Oxidation Behavior of Ni-10Cr Alloy under the Compressive Stress at 900 ℃

Zhou, Chang Ling; Pan, Ran; Zhang, Haiyan; Guan, X.G.

doi:10.12783/dtetr/eeec2018/26886

Cited by 2 publications

(2 citation statements)

References 22 publications

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“…Many authors were interested in thermal oxidation of pure nickel which is considered as a model material [3]. Also the high temperature oxidation of Ni-Cr alloys was investigated to determine the oxidation kinetics and scale morphologies in order to define the useful range of application [4,5,6,7]. The Ni-Cr alloys have a good combination of wear and erosion corrosion resistance besides good thermal conductivity.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of Ni- Cr Binary Alloys Produced by Conventional Powder Metallurgy

Mohamed

Kady

Lotfy

et al. 2020

KEM

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The characteristics of Ni-Cr porous alloys containing 0.5 wt%Cr up to 12 wt%Cr were determined. The alloys were prepared from a mix of Ni-particles with filamentary shape and Cr-particles with irregular shape which then mixed with 0.5 wt% paraffin wax as a binder. The samples were formed by compaction and then sintered at 1200 °C for 1 h. The microstructure of samples was found to consist of a Ni-Cr solid solution matrix with X-ray energy dispersive analysis of Cr% less than 0.33 wt%. The matrix microstructure which composed of equiaxed grains (20-60 μm) surrounded high Cr content islands which also contained γ phase (Ni2.88 Cr1.22). The apparent density of the alloys was found to decrease with Cr content from 8.32 g/cm3 for samples containing 0.5 wt%Cr to 7.26 g/cm3 for samples containing 12 wt%Cr. Therefore, the estimated porosity was found to increase from 6.4% to 16.6% with increasing Cr content from 0.5 wt% to 12 wt%. The microhardness of the samples varied from 153.6 to 284.2 VHN for the equiaxed grains and from 119.6 to 240.6 VHN for the island areas.

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Section: Introductionmentioning

confidence: 99%

Characteristics of Ni- Cr Binary Alloys Produced by Conventional Powder Metallurgy

Mohamed

Kady

Lotfy

et al. 2020

KEM

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“…The high-temperature oxidation characteristics of pure nickel pellets, which is the base metal of most of the alloys used in manufacturing the high temperature new advanced materials, represents a good base for understanding the behavior of hightemperature oxidation of Ni-base alloys. Most of the previous oxidation study on nickel was carried out on homogenous nickel with different impurity levels and at different conditions [8][9][10][11]. Therefore, there is a need for studying the oxidation characteristics of inhomogeneous nickel and nickel alloys to characterize the thermal stability of parts made from powder by compaction and sintering.…”

Section: Introductionmentioning

confidence: 99%

Effect of Preparation Parameters and Sintering Conditions on the Properties and Microstructure of Nickel Pellets Prepared by Conventional Powder Metallurgy

et al. 2020

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Eleven types of nickel pellets were prepared from two types of nickel powders. The first type of Ni powder had filamentary particles in shape with particle size less than 63 µm, the second type of Ni powder possessed nearly spherical particles in shape with particle size less than 149 µm. One type of pellets was prepared from Ni(B) powder whose particle size was reduced to less than 70 µm. The pellets were fabricated by conventional powder metallurgy. Green pellets were initially formed by compaction under 420 MPa and then sintered at 1200 °C. The dependence of the characteristics and microstructure of sintered pellets on particle shape, size of particles, powder milling, binder addition, holding time at 1200 °C, and the rate of raising green pellets temperature at the early stage of heating was investigated. Weighing in air and in floating liquid (water), measuring the sintered pellets volume, X-ray diffractometry, optical microscopy, scanning electron microscopy, X-ray energy dispersion analysis, and Vickers microhardness measurements were used to determine the properties and microstructures of fabricated pellets. The apparent density and microhardness of pellets prepared from filamentary particles with the addition of wax as a binder were the highest, about 8.23 gm/cm3 and 158 VHN, respectively.

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Oxidation Behavior of Ni-10Cr Alloy under the Compressive Stress at 900 ℃

Cited by 2 publications

References 22 publications

Characteristics of Ni- Cr Binary Alloys Produced by Conventional Powder Metallurgy

Characteristics of Ni- Cr Binary Alloys Produced by Conventional Powder Metallurgy

Effect of Preparation Parameters and Sintering Conditions on the Properties and Microstructure of Nickel Pellets Prepared by Conventional Powder Metallurgy

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