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Статті в журналах з теми "Pure mg"

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Автор: Grafiati

Опубліковано: 10 грудня 2022

Оновлено: 29 січня 2023

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1

Song, Myoung Youp, Young Jun Kwak, Seong Ho Lee, and Hye Ryoung Park. "Hydrogen storage properties of pure Mg." Korean Journal of Metals and Materials 52, no. 4 (April 5, 2014): 293–97. http://dx.doi.org/10.3365/kjmm.2014.52.4.293.

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2

Song, Myoung Youp, Young Jun Kwak, Seong Ho Lee, and Hye Ryoung Park. "Comparison of hydrogen storage properties of pure Mg and milled pure Mg." Bulletin of Materials Science 37, no. 4 (June 2014): 831–35. http://dx.doi.org/10.1007/s12034-014-0013-6.

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3

Kondoh, Katsuyoshi, Masashi Kawakami, Hisashi Imai, Junko Umeda, and Hidetoshi Fujii. "Wettability of pure Ti by molten pure Mg droplets." Acta Materialia 58, no. 2 (January 2010): 606–14. http://dx.doi.org/10.1016/j.actamat.2009.09.039.

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4

Gottstein, Günter, and T. Al Samman. "Texture Development in Pure Mg and Mg Alloy AZ31." Materials Science Forum 495-497 (September 2005): 623–32. http://dx.doi.org/10.4028/www.scientific.net/msf.495-497.623.

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Анотація:

Texture evolution in pure Mg and Mg alloy AZ31 during deformation and annealing was investigated. The poor low temperature ductility can be attributed to both, insufficient shear systems and unfavorable deformation geometry. Static recrystallization was shown to proceed discontinuously despite little texture change. High temperature deformation was accompanied by dynamic recrystallization with similar texture development as during static recrystallization.

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5

Kim, Young-Min, Nack J. Kim, and Byeong-Joo Lee. "Atomistic Modeling of pure Mg and Mg–Al systems." Calphad 33, no. 4 (December 2009): 650–57. http://dx.doi.org/10.1016/j.calphad.2009.07.004.

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6

Das, Hrishikesh, Bharat Gwalani, Xiaolong Ma, and Piyush Upadhyay. "Metallurgical joining of immiscible system: Pure Mg and pure Fe." Materials Characterization 187 (May 2022): 111821. http://dx.doi.org/10.1016/j.matchar.2022.111821.

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7

Song, Myoung Youp, Young Jun Kwak, Seong Ho Lee, and Hye Ryoung Park. "Comparison of Hydrogen Storage Properties of Pure MgH2 and Pure Mg." Korean Journal of Metals and Materials 52, no. 9 (September 5, 2014): 689–93. http://dx.doi.org/10.3365/kjmm.2014.52.9.689.

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8

LIU, ZHENMIN, and WEI GAO. "SCRATCH ADHESION EVALUATION OF ELECTROLESS NICKEL PLATING ON Mg AND Mg ALLOYS." International Journal of Modern Physics B 20, no. 25n27 (October 30, 2006): 4637–42. http://dx.doi.org/10.1142/s0217979206041811.

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Анотація:

Magnesium ( Mg ) and its alloys are being used as structural components in industry because of their high strength-to-weight ratio and relatively high stiffness. A shortcoming of Mg based alloys is their poor corrosion and wear resistance. Therefore, coatings or surface treatment are needed for protection purpose. This paper reports our work on electroless plating of Ni - P on Mg alloys. Pure Mg , AZ31 and AZ91 Mg alloys were used as the substrates to investigate friction and adhesion properties of the electroless Ni - P coatings. The maximum friction coefficient (~0.3) was found on the electroless nickel coating of pure Mg substrate. The adhesion strengths of the coatings on AZ31 and AZ91 Mg alloys are higher than that on pure Mg . The critical load (a measure of adhesion strength) of AZ31 reached 13.1 N .

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9

Liu, Yushun, Jiawei Yan, Dongyue Xie, Yao Shen, Jian Wang, and Guo-zhen Zhu. "Self-patterning screw dislocations in pure Mg." Scripta Materialia 191 (January 2021): 86–89. http://dx.doi.org/10.1016/j.scriptamat.2020.09.014.

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10

Fan, T. W., Q. Zhang, B. Y. Tang, L. M. Peng, and W. J. Ding. "Interaction between stacking faults in pure Mg." European Physical Journal B 82, no. 2 (July 2011): 143–46. http://dx.doi.org/10.1140/epjb/e2011-20141-y.

