Transactions of Nonferrous Metals Society of China最新文献_第6页

Enhanced mechanical and electrical properties of multi-walled carbon nanotubes reinforced Cu/Ti3SiC2/C nanocomposites via high-pressure torsion

IF 4.7 1区材料科学

Transactions of Nonferrous Metals Society of China Pub Date : 2024-12-01 DOI: 10.1016/S1003-6326(24)66654-9

Zi-xuan WU , Pei-fan ZHANG , Xiao-song JIANG , Hong-liang SUN , Yan-jun LI , Pål CHRISTIAN , Liu YANG

{"title":"Enhanced mechanical and electrical properties of multi-walled carbon nanotubes reinforced Cu/Ti3SiC2/C nanocomposites via high-pressure torsion","authors":"Zi-xuan WU , Pei-fan ZHANG , Xiao-song JIANG , Hong-liang SUN , Yan-jun LI , Pål CHRISTIAN , Liu YANG","doi":"10.1016/S1003-6326(24)66654-9","DOIUrl":"10.1016/S1003-6326(24)66654-9","url":null,"abstract":"<div><div>In order to achieve combined mechanical and electrical properties, multi-walled carbon nanotubes (MWCNTs) reinforced Cu/Ti<sub>3</sub>SiC<sub>2</sub>/C nanocomposites were further processed by high-pressure torsion (HPT). The maximum microhardness values of central and edge from the composites with 1 wt.% MWCNTs reached HV 130.0 and HV 363.5, which were 43.9% and 39.5% higher than those of the original samples, respectively. With the same content of MWCNTs, its electrical conductivity achieved 3.42×10<sup>7</sup> S/m, which was increased by 78.1% compared with that of original samples. The synergistic improvement of mechanical and electrical properties is attributed to the obtained microstructure with increased homogenization and refinement, as well as improved interfacial bonding and reduced porosity. The strengthening mechanisms include dispersion and refinement strengthening for mechanical properties, as well as reduced electron scattering for electrical properties.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"34 12","pages":"Pages 4005-4019"},"PeriodicalIF":4.7,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143200676","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}

引用次数: 0

Improvement of crystal structure and electrical performance of NASICON-type NaTi2(PO4)3 solid electrolyte by doping Cr3+ ions

IF 4.7 1区材料科学

Transactions of Nonferrous Metals Society of China Pub Date : 2024-12-01 DOI: 10.1016/S1003-6326(24)66655-0

Cheng-jian WEN, Zhi-wei LUO, Xin-yu LIU, Ju-xia TONG, Pan HE, An-xian LU

{"title":"Improvement of crystal structure and electrical performance of NASICON-type NaTi2(PO4)3 solid electrolyte by doping Cr3+ ions","authors":"Cheng-jian WEN, Zhi-wei LUO, Xin-yu LIU, Ju-xia TONG, Pan HE, An-xian LU","doi":"10.1016/S1003-6326(24)66655-0","DOIUrl":"10.1016/S1003-6326(24)66655-0","url":null,"abstract":"<div><div>A series of Cr<sup>3+</sup>-substituted Na<sub>1+<em>x</em></sub>Ti<sub>2−<em>x</em></sub>Cr<sub><em>x</em></sub>P<sub>3</sub>O<sub>12</sub> (<em>x</em>=0.1, 0.2, 0.3, 0.4, 0.5, molar fraction) solid electrolytes were prepared by the solid-phase reaction method. The effects of Cr<sup>3+</sup> ions on the phase composition, microstructure, and electrochemical ion conductivity of Na-based conductors were studied using X-ray powder diffraction, field emission scanning electron microscopy, and AC impedance measurement. The results show that the main crystal phase of NaTi<sub>2</sub>(PO<sub>4</sub>)<sub>3</sub> is formed in the solid electrolytes. The substitution of Ti<sup>4+</sup> sites by 15 at.% Cr<sup>3+</sup> ions contributes to the enhancement of electrical conductivity, which is attributed to the combined effect of suppressing the formation of impurity phases, broadening ion channels, and improving the bonding degree of grains. Na<sub>1.3</sub>Ti<sub>1.7</sub>Cr<sub>0.3</sub>P<sub>3</sub>O<sub>12</sub> electrolyte can obtain the best ionic conductivity of 6.13×10<sup>−6</sup> S/cm at room temperature, which is 8 times that of the undoped NaTi<sub>2</sub>(PO<sub>4</sub>)<sub>3</sub> electrolyte.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"34 12","pages":"Pages 4020-4031"},"PeriodicalIF":4.7,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143200747","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}

