High strength bulk tantalum with novel gradient structure within a particle fabricated by spark plasma sintering

Zhang, Y.S.; Zhang, X.M.; Wang, Gui; Bai, X.F.; Pan, Tan; Li, Z.K.; Yu, Zhentao

doi:10.1016/j.msea.2011.08.026

Cited by 21 publications

(6 citation statements)

References 18 publications

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“…4e). Therefore, the formation of the present core-shell structure can be attributed to occurrence of α and β phase transformations, in contrast to the gradient N structure in Ta which has not experienced phase transformations21.…”

Section: Resultsmentioning

confidence: 73%

“…The present SPS process consolidates powders in a short time and under a high pressure which impedes the grain growth and solute diffusion20. However, our previous work indicated that SPS of nitrided Ta particles only prepared a gradient N concentration without core-shell structure21. During SPS of Ta, current and Joule heat are focused at the neck between the particles, resulting in a temperature gradient from particle center to surface22, this temperature gradient confined the N diffusion and resulted in the gradient N structure.…”

Section: Resultsmentioning

confidence: 86%

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Core-shell structured titanium-nitrogen alloys with high strength, high thermal stability and good plasticity

Zhang

Zhao

Zhang

et al. 2017

Sci Rep

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Multifunctional materials with more than two good properties are widely required in modern industries. However, some properties are often trade-off with each other by single microstructural designation. For example, nanostructured materials have high strength, but low ductility and thermal stability. Here by means of spark plasma sintering (SPS) of nitrided Ti particles, we synthesized bulk core-shell structured Ti alloys with isolated soft coarse-grained Ti cores and hard Ti-N solid solution shells. The core-shell Ti alloys exhibit a high yield strength (~1.4 GPa) comparable to that of nanostructured states and high thermal stability (over 1100 °C, 0.71 of melting temperature), contributed by the hard Ti-N shells, as well as a good plasticity (fracture plasticity of 12%) due to the soft Ti cores. Our results demonstrate that this core-shell structure offers a design pathway towards an advanced material with enhancing strength-plasticity-thermal stability synergy.

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Section: Resultsmentioning

confidence: 73%

Section: Resultsmentioning

confidence: 86%

Core-shell structured titanium-nitrogen alloys with high strength, high thermal stability and good plasticity

Zhang

Zhao

Zhang

et al. 2017

Sci Rep

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“…Recently, new attempts have been made to produce both solid and porous Ta parts using novel manufacturing techniques such as Laser Engineered Net Shaping (LENS™) [76,77], Spark Plasma Sintering (SPS) [78] and Selective Laser Melting (SLM) [79,80]. Selective Laser Melting is an additive manufacturing technology in which a focused laser beam melts thin layers of metal powder together in order to create fully dense functional parts [81].…”

Section: Introductionmentioning

confidence: 99%

Additively manufactured porous tantalum implants

et al. 2015

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“…Generally, increase in SPS pressure results in better densification and higher relative density of metallic and alloyed parts fabricated by SPS [18,20,40,[46][47][48][49][50][51], as depictedin Fig. 6.…”

Section: Sps Pressurementioning

confidence: 99%

The densification behavior of metals and alloys during spark plasma sintering: A mini-review

Sovizi

Seraji

2019

Sci Sintering

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As of today, metals and alloys are widely utilized as structural, mechanical, electrical, and magnetic materials in every aspect of technology and industry. The complexity and diversity of metals applications emphasize the need for a new production method to quickly and easily manufacture metallic components. Spark plasma sintering as a new solidstate sintering method has been recently developed to respond to these needs. Up to now, numerous papers and researches have been published in the field of spark plasma sintering and its ability to manufacture metallic samples. Density is a significant property that has a great influence on the physical, mechanical, and functional properties of metallic parts. To the best of our knowledge, there is no concrete paper that reviews the densification behavior of metals and alloys during spark plasma sintering and the effect of its parameters on the density of metallic samples. As a result, this article dedicated to addressing this need. In this mini-review, after a short description of spark plasma sintering method, the effects of each sintering parameters on densification behavior of metals and alloys are studied, and possible physical and microstructural factors which have the effect of densification behavior of metallic samples at various sintering conditions are reviewed. Finally, the recent advances in finite element modeling, which study the temperature and stress inhomogeneity in the SPS process, have been reviewed in this paper.

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High strength bulk tantalum with novel gradient structure within a particle fabricated by spark plasma sintering

Cited by 21 publications

References 18 publications

Core-shell structured titanium-nitrogen alloys with high strength, high thermal stability and good plasticity

Core-shell structured titanium-nitrogen alloys with high strength, high thermal stability and good plasticity

Additively manufactured porous tantalum implants

The densification behavior of metals and alloys during spark plasma sintering: A mini-review

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