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11

Zhao, Chen, Fuyong Cao, and Guang-Ling Song. "Corrosivity of haze constituents to pure Mg." Journal of Magnesium and Alloys 8, no. 1 (March 2020): 150–62. http://dx.doi.org/10.1016/j.jma.2019.09.005.

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12

Ono, Nagato, Masaaki Ueda, and Sei Miura. "Mechanisms of Plastic Deformation in Pure Mg and AZ31 Mg Alloy Polycrystals." Materials Science Forum 488-489 (July 2005): 555–58. http://dx.doi.org/10.4028/www.scientific.net/msf.488-489.555.

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13

YASUI, Kengo, Motohiko KOUSHIMA, Nagato ONO, and Sei MIURA. "Hall-Petch Relation and Deformation Mechanism of Pure Mg and Mg Alloy." Proceedings of Conference of Kyushu Branch 2003 (2003): 51–52. http://dx.doi.org/10.1299/jsmekyushu.2003.51.

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14

Li, Zhuangzhuang, Zhixin Ba, Tao Wang, Juan Kuang, and Yongqiang Jia. "Fabrication and characterization of Mg–Mn hydrotalcite films on pure Mg substrates." Materials Research Express 6, no. 11 (October 18, 2019): 116440. http://dx.doi.org/10.1088/2053-1591/ab3528.

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15

Hu, X. S., Y. K. Zhang, M. Y. Zheng, and K. Wu. "A study of damping capacities in pure Mg and Mg–Ni alloys." Scripta Materialia 52, no. 11 (June 2005): 1141–45. http://dx.doi.org/10.1016/j.scriptamat.2005.01.048.

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16

Terlicka, Sylwia, Paweł Darłak, Natalia Sobczak, and Jerzy J. Sobczak. "Non-Wetting and Non-Reactive Behavior of Liquid Pure Magnesium on Pure Tungsten Substrates." Materials 15, no. 24 (December 17, 2022): 9024. http://dx.doi.org/10.3390/ma15249024.

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Анотація:

The wetting behavior of liquid magnesium drop on pure tungsten substrates was investigated, for the first time, with the sessile drop method combined with non-contact heating and capillary purification of a Mg drop from a native oxide film. A specially designed apparatus dedicated to the investigation of the high-temperature interaction of dissimilar materials was used. The comparative experiments were performed under isothermal conditions at temperatures of 700 °C and 740 °C using two atmospheres: Ar + 5 wt.% H2 and pure Ar, respectively. During high-temperature tests for 180 s, the images of the Mg/W couples were recorded with CCD cameras (57 fps) from two directions of observation. The solidified drop/substrate couples were subjected to structural characterization using scanning electron microscopy (SEM) coupled with energy-dispersive X-ray spectroscopy (EDS). Under the applied measurement conditions, liquid Mg revealed non-wetting behavior on W substrates (a contact angle θ > 90°). The average value of the contact angle under the flowing Ar atmosphere at 740 °C was θav = 115°, whereas it was higher under the flowing Ar + 5 wt.%. H2 atmosphere at a lower temperature of 700 °C, showing θav = 122°. Independently on employed atmosphere and temperature, SEM + EDS analysis of solidified sessile drop couples did not display any new phases and mass transfer between the Mg drop and the W substrate, whereas the presence of discontinuities at the Mg/W interface of cross-sectioned couples were well-distinguished. Non-wetting and a lack of permanent bonding between the Mg drop and W substrates have a good agreement with the Mg–W phase diagram calculated with the help of FactSage software and FTlite database, i.e., the non-reactive nature of the Mg/W couple because W does not dissolve in liquid Mg and it does not form any compounds with Mg. These findings allow for the recommendation of tungsten as a suitable refractory material for long-time contact with liquid Mg in different container-assisted methods of materials characterization as well as in liquid-assisted processing of Mg components.

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17

Sandlöbes, Stefanie, Igor Schestakow, Sang Bong Yi, Stefan Zaefferer, Jing Qui Chen, Martin Friák, Jörg Neugebauer, and Dierk Raabe. "The Relation between Shear Banding, Microstructure and Mechanical Properties in Mg and Mg-Y Alloys." Materials Science Forum 690 (June 2011): 202–5. http://dx.doi.org/10.4028/www.scientific.net/msf.690.202.

