Growth morphology and mechanism of primary TiC carbide in laser clad TiC/FeAl composite coating

Chen, Y; Wang, H.M

doi:10.1016/s0167-577x(02)00964-3

Cited by 39 publications

(12 citation statements)

References 9 publications

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“…Given that the free energy of the formation of Al 2 O 3 was less than that of TiC at the same temperature, fine particles of Al 2 O 3 were formed in the early stages of nucleation and remained in the melt. When there are enough elements to form the titanium carbide in the melt, aluminum oxide can act as the preferred primer for non-homogeneous titanium carbide nucleation [9,24,25]. Figures 7b,c show the EDS analyses of TiC and Al 2 O 3 particles in Fig.…”

Section: Resultsmentioning

confidence: 99%

In-situ fabrication of TiC-Al2O3 and TiB2-TiC-Al2O3 composite coatings on 304 stainless steel surface using GTAW process

Bahramizadeh¹,

Nourouzi²,

Aval³

2020

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The purpose of this study was to improve the performance of 304 stainless steel by applying a wear-resistant coating. For this purpose, in-situ composite coatings of TiC-Al2O3, as well as TiB2-TiC-Al2O3, were applied on the surface of 304 stainless steel by using combining, welding and self-combustion synthesis with different current welding. The microstructural investigations of the coated layers showed that due to the high incoming welding temperature in all the samples, by performing the combustion synthesis reaction, significant reinforcing particles were formed on the 304 stainless steel surface. Also, in all heat inputs, cubic titanium carbide particles formed inhomogeneously on Al2O3 particles or spontaneously in the austenitic matrix of 304 stainless steel. The reinforcing of TiC and TiB2 particles formation in both 3TiO2-4Al-3C and 3TiO2-4Al-B4C layers led to an increase in surface hardness and wear resistance up to 2.5 versus the substrate.

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Section: Resultsmentioning

confidence: 99%

In-situ fabrication of TiC-Al2O3 and TiB2-TiC-Al2O3 composite coatings on 304 stainless steel surface using GTAW process

Bahramizadeh¹,

Nourouzi²,

Aval³

2020

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“…However, TiB 2 cannot exist stably and will simultaneously react with the titanium matrix by the following reaction owning to the excess of titanium in this system. Ti + TiB 2 = 2TiB (14) As shown in Fig. 4, the result of thermodynamic calculations reveals that the reaction can also spontaneously oc- cur.…”

Section: Thermodynamic Predictionsmentioning

confidence: 85%

“…Laser cladding of ceramic-metal composite coatings onto titanium alloy substrate has become the focus of various investigations in past years. Among these studies, most of ceramic phases such as WC [9][10][11], TiN [12], TiC [13][14][15], SiC [16], ZrO 2 [17], and Al 2 O 3 [18] are directly added into coatings. Cracks may propagate from the interface because the surface of these particles is not clean or is contaminated, which will prevent the technique from being extensively applied.…”

Section: Introductionmentioning

confidence: 99%

Microstructural characterization of titanium matrix composite coatings reinforced by in situ synthesized TiB + TiC fabricated on Ti6Al4V by laser cladding

Wang

et al. 2010

Rare Metals

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Titanium-based composite coatings reinforced by in situ synthesized TiB and TiC particles between titanium and B 4 C were successfully fabricated on Ti6Al4V by laser cladding. Phase constituents of the coatings were predicted by thermodynamic calculations in the Ti-B 4 C-Al and Ti-B-C-Al systems, respectively, and were validated well by X-ray diffraction (XRD) analysis results. Microstructural and metallographic analyses were made by scanning electron microscopy (SEM) and electron probe micro-analysis (EPMA). The results show that the coatings are mainly composed of α-Ti cellular dendrites and the eutecticum in which a large number of needle-shaped TiB and a few equiaxial TiC particles are embedded. C is enriched in α-Ti cellular dendrites and far exceeds the theoretical maximum dissolubility, owing to the extension of saturation during laser cladding. The coatings have a good metallurgical bond with the substrate due to the existence of the dilution zone, in which a great amount of lamella β-Ti grains consisting of a thin needle-shaped martensitic microstructure are present and grow parallel to the heat flux direction; a few TiB and TiC reinforcements are observed at the boundaries of initial β-Ti grains.

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“…In addition, FeAl intermetallic matrix composite coatings with TiC as reinforcement have been produced for wear resistance at high temperatures [25,26]; TiC is found to be a suitable reinforcement because of its excellent high temperature stability, high hardness and low density;…”

Section: Overlay Coatings 21 Joining Techniquesmentioning

confidence: 99%

Transition Metal Aluminide Coatings and Initial Steps on Additive Manufacturing

Luis¹

2018

Intermetallic Compounds - Formation and Applications

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During the last decades, Fe-, Ni-and Ti-based aluminides have been studied in terms of bulk materials with an effort to develop alloying and processing strategies to overcome their low ductilities and toughness compared to conventional alloys. Whenever significant improvements can be addressed in this direction, they will be opened to an extensive range of industrial applications, especially those related to high temperature resistance requirements. In parallel, progressing interest has also been focused on their application as protective layers. This chapter is intended to provide a review of the evolution that has been made mainly during the last two decades of the several coating technologies devoted for this purpose. From thick to thin coatings are revised, with insight into coating microstructures and properties as well. Lack of space has forced the selection of those technologies arising most interest within last years; therefore, the content will follow this order: joining (laser cladding and electrospark deposition), thermal spraying (high velocity oxygen fuel and cold spraying) and physical vapor deposition (magnetron sputtering and cathodic arc deposition).

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Growth morphology and mechanism of primary TiC carbide in laser clad TiC/FeAl composite coating

Cited by 39 publications

References 9 publications

In-situ fabrication of TiC-Al2O3 and TiB2-TiC-Al2O3 composite coatings on 304 stainless steel surface using GTAW process

In-situ fabrication of TiC-Al2O3 and TiB2-TiC-Al2O3 composite coatings on 304 stainless steel surface using GTAW process

Microstructural characterization of titanium matrix composite coatings reinforced by in situ synthesized TiB + TiC fabricated on Ti6Al4V by laser cladding

Transition Metal Aluminide Coatings and Initial Steps on Additive Manufacturing

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