Relevant bibliographies by topics / Tailored long period stacking ordered phases

Academic literature on the topic 'Tailored long period stacking ordered phases'

Author: Grafiati
Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "Tailored long period stacking ordered phases"

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Yao, Huai, Jiuba Wen, Yi Xiong, Ya Liu, Yan Lu, and Wei Cao. "Microstructures, Mechanical Properties, and Corrosion Behavior of As-Cast Mg–2.0Zn–0.5Zr–xGd (wt %) Biodegradable Alloys." Materials 11, no. 9 (August 30, 2018): 1564. http://dx.doi.org/10.3390/ma11091564.

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The Mg–Zn–Zr–Gd alloys belong to a group of biometallic alloys suitable for bone substitution. While biocompatibility arises from the harmlessness of the metals, the biocorrosion behavior and its origins remain elusive. Here, aiming for the tailored biodegradability, we prepared the Mg–2.0Zn–0.5Zr–xGd (wt %) alloys with different Gd percentages (x = 0, 1, 2, 3, 4, 5), and studied their microstructures and biocorrosion behavior. Results showed that adding a moderate amount of Gd into Mg–2.0Zn–0.5Zr alloys will refine and homogenize α-Mg grains, change the morphology and distribution of (Mg, Zn)3Gd, and lead to enhancement of mechanical properties and anticorrosive performance. At the optimized content of 3.0%, the fishbone-shaped network, ellipsoidal, and rod-like (Mg, Zn)3Gd phase turns up, along with the 14H-type long period stacking ordered (14H-LPSO) structures decorated with nanoscale rod-like (Mg, Zn)3Gd phases. The 14H-LPSO structure only exists when x ≥ 3.0, and its content increases with the Gd content. The Mg–2.0Zn–0.5Zr–3.0Gd alloy possesses a better ultimate tensile strength of 204 ± 3 MPa, yield strength of 155 ± 3 MPa, and elongation of 10.6 ± 0.6%. Corrosion tests verified that the Mg–2.0Zn–0.5Zr–3.0Gd alloy possesses the best corrosion resistance and uniform corrosion mode. The microstructure impacts on the corrosion resistance were also studied.
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Shao, Xiaohong, Huajie Yang, Jeff T. M. De Hosson, and Xiuliang Ma. "Microstructural Characterization of Long-Period Stacking Ordered Phases in Mg97Zn1Y2 (at.%) Alloy." Microscopy and Microanalysis 19, no. 6 (July 30, 2013): 1575–80. http://dx.doi.org/10.1017/s1431927613012750.

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AbstractTransmission electron microscopy characterization of two major long-period stacking ordered (LPSO) phases in Mg–Zn–Y alloy, i.e., 18R- and 14H-LPSO are reported. The space group and atomic-scale microstructures of both compounds were determined using a combination of electron diffraction, convergent beam electron diffraction, high-resolution transmission electron microscopy, and Z-contrast scanning transmission electron microscopy. The 18R-LPSO phase is demonstrated to have a point group and space group 3m and R3m (or 3m and R3m), with the lattice parameter a = 1.112 nm and c = 4.689 nm in a hexagonal coordinate system. The 14H-LPSO phase has a point group 6/mmm and a space group P63 /mmc, and the lattice parameter is a = 1.112 nm and c = 3.647 nm. In addition, insertion of extra thin Mg platelets of several atomic layers, results in stacking faults in the LPSO phase. These results may shed some new light on a better understanding of the microstructure and deformation mechanisms of LPSO phases in Mg alloys.
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Chisholm, M., S. J. Pennycook, Z. Yang, and G. Duscher. "Dislocations, stacking faults and interfaces in a Mg-Zn-Y alloy with long-period stacking ordered phases." Microscopy and Microanalysis 18, S2 (July 2012): 362–63. http://dx.doi.org/10.1017/s1431927612003662.

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Garcés, G., P. Pérez, S. González, and P. Adeva. "Development of long-period ordered structures during crystallisation of amorphous Mg80Cu10Y10 and Mg83Ni9Y8." International Journal of Materials Research 97, no. 4 (April 1, 2006): 404–8. http://dx.doi.org/10.1515/ijmr-2006-0067.

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Abstract The different transformations occurring during the crystallisation of amorphous Mg80Cu10Y10 and Mg83Ni9Y8 alloys have been elucidated. The formation of several unknown metastable phases was observed. The present work confirms that such phases exhibit long-period structures originated by the periodic alignment of (Y, TM)-layers (TM: transition metal). The long-period stacking-ordered phase, identified in the crystallised Ni-containing alloy, is stable at higher temperatures than that in the Cu-containing alloy.
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Kishida, Kyosuke, Hideyuki Yokobayashi, Atsushi Inoue, and Haruyuki Inui. "Crystal Structures of Long-Period Stacking-Ordered Phases in the Mg-TM-RE Ternary Systems." MRS Proceedings 1516 (2013): 291–302. http://dx.doi.org/10.1557/opl.2013.17.