引用次数: 0

Microstructure evolution and hot workability of in-situ synthesized Ti2AlC/TiAl composite

IF 4.7 1区材料科学

Transactions of Nonferrous Metals Society of China Pub Date : 2024-12-01 DOI: 10.1016/S1003-6326(24)66647-1

Yu-peng WANG , Teng-fei MA , Lei LI , Long-long DONG , Wang-tu HUO , Yu-sheng ZHANG , Lian ZHOU

{"title":"Microstructure evolution and hot workability of in-situ synthesized Ti2AlC/TiAl composite","authors":"Yu-peng WANG , Teng-fei MA , Lei LI , Long-long DONG , Wang-tu HUO , Yu-sheng ZHANG , Lian ZHOU","doi":"10.1016/S1003-6326(24)66647-1","DOIUrl":"10.1016/S1003-6326(24)66647-1","url":null,"abstract":"<div><div>The in-situ micro-nano Ti<sub>2</sub>AlC particles reinforced TiAl (Ti<sub>2</sub>AlC/TiAl) composite was fabricated using spark plasma sintering. The hot workability of Ti<sub>2</sub>AlC/TiAl composite was studied, and the effect of micro-nano particles on flow stress and dynamic recrystallization of composite was discussed. The results showed that the micro-nano Ti<sub>2</sub>AlC particles included strengthening and softening effects during hot deformation, resulting in the fact that the Ti<sub>2</sub>AlC/TiAl composite exhibited a higher flow stress and more sufficient dynamic recrystallization. The strengthening effect was mainly attributed to the Ti<sub>2</sub>AlC particles induced refinement strengthening and hindered dislocation motion at the initial stage. Moreover, the precipitation of nano-TiCr<sub>2</sub> particles induced by stress concentration during hot deformation also contributed to higher flow stress via impeding dislocation motion. Meanwhile, the refined microstructure and dislocation pile-up caused by micro-nano particles during deformation provided more nucleation sites for dynamic recrystallization, which significantly promoted the dynamic recrystallization of the second stage. The present results reveal that the Ti<sub>2</sub>AlC/TiAl composite exhibited excellent hot workability, which is important to promote the application of TiAl alloys.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"34 12","pages":"Pages 3905-3918"},"PeriodicalIF":4.7,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143200898","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}

引用次数: 0

Microstructure and mechanical properties of directly thixoforged complex box-shape 2A14 part with large wall-thickness difference

IF 4.7 1区材料科学

Transactions of Nonferrous Metals Society of China Pub Date : 2024-12-01 DOI: 10.1016/S1003-6326(24)66645-8

Ying-ze LIU , Ju-fu JIANG , Ying ZHANG , Min-jie HUANG , Jian DONG , Ying WANG

引用次数: 0

Microstructure and mechanical properties of complex-shaped 7075 aluminium alloy prepared using modified polyoxymethylene-based feedstock

IF 4.7 1区材料科学

Transactions of Nonferrous Metals Society of China Pub Date : 2024-12-01 DOI: 10.1016/S1003-6326(24)66644-6

