Effect of Rhenium addition on tungsten heavy alloys processed through spark plasma sintering

Prasad, B. Sasi; Annamalai, A. Raja

doi:10.1016/j.asej.2021.02.022

Cited by 11 publications

(8 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The nickel(II) oxide obtained in this way was the suitable material for the reaction with perrhenic acid. In this way, the Ni-Re solution (4) was formed, which was subsequently evaporated to dryness (5). The obtained precipitate was washed with methanol (6) and then dried (7).…”

Section: Discussionmentioning

confidence: 99%

“…In a powdered form, it is characterized by a silvery-gray color. It has a hexagonal network (A3), which it retains up to the melting point-3453 K (3180 • C) (only tungsten and carbon have higher melting points), and thanks to which it is not subject to ductile-brittle transformation [3][4][5]. Rhenium, thanks to its resistance to high temperatures and a very good strength, is used in the production of superalloys, mainly nickel-based ones, from which turbine blades for aircraft engines and gas turbines are made [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

“…It has a hexagonal network (A3), which it retains up to the melting point-3453 K (3180 • C) (only tungsten and carbon have higher melting points), and thanks to which it is not subject to ductile-brittle transformation [3][4][5]. Rhenium, thanks to its resistance to high temperatures and a very good strength, is used in the production of superalloys, mainly nickel-based ones, from which turbine blades for aircraft engines and gas turbines are made [5][6][7]. The addition of 1-7% of Re to the nickel-based alloy not only contributes to improving its high temperature strength, but also prevents fatigue cracking [1, 3,8].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A New Method of Obtaining High Purity Nickel(II) Perrhenate from Waste

Leszczyńska-Sejda,

Benke,

Kopyto

et al. 2023

Crystals

View full text Add to dashboard Cite

The article presents a new method of producing anhydrous nickel(II) perrhenate of high purity, entirely from waste from the national Cu industry. This method consists mainly of the reaction of water-washed nickel(II) oxide (obtained by purification in a mixture of alcohols, and subsequent roasting of the Ni-containing sulfate semi-finished products (NSP) at 1200 °C) with perrhenic acid (obtained using the ion exchange method). After the dissolution of nickel(II) oxide in the acid (at a temperature in the range of 60–80 °C) and obtaining a pH of 5–8, the solution is sent to evaporate to dryness, also at a temperature not exceeding 80 °C. The obtained crude nickel(II) perrhenate is washed with methanol and subsequently dried at 160 °C to obtain its anhydrous form, with the following composition: 10.5% of Ni; 66.6% of Re; <5 ppm of Bi, As, Zn and Cu; <10 ppm Co, Mg, Fe, K, Pb, Na, Ca and Mo. Importantly, this composition allows for the use of the compound for the production of superalloys and catalysts. A patent application and a technological scheme were prepared for the developed method. It consists of seven technological operations, including six based on processes in the field of hydrometallurgy, and one in the field of pyrometallurgy (roasting).

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A New Method of Obtaining High Purity Nickel(II) Perrhenate from Waste

Leszczyńska-Sejda,

Benke,

Kopyto

et al. 2023

Crystals

View full text Add to dashboard Cite

show abstract

“…[17,213] For sintered products, improving the density, refining, and homogenizing the microstructure are critical to many application-oriented properties, including solving the brittleness problem of W alloys. With the above context, there were attempts in literatures for easy densification and the control of grain growth, including: i) preparing nanosized powders prior to sintering, [61,78,91,215] ii) using assisted sintering techniques to increase the capillary driven force for rapidly densification, [61,[190][191][192][193]216] and iii) based on (i) and (ii), further adding oxides, nitrides and carbides to stabilize the grain structure during high-temperature sintering. [48,218,219] Figure 11 shows the development timeline of bulk W-Re alloys produced by PM.…”

