A Response Surface Study on the Grown Behavior and Some Mechanical Properties of Niobium Carbide Coatings

Günen, Ali; Açıkgöz, Hasan Hüseyin; Çavdar, Faruk; Karahan, İsmail Hakkı

doi:10.1142/s0218625x23500580

Cited by 4 publications

(1 citation statement)

References 25 publications

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“…It is also reported by other researchers that NbC particles have strong high-temperature stability. [26,27] It is noted that part of eutectic carbides NbC will still present even though 15Cr-22Ni-1Nb steel is homogenization treated at 1230 °C.…”

Section: Thermodynamic Consideration Of Eutectic Precipitates Dissolu...mentioning

confidence: 99%

Effect of Homogenization Treatment on Microstructure and Eutectic Precipitates in Ce‐Containing 15Cr–22Ni–1Nb Austenitic Heat‐Resistant Stainless Steel

Wang,

Zhu,

Shi

et al. 2023

steel research int.

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The effects of homogenization temperature and time on microstructure and eutectic precipitates in Ce‐containing heat‐resistant stainless steel were studied. The increase in the homogenization temperature and time promotes the diffusion of alloying elements and the transition from dendrite structure to austenitic grain. Laves phase particles were fully dissolved after the homogenization of the ingots regardless of the cerium contents and homogenization temperature and time, except for the case of the homogenization at 1130 °C for 4 hours. Honeycomb Laves phases gradually dissolve and become clusters of small blocky during homogenization treatment. The amount of eutectic NbC dissolved into the matrix is increased with the increase in the homogenization temperature and time. The solubility of niobium and carbon in austenite is increased with increasing the cerium content, which is beneficial to the dissolution of eutectic NbC. The distribution homogeneity of alloying elements in the austenitic matrix is increased with the increase in the cerium content. The homogenization temperature for reaching full diffusion of alloying elements into austenitic matrix is decreased with increasing the homogenization time. The decrease in the secondary dendrite arm spacing by cerium addition is favorable to the homogenization of alloying elements during homogenization treatment.This article is protected by copyright. All rights reserved.

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Section: Thermodynamic Consideration Of Eutectic Precipitates Dissolu...mentioning

confidence: 99%

Effect of Homogenization Treatment on Microstructure and Eutectic Precipitates in Ce‐Containing 15Cr–22Ni–1Nb Austenitic Heat‐Resistant Stainless Steel

Wang,

Zhu,

Shi

et al. 2023

steel research int.

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Effect of the incorporating of refractory NbC precipitates in intermetallic iron-aluminide coatings on corrosion and high-temperature oxidation behavior

Günen,

Altınay,

Sabun

et al. 2024

Surface and Coatings Technology

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Niobium Boronizing: Influence of the Treatment Temperature and Time

Ferreira,

Cardoso,

D’Oliveira

2023

Materials Performance and Characterization

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The application of niobium borides to components such as lamination cylinders, hightemperature devices, and medical equipment shows their importance and versatility in engineering. To improve niobium’s mechanical resistance and possible oxidation resistance at temperature, this research applied boronizing to pure niobium, carried out with double pack cementation. Boronizing at 950°C and 1,100°C was carried out for 1 and 4 h. Ekabor commercial pack mixture with a nominal chemical composition of 90 % silicon carbide, 5 % boron carbide, and 5 % potassium tetrafluoroborate was used with and without 10 percent by weight (wt%) silicon addition. Scanning electron microscope, energy dispersive spectroscopy, and X-ray diffraction analyses and microhardness tests were used to characterize the treated samples. A continuous high-hardness 2,394-HV0.1 (23.5 GPa) niobium diboride layer was formed at the surface of the niobium substrate. A maximum layer thickness of 53.6 ± 2.9 µm was measured after 4 h at 1,100°C, whereas after 1 h at 950°C, no visible layer was identified with the applied characterization techniques, suggesting a threshold in this temperature. Adding 10 wt% silicon to the pack mixture impacted the kinetics of the diffusion process, which resulted in an increase in layer thickness of 72.6 ± 10.1 µm after processing for 1 h at 1,100°C, but cracks formed in the processed surface.

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A Response Surface Study on the Grown Behavior and Some Mechanical Properties of Niobium Carbide Coatings

Cited by 4 publications

References 25 publications

Effect of Homogenization Treatment on Microstructure and Eutectic Precipitates in Ce‐Containing 15Cr–22Ni–1Nb Austenitic Heat‐Resistant Stainless Steel

Effect of Homogenization Treatment on Microstructure and Eutectic Precipitates in Ce‐Containing 15Cr–22Ni–1Nb Austenitic Heat‐Resistant Stainless Steel

Effect of the incorporating of refractory NbC precipitates in intermetallic iron-aluminide coatings on corrosion and high-temperature oxidation behavior

Niobium Boronizing: Influence of the Treatment Temperature and Time

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