The microstructure development in arc-melt and melt-spun Fe50Ni10Cu20P10Si5B5 immiscible alloy

Ziewiec, Krzysztof; Malczewski, Piotr; Gajerski, R.; Ziewiec, A.

doi:10.1016/j.jnoncrysol.2010.10.002

Cited by 22 publications

(10 citation statements)

References 17 publications

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“…Low content of Ni in the alloy does not assure formation of the uniform liquid that can be stable enough to form metallic glass below the glass transition temperature, because both liquids Fe-rich and Cu-rich are below their T 0 temperatures [26]. It is worth to note that there are Fe-based alloys where in spite of a substantial concentration of Cu the vitrification of the matrix was obtained [27][28][29][30][31][32][33][34].…”

Section: Resultsmentioning

confidence: 99%

AMORHIZATION AND LIQUID STATE SEPARATION IN Ni80-2xCuxFexP20 ALLOYS

Ziewiec

Prusik

Różycka

2014

mafe

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The aim of the work is to study the ability and potential of glass formation in Ni-Fe-Cu-P alloys. A series of alloys were produced in arc furnace (i.e. Ni 70 . The primary microstructure of the ingots was studied. The ribbons in as-melt-spun state were characterized by X-ray diffraction (XRD). The Ni 70 Fe 5 Cu 5 P 20 , Ni 60 Fe 10 Cu 10 P 20 melt-spun alloys were found to be amorphous. For higher copper and iron concentrations a crystalline structure was obtained after melt spinning. This correlated with the tendency for the formation of the Fe-based phases enriched in P and Cu-based poorly alloyed phases which resulted in the formation of crystalline microstructure in melt-spun ribbons. For higher concentration of Fe and Cu, microstructures of the alloys contained constituents resultant from a tendency for separation in the liquid state. It is observed that the formation of the crystalline melt-spun ribbons is caused by the attraction of phosphorus by iron and the formation of copper-based fcc phase. Key words: amorphous materials, amorphization, X-ray diffraction, transmission electron microscopy Streszczenie Celem pracy było zbadanie podatności na zeszklenie oraz możliwości wytworzenia struktury szklistej w stopach wieloskładnikowych Ni-Fe-Cu-P. P 20 odlewane na wirujący bęben były amorficzne. Dla stopów o wyższych zawartościach miedzi i żelaza po odlewaniu na wirujący walec otrzymano strukturę krystaliczną. Fakt ten można powiązać z tendencją do tworzenia faz na osnowie żelaza wzbogaconych w fosfor oraz zubożonych w pozostałe składniki stopowe faz na osnowie miedzi, które przyczyniły się do tworzenia w odlewanych taśmach mikrostruktury krystalicznej. Dla wyż-szych zawartości żelaza i miedzi, mikrostruktury stopów zawierały składniki fazowe powstające w efekcie tendencji stopów do podziału fazowego w stanie ciekłym. Zaobserwowano, że tworzenie krystalicznych taśm jest spowodowane przez przyciąganie fosforu przez żelazo oraz tworzenie bogatej w miedź fazy o strukturze regularnej ściennie centrowanej. Słowa kluczowe: materiały amorficzne, amorfizacja, dyfrakcja rentgenowska, transmisyjna mikroskopia elektronowa

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Section: Resultsmentioning

confidence: 99%

AMORHIZATION AND LIQUID STATE SEPARATION IN Ni80-2xCuxFexP20 ALLOYS

Ziewiec

Prusik

Różycka

2014

mafe

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“…By proper alloying, it is possible to increase the glass forming abilities of both melts, and a two-phase metallic glass can be formed upon cooling [10][11][12]. If a GFA of one melt will be not sufficient, amorphous-crystalline composites, containing sphericalshape crystalline precipitates embedded in an amorphous matrix, can be obtained [13][14][15][16]. However, a thermodynamic condition for liquid phase separation is in contrast with Inoue's empirical rule, which in turn significantly decreases the overall GFA of alloy.…”

Section: Introductionmentioning

confidence: 99%

Structures of Cu-Based Glass Forming System Doped with Iron

et al. 2016

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The effects of iron additions on the structure of (Cu0.47Ti0.34Zr0.11Ni0.08)100−xFex (x = 0, 1.5, 3, 6) glass forming system are presented. The alloys were synthesized by arc melting of high purity elements and melt spun to form rapidly quenched ribbons. X-ray diffraction studies showed the amorphous structure of the base and Fe-containing alloys, confirmed by the presence of exothermic peaks on differential scanning calorimetry curves. Bulk samples in the form of rods (Φ3 × 55 mm) were cast using a suction casting unit attached to the arc melter. Structural investigations revealed partial crystallization of the base Cu47Ti34Zr11Ni8 alloy. Iron additions significantly decreased the glass forming ability of the alloy, leading to primary crystallization of dendrites.

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“…In addition, the microstructural evolution is influenced by viscosity and diffusivity of the melt 8 . Size of the phase-separated structure also depends on time interval between an onset of the phase separation and completion of the solidification 9 . The boundaries of the liquid ternary miscibility gap can also be enlarged by applying high cooling rates 7 .…”

Section: Introductionmentioning

confidence: 99%

“…As a result of the second phase separation during further cooling, the small internal droplets appeared within the large droplets as so called a marble-type structure 15 . From their microstructural morphology, the primary and secondary phase separation mechanisms were identified as the nucleation and growth process 6,9 . SEM images of the melt-spun Ag 70 Cu 15 Zr 15 and Ag 80 Cu 10 Zr 10 ribbons were shown in Figure 4a and b, respectively.…”

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confidence: 99%

“…The current experimental observation showed that the melts of the Ag 100-2x Cu x Zr x alloys, where x = 10, 15 and 20, were rapidly cooled into the miscibility gap and then decomposed into two distinct types of structure. The purposed phase separation sequences were schematically drawn in Figure 5 and Figure 6 to describe the structural evolutions regarding works of Ziewiec et al 9 and Chang et al…”

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confidence: 99%

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Phase Separation in Rapid Solidified Ag-rich Ag-Cu-Zr Alloys

et al. 2015

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The microstructure and phase formation of rapid solidified Ag-rich Ag-Cu-Zr alloys were investigated. Two types of structure; interconnected-and droplet-type structures, were obtained due to phase separation mechanisms. The former was spinodal decomposition and the later was nucleation and growth mechanism. Depending on the alloy compositions, three crystalline phases; FCC-Ag, AgZr and Cu 10 Zr 7 phases were observed along with an in-situ nanocrystalline/amorphous composite. Vickers hardness testing indicated a significant increase of hardness in the nanocrystalline/amorphouscomposite alloy.

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The microstructure development in arc-melt and melt-spun Fe50Ni10Cu20P10Si5B5 immiscible alloy

Cited by 22 publications

References 17 publications

AMORHIZATION AND LIQUID STATE SEPARATION IN Ni80-2xCuxFexP20 ALLOYS

AMORHIZATION AND LIQUID STATE SEPARATION IN Ni80-2xCuxFexP20 ALLOYS

Structures of Cu-Based Glass Forming System Doped with Iron

Phase Separation in Rapid Solidified Ag-rich Ag-Cu-Zr Alloys

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