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The formation of deformation-induced shear bands plays an important role for the room temperature deformation of both, Mg and Mg-Y alloys, but the formation and structure of shear bands is distinctively different in the two materials. Due to limited deformation modes in pure Mg, the strain is localized in few shear bands leading to an early failure of the material during cold deformation. Contrarily, Mg-RE (RE: rare earth) alloys exhibit a high density of homogeneously distributed local shear bands during deformation at room temperature. A study of the microstructure of the shear bands by electron backscatter diffraction (EBSD) and transmission electron microscopy (TEM) at different strains was performed. These investigations give insight into the formation of shear bands and their effects on the mechanical behaviour of pure Mg and Mg-3Y. Since in pure Mg mainly extension twinning and basal <a> dislocation slip are active, high stress fields at grain resp. twin boundaries in shear bands effect fast growth of the shear bands. In Mg-RE alloys additionally contraction and secondary twinning and pyramidal <c+a> dislocation slip are active leading to the formation of microscopic shear bands which are limited to the boundary between two grains. The effects of shear bands on the mechanical behaviour of pure Mg and Mg-RE alloys are discussed with respect to their formation and growth.

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18

Zhang, X. N., and R. J. Wu. "Damping Capacity of Pure Mg Metal Matrix Composites." Key Engineering Materials 249 (September 2003): 217–22. http://dx.doi.org/10.4028/www.scientific.net/kem.249.217.

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19

KITAHARA, Hiromoto, Yuta HIROKAWA, Masayuki TSUSHIDA, and Shinji ANDO. "Bending Deformation Behavior of Pure Mg Single Crystals." Proceedings of the Materials and Mechanics Conference 2016 (2016): OS01–17. http://dx.doi.org/10.1299/jsmemm.2016.os01-17.

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20

Kusumoto, Masaaki, and Hideyuki Saitoh. "Effect of Ni Coating on Hydrogenation Kinetics in Pure Mg and Mg-Mg₂Ni Eutectic Alloy." Advanced Materials Research 26-28 (October 2007): 865–68. http://dx.doi.org/10.4028/www.scientific.net/amr.26-28.865.

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Анотація:

We have applied hybridization method to the surface modification by Ni coating on powder specimens of pure Mg and Mg-Mg2Ni eutectic alloy, and investigated the effect of the Ni coating on the hydrogenation kinetics in them. The hydrogenation kinetics at 350 degree C is greatly increased by the Ni coating for both the pure Mg and Mg-Mg2Ni eutectic alloy specimens. Thus, it is confirmed that the surface modification by the hybridization method is considerably effective to improve the hydrogenation kinetics in them. This improvement is thought to be a catalytic effect of the coated Ni. The hydrogenation kinetics of the Mg-Mg2Ni alloy specimen heat-treated at 470 degree C has increased compared with that of the as-cast alloy specimen. It is also confirmed that hydrogenation kinetics improves by the heat treatment to grow the eutectic structure consisted of Mg2Ni phase and Mg phase.

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21

YONGJUN, ZHANG, PEI XIAOMENG, and JIA SHUGONG. "CATHODIC DEPOSITION OF Mg(OH)2 COATINGS ON PURE Mg IN THREE Mg SALTS AQUEOUS SOLUTIONS." Surface Review and Letters 24, Supp02 (November 2017): 1850027. http://dx.doi.org/10.1142/s0218625x18500270.

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Film-forming effects of cathodic deposition on pure Mg substrate at constant DC in aqueous solutions of magnesium nitrate (Mg(NO3)[Formula: see text]6H2O), magnesium chloride (MgCl[Formula: see text]6H2O) and magnesium sulfate (MgSO[Formula: see text]7H2O) respectively were investigated systematically. Typical processes were studied by potentiodynamic cathodic polarization and galvanostatic polarization and typical samples were analyzed by SEM and XRD. The results indicate that the depositing efficiency is not only the highest but stablest, and deposited coatings show the best uniformity with Mg(NO3)[Formula: see text]6H2O solution employed as depositing medium and applied current density [Formula: see text][Formula: see text]mA cm[Formula: see text]. Cathodic deposition leads to regular mass loss of Mg substrate. The cathodic polarization curve of pure Mg in magnesium nitrate solution shows more obvious pseudo-passivation, several Tafel regions with different slopes appearing before diffusion-limited current density region, and oxygen consumption is the major cathodic reduction reaction under specified current density. However, hydrogen evolution reaction is dominant in both Mg chloride and Mg sulfate solutions. The deposition coatings are all composed of continuous and uniform mesh-like “basic layer” adjacent to substrate and discrete distributed snowball-like particles on the microscopic scale. The phase compositions are all crystal Mg(OH)2, and the coatings deposited in Mg chloride solution have (011) preferred orientation.

