Experimental reinvestigation of Al–Co phase diagram in vicinity of Al13Co4 family of phases

Priputen, P.; Kusý, Martin; Drienovský, Marián; Janičkovič, D.; Čička, Roman; Černičková, Ivona; Janovec, Jozef

doi:10.1016/j.jallcom.2015.05.248

Cited by 43 publications

(12 citation statements)

References 36 publications

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“…1) 27 . So far, six phases from the Al 13 Co 4 family were reported with slightly different structures 35 . The crystal used in this study (o-Al 13 Co 4 ) is orthorhombic and crystallizes in the Pmn2 1 space group (No.…”

Section: Al 13 Tm 4 (Tm=co Fe) Bulk and Surface Structuresmentioning

confidence: 99%

Catalytic activation of a non-noble intermetallic surface through nanostructuration under hydrogenation conditions revealed by atomistic thermodynamics

et al. 2020

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Section: Al 13 Tm 4 (Tm=co Fe) Bulk and Surface Structuresmentioning

confidence: 99%

Catalytic activation of a non-noble intermetallic surface through nanostructuration under hydrogenation conditions revealed by atomistic thermodynamics

et al. 2020

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“…The intermetallic Al 13 Co 4 -type compounds are famous model systems for decagonal quasicrystalline phases. They have been studied extensively in the past few years, both to specify the structure of the various representatives of this family (o-Al 13 Co 4 , m-Al 13 Co 4 , τ 2 -Al 13 Co 4 , and o -Al 13 Co 4 ) [1][2][3][4][5], whose stability is increased by a proper distribution of vacancies [4,6], but also for their interesting transport and mechanical behavior [7][8][9]. Most of the applications related to complex intermetallic phases rely on their surface properties.…”

Section: Introductionmentioning

confidence: 99%

Structure of theAl13Co4(100) surface: Combination of surface x-ray diffraction andab initiocalculations

et al. 2016

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The structure of the quasicrystalline approximant Al 13 Co 4 (100) has been determined by surface x-ray diffraction (SXRD) and complementary density-functional-theory (DFT) calculations. Thanks to the use of a two-dimensional pixel detector, which speeds up the data acquisition enormously, an exceptionally large set of experimental data, consisting of 124 crystal truncation rods, has been collected and used to refine this complex structure of large unit cell and low symmetry. Various models were considered for the SXRD analysis. The best fit is consistent with a surface termination at the puckered type of planes but with a depletion of the protruding Co atoms. The surface energy of the determined surface model was calculated using DFT, and it takes a rather low value of 1.09 J/m 2. The results for the atomic relaxation of surface planes found by SXRD or DFT were in excellent agreement. This work opens up additional perspectives for the comprehension of related quasicrystalline surfaces.

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“…One dump was detected at the 2 = 45 ∘ ∼47 ∘ in each WC-Co/Al powder instead of the sharp diffraction peak, which showed that the binding phase became amorphous to some extent during the ball milling [21]. The reason for this phenomenon can be attributed to the fact that the grinding balls repeatedly squeezed the mixed powders making the [22]. Because the diffraction peaks of these IMC phases are very closed in the XRD patterns, we noted them as Al Co in this paper.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and Characterization of Nanostructured WC-Co/Al Powder Prepared by Mechanical Alloying

Zhang

Yin

et al. 2016

Journal of Nanomaterials

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Nanostructured WC-Co/Al powder was synthesized from WC-12Co powder and pure Al powder by mechanical alloying (MA). The morphology and microstructural evolution of WC-Co/Al powder were investigated by a series of characterization methods. The results showed that theβ-Co phase in the initial WC-12Co powder was replaced by the AlxCo phases (such as Al9Co2and Al13Co4). As the ball milling time increased, the average grain size of WC in the WC-Co/Al powder decreased firstly and then remained at a constant value of around 40 nm. The deposition behavior of powders sprayed by high velocity oxygen fuel (HVOF) spraying was investigated. During spraying, the WC-Co/Al powder had a better flattening than the WC-12Co powder without ball milling, which is beneficial to fabricate compact coatings with lower porosity.

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Experimental reinvestigation of Al–Co phase diagram in vicinity of Al13Co4 family of phases

Cited by 43 publications

References 36 publications

Catalytic activation of a non-noble intermetallic surface through nanostructuration under hydrogenation conditions revealed by atomistic thermodynamics

Catalytic activation of a non-noble intermetallic surface through nanostructuration under hydrogenation conditions revealed by atomistic thermodynamics

Structure of theAl13Co4(100) surface: Combination of surface x-ray diffraction andab initiocalculations

Synthesis and Characterization of Nanostructured WC-Co/Al Powder Prepared by Mechanical Alloying

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