Rhenium doped chromium–alumina composites for high-temperature applications

Chmielewski, Marcin; Pietrzak, K.; Basista, Michał; Węglewski, Witold

doi:10.1016/j.ijrmhm.2015.07.012

Cited by 10 publications

(5 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Rhenium is uniformly distributed in the whole volume of the sintered samples. No evidence of rhenium dissolution in the NiCr alloy structure was found, as was the case with the sintering of rhenium and chromium-based composites [21]. Detailed elemental analyses of 90(99NiCr-1Re)-10Al2O3 composite structure were performed by the EDX method and visualized for each element in Figure 3.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Oxidation and Corrosion Resistance of NiCr-Re and NiCr-Re-Al2O3 Materials Fabricated by Spark Plasma Sintering

Pietrzak

Strojny-Nędza

Kaszyca

et al. 2020

Metals

View full text Add to dashboard Cite

The thermal and oxidation resistance of elements found in the combustion boilers of power generation plants are some of the most important factors deciding their effectiveness. This paper shows the experimental results of the influence of NiCr-based material composition on the microstructure and phase changes occurring during the oxidation and corrosion process. NiCr alloy was modified by the addition of rhenium and aluminum oxide. Materials were densified using the spark plasma sintering method at a sintering temperature of 1050 °C. Oxidation tests conducted up to 1100 °C under synthetic airflow revealed the formation of a thin Cr2O3 layer protecting the material against in-depth oxidation. Results of electrochemical corrosion in a 0.5 M NaCl solution indicated a positive role of Re and Al2O3 addition, confirmed by low corrosion current density values in comparison to the other reference materials. According to the provided positive preliminary test results, we can conclude that a NiCr-Re-Al2O3 system in coating form was successfully obtained by the plasma spraying method.

show abstract

Section: Resultsmentioning

confidence: 99%

“…Rhenium addition to the presently used materials for high-temperature applications can be beneficial as shown by our preliminary research [21]. This metal has a very high melting point (3186 • C) and high thermal stability and it is characterized by high hardness.…”

Section: Introductionmentioning

confidence: 89%

Oxidation and Corrosion Resistance of NiCr-Re and NiCr-Re-Al2O3 Materials Fabricated by Spark Plasma Sintering

Pietrzak

Strojny-Nędza

Kaszyca

et al. 2020

Metals

View full text Add to dashboard Cite

show abstract

“…rhenium or nickel) is added to the chromium matrix [14]. As reported before [15,16], the main issue related to manufacturing of this material is to obtain a uniform distribution of components in volume structure. Rhenium as a small amount partially reacts with chromium and after the sintering process chromiumrhenium solid solution is detected, but also chromium and rhenium phases separately [17].…”

Section: Introductionmentioning

confidence: 99%

Evolution of material properties during the sintering process of Cr-Re-Al2O3 composites

Chmielewski

Nosewicz

Kurpaska

et al. 2016

Composites Part B: Engineering

View full text Add to dashboard Cite

“…Recently, there have been some reports that suggest the feasibility of modifying coating materials with rhenium and the subsequent need to investigate such materials. For example, Cr-Al 2 O 3 alloyed with a 5 vol.% Re addition was investigated [ 18 ]. The authors reported an increase in hardness compared to the non-modified material.…”

Section: Introductionmentioning

confidence: 99%

Ni–Cr Powders Modified with Rhenium as a Novel Coating Material—Physical Properties, Microstructure, and Behavior in Plasma Plume

et al. 2022

View full text Add to dashboard Cite

The aim of this work was to develop a new coating material based on Ni20Cr alloy modified with up to 50%wt. rhenium. The modification was carried out by the mechanical mixing of the base powder and ammonium perrhenate with the subsequent thermoreduction in an H2 atmosphere. The obtained powder consists of a nickel–chromium core surrounded by a rhenium shell. The characterization of the powders—including their microstructure, phase and chemical composition, density, flowability, particle size distribution, and specific surface area—was performed. The influence of plasma current intensity and hydrogen gas flow on in-flight particle temperature and velocity were investigated. The results indicate that there is interdiffusion between the base Ni20Cr and the rhenium shell, resulting in intermediary solid solution(s). The modified powders have a higher specific surface area and a lower flowability, but this does not prevent them from being used as feedstock in plasma spraying. In-flight measurements reveal that increasing the content of rhenium allows for the higher temperature of particles, though it also reduces their speed.

show abstract

Rhenium doped chromium–alumina composites for high-temperature applications

Cited by 10 publications

References 21 publications

Oxidation and Corrosion Resistance of NiCr-Re and NiCr-Re-Al2O3 Materials Fabricated by Spark Plasma Sintering

Oxidation and Corrosion Resistance of NiCr-Re and NiCr-Re-Al2O3 Materials Fabricated by Spark Plasma Sintering

Evolution of material properties during the sintering process of Cr-Re-Al2O3 composites

Ni–Cr Powders Modified with Rhenium as a Novel Coating Material—Physical Properties, Microstructure, and Behavior in Plasma Plume

Contact Info

Product

Resources

About