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22

Yu, Wenbin, Hong He, Chunmei Li, Qing Li, Zhiyi Liu, and Bing Qin. "Existing form and effect of zirconium in pure Mg, Mg-Yb, and Mg-Zn-Yb alloys." Rare Metals 28, no. 3 (May 24, 2009): 289–96. http://dx.doi.org/10.1007/s12598-009-0057-8.

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23

PHETSINORATH, Stéphane, Jian-xin ZOU, Xiao-qin ZENG, Hai-quan SUN, and Wen-jiang DING. "Preparation and hydrogen storage properties of ultrafine pure Mg and Mg–Ti particles." Transactions of Nonferrous Metals Society of China 22, no. 8 (August 2012): 1849–54. http://dx.doi.org/10.1016/s1003-6326(11)61396-4.

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24

Guo, Wei, Qudong Wang, Xiaochun Li, Hao Zhou, Li Zhang, and Wenjun Liao. "Wear Properties of Hot-Extruded Pure Mg and Mg-1 wt.% SiC Nanocomposite." Journal of Materials Engineering and Performance 24, no. 7 (May 12, 2015): 2774–78. http://dx.doi.org/10.1007/s11665-015-1548-4.

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25

Myrissa, Anastasia, Nezha Ahmad Agha, Yiyi Lu, Elisabeth Martinelli, Johannes Eichler, Gábor Szakács, Claudia Kleinhans, Regine Willumeit-Römer, Ute Schäfer, and Annelie-Martina Weinberg. "In vitro and in vivo comparison of binary Mg alloys and pure Mg." Materials Science and Engineering: C 61 (April 2016): 865–74. http://dx.doi.org/10.1016/j.msec.2015.12.064.

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26

Bao, Zhian, Kang-Jun Huang, Juan Xu, Li Deng, Shufeng Yang, Pan Zhang, and Honglin Yuan. "Preparation and characterization of a new reference standard GSB-Mg for Mg isotopic analysis." Journal of Analytical Atomic Spectrometry 35, no. 6 (2020): 1080–86. http://dx.doi.org/10.1039/d0ja00059k.

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27

Paramsothy, Muralidharan, Syed Fida Hassan, Narasimalu Srikanth, and Manoj Gupta. "Micro-Engineering the Stressed Macro-Interface and Enhancing the Performance of Mg/Al Bimetal Macrocomposites." Materials Science Forum 618-619 (April 2009): 221–25. http://dx.doi.org/10.4028/www.scientific.net/msf.618-619.221.

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New bimetal magnesium/aluminium macrocomposites containing millimeter-scale Al based core reinforcement were fabricated using solidification processing followed by hot coextrusion. The initial macrocomposite consisted of a combination of pure Mg shell and pure Al core. Some problems encountered with the macrocomposite were Mg and Al grain coarsening, an inadequate Mg-Al interface (macrointerface) and consequent reduction in strength, compared to monolithic Mg. To rectify these problems, three approaches were taken in the following order primarily to widen (strengthen) the Mg-Al interface: (a) pouring of pure Al at 900°C (higher temperature approach), (b) pure Mg shell substitution with AZ31 shell (single substitution approach) and (c) pure Mg shell and pure Al core substitution with AZ31 shell and AA5052 core, respectively (double substitution approach). The evolution (strengthening) of the Mg-Al interface and its effect on microstructure and mechanical properties in each macrocomposite is investigated in this paper.

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28

Chaudry, Umer Masood, Kotiba Hamad, and Tea-Sung Jun. "Investigating the Microstructure, Crystallographic Texture and Mechanical Behavior of Hot-Rolled Pure Mg and Mg-2Al-1Zn-1Ca Alloy." Crystals 12, no. 10 (September 21, 2022): 1330. http://dx.doi.org/10.3390/cryst12101330.