Heng ZOU, Meng-xiong CHEN, Yang FU, Hui-wen XIONG, Lei ZHANG, Ke-chao ZHOU

{"title":"Microstructure and mechanical properties of complex-shaped 7075 aluminium alloy prepared using modified polyoxymethylene-based feedstock","authors":"Heng ZOU, Meng-xiong CHEN, Yang FU, Hui-wen XIONG, Lei ZHANG, Ke-chao ZHOU","doi":"10.1016/S1003-6326(24)66644-6","DOIUrl":"10.1016/S1003-6326(24)66644-6","url":null,"abstract":"<div><div>Additives of dioctyl phthalate (DOP), ethylene bis-stearomide (EBS), and epoxy (EP) were selected to modify the surface of 7075 Al alloy powder. Functional groups in DOP and EBS form hydrogen bonds with hydroxyl groups on the surface of Al powder. Additionally, the epoxy groups in the epoxy resin undergo ring-opening reactions with hydroxyl groups. The above interactions increased the compatibility between alloy powder and polyoxymethylene (POM). After sintering, samples containing DOP and EP presented high contents of C and O, while the part with EBS additive exhibited the lowest contents of 0.006 wt.% C and 0.604 wt.% O, respectively. Excessive C tends to accumulate at grain boundaries during sintering. Concurrently, excessive O causes secondary oxidation of aluminium alloy powder, inhibiting the sintering densification process. Therefore, the densities of the samples containing DOP and EP were only 85.52% and 79.01%, respectively. In contrast, using EBS as an additive, high-quality aluminium alloy parts were achieved, with a relative density of 97.64% and a tensile strength of 193 MPa.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"34 12","pages":"Pages 3862-3875"},"PeriodicalIF":4.7,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143200893","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}

引用次数: 0

Research and development of advanced copper matrix composites

IF 4.7 1区材料科学

Transactions of Nonferrous Metals Society of China Pub Date : 2024-12-01 DOI: 10.1016/S1003-6326(24)66641-0

Zhu XIAO , Yan-jun DING , Ze-jun WANG , Yan-lin JIA , Yan-bin JIANG , Shen GONG , Zhou LI

引用次数: 0

Modulation of microstructure and properties of Cu−Ni−Sn alloy by addition of trace Ti

IF 4.7 1区材料科学

Transactions of Nonferrous Metals Society of China Pub Date : 2024-12-01 DOI: 10.1016/S1003-6326(24)66652-5

Ying-lin HU , Zi-luo CHENG , Xiao-na LI , Zhu-min LI , Yuan-di HOU , Min LI , Mian YANG , Yue-hong ZHENG , Chuang DONG

{"title":"Modulation of microstructure and properties of Cu−Ni−Sn alloy by addition of trace Ti","authors":"Ying-lin HU , Zi-luo CHENG , Xiao-na LI , Zhu-min LI , Yuan-di HOU , Min LI , Mian YANG , Yue-hong ZHENG , Chuang DONG","doi":"10.1016/S1003-6326(24)66652-5","DOIUrl":"10.1016/S1003-6326(24)66652-5","url":null,"abstract":"<div><div>The segregation of Sn and discontinuous precipitation at grain boundaries are detrimental to the strength, ductility, and machinability of the Cu−Ni−Sn alloy. A strategy to solve the above problems is multi-component composition design by introducing strong enthalpic interaction element. In this work, a series of Cu<sub>80</sub>Ni<sub>15</sub>Sn<sub>5−<em>x</em></sub>Ti<sub><em>x</em></sub> (at.%) alloys were designed by cluster-plus-glue-atom model, and the effects of Ti content on the microstructure and properties of the alloys were systematically investigated using TEM and other analysis methods. The results demonstrate that Ti can effectively inhibit the segregation and discontinuous precipitation while promoting continuous precipitation to improve the high-temperature stability of the alloys. As the Ti content increases, the distribution of Ti changes from uniform distribution to predominant precipitation. The hardness and conductivity of the alloy exceed those of the C72900 (Cu−15Ni−8Sn (wt.%)) commercial alloy and the Cu<sub>80</sub>Ni<sub>15</sub>Sn<sub>5</sub> (at.%) reference alloy when Ti is in the solution state.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"34 12","pages":"Pages 3978-3991"},"PeriodicalIF":4.7,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143200686","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}

引用次数: 0

Influence of axial stress on failure characteristics of deep arched hard rock roadway

IF 4.7 1区材料科学

Transactions of Nonferrous Metals Society of China Pub Date : 2024-12-01 DOI: 10.1016/S1003-6326(24)66656-2

Kang PENG, Ren-zhi LAI, Song LUO, Xi-bing LI

引用次数: 0

Additive manufacturing of pure copper via vat photopolymerization with slurry

IF 4.7 1区材料科学

Transactions of Nonferrous Metals Society of China Pub Date : 2024-12-01 DOI: 10.1016/S1003-6326(24)66653-7

