Synthesis of ODS heavy tungsten alloys through post-annealing and secondary ball milling

Chen, Chun-Liang; Huang, Chun-Lin; Zeng, Yong

doi:10.1016/j.ijrmhm.2014.10.008

Cited by 10 publications

(4 citation statements)

References 20 publications

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“…The results also show that the highest density was predictable at the metal binder phase of the composition Ni-Co-Fe. Previous studies show that the sintering of tungsten alloys can be enhanced by the existence of cobalt, as it prompts and increases the of rate of diffusion [8]. The existence of cobalt in the alloy allows solid-solution strengthening and eventually enhances interfacial strength between tungsten particles and the matrix [23].…”

Section: Electrical Conductivities Of Ods Tungsten Heavy Alloysmentioning

confidence: 99%

Effect of Transition Metals Oxides on the Physical and Mechanical Properties of Sintered Tungsten Heavy Alloys

et al. 2020

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The addition of transition element oxides to tungsten heavy alloys (WHAs) fabricated by powder metallurgy technique provides new materials with higher density and electrical conductivity, which may be adequate in some applications such as kinetic energy penetrators. Additionally, materials with higher electrical conductivity are required for electrical contact applications such as electrical discharge machining (EDM) electrode materials. WHAs were fabricated by compacting its mixed constituents followed by sintering. Ni, Co and Fe are used as binding phases of the tungsten particles and oxides of Zr, Ti and Y are used as oxide dispersing strengthening (ODS) agents of the sintered materials. The results show that all of the chosen factors (i.e., pressure of compaction process, temperature of sintering, type of binding material and type of oxide) have clear effects on all properties of ODS tungsten heavy alloy specimens. The density and electrical conductivity increase with the increase in sintering temperature. Hardness and compression strength were also measured to evaluate the mechanical properties of sintered samples.

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Section: Electrical Conductivities Of Ods Tungsten Heavy Alloysmentioning

confidence: 99%

Effect of Transition Metals Oxides on the Physical and Mechanical Properties of Sintered Tungsten Heavy Alloys

et al. 2020

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“…The change of hardness can be associated with solid to liquid phase transition during sintering. It has been widely reported that nano-oxide particles can act as the pinning points for dislocation motion and increase recrystallization temperature [8][9][10][11][12]. Therefore, it could be assumed that the presence of Y 2 O 3 altered the sintering temperatures of the model alloys, which were varied within solid state, sub-solidus state, and liquid state range [12].…”

Section: Sem Observationmentioning

confidence: 99%

“…In WHAs, nickel, iron, copper, and cobalt elements are commonly added to a tungsten matrix and serve as a binder phase, which helps in providing ductility to the materials [5][6][7]. In recent years, oxide dispersion strengthened (ODS) tungsten heavy alloys have attracted attention as potential high temperature structural materials [8][9][10][11][12]. The nano-oxide dispersed particles can be intentionally introduced or formed in-situ by mechanical alloying, which can further enhance high temperature strength and ductility of materials [6].…”

Section: Introductionmentioning

confidence: 99%

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The Effect of Mo and Dispersoids on Microstructure, Sintering Behavior, and Mechanical Properties of W-Mo-Ni-Fe-Co Heavy Tungsten Alloys

Chen

Sutrisna

2019

Metals

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W-Mo-Ni-Fe-Co heavy tungsten alloys were fabricated by mechanical alloying. The effects of Mo and oxide dipsersoids on the characteristics and properties of the model alloys were investigated. In this study, the W-Mo matrix and γ-Ni(Fe,Co) binder phase were further synthesized with Y2O3 by a secondary ball milling method. The results suggest that the microstructure and sintering behavior of the model alloys are strongly influenced by the dispersed oxide particles. The model alloys with the Y2O3 addition demonstrate grain refinement and uniform microstructure. The dispersed particles could act as an inhibitor for diffusion of tungsten atoms and grain growth, promoting the formation of solid state during sintering. Consequently, good densification, high hardness, and elastic modulus of alloys can be achieved.

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Effect of Y2O3 Addition on the Microstructure, Wear Resistance, and Corrosion Behavior of W-4.9Ni-2.1Fe Heavy Alloy

Zhang

Zhu

Zhang

et al. 2019

J. of Materi Eng and Perform

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Synthesis of ODS heavy tungsten alloys through post-annealing and secondary ball milling

Cited by 10 publications

References 20 publications

Effect of Transition Metals Oxides on the Physical and Mechanical Properties of Sintered Tungsten Heavy Alloys

Effect of Transition Metals Oxides on the Physical and Mechanical Properties of Sintered Tungsten Heavy Alloys

The Effect of Mo and Dispersoids on Microstructure, Sintering Behavior, and Mechanical Properties of W-Mo-Ni-Fe-Co Heavy Tungsten Alloys

Effect of Y2O3 Addition on the Microstructure, Wear Resistance, and Corrosion Behavior of W-4.9Ni-2.1Fe Heavy Alloy

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