Phase transitions in some nickel-rich nickel–boron–titanium hard alloys

Ajao, J. A.

doi:10.1016/j.jallcom.2009.12.091

Cited by 12 publications

(10 citation statements)

References 25 publications

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“…4c. Similar observations have been reported during slow cooling of Ni-B alloys doped with titanium [13]. In fact, at 968 0 C, the non-stoichiometric Ni 3 B was saturated with the atoms of nickel and vanadium at the same time.…”

Section: Differential Thermal Analysis (Dta) Samplessupporting

confidence: 86%

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Preparation and Structural Characterization of Vanadium Doped Ni – B Binary Hard Alloys

Ajao¹

2010

JMMCE

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Section: Differential Thermal Analysis (Dta) Samplessupporting

confidence: 86%

“…The lattice parameter of this ternary phase varies between 10.47Å and 10.49Å [10]. Similar ternary phase has been reported in Ni-B-Si [11] and Ni-B-Ti [12,13] systems.…”

Section: Samples Cooled At Rapid Ratesupporting

confidence: 71%

Preparation and Structural Characterization of Vanadium Doped Ni – B Binary Hard Alloys

Ajao¹

2010

JMMCE

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“…localization takes place. Along with Ni x B y B [2], Ni x BB y Ti z ternary compounds [32][33][34] can form (see Figs. 5 a, b).…”

Section: Characterization Of Ceramicsmentioning

confidence: 99%

Formation and properties of TiB2-Ni composite ceramics

Власова¹,

Быков²,

Kakazey³

et al. 2016

Sci Sintering

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An analysis of physical and chemical processes occurring during hot pressing of the 95 wt. % TiB 2-5 wt. % NiCl 2 By powder mixture in the temperature range 1800-2000 °C has been performed by X-ray diffraction, scanning electron microscopy, an electron-probe microanalysis. It has been established that, in the process of heat treatment, sintering, TiB 2 grain growth, diffusion of boron and titanium into nickel layers, and the formation of Ni x B y Ti z layers between TiB 2 grains occur. These layers act as a grains binder TiB 2. It is shown that the drilling of the obtained high-strength ceramics can be performed by laser machining.

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“…In the study of phase transitions in some nickel-rich nickel-boron-titanium hard alloys, Ajao [9] reported the microstructure of Ni-B-Ti alloys and the crystallographic orientation relationships between nickel and the boride phases. Solid-state transformation of the ternary phase was observed in his study.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Strengthening and Microstructural Evolutions of Ni-B Based Hardfacing Alloys Influenced by Titanium Additions

Ebimobowei¹,

Ajenifuja²,

Adegbindin³

2019

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The microstructure and mechanical behaviour of NiB binary alloys have been enhanced in this study by varied titanium additions. The alloys investigated were chosen from the nickel-rich region of the NiB -Ti system. The microstructure of the alloys was examined using Optical Microscope (OM) and Scanning Electron Microscope (SEM) equipped with Energy Dispersive X-ray Analyzer (EDXA). The addition of titanium led to the formation of various complex phases and a ternary phase τ was observed in the study. The addition of titanium to the NiB alloys was found to enhance the mechanical properties of the ternary alloys. Microhardness value of the alloys was observed to increase from 216.2 HV with zero Ti in NiB alloys to 1530.7 HV in alloys with 11 wt. % Ti. The stiffness of the alloys was also found to increase as deduced from elastic modulus value of 513.77 to 1046.51 N/m 2 in Alloys C. Remarkable improvement in physical properties of the Ni-based ternary alloys is due to the formation of various hard boride phases and grain size reduction occasioned by the increase in titanium content.

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Phase transitions in some nickel-rich nickel–boron–titanium hard alloys

Cited by 12 publications

References 25 publications

Preparation and Structural Characterization of Vanadium Doped Ni – B Binary Hard Alloys

Preparation and Structural Characterization of Vanadium Doped Ni – B Binary Hard Alloys

Formation and properties of TiB2-Ni composite ceramics

Mechanical Strengthening and Microstructural Evolutions of Ni-B Based Hardfacing Alloys Influenced by Titanium Additions

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