behavior and precipitation behavior of Al-Cu-Li single crystals","authors":"Zhen JIANG , Chen-qi LEI , Jia-jun DING , Chun-nan ZHU , Dong-feng SHI , Jin ZHANG , Guo-qing WANG","doi":"10.1016/S1003-6326(24)66625-2","DOIUrl":"10.1016/S1003-6326(24)66625-2","url":null,"abstract":"<div><div>The slip behavior and precipitation behavior of four Al-Cu-Li single crystals with varying orientations at different temperatures were investigated using electron backscattering diffraction (EBSD) and transmission electron microscopy (TEM). The maximum differences in yield strength and ductility of the single crystals at room temperature are 41.6% and 14.7%, respectively. This indicates that the mechanical properties are strongly influenced by the crystal orientation. Moreover, grains with varying orientations exhibit distinct slip characteristics, including slip homogenization, slip localization, and multiple slip. In single crystal SC1, slip localization primarily contributes to its inferior ductility compared to other grains. Nevertheless, during deformation at 250 °C, the distinct morphology and distribution of precipitates in the crystals are also correlated with orientation, which causes the increase in the maximum elongation difference to 20.8% in all selected single crystals. Notably, SC1, with a precipitate volume fraction of 2.65%, exhibits more severe slip localization compared to room temperature conditions, while SC2, with a precipitate volume fraction of 4.79%, demonstrates cross-slip characteristics, significantly enhancing the plastic deformation capacity of the Al-Cu-Li alloy.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"34 11","pages":"Pages 3554-3568"},"PeriodicalIF":4.7,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143174903","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 : 2024-11-01DOI: 10.1016/S1003-6326(24)66639-2
Hong-fei WU , Xiao-lin PAN , Ying-jie HE , Hai-yan YU
The effects of Ti- and Mg-bearing minerals on the crystal structure, morphology, particle size distribution, and formation mechanism of efficient desilication product of hydroandradite (HA) during hydrothermal conversion in a synthetic sodium aluminate solution were investigated via X-ray diffractometer, scanning electron microscope and particle size analyzer. During HA formation, anatase, rutile, and periclase dissolved in sodium aluminate solution engage in ion substitution reactions between Ti4+ and Si4+, and between Mg2+ and Ca2+, respectively. However, dissolved hydromagnesite cannot enter into the HA. The content of HA after the hydrothermal reactions changes slightly with the increase of anatase and periclase contents, but it notably decreases with increased quantities of rutile and hydromagnesite. Ti-bearing minerals reduce the particle size and enhance the specific surface area of HA, whereas Mg-bearing minerals exert the opposite effect. The morphology of HA with Ti- and Mg-bearing minerals changes from spherical particles to flocculent structure and hexagonal plate-like particles.
{"title":"Effects of Ti- and Mg-bearing minerals on hydrothermal formation of hydroandradite","authors":"Hong-fei WU , Xiao-lin PAN , Ying-jie HE , Hai-yan YU","doi":"10.1016/S1003-6326(24)66639-2","DOIUrl":"10.1016/S1003-6326(24)66639-2","url":null,"abstract":"<div><div>The effects of Ti- and Mg-bearing minerals on the crystal structure, morphology, particle size distribution, and formation mechanism of efficient desilication product of hydroandradite (HA) during hydrothermal conversion in a synthetic sodium aluminate solution were investigated via X-ray diffractometer, scanning electron microscope and particle size analyzer. During HA formation, anatase, rutile, and periclase dissolved in sodium aluminate solution engage in ion substitution reactions between Ti<sup>4+</sup> and Si<sup>4+</sup>, and between Mg<sup>2+</sup> and Ca<sup>2+</sup>, respectively. However, dissolved hydromagnesite cannot enter into the HA. The content of HA after the hydrothermal reactions changes slightly with the increase of anatase and periclase contents, but it notably decreases with increased quantities of rutile and hydromagnesite. Ti-bearing minerals reduce the particle size and enhance the specific surface area of HA, whereas Mg-bearing minerals exert the opposite effect. The morphology of HA with Ti- and Mg-bearing minerals changes from spherical particles to flocculent structure and hexagonal plate-like particles.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"34 11","pages":"Pages 3762-3776"},"PeriodicalIF":4.7,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143174914","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 : 2024-11-01DOI: 10.1016/S1003-6326(24)66640-9
Wen-jun WANG , Lan-bo LI , Xu LIU , Tie-chui YUAN , He-xin GAO
Fe2+ dissolution method and manual method were used to remove the anode slime and their effects on properties of cast Pb-0.6wt.%Ag anode and zinc electrowinning were compared. The results reveal that the Fe2+ dissolution method can avoid mechanical damage to the oxide film layer on the anode surface, which cannot be achieved by traditional manual method. This can lower the anode corrosion rate by 57.14%, thus reducing Pb contamination in electrolyte and zinc products. Meanwhile, compared with manual method, Fe2+ dissolution method can significantly improve the electrocatalytic activity of the anode and lower the initial power consumption of zinc electrowinning to 2720 kW·h/t after removing anode slime.
{"title":"Effects of anode slime removing by Fe2+ dissolution method on electrochemical properties of Pb-0.6%Ag anode and zinc electrowinning","authors":"Wen-jun WANG , Lan-bo LI , Xu LIU , Tie-chui YUAN , He-xin GAO","doi":"10.1016/S1003-6326(24)66640-9","DOIUrl":"10.1016/S1003-6326(24)66640-9","url":null,"abstract":"<div><div>Fe<sup>2+</sup> dissolution method and manual method were used to remove the anode slime and their effects on properties of cast Pb-0.6wt.%Ag anode and zinc electrowinning were compared. The results reveal that the Fe<sup>2+</sup> dissolution method can avoid mechanical damage to the oxide film layer on the anode surface, which cannot be achieved by traditional manual method. This can lower the anode corrosion rate by 57.14%, thus reducing Pb contamination in electrolyte and zinc products. Meanwhile, compared with manual method, Fe<sup>2+</sup> dissolution method can significantly improve the electrocatalytic activity of the anode and lower the initial power consumption of zinc electrowinning to 2720 kW·h/t after removing anode slime.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"34 11","pages":"Pages 3777-3788"},"PeriodicalIF":4.7,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143174915","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}
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