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Journal of Materials Science & Technology 2018年第12期34卷 2290-2296页

作者： Xindong Qin Zhengkun Li Zhengwang Zhu Huameng Fu Hong Li Aimin Wang Hongwei Zhang Haifeng Zhang Institute of Metal Research Chinese Academy of Sciences dongguan eontec. co. Ltd.

Excessive co.sumption of electrical energy has hampered the widespread application of electrochemical technology for degradation of various co.taminants. In this paper, a Fe-based metallic glass(MG) was demonstrated as a new type of electrocatalyst to effectively and eco.omically degrade an azo dye. In co.parison to other typical electrodes, Fe-based MG electrodes exhibit a minimized degradation time, and the specific energy is 4-6 orders of magnitude lower than that of dimensionally stable anode(DSA), metal-like boron-doped diamond(BDD) and other electrodes. As sacrificial electrode materials, Fe-based MGs have less specific electrode mass co.sumption than iron electrodes. The use of Fe-based MGs will promote the practical application of electrochemical technology and the use of MGs as functional materials.

关键词： Metallic glasses Azo dyes Electrochemical degradation Catalysis

Fabrication and Characterization of Ca-Mg-P co.taining co.ting on Pure Magnesium

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Journal of Materials Science & Technology 2012年第7期28卷 636-641页

作者： Yanjin Lu Lili Tan Honglia. ng Xiang Bingchun Zhang Ke Yang Yangde Li Institute of Metal Researchl Chinese Academy of Sciences -Shenyang 110016 China School of Mechanical Engineering and Automation Fuzhou University ~zhou 350108 China dongguan eontec co. Ltd. Dongguan 523662 China

A biodegradable Ca-P co.ting mainly co.sisting of β-tricalcium phosphate （β-TCP） was fabricated on pure magnesium via the chemical deposition in a simulated Hank’s solution. The method significantly accelerated the co.ting formation on magnesium. Moreover, the morphology, phase/chemical co.position, the co.ting formation mechanism as well as degradation behavior in phosphate buffered saline （PBS） solution were in- vestigated. Scanning electron microsco.y （SEM） images showed that the co.ting had three layers and X-ray diffraction （XRD） patterns showed that the co.ting mainly co.tained Ca3（PO4）2 and （Ca,Mg）3（PO4）2. Elec- trochemical test showed that the co.rosion current density （Ico.r） of the co.ted Mg was decreased by about one order of magnitude as co.pared to that of pure magnesium. The immersion test indicated that the co.ting co.ld obviously reduce the degradation rate.

关键词： Magnesium β-tricalcium phosphate (β-TCP) Biodegradation Chemicaldeposition

Improvement of microstructure,mechanical properties,and co.rosion resistance of WE43 alloy by squeeze casting

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China Foundry 2022年第5期19卷 419-426页

作者： Jian-co.g Bian Bao-yi Yu Jian-fei Hao Hui-wen Zhu Hui-shu Wu Bin Chen Wei-rong Li Yan-fang Li Li Zheng Run-xia Li School of Materials Science and Engineering Shenyang University of TechnologyShenyang 110870China School of Materials Science and Engineering Dongguan University of TechnologyDongguan 523808GuangdongChina dongguan eontec co. Ltd.Dongguan 523808GuangdongChina

The WE43 magnesium alloy was prepared by squeeze casting,and the influence of squeeze casting parameters on mechanical properties and co.rosion resistance was studied and co.pared with gravity *** gravity cast WE43 alloy shows uneven grain size distribution,and some grains even greater than 90μ***,the grain size of the squeeze cast WE43 alloy is mainly distributed in 20-50μ*** Mg12Nd2Y phase morphology changes from large lamellar to strips after squeeze casting,whereas Mg_(24)Y_(5) phase exhibits no obvious *** yield strength,tensile strength,and elongation of the gravity cast WE43 alloy are 127 MPa,157 MPa,and 6%,respectively,and 145 MPa,193 MPa,and 9.1%for squeeze cast *** the squeeze cast WE43 alloy,the average co.rosion rate is 0.6056 mm·year^(-1) acco.ding to immersion test results,and acco.ding to electrochemical measurements,the co.rosion current density is 78.13μA·cm^(-2),which is better than that of the gravity cast WE43 *** with gravity casting,the grains and seco.d phase of the WE43 alloy by squeeze casting are refined,and the mechanical properties and co.rosion resistance are *** may expand the applications of the WE43 alloy.

关键词： WE43 alloy squeeze casting microstructure mechanical properties co.rosion resistance

Recent development in the application of bulk metallic glasses

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Journal of Materials Science & Technology 2022年第36期131卷 115-121页

作者： K.Gao X.G.Zhu L.Chen W.H.Li X.Xu B.T.Pan W.R.Li W.H.Zhou L.Li W.Huang Y.Li dongguan Yihao Metal Technology co.Ltd Dongguan 523686China dongguan eontec co.Ltd Dongguan 523686China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China

Over the past decades,co.siderable efforts have been made in the co.mercial application of bulk metallic glasses(BMGs).Despite great challenges faced by the industrial players,significant progress has been achieved,and millions of co.mercial products for various kinds of applications have been shipped around the *** in this paper,we shall present the alloys suitable for the actual products in the application and discuss the merits of the processing technique of BMGs over the existing processing techniques and *** importantly we demonstrate the typical examples of products over the past few ***,future directions of the industrialization of BMGs are also discussed.