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In this study, the microstructure, crystallographic texture and the mechanical performance of hot-rolled pure Mg and Mg-2Al-1Zn-1Ca (herein inferred as AZX211) were thoroughly investigated. The results showed that the designed AZX211 alloy exhibited an exceptional strength/ductility synergy where an almost 40% increase in ductility was received for AZX211. The microstructural characterization revealed the grain refinement in the AZX211, where the grain size was reduced by more than 50% (24.5 µm, 10 µm for the pure Mg and the AZX211, respectively). Moreover, a discernible number of precipitates were dispersed in the AZX211, which were confirmed to be (Mg, Al)2Ca. The pure Mg showed a conventional strong basal texture while a significantly weakened split basal texture was received for the AZX211. The fraction of basal-oriented grains was 21% for the pure Mg and 5% for the AZX211. The significant texture weakening for the AZX211 can be attributed to the precipitation and co-segregation that triggered the preferential evolution of the non-basal grains while impeding the growth of the basal grains. This was also confirmed by the crystal orientation and the pseudo-rocking curves. The higher ductility of the AZX211 was explained based on the texture softening and Schmid factor for the basal and non-basal slip systems.

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29

Li, Wenting, Xiao Liu, Yufeng Zheng, Wenhao Wang, Wei Qiao, Kelvin W. K. Yeung, Kenneth M. C. Cheung, Shaokang Guan, Olga B. Kulyasova, and R. Z. Valiev. "In vitro and in vivo studies on ultrafine-grained biodegradable pure Mg, Mg–Ca alloy and Mg–Sr alloy processed by high-pressure torsion." Biomaterials Science 8, no. 18 (2020): 5071–87. http://dx.doi.org/10.1039/d0bm00805b.

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High-pressure torsion processing is an effective way to significantly refine the microstructure and consequently modify the mechanical properties, biodegradable behaviors and biocompatibility of pure Mg, Mg–1Ca and Mg–2Sr alloys.

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30

Kondo, Ryota, Shunsuke Satake, Koji Tanaka, and Hiroyuki T. Takeshita. "Formation of Internal MgH₂ in Pure Mg and Mg-Al-Zn Alloys." Journal of the Japan Institute of Metals 80, no. 12 (2016): 753–58. http://dx.doi.org/10.2320/jinstmet.jd201603.

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31

FUNATSU, Keisuke, Junko UMEDA, Makoto TAKAHASHI, and Katsuyoshi KONDOH. "Surface Modification Phenomenon of X-ray Irradiated Pure Mg." Journal of Smart Processing 1, no. 6 (2012): 293–97. http://dx.doi.org/10.7791/jspmee.1.293.

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32

Abbasi, Somayyeh, Mahmoud Aliofkhazraei, Hedayat Mojiri, Mina Amini, Mohammad Ahmadzadeh, and Masoud Shourgeshty. "Corrosion behavior of pure Mg and AZ31 magnesium alloy." Protection of Metals and Physical Chemistry of Surfaces 53, no. 3 (May 2017): 573–78. http://dx.doi.org/10.1134/s2070205117030029.

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33

Wang, B., Y. S. Yang, J. Zhou, and W. Tong. "Structure refinement of pure Mg under pulsed magnetic field." Materials Science and Technology 27, no. 1 (January 2011): 176–79. http://dx.doi.org/10.1179/174328409x428936.

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34

Sayari, F., R. Mahmudi, and R. Roumina. "Inducing superplasticity in extruded pure Mg by Zr addition." Materials Science and Engineering: A 769 (January 2020): 138502. http://dx.doi.org/10.1016/j.msea.2019.138502.

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35

Li, M., X. L. Chen, D. F. Zhang, W. Y. Wang, and W. J. Wang. "Humidity sensitive properties of pure and Mg-doped CaCu3Ti4O12." Sensors and Actuators B: Chemical 147, no. 2 (June 3, 2010): 447–52. http://dx.doi.org/10.1016/j.snb.2010.03.063.

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36

Ma, Sa, Fangzhou Xing, Na Ta, and Lijun Zhang. "Kinetic modeling of high-temperature oxidation of pure Mg." Journal of Magnesium and Alloys 8, no. 3 (September 2020): 819–31. http://dx.doi.org/10.1016/j.jma.2019.12.005.

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37

Kim, Young-Min, In-Ho Jung, and Byeong-Joo Lee. "Atomistic modeling of pure Li and Mg–Li system." Modelling and Simulation in Materials Science and Engineering 20, no. 3 (February 1, 2012): 035005. http://dx.doi.org/10.1088/0965-0393/20/3/035005.