An-liang YE , Meng WANG , Yan-bin JIANG , Xiao-zan WU , Chao-qun PENG , Jin HE , Xiao-feng WANG

{"title":"Additive manufacturing of pure copper via vat photopolymerization with slurry","authors":"An-liang YE , Meng WANG , Yan-bin JIANG , Xiao-zan WU , Chao-qun PENG , Jin HE , Xiao-feng WANG","doi":"10.1016/S1003-6326(24)66653-7","DOIUrl":"10.1016/S1003-6326(24)66653-7","url":null,"abstract":"<div><div>Stereolithography (SLA) combined with a two-step post-processing method “oxidation−reduction” was developed to fabricate pure copper with high complexity. The copper slurries for SLA were prepared, and particularly the influence of volume fraction of copper on the properties of copper slurries was investigated. In the two-step post-treatment process, organics were removed by oxidation and copper powder was oxidized simultaneously, and then the oxidized copper was reduced into highly reactive copper particles, improving the sintering activity of the copper green body and enhancing the relative density of the sintered part. The results show that curing depth of the copper slurries decreased with the increase of volume fraction of copper. The viscosity of the pure copper slurry rises exponentially as the volume fraction of copper exceeded 50%. The highest volume fraction of pure copper slurry for SLA is 55%. The specimens exhibited an increase in hardness and electrical conductivity with the increase of volume fraction of copper. Specifically, the maximum values of hardness and conductivity of samples with 55 vol.% copper were HV 52.7 and 57.1%(IACS), respectively.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"34 12","pages":"Pages 3992-4004"},"PeriodicalIF":4.7,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143200672","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}

引用次数: 0

Enhancing high-temperature oxidation resistance of nickel superalloy obtained by laser powder bed fusion via reactive electric spark treatment

IF 4.7 1区材料科学

Transactions of Nonferrous Metals Society of China Pub Date : 2024-12-01 DOI: 10.1016/S1003-6326(24)66649-5

S.K. MUKANOV, M.I. PETRZHIK, A.E. KUDRYASHOV, E.A. NAUMOVA, F.A. BASKOV, P.A. LOGINOV, E.A. LEVASHOV

{"title":"Enhancing high-temperature oxidation resistance of nickel superalloy obtained by laser powder bed fusion via reactive electric spark treatment","authors":"S.K. MUKANOV, M.I. PETRZHIK, A.E. KUDRYASHOV, E.A. NAUMOVA, F.A. BASKOV, P.A. LOGINOV, E.A. LEVASHOV","doi":"10.1016/S1003-6326(24)66649-5","DOIUrl":"10.1016/S1003-6326(24)66649-5","url":null,"abstract":"<div><div>The high-temperature oxidation resistance of the nickel superalloy prepared by the laser powder bed fusion (LPBF) has been significantly increased as a result of in-situ formation of a thermal barrier layer (<em>α</em>-Al<sub>2</sub>O<sub>3</sub> + CaMoO<sub>4</sub>) during oxidative annealing of surface layers modified by electric spark treatment (EST). The reactive EST of the LPBF-built items based on nickel EP741NP alloy was carried out with low-melting Al−12%Si, Al−6%Ca−0.6%Si and Al−7%Ca−1%Mn electrodes. It was found that under EST done by Al−7%Ca−1%Mn electrode an intermetallic (<em>β</em>-NiAl + <em>γ’</em>-Ni<sub>3</sub>Al) 15 μm-thick layer reinforced by spherical oxide (CaMe)O nanoparticles was formed. Formation of that structure increases the wear resistance of LPBF nickel superalloy by 4.5 times. Further oxidative annealing at 1000 °C leads to a formation of continuous two-layered coating with an inner layer of <em>α</em>-Al<sub>2</sub>O<sub>3</sub> and an outer layer of CaMoO<sub>4</sub>, which together act as an effective barrier preventing the diffusion of oxygen into the bulk of the superalloy.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"34 12","pages":"Pages 3935-3948"},"PeriodicalIF":4.7,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143200674","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}

引用次数: 0