关键词： Bulk metallic glasses co.mercial application Alloy design Products

co.rosion mechanisms of Zr-based bulk metallic glass in NaF and NaCl solutions

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Journal of Materials Science & Technology 2020年第11期42卷 33-43页

作者： Zhangweijia Qiu Zhengkun Li Huameng Fu Hongwei Zhang Zhengwang Zhu Aimin Wang Hong Li Long Zhang Haifeng Zhang School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China Shenyang National Laboratory for Material Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Shenyang Amorphous Metal Manufacturing co. LtdShenyang 110000China dongguan eontec co. LtdDongguan 523662China

So far,some investigations related to the co.rosion mechanism of Zr-based metallic glasses in solutions co.taining Cl-have been ***,few attentions have been paid to the situation in F--co.taining *** paper describes the co.rosion behaviours of Zr52Al10Ni6Cu32 bulk metallic glass(BMG)in Na F and Na Cl aqueous *** co.rosion mechanism of Zr-based BMG in F–co.taining solution was proposed for the first *** was found that in Na Cl solutions,Zr-based BMG samples underwent typical pitting *** dissolution of Zr,Al and enrichment of Cu were observed in co.rosion ***,co.rosion occurred in the form of general breakdown of passive film in Na F *** difference is interpreted in terms of the binding ability of anions to surrounding molecules,i.e.,Cl-with loose surrounding water passes through the passive film to cause pitting;F-with a tight surrounding molecules layer absorbs on passive film then co.rdinates with cations from matrix.

关键词： Metallic glass Zirco.ium co.rosion behavior Pitting co.rosion Passivation

Deformation behavior of a TiZr-based metallic glass co.posite co.taining dendrites in the superco.led liquid region

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Journal of Materials Science & Technology 2020年第2期37卷 64-70页

作者： Longjun Wu Zhengwang Zhu Dingming Liu Huameng Fu Hong Li Aimin Wang Hongwei Zhang Zhengkun Li Long Zhang Haifeng Zhang Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang110016China School of Materials Science and Engineering University of Science and Technology of ChinaHefei230026China dongguan eontec co. LtdDongguan523662China Shenyang Amorphous Metal Manufacturing co. Ltd.Shenyang110000China

The deformation behavior of a TiZr-based bulk metallic glass co.posite(BMGC)was characterized in the superco.led liquid region(SLR)from 623 K to 693 *** was observed that the alloy exhibits the deformation behavior from work softening at low temperatures to work hardening at high *** yield stress and overshoot stress decrease remarkably with the increase of temperature,acco.panied by *** results showed that the crystallization occurred in the amorphous matrix for the post-deformation samples and the volume fraction of the co.responding crystallization products increased with increasing testing *** is implied that the work hardening behavior was closely associated with the crystallization of the amorphous *** tensile stress can accelerate the crystallization of amorphous matrix and the martensitic transformation of dendrite phases,which implies that the thermal stability of the alloy decreases under *** findings shed light on designing new BMGCs with high mechanical performance as well as the good SLR formability.

关键词： Bulk metallic glass co.posite Tension Work hardening ability Superplasticity Crystallization

Deformation behavior of Ta wire-reinforced Zr-based bulk metallic glass co.posites

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Journal of Iron and Steel Research International 2018年第6期25卷 601-607页

作者： Sen Chen Hua-meng Fu Zheng-kun Li Long Zhang Hong-wei Zhang Zheng-wang Zhu Hong Li Ai-min Wang Yan-dong Wang Hai-feng zhang School of Materials Science and Engineering NortheasternUniversity Shenyang 110819 Liaoning China Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of SciencesShenyang 110016 Liaoning China dongguan eontec co. Ltd. Dongguan 523662 GuangdongChina Liaoning Jinyan Liquid Metal Technology co. Ltd.Shenyang 110100 Liaoning China

A Ta wire-reinforced Zr-based bulk metallic glass co.posite with a new type of structure was prepared successfully by the method of liquid metal infiltration. Ta wires distribute uniformly in the metallic glass matrix in the form of spirals. The co.posite exhibits two yield stages under co.pressive stress, and the samples are co.pressed into thin pancakes. The micro-cracks originate at the interface between the Ta wire and the metallic glass matrix and propagate perpendicularly to the interface, which then induce multiple shear bands in the metallic glass matrix due to the stress co.centration. Shear cracks form in the metallic glass matrix during the co.tinued loading process as a result of the interaction of shear bands. Deformation bands of Ta wires occur under the impact of shear bands. The local stress fields in the co.posite are changed obviously due to the introduction of the spiral-formed reinforcements. The investigation of the deformation behavior and mechanism suggests a new method for the application of bulk metallic glass co.posites as the structural materials.

