Influence of process parameters and rare earth content on the properties of niobium carbide coatings synthesized by pack cementation

Li, Shuai; Wang, Ruike; You, Zongying; Sun, Caiyuan; Sun, Yingjuan; Zhang, Ganghao; Li, Songxia; Zhang, Jin

doi:10.1088/2053-1591/ab5257

Cited by 8 publications

(3 citation statements)

References 26 publications

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“…And it was found that the addition of rare earths promoted the growth rate, reduced the grain size, and improved brittleness of prepared coating. Shuai Li [15] et al found that niobium carbide coatings prepared under 1.5 wt% La 2 O 3 conditions had the best wear resistance and the wear volume was substantially reduced.…”

Section: Prefacementioning

confidence: 99%

Effect of rare earth on microstructure and properties of niobiumizing layer on GCr15 steel for pin shaft

Meng¹,

Shang²,

Zhang³

et al. 2022

Mater. Res. Express

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The powder pack cementation was used for niobiumizing treatment of GCr15 pin steel, and the effects of different rare earth types and contents on microstructure and properties of niobiumizing layer were investigated. Optical microscope, X-ray diffractometer, scanning electron microscope, electrochemical workstation and ball-disk friction wear machine were used to observe the structure and evaluate the properties of the niobiumizing layer. And the kinetics and mechanism of niobiumizing layer with rare earths was explored. The results show that a dense and continuous niobiumizing layer formed under different rare earth types and contents condition. The layer is 3 μm-15 μm in average thickness, 1800 HV0.2-2500 HV0.2 in average microhardness and is composed of NbCx compound and α-Fe. Comprehensive comparison, La2O3 can significantly improve the wear and corrosion resistance of the niobiumizing layer. The self-corrosion potential of niobiumizing layer is -0.5759 V, the corrosion current density is 5.2365×10-7 A/cm2, and the average friction coefficient is 0.385 when La2O3 is added at 2%.

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Section: Prefacementioning

confidence: 99%

Effect of rare earth on microstructure and properties of niobiumizing layer on GCr15 steel for pin shaft

Meng¹,

Shang²,

Zhang³

et al. 2022

Mater. Res. Express

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“…With the development of the aerospace and automotive industries, the traditional Ni-based superalloys are difficult to meet the requirements of the future hightemperature materials with the high melting point and excellent mechanical properties. [1][2][3][4][5][6][7][8][9] Therefore, it is necessary to explore novel high-temperature structural materials that can be used in higher operating temperatures. [10][11][12][13] Among these high-tempera materials, transition metal silicides have attracted much attention as candidate materials to replace Ni-based superalloys.…”

Section: Introductionmentioning

confidence: 99%

First‐principles investigation of solution mechanism of C in TM‐Si‐C matrix as the potential high‐temperature ceramics

Pan

2021

J Am Ceram Soc.

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Although the TM-Si-C ternary compounds are promising advanced ceramics, the solution mechanism of C element in TM-Si matrix is entirely unclear. In particular, the influence of C on the mechanical properties of TM-Si matrix is no clear. To solve the problem, we apply the first-principles calculations to study the occupied mechanism of C in TM 5 Si 3 silicides. In addition, the influence of C element on the mechanical properties of TM 5 Si 3 is further studied. Here, two typical TM 5 Si 3 phases: D8 l -Ta 5 Si 3 and D8 m -Mo 5 Si 3 are considered. For C-doping, six C interstitial sites,

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“…In this TRD process, nitrogen/carbon or boron, which is available in the substrate, forms a deposited layer with a nitride/carbide or boride-forming element (NFE/CFE or BFE) such as tungsten, chromium, vanadium, molybdenum or tantalum. A diffusion layer (5-15 μm) can be formed using salt bath [6,7], fluidized bed [8,9] or pack cementation [10][11][12][13] when exposed to temperatures ranging from 800 to 1250°C with a time interval of 0.5-10 h.…”

Section: Introductionmentioning

confidence: 99%

Effect of duplex coating (VC–VN) on forming mandrel for better wear resistance

Hariramkumar

Natarajan

2020

Surface Engineering

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The present work aims at investigating the collective function of thermo-reactive diffusion (TRD) and plasma-nitriding duplex coating (vanadium carbide (VC) and vanadium nitride (VC-VN)) on the wear resistance of AISI M2 axial-forming mandrel. TRD process was carried out in molten salt bath furnace at 1020 ± 25°C for 5-6 h and the samples were subjected to vacuum heat treatment process at 1150°C, followed by plasma-nitriding for 1 h at 550°C. Wear properties were examined by subjecting the VC and VC-VN-coated samples to wear test (pin on disc) at normal and elevated temperature (50°and 150°C) with lubrication. Phase composition, surface morphology and elemental mapping were studied through X-ray diffractometer, SEM and EDS analyses, respectively. Study found that the wear resistance of VC-coated samples was higher than VC-VN-coated samples and wear mechanisms for VC and VC-VN coated specimens were assessed to be abrasive and abrasive-oxidative in nature, respectively.

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Influence of process parameters and rare earth content on the properties of niobium carbide coatings synthesized by pack cementation

Cited by 8 publications

References 26 publications

Effect of rare earth on microstructure and properties of niobiumizing layer on GCr15 steel for pin shaft

Effect of rare earth on microstructure and properties of niobiumizing layer on GCr15 steel for pin shaft

First‐principles investigation of solution mechanism of C in TM‐Si‐C matrix as the potential high‐temperature ceramics

Effect of duplex coating (VC–VN) on forming mandrel for better wear resistance

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