Microstructure evolution and mechanical properties of intermetallic Ni–xSi (x=5, 10, 15, 20) alloys

Karaköse, Ercan; Keskín, Mustafa

doi:10.1016/j.jallcom.2012.02.165

Cited by 18 publications

(7 citation statements)

References 24 publications

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“…The a-Ni phase contained a large amount of Si as the Ni-Si phase diagram shows that approximately 15.8 at.% Si can soluble in Ni at the eutectic temperature. Similar results were reported by Karaköse and Keskin [12] for conventionally solidified Ni-20 wt.% Si alloy and by Çadırlı et al [13] for rapidly solidified Ni-21.4 at.% Si eutectic alloy. It should be additionally note that there is an unidentified peak at 46.62°.…”

Section: Resultssupporting

confidence: 90%

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Microstructural and mechanical properties of binary Ni–Si eutectic alloys

Göğebakan

Kursun

Gündüz

et al. 2015

Journal of Alloys and Compounds

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Section: Resultssupporting

confidence: 90%

“…Therefore, the experimental results show that the microstructural evolution depends on the chemical composition for all alloy systems. Similar microstructural evolution has been observed for Ni-xSi (x = 5, 10, 15 and 20) alloys by Karakose and Keskin [12] and for Ni-xSi (x = 10, 21.4, 25 and 35) alloys by Çadırlı et al [15]. Fig.…”

Section: Resultssupporting

confidence: 83%

Microstructural and mechanical properties of binary Ni–Si eutectic alloys

Göğebakan

Kursun

Gündüz

et al. 2015

Journal of Alloys and Compounds

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“…Experimental errors were taken in to accounts for all the testing procedures mentioned above. These results are very similar to those reported by Karakose and Keskin (9) and Cadırlı et al (10) for conventionally solidified Al-Ni-10 wt. % Ni alloy and by rapidly solidified Al-Ni-12 at % Ni respectively.…”

Section: Methodssupporting

confidence: 92%

“…Improving applications and properties of alloys generated by Al in particular different areas are the researches subject to grow interest in the field of materials science (1), (2), (3) . Since aluminium-based alloys Al-Ni in particular have exceptional properties against harsh conditions such as corrosion and high resistance to oxidation, resistance gives interested to investigate its properties particularly mechanical, microstructure, electrical and thermal properties (4), (5), (6) . However, the material properties in general are strongly dependent on their microstructure phases.…”

Section: Introducctionmentioning

confidence: 99%

Annealing Effect on Structural, Thermal and Mechanical Properties of the Binary Al 85 Ni15 Alloy Composition

Saleh¹,

Göğebakan²,

Omar

et al. 2019

innovaciencia

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Introduction: The Al 85-Ni15 alloy with 99.99% purity of Al and Ni were prepared by an arc melting technique system. The annealing effect onthe microstructure properties, phase transformation and micro-hardness for the Al-Ni alloy system were investigated. Material and Methods:The alloys were characterized by X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), and Differential Thermal Analysis (DTA) as well as Vickers micro-hardness measurement. Results and Discussion: The quantitative results confirm that the chemical composition of the alloys is very close to compositions and the microstructures are in typical lamellar morphology. Mechanical properties for the as-prepared samples and subsequently heat-treated samples were measured by a Vickers indenter. Values of the micro-hardness (HV) Conclusions: According the XRD pattern analysis a multi phases produced, such as Al, AlNi3in room temperature, Al3Ni2, Al0.42Ni0.58 at 200ºC, Al1.1Ni0.9 at 300ºC and Al 0.802Ni0.198, AlNi3 and AlNi at 400ºC, and Al0.802Ni0.198, AlNi3 and AlNi for 500ºC. Similar approached were obtained from the results of SEM and DTA measurements. Annealing treatments are visibly affecting the alloy phase formation with different phases at different temperature. and the elastic modulus (E) of the as prepared sample are 132.9±0.1 kgfmm-2 (1.329±0.1 GPa) and 80.340±0.1 GPa, respectively. Furthermore, the characteristic of the materials plasticity (δH) value was calculated to be 0.85. The micro-hardness values are decrease with the increase of annealing temperatures.

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“…Moreover, it is also difficult to distinguish the -Ni and 1 -Ni 3 Si phases, because both phases have the same cubic structure, with the lattice constant 'a' being 3.5244 Å and 3.5050 Å, respectively. A number of previous studies on Ni-Si alloys [8,33] have shown overlapping -Ni and 1 -Ni 3 Si XRD peaks. Here, the 1 -Ni 3 Si phases can only be confirmed according to the presence of the unique, but weak, characteristic peaks corresponding to the (100) and (110) planes at 3.5050 Å and 2.4784 Å.…”

Section: Edx Xrd and Dta Analysesmentioning

confidence: 89%

Microstructural Evolution and Phase Formation in Rapidly Solidified Ni-25.3 At. Pct Si Alloy

Cao

Mullis

2015

Metall Mater Trans A

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The drop-tube technique was used to solidify droplets of the Ni-25.3 at.% Si alloy at high cooling rates. XRD, SEM and TEM analysis revealed that the metastable phase, Ni 25 Si 9 , formed as the dominant phase in all ranges of the droplets, with -Ni 31 Si 12 and 1 -Ni 3 Si also being present. Three different microstructures were observed: the regular and anomalous eutectic structures and near single phase structure containing small inclusions of a second phase, termed here a heteroclite structure. Both eutectic structures comprise alternating lamellae of Ni 25 Si 9 and 1 -Ni 3 Si, which, we conjecture, is a consequence of an unobserved eutectic reaction between the Ni 25 Si 9 and 1 -Ni 3 Si phases. The matrix of the heteroclite structure is also identified as the metastable phase Ni 25 Si 9 , in which twined growth is observed in the TEM. As the cooling rate is increased (particle size decreased) the proportion of droplets displaying the entire heteroclite structure tends to increase, with its fraction increasing from 13.91% (300-500 µm) to 40.10% (75-106 µm). The thermodynamic properties of the Ni 25 Si 9 phase were also studied by in-situ heating during XRD analysis and by DTA. This showed the decomposition of Ni 25 Si 9 to 1 and -Ni 31 Si 12 for temperatures in excess of 790 K (517°C).

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Microstructure evolution and mechanical properties of intermetallic Ni–xSi (x=5, 10, 15, 20) alloys

Cited by 18 publications

References 24 publications

Microstructural and mechanical properties of binary Ni–Si eutectic alloys

Microstructural and mechanical properties of binary Ni–Si eutectic alloys

Annealing Effect on Structural, Thermal and Mechanical Properties of the Binary Al 85 Ni15 Alloy Composition

Microstructural Evolution and Phase Formation in Rapidly Solidified Ni-25.3 At. Pct Si Alloy

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