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ABSTRACTCrystal structures of long-period stacking-ordered (LPSO) phases in the Mg-TM (transition-metal)-RE(rare-earth) systems were investigated by atomic resolution high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM). The 18R-type LPSO phase is constructed by stacking 6-layer structural blocks, each of which contains four consecutive close-packed planes enriched with TM and RE atoms. Formation of the TM6RE8 clusters with the L12 type atomic arrangement is commonly observed in both Mg-Al-Gd and Mg-Zn-Y LPSO phases. The difference between the crystal structures of Mg-Al-Gd and Mg-Zn-Y LPSO phases can be interpreted as the difference in the in-plane ordering of the TM6RE8 clusters in the structural block. The Mg-Al-Gd LPSO phase exhibits a long-range in-plane ordering of Gd and Al, which can be described by the periodic arrangement of the Al6Gd8 clusters with the L12 type atomic arrangement on lattice points of a two-dimensional 2$\sqrt 3 $aMg × 2$\sqrt 3 $aMg primitive hexagonal lattice, although the LPSO phase in the Zn/Y-poor Mg-Zn-Y alloys exhibits a shortrange in-plane ordering of the Zn6Y8 clusters.
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Wu, Xia, Fusheng Pan, and Renju Cheng. "Formation of long period stacking ordered phases in Mg-10Gd-1Zn-0.5Zr (wt.%) alloy." Materials Characterization 147 (January 2019): 50–56. http://dx.doi.org/10.1016/j.matchar.2018.10.022.

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Zhuang, Yuanlin, Li Ye, Yu Liu, Shengbo Gao, Dongshan Zhao, Shuangfeng Jia, He Zheng, Jianian Gui, and Jianbo Wang. "Incoherent long period stacking ordered phases and age-hardening in Mg-Gd-Ga alloys." Journal of Alloys and Compounds 832 (August 2020): 154841. http://dx.doi.org/10.1016/j.jallcom.2020.154841.

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Ma, Shang Yi, Li Min Liu, and Shao Qing Wang. "The Clustering of Zn6Y9 and its Predominant Role in Long Period Stacking Order Phases in Mg-Zn-Y Alloys: A First-Principles Study." Materials Science Forum 749 (March 2013): 569–76. http://dx.doi.org/10.4028/www.scientific.net/msf.749.569.

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The local structures of Zn and Y in the long period stacking order (LPSO) phase in Mg-Zn-Y system were investigated by first principles calculations in details. The clustering of Zn and Y atoms ranging from single stacking fault layer to four consecutive layers was explicitly demonstrated. The calculations indicate that Zn and Y atoms prefer clustering in the form of Zn6Y9 embedding in ABCA-type building block to the random or ordered arrangements of Zn and Y atoms being enriched in two stacking fault layers. The cluster of Zn6Y9 can be regarded as the ideal stoichiometric component of LPSO and it plays a predominant role in the LPSO phases. The formation of LPSO phases is highly associated with the Zn6Y9 cluster and its derivatives.
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Zong, Xi-Mei, Dan Wang, Wei Liu, Kai-Bo Nie, Chun-Xiang Xu, and Jin-Shan Zhang. "Effect of Precipitated Phases on Corrosion of Mg95.8Gd3Zn1Zr0.2 Alloy with Long-Period Stacking Ordered Structure." Acta Metallurgica Sinica (English Letters) 29, no. 1 (January 2016): 32–38. http://dx.doi.org/10.1007/s40195-015-0359-9.

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Kishida, Kyosuke, Kaito Nagai, Akihide Matsumoto, Akira Yasuhara, and Haruyuki Inui. "Crystal structures of highly-ordered long-period stacking-ordered phases with 18R, 14H and 10H-type stacking sequences in the Mg–Zn–Y system." Acta Materialia 99 (October 2015): 228–39. http://dx.doi.org/10.1016/j.actamat.2015.08.004.

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Conference papers on the topic "Tailored long period stacking ordered phases"

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Yarmolenko, Sergey, Kevin Galdamez, Sudheer Neralla, Zhigang Xu, Devdas Pai, and Jagannathan Sankar. "Study of the Formation of Long Period Stacking Ordered Phases in Sputtered Thin Film Mg-Gd-Zn Alloys." In ASME 2017 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/imece2017-71987.

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Formation of long-period stacking ordered (LPSO) phases can significantly improve mechanical and corrosion properties of Mg-alloys. Typically LPSO phases can be formed by quick solidification of Mg-alloys having at least two alloying elements with atomic radii higher and lower than that of Mg. Stability of LPSO phases greatly depend on amounts and ratio of alloying elements. We report formation of thin film LPSO structures produced by co-sputtering of magnesium with zinc and gadolinium having less than 10% of alloying elements. This method allows controlling the ratio of the elements in composition, deposition temperature and orientation of thin films. Pure Mg, Zn and Gd films and their alloys deposited at temperatures below 200°C have HCP Mg-based crystallographic structure with exclusively basal orientation. LPSO phases and their stacking period were detected by observation of laminar structure patterns in low-angle x-ray reflectometry scans. The study of effects of elemental composition, deposition temperature and post-annealing of room temperature-deposited films on the formation of LPSO phase showed that the co-sputtering method can be very useful and efficient for the screening of new LPSO phases without the considerable expense preparation of bulk alloy preparation.
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