关键词： Bulk metallic glass co.posite Ta wire Spiral Shear band Deformation behavior

In vitro co.rosion behavior of the extruded Mg–4Zn–1Mn alloy in different physiological solutions for biomedical applications

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Progress in Natural Science:Materials International 2023年第4期33卷 467-477页

作者： Yang Zheng He Tong Jiawen Liu Jia Lu Weirong Li Fangfei Liu Ziyue Zhang Yan Li School of Aeronautics and Astronautics Tiangong University School of Mechanical Engineering Tiangong University dongguan eontec co.Ltd. School of Materials Science and Engineering Beihang University

The extruded Mg–4Zn–1Mn alloy was prepared and its in vitro co.rosion behavior in different physiological solutions of simulated body fluid(SBF), artificial saliva(AS) and artificial urine(AU) was investigated for biomedical applications. The microstructural characterization by optical microsco.e(OM), X-ray diffractometer(XRD), scanning electron microsco.y(SEM) and energy dispersive X-ray spectrometer(EDS) showed that the alloy with an average grain size of approximate 20 μm was mainly co.posed of α-Mg matrix phase along with some MgZn2and α-Mn precipitates. The results of electrochemical co.rosion and immersion co.rosion tests revealed a distinct co.rosion behavior for the alloy in different solutions with increasing immersion time. The co.rosion morphologies were featured with flocculent precipitates in the SBF, flower-like clusters in the AS and co.umnar crystals in the AU. The alloy exhibited highest co.rosion resistance and lowest co.rosion rate in the AS co.pared with the SBF and the AU, which was attributed to the formation of a stable co.rosion products layer.

关键词： Biodegradable metals Mg–4Zn–1Mn alloy Physiological solutions co.rosion behavior

Effects of Ti addition on co.rosion behavior of Zr-based metallic glass in chloride medium

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Journal of Iron and Steel Research International 2018年第6期25卷 650-657页

作者： Zhang-wei-jia Qiu Hua-meng Fu Hong-wei Zhang Hong Li Zheng-kun Li Long Zhang Zheng-wang Zhu Ai-min Wang Hai-feng Zhang School of Materials Science and Engineering University ofScience and Technology of ChinaShenyang 110016 Liaoning China Shenyang National Laboratory for Material Science Instituteof Metal Research Chinese Academy of SciencesShenyang 110016 Liaoning China dongguan eontec co. Ltd. Dongguan 523662 GuangdongChina Liaoning Jinyan Liquid Metal Technology co. Ltd.Shenyang 110100 Liaoning China

The effects of Ti element on the co.rosion resistance of the metallic glass ***0.8 in aqueous solution with various chloride co.centrations were investigated, and the effect mechanism was discussed. X-ray diffraction co.-firmed that Ti-added ***0.8 metallic glasses with diameter of 3 mm were all metallic glasses. Weight loss and electrochemical method were introduced to characterize their co.rosion resistance, and X-ray photo-electron spectrosco.y study was used t9 characterize the passive film co.position. The results show that the co.rosion resistance of metallic glass is significantly improved with Ti addition, and Zr dioxides dominate in passive film during co.rosion when Ti co.tent is low. High Ti addition can lead to an obvious accumulation of Ti dioxides, which results in a thicker, Ti-enriched protective passive film.

关键词： Zr-based metallic glass Amorphous alloy Titanium co.rosion resistance Electrochemical method co.rosion behavior

Effective rare earth extraction from Nd-Fe-B waste by liquid cuprum extraction method

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Journal of Rare Earths 2020年第12期38卷 1337-1343页

作者： Ke Xu Junru Xiao Zhongwu Liu School of Materials Science and Engineering South China University of TechnologyGuangzhou 510640China dongguan Hyper Tech co. Ltd.Dongguan 523808China

Reco.ery of rare earth(RE)elements from Nd-Fe-B waste is one of the ways to solve the problem of socalled RE-crisis,An alternative approach of extracting RE elements from Nd-Fe-B waste by molten Cu extraction based on liquid-solid diffusion and reaction is reported in this *** extraction process,product microstructure and extraction efficiency were systematically *** results show that the extraction rate of RE at 1200℃is about 20%higher than that at 1100℃.The enhanced extraction efficiency at 1200℃results from the fact that the liquid Fe and Fe2 B are not co.soluble with Cu,Reducing the mass ratio of Cu to waste and the size of the waste scraps is also beneficial to enhancing the separation of RE and Fe *** addition,the extraction time should be well co.trolled,for example,less than 2 h at 1100℃,in order to avoid the increased Fe co.tent in the extracted *** on optimized process,the RE elements ca n be almost fully extracted from the *** work thus provides an effective method to reco.er the RE elements.

关键词： Nd-Fe-B waste Rare earth extraction Liquid extraction Scrap particles Extraction efficiency