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38

LI, Chuan-qiang, Zhi-pei TONG, Yi-bin HE, Huai-pei HUANG, Yong DONG, and Peng ZHANG. "Comparison on corrosion resistance and surface film of pure Mg and Mg−14Li alloy." Transactions of Nonferrous Metals Society of China 30, no. 9 (September 2020): 2413–23. http://dx.doi.org/10.1016/s1003-6326(20)65388-2.

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39

Suzuki, Shigeaki. "Treatment of pure ocular myasthenia: a proposal from Japan MG registry 2012." Rinsho Shinkeigaku 53, no. 11 (2013): 1303–5. http://dx.doi.org/10.5692/clinicalneurol.53.1303.

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40

Ben Mbarek, Wael, Eloi Pineda, Lluïsa Escoda, Joan Suñol, and Mohamed Khitouni. "Dealloying of Cu-Mg-Ca Alloys." Metals 8, no. 11 (November 8, 2018): 919. http://dx.doi.org/10.3390/met8110919.

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Анотація:

The chemical dealloying of Cu-Mg-Ca alloys in free corrosion conditions was investigated for different alloy compositions and different leaching solutions. For some of the precursor alloys, a continuous, pure fcc copper with nanoporous structure can be obtained by dealloying in 0.04 M H2SO4 solution. Superficial nanoporous copper structures with extremely fine porous size were also obtained by dealloying in pure water and 0.1 M NaOH solutions. The dealloying of both amorphous and partially crystalline alloys was investigated obtaining bi-phase nanoporous/crystal composites with microstructures depending on the precursor alloy state. The fast dissolution of Mg and Ca makes the Cu-Mg-Ca system an ideal candidate for obtaining nanoporous copper structures with different properties as a function of different factors such as the alloy composition, the quenching process, and leaching conditions.

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41

Sankaran, A., S. Vadakke Madam, A. Nouri, and M. R. Barnett. "Attaining high compressive strains in pure Mg at room temperature by encasing with pure Al." Scripta Materialia 66, no. 10 (May 2012): 725–28. http://dx.doi.org/10.1016/j.scriptamat.2012.01.041.

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42

Xu, C., Ming Yi Zheng, Hai Chang, Xiao Shi Hu, Kun Wu, Wei Min Gan, and Heinz Günter Brokmeier. "Microstructure and Properties of Pure Mg/ZK60 Laminate Processed by Accumulative Roll Bonding." Materials Science Forum 650 (May 2010): 343–46. http://dx.doi.org/10.4028/www.scientific.net/msf.650.343.

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Commercial pure magnesium with excellent damping capacity and ZK60 magnesium alloy with high strength were accumulative roll bonded (ARBed) at 300oC up to 3 cycles to fabricate Mg laminate consisting of alternating layers of pure Mg and ZK60. Microstructure, tensile properties and damping capacity of the sheets were analyzed. The research suggests that Mg sheet having both high strength and excellent damping capacity can be developed by accumulative roll bonding of pure Mg and ZK60 Mg alloy.

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43

Chang, Si Young, Ye Lim Kim, Byung Heum Song, and Jae Ho Lee. "Effect of Current Ratio on Plasma Electrolytic Oxide Coatings on Mg-Al Alloy." Solid State Phenomena 124-126 (June 2007): 767–70. http://dx.doi.org/10.4028/www.scientific.net/ssp.124-126.767.

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Ceramic coatings were synthesized on pure Mg and binary Mg-7.1wt%Al alloy by plasma electrolytic oxidation (PEO) technique, and the effect of current ratio, C2/C1, ranging from 0.2 to 0.85 on their mechanical and electrochemical properties was investigated. As the C2/C1 ratio increased, the thickness of the coating layer increased, while surface roughness was almost unchanged. The hardness and wear resistance had a marked tendency to increase with increasing C2/C1 ratio and Mg-Al alloy showed higher hardness and wear resistance at all C2/C1 ratios compared to pure Mg. The weight loss of the pure Mg and Mg-Al alloy in 3.5%NaCl solution was reduced by coatings. However, it had no dependence on the C2/C1 ratio. The wear resistance of the coated Mg-Al alloy was better than that of the coated pure Mg.

