Material Characterization of Ni Base Alloy for Very High Temperature Reactor

Kim, Dong-Jin; Lee, Gyeong-Geun; Kim, Dae Jong; Jeong, Su Jin

doi:10.1016/j.jmst.2013.09.022

Cited by 17 publications

(3 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Metal-ceramic composites based on NiCr-Al 2 O 3 have attracted a lot of attention because of their exceptional mechanical properties and wear resistance and their thermal and chemical stability at high temperatures, which makes them excellent candidates for the manufacture of antifriction materials [8,9]. Also, aluminium and chromium oxides have the same crystal structure and form solid solutions over the entire composition range, contributing to achieving a good bond between Al 2 O 3 and Cr [10].…”

Section: Introductionmentioning

confidence: 99%

Effect of the detonation-spraying mode on the tribological properties of NiCr-Al2O3 coatings

Rakhadilov¹,

Буйткенов²,

Kabdykenova³

et al. 2021

Eurasian J. Phys. Funct. Mater.

View full text Add to dashboard Cite

The article presents the study results of detonation spraying parameters on the phase composition and tribological properties of NiCr-Al2O3 powder coatings. The spraying was carried out at a ratio of the acetylene-oxygen mixture O2 /C2H2=1.856. The detonation barrel filling volume with an explosive gas mixture varied from 30% to 68%. It is determined that the phase composition of the NiCr-Al2O3 coatings varies depending on the degree of detonation barrel filling. With an increase in the detonation barrel’s filling volume, the intensity of the NiCr diffraction peaks is decreased, and the intensity of the a-Al2O3 reflexes is increased, which indicates an increase in the content of the Al2O3 phase. When low filling volume, there is determined a low coating density and uneven roughness. The tribological test results showed that with an increase in the detonation barrel filling volume, there is a decrease in the wear volume, which confirms the increase in the coatings wear resistance. Determined that the lowest friction coefficient was recorded in the sample obtained at the barrel filling volume 68%. The coatings’ high wear resistance is associated with an increase in the alpha phase volume fraction of a-Al2O3 and coatings density.

show abstract

Section: Introductionmentioning

confidence: 99%

Effect of the detonation-spraying mode on the tribological properties of NiCr-Al2O3 coatings

Rakhadilov¹,

Буйткенов²,

Kabdykenova³

et al. 2021

Eurasian J. Phys. Funct. Mater.

View full text Add to dashboard Cite

show abstract

“…Compacted graphite iron has garnered more attention for its high strength, similar to nodular iron, and high thermal conductivity, comparable to the gray iron, while wear often takes place in compacted graphite iron engine parts, especially at high temperature [4][5][6]. Nickel-based alloys are widely used in anti-corrosion and wear-resistant applications for their excellent high-temperature properties [7][8][9][10]. Nickel and chromium are elements used at high temperature for their lower decrease of high temperature hardness than others.…”

Section: Introductionmentioning

confidence: 99%

Effect of Vacuum Annealing on the Nickel-Based Coatings Deposited on a CGI Cast Iron through Atmospheric Plasma Spraying

Gao

Chen

Zeng

et al. 2020

Metals

View full text Add to dashboard Cite

Plasma-sprayed nickel-based self-fusion alloy coatings were annealed in a vacuum at 990, 1020 and 1050 °C for 20 min to increase the bonding between the compacted graphite cast iron substrate and coating, as well as the inner cohesion of the coatings. It was found that nickel and chromium diffused between nickel-based alloy coatings and compacted graphite cast iron substrate. A metallurgical translation zone with a thickness up to 1145 μm formed during the vacuum annealing, which resulted in an enhancement of the adhesion between the coating and substrate. The adhesion strength at room temperature was increased from the as-sprayed coating of 33.4 MPa to the annealed one of 163 MPa. Meanwhile, the adhesion strength at 500 °C reached 146 MPa. Conversely, the inner cohesion of the coating was improved with the particles’ interfaces healed after vacuum annealing. The micro-hardness of the annealed coatings was increased to 902 HV from the as-sprayed one of 578 HV.

show abstract

“…The ideas underlying genetics, metallurgical heredity respectively, appeared in more than 50 years ago in different references [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. In the broad metallurgical sense heredity is the description of those properties of metals that are not only based on status, but depend on their past [3].…”

mentioning

confidence: 99%

Mathematical Processing and Structural Explanation of Surface Tension Polythermal Diagram Reached Out to Achieve Critical Temperature of Thermo-time Treatment for a Ni Based Superalloy

Rucai¹,

Constantin²,

Ciucă³

et al. 2019

Rev. Chim.

View full text Add to dashboard Cite

Thermo-Time Treatment of multicomponent melting can be foreshadowed by the polythermal diagrams analysis of main physical and chemical properties, which are considered for this purpose as structural-sensitive properties: viscosity, surface tension, density or electrical conductivity [1]. Critical temperature (Tcr), i.e. temperature at which or around which, must run Thermo-Time Treatmenthas been experimentally marked by a sudden and seemingly contradictory deviation on polythermal diagrams of surface tension, s(T), reached out at cooling process for Ni base studied superalloy (MSRR 7045). A possible mathematical processing of it, is given by interpolation curves of the surface tensiondependence on temperature.

show abstract

Material Characterization of Ni Base Alloy for Very High Temperature Reactor

Cited by 17 publications

References 8 publications

Effect of the detonation-spraying mode on the tribological properties of NiCr-Al2O3 coatings

Effect of the detonation-spraying mode on the tribological properties of NiCr-Al2O3 coatings

Effect of Vacuum Annealing on the Nickel-Based Coatings Deposited on a CGI Cast Iron through Atmospheric Plasma Spraying

Mathematical Processing and Structural Explanation of Surface Tension Polythermal Diagram Reached Out to Achieve Critical Temperature of Thermo-time Treatment for a Ni Based Superalloy

Contact Info

Product

Resources

About