Section: Tungsten-rhenium Alloysmentioning

confidence: 99%

Powder Metallurgy Route to Ultrafine‐Grained Refractory Metals

Zhang

et al. 2023

Advanced Materials

View full text Add to dashboard Cite

Ultrafine‐grained (UFG) refractory metals are promising materials for applications in aerospace, microelectronics, nuclear energy, and many others under extreme environments. Powder metallurgy (PM) allows to produce such materials with well‐controlled chemistry and microstructure at multiple length scales and near‐net shape manufacturing. However, sintering refractory metals to full density while maintaining a fine microstructure is still challenging due to the high sintering temperature and the difficulty to separate the kinetics of densification versus grain growth. Here an overview of the sintering issues, microstructural design rules, and PM practices towards UFG and nanocrystalline refractory metals are sought to be provided. The previous efforts shall be reviewed to address the processing challenges, including the use of fine/nanopowders, second‐phase grain growth inhibitors, and field‐assisted sintering techniques. Recently, pressureless two‐step sintering has been successfully demonstrated in producing dense UFG refractory metals down to ≈300 nm average grain size with a uniform microstructure and this technological breakthrough shall be reviewed. PM progresses in specific materials systems shall be next reviewed, including elementary metals (W and Mo), refractory alloys (W‐Re), refractory high‐entropy alloys, and their composites. Last, future developments and the endeavor towards UFG and nanocrystalline refractory metals with exceptionally uniform microstructure and improved properties are outlined.

show abstract

“…Given the above study, the present work aims to fabricate Ni-17Cr-10X(X= Mo, W, Ta) ternary alloys through spark plasma sintering (SPS) technique and investigate their mechanical and tribological characteristics. SPS technique is an unconventional method consolidating metallic powders (Lakshmi Prasad and Raja Annamalai, 2021; Akinribide et al , 2020). The technique ensures the development of quality materials void of impurities with high densification within a relatively shorter processing time (Buckley et al , 2021; Akinwamide et al , 2020), which makes it different from conventional sintering routes.…”

Section: Introductionmentioning

confidence: 99%

Mechanical and tribological studies of sintered nickel-based ternary alloys

Babalola

Akinribide

Akinwamide

et al. 2021

WJE

View full text Add to dashboard Cite

Purpose During the operation of nickel-based alloys as blades and discs in turbines, the sliding activity between metallic surfaces is subjected to structural and compositional changes. In as much as friction and wear are influenced by interacting surfaces, it is necessary to investigate these effects. This study aims to understand better the mechanical and tribological characteristics of Ni-17Cr-10X (X = Mo, W, Ta) ternary alloy systems developed via spark plasma sintering (SPS) technique. Design/methodology/approach Nickel-based ternary alloys were fabricated via SPS technique at 50 MPa, 1100 °C, 100 °C/min and a dwell time of 10 mins. Scanning electron microscopy, X-Ray diffraction, energy dispersive X-ray spectroscopy, nanoindentation techniques and tribometer were used to assess the microstructure, phase composition, elemental dispersion, mechanical and tribological characteristics of the sintered nickel-based alloys. Findings The outcome of the investigation showed that the Ni-17Cr10Mo alloy exhibited the highest indentation hardness value of 8045 MPa, elastic modulus value of 386 GPa and wear resistance. At the same time, Ni-17Cr10W possessed the least mechanical and wear properties. Originality/value It can be shown that the SPS technique is efficient in the development of nickel-based alloys with good elemental distribution and without defects such as segregation of alloying elements, non-metallic inclusions. This is evident from the scanning electron microscopy micrographs.

show abstract

Effect of Rhenium addition on tungsten heavy alloys processed through spark plasma sintering

Cited by 11 publications

References 9 publications

A New Method of Obtaining High Purity Nickel(II) Perrhenate from Waste

A New Method of Obtaining High Purity Nickel(II) Perrhenate from Waste

Powder Metallurgy Route to Ultrafine‐Grained Refractory Metals

Mechanical and tribological studies of sintered nickel-based ternary alloys

Contact Info

Product

Resources

About