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Yao, Jia, Min Zha, Huiyuan Wang, and Wei Lu. "Influence Research of Al and Zn Addition for Twin Roll Casting Magnesium During Multi-Pass Hot Rolling." Science of Advanced Materials 12, no. 5 (May 1, 2020): 685–92. http://dx.doi.org/10.1166/sam.2020.3703.

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This study was aimed at revealing the influence of Al and Zn additions on microstructure, texture evolution and mechanical properties of twin roll casting Mg during multi-pass hot rolling. Firstly, both pure Mg and AZ31 sheets were rolled 9 passes with ∼80% thickness reduction. More effective grain refinement in AZ31 compared to pure Mg after hot rolling, which caused by the pinning effect from fine Mg17Al12 particles present in AZ31 alloy. Meanwhile a strong basal texture gradually formed with increasing thickness reduction in pure Mg. With Al and Zn adding, the texture intensity of AZ31 was much lower than pure Mg in each rolling-pass. The 5th AZ31 sample features a maximum intensity of ∼12.9, which is reduced by 50.6% as compared to the value of ∼26.1 for pure Mg. Compared to pure Mg, the Al and Zn solutes and weakened texture in AZ31 favor the strong work hardening, which promotes a simultaneous high ultimate tensile strength of ∼270 MPa and ductility of ∼22% in the 5th AZ31 sample. The results will be helpful for the TRCed Mg alloys with huge potential for industrial application.

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Kitajima, Takuma, Keisuke Fukushi, Masahiro Yoda, Yasuo Takeichi, and Yoshio Takahashi. "Simple, Reproducible Synthesis of Pure Monohydrocalcite with Low Mg Content." Minerals 10, no. 4 (April 13, 2020): 346. http://dx.doi.org/10.3390/min10040346.

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Monohydrocalcite (MHC) is a metastable hydrous calcium carbonate that requires Mg in the mother solution during formation in the laboratory. MHC prepared by previously reported methods always contains a large amount of Mg (Mg/Ca ratio up to 0.4) because of the simultaneous formation of amorphous Mg carbonate during synthesis, which has hindered detailed elucidation of the mineralogical characteristics of MHC. Here, we synthesized MHC at low temperature (5 °C) and found that it contained little Mg (Mg/Ca ratio < 0.01). X-ray absorption near-edge structure analysis of synthesized MHC revealed that the Mg present was structurally incorporated within the MHC, and that the chemical speciation of this Mg was similar to that of Mg in aragonite. Thus, low-temperature synthesis is an effective means of producing MHC without also producing amorphous Mg carbonate.

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Minda, Jozef, Stanislava Fintová, Branislav Hadzima, Pavel Doležal, Michaela Hasoňová, Leoš Doskočil, and Jaromír Wasserbauer. "Electrochemical Corrosion Behavior of Pure Mg Processed by Powder Metallurgy." Coatings 11, no. 8 (August 19, 2021): 986. http://dx.doi.org/10.3390/coatings11080986.

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Pure Mg samples were prepared by powder metallurgy using the cold and hot compacting methods. Cold compacted pure Mg (500 MPa/RT) was characterized by 5% porosity and the mechanical bonding of powder particles. Hot compacted samples (100 MPa/400 °C and 500 MPa/400 °C) exhibited porosity below 0.5%, and diffusion bonding combined with mechanical bonding played a role in material compaction. The prepared pure Mg samples and wrought pure Mg were subjected to corrosion tests using electrochemical impedance spectroscopy. Similar material corrosion behavior was observed for the samples compacted at 500 MPa/RT and 100 MPa/400 °C; however, hot compacted samples processed at 500 MPa/400 °C exhibited longer corrosion resistance in 0.9% NaCl solution. The difference in corrosion behavior was mainly related to the different binding mechanisms of the powder particles. Cold compacted samples were characterized by a more pronounced corrosion attack and the creation of a porous layer of corrosion products. Hot compacted samples prepared at 500 MPa/400 °C were characterized by uniform corrosion and the absence of a layer of corrosion products on the specimen surface. Powder-based cold compacted samples exhibited lower corrosion resistance compared to the wrought pure Mg, while the corrosion behavior of the hot compacted samples prepared at 500 MPa/400 °C was similar to that of wrought material.

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47

Kékedy-Nagy, László, Mojtaba Abolhassani, Lauren F. Greenlee, and Bruno G. Pollet. "An Electrochemical Study of Ammonium Dihydrogen Phosphate on Mg and Mg Alloy Electrodes." Electrocatalysis 12, no. 3 (February 22, 2021): 251–63. http://dx.doi.org/10.1007/s12678-021-00646-x.

