Fabrication of Cr-Ti-C composite coating by non-vacuum electron beam cladding

Krylova, T. A.; Chumakov, Yu. A.

doi:10.1016/j.matlet.2020.128022

Cited by 21 publications

(5 citation statements)

References 10 publications

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“…The second phase, wetting the grain boundaries, can be either liquid or solid [24,25]. The phenomena associated with the wetting of the GB by the second solid phase were observed in a variety of systems: aluminum-based alloys [26], titanium alloys [27], tungsten alloys [28], steels [29], superalloys [30], multicomponent alloys without the major component (so-called high-entropy one) [31], composites [32], welded and soldered joints [33]. The wetting of the GB by the second solid phase is called also GB spreading of a second solid phase.…”

Section: Introductionmentioning

confidence: 99%

Wetting of grain boundary triple junctions by intermetallic delta-phase in the Cu–In alloys

et al. 2021

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The paper studies the wetting of grain boundary triple junctions (GB TJs) by the second solid phase (intermetallic) d in the Cu-In alloys. In this system, the portion of grain boundaries in a copper-based solid solution (Cu), which are ''wetted'' by the second solid phase d, changes non-monotonically with increasing temperature. At first, the portion of such completely wetted GBs increases from zero to almost 100% when the sample is heated, and then quickly falls back to zero. The condition of complete wetting for the GB TJs (r GB [ 1.73 r SS ) is less stringent than for the GBs (r GB [ 2 r SS ). Therefore, if the transition from incomplete to complete wetting occurs with an increase in temperature, then all GB TJs should become completely wetted at a temperature T WTJ , lower than the temperature T WGB , at which all GBs become completely wetted. In this work on the Cu-In system, it was found experimentally for the first time that the wetting of the GB TJs also behaves non-monotonously. The percentage of wetted GB TJs also increases to 100% at first and then falls with increasing temperature. In this case, the portion of wetted GB TJs exceeds the portion of wetted GBs not only when it increases with increasing temperature, but also then, with the subsequent disappearance of fully wetted GBs.

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Section: Introductionmentioning

confidence: 99%

Wetting of grain boundary triple junctions by intermetallic delta-phase in the Cu–In alloys

et al. 2021

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“…The results for P1–P5 ( Table 5 ) show that the decreasing Ti content is accompanied by a further transition to multicomponent carbides, such as (FeNi)C and (FeCrNi)C occurs. The elemental distribution at point P4 indicates that the melted Cr 3 C 2 provides sufficient carbon for the precipitation of a second phase, namely (Fe, Cr, Ni)C. The results from point P5 indicate the formation of an FeNi solid solution enabled by the high Fe and Ni contents in the substrate [ 30 ].…”

Section: Resultsmentioning

confidence: 99%

Effect of Chromium Carbide Addition on the Microstructures and Properties in Dual Carbide Phases Reinforced Ni-Based Composite Coatings by Plasma Cladding

Geng

Zhang²,

Jun

et al. 2023

Materials

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Cr3C2-modified NiCr–TiC composite coatings were prepared using the plasma spraying technique for different Cr3C2 contents on the microstructure and the properties of the Ni-based TiC cladding layer were investigated. The microstructures of the coatings were characterized using scanning electron microscopy, and the friction and wear performance of the coating was evaluated by the wear tests. The results revealed that the surfaces of the Cr3C2-modified NiCr–TiC composite coatings with varying Cr3C2 contents were dense and smooth. TiC was uniformly distributed throughout the entire coating, forming a gradient interface between the binder phase of the Ni-based alloy and the hard phase of TiC. At high temperatures, Cr3C2 decomposes, with some chromium diffusing and forming complex carbides around TiC, some chromium solubilizes with Fe, Ni, and other elements. An increase in chromium carbide content leads to an upward trend in hardness. The measured hardness of the coatings ranged from 600 to 850 HV3 and tended to increase with increasing Cr3C2 content. When the mass fraction of Cr3C2 reached 30%, the hardness increased to 850 HV3, and the cracks and defects were observed in the coating, resulting in a wear resistance decline.

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“…It was established that the samples obtained using chromium as a wetting component have oxidation resistance 1.75 times higher than the reference material (steel 12Kh18N9T) [23][24][25]. The resistance of the nickel-modified materials is 1.4 times higher than that of the standard.…”

Section: Resultsmentioning

confidence: 99%

Influence of alloying (Cr, Fe, Ni) on the corrosion resistance of layers formed by electron-beam processing

et al. 2022

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The paper presents the results of comparative analysis of the properties of coatings based on chromium, nickel and iron borides. The alloy obtained in the process of electron-beam surfacing of the powder mixture “amorphous boron – 10 wt.% chromium” has the best properties. This is explained by the structures, fine chromium borides Cr2B and complex iron borides (Fe, Cr)2B, distributed in the austenitic matrix. The material modified in this way in a nitric acid solution corrodes at a rate of 0.02 mm/year. In sulfuric acid, its corrosion rate is 0.81 mm/year.

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Fabrication of Cr-Ti-C composite coating by non-vacuum electron beam cladding

Cited by 21 publications

References 10 publications

Wetting of grain boundary triple junctions by intermetallic delta-phase in the Cu–In alloys

Wetting of grain boundary triple junctions by intermetallic delta-phase in the Cu–In alloys

Effect of Chromium Carbide Addition on the Microstructures and Properties in Dual Carbide Phases Reinforced Ni-Based Composite Coatings by Plasma Cladding

Influence of alloying (Cr, Fe, Ni) on the corrosion resistance of layers formed by electron-beam processing

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