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AbstractIn this work, the electrochemistry of ammonium dihydrogen phosphate in aqueous solution on Mg and Mg AZ31 alloy (Al 3 wt%, Zn 1 wt%, balanced Mg) electrodes was studied using electrochemical characterization similar to electro-agglomeration and physical characterization to shed some light on the electrochemical mechanism of struvite formation as phosphate precipitation in waste. It was found that the Mg AZ31 alloy exhibited higher corrosion current densities (jcorr), and thus higher Mg dissolution rates and corrosion rates (vcorr) when compared with pure Mg. This finding was confirmed by ion chromatography (IC) analysis. Results also showed a phosphorus removal efficiency (PRem) of 16.8% together with ~53 mL H2 production for pure Mg and 17.2% with ~61 mL H2 production for Mg AZ31 alloy. The precipitates formed on the two Mg electrode materials were physically characterized by SEM, XRD, XPS, and energy-dispersive X-ray spectroscopy, which indicated the formation of struvite (magnesium ammonium phosphate hexahydrate-MgNH4PO4*6H2O). It was found that (i) the thickness of the films was influenced by the applied scan rates, which also had a significant impact on the morphology, and (ii) hydrogen bubble formation influenced the precipitates, whereby the film thicknesses were negatively impacted. Graphical abstract

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48

Zhang, Chi, Xin Li, Keli Liu, Guangyuan Tian, Shuo Wang, and Junsheng Wang. "In Situ Characterization of Corrosion Processes of As-Extruded Pure Magnesium Using X-Ray Computed Microtomography." Corrosion 78, no. 4 (February 23, 2022): 350–58. http://dx.doi.org/10.5006/3934.

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X-ray computed microtomography was used to investigate the corrosion process of the extruded pure magnesium (Mg). The microscopic corrosion morphologies on the extruded pure Mg surface with corrosion time were observed by three-dimensional reconstruction technology. The effects of grain size and grain orientation of the extruded pure Mg on the corrosion rate were studied by the electron backscattered diffraction and first-principles calculations. It is found that the corrosion on the extruded pure Mg surface prefers to form on the grain boundary and the corrosion morphology is mainly the corrosion cracks distributed in a dendritic bifurcation state along the extrusion direction. Interestingly, these dendritic corrosion cracks are connected with the corrosion pits within the surface. The corrosion resistance of extruded pure Mg is improved slightly due to the presence of many high-energy sites at the grain boundaries that promote corrosion.

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Bakhsheshi-Rad, Hamid Reza, Esah Hamzah, M. H. Idris, S. Farahany, and A. Fereidouni‎. "Phase Evaluation of Pure Mg, Mg-1Ca and Mg-1Ca-3Zn ‎Alloys by Thermal Analysis Used in ‎Medical Applications." Applied Mechanics and Materials 606 (August 2014): 93–97. http://dx.doi.org/10.4028/www.scientific.net/amm.606.93.

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In this research paper phase identification was conducted based on the thermal and microstructural analysis of pure Mg, binary ‎Mg-Ca and ternary Mg-Ca-Zn alloys which have been received significant attention to be used as biodegradable implants. ‎Thermal analysis results show that nucleation temperature of primary Mg decreased and solidification range expanded with ‎adding Ca and Zn to the Mg melt. Moreover, characteristics temperatures of intermetallic phase assess for Mg-1Ca and Mg-‎‎1Ca-3Zn alloys. Microstructural evolutions of specimens were characterized by optical microscopy, scanning electron ‎microscopy (SEM) and energy dispersive x-ray spectroscopy (EDS). The result revealed that the identification of Mg2Ca and Ca2Mg6Zn3‎intermetallic phases by thermal analysis which were also detected by EDS. Furthermore with addition of Ca and Zn elements, the ‎coherency time increased while, the fraction of primary α-Mg at dendrite coherency point (fαDCP) decreased.‎

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Marco, I., A. Myrissa, E. Martinelli, F. Feyerabend, R. Willumeit-Römer, AM Weinberg, and O. Van der Biest. "In vivo and in vitro degradation comparison of pure Mg, Mg-10Gd and Mg-2Ag: a short term study." European Cells and Materials 33 (February 13, 2017): 90–104. http://dx.doi.org/10.22203/ecm.v033a07.

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