Formation of titanium carbide on graphite via powder immersion reaction assisted coating

Yin, Xiaowei; Gotman, I.; Klinger, L.; Gutmanas, E.Y.

doi:10.1016/j.msea.2005.01.011

Cited by 54 publications

(23 citation statements)

References 23 publications

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“…However, the adherence of the coating on the substrate is not good enough to completely prevent peeling of the coating. 12,13) In addition, it is reported that the adherence of the PVD produced coating deteriorates during the immersion in a simulated body fluid.…”

Section: Introductionmentioning

confidence: 99%

TiC Coating on Titanium by Carbonization Reaction Using Spark Plasma Sintering

2013

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Hard TiC coating layer is formed on commercially pure titanium by heat treatment in a spark plasma sintering (SPS) mold filled with graphite powder. In case of heat treatment at 1243 K for 3600 s, the obtained thickness of the coating layer is about 10 µm and almost uniform. This coating itself consists of TiC and graphite, and there is no titanium oxide detected by X-ray diffractometer (XRD). Vickers hardness tests have revealed that the hardness of titanium coating is 1600 HV, which is much higher than that of the titanium substrate (130 HV). The hard TiC coating on titanium is considered to be advantageous when applied to load bearing parts of hard tissue replacements. The growth behavior of TiC is parabolic with an activation energy of 218.6 kJ/mol. This value is close to the activation energy of carbon diffusion in TiC. Therefore, the growth rate of TiC is rate-controlled by inward diffusion of carbon in the TiC phase.

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Section: Introductionmentioning

confidence: 99%

TiC Coating on Titanium by Carbonization Reaction Using Spark Plasma Sintering

2013

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“…The formation of TiC at the bonded interface is possible and consistent with both theoretical thermodynamics and experimental data. [12][13][14][15] X-ray diffraction patterns for the extruded Ti composite materials reinforced with in situ formed TiC particles are shown in Fig. 4.…”

Section: Methodsmentioning

confidence: 99%

Mechanical Properties of a Titanium Matrix Composite Reinforced with Low Cost Carbon Black via Powder Metallurgy Processing

et al. 2009

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A powder metallurgy (P/M) titanium matrix composite (TMC) reinforced with low cost carbon black was prepared by spark plasma sintering (SPS) and hot extrusion. Carbon black particles were added for the in situ formation of TiC dispersoids during the SPS process. Two kinds of titanium (Ti) powders, sponge and fine Ti, were coated with carbon black particles via a wet process using a zwitterionic solution containing carbon black spheres. The distribution of the particles on the Ti powder surface before the consolidation process was imaged using scanning electron microscopy (SEM). We evaluated the microstructure and mechanical properties of extruded pure Ti matrix composites reinforced with TiC particles. The morphology and distribution of the in situ TiC phases were investigated using optical microscopy and SEM with the help of an EDS analyzer. The mechanical properties of these composites were remarkably improved by adding a small amount of carbon black at 0:07$0:16 mass%. The increases in the yield stress of the extruded sponge and fine TMC were 70.0 and 291 MPa, while the tensile strength increases were 67 and 231 MPa, respectively, compared to those of extruded pure Ti with no reinforcement. Finally, the fractured surfaces of TMC specimens after tensile testing were observed. The benefits of the wet process and the use of carbon black additives are discussed in detail.

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“…By comparing samples S 6 and S 1 (with 2mol Mg), it can be concluded that the formation of Mg 2 TiO 4 as a by-product mainly depends on the Mg value in the system. In the stoichiometric composition, it is assumed that all the amount of the TiO 2 is reduced during the magnesiothermic reaction (6) and there is no excess value to react with formed MgO to formulate magnesium titanate compounds. As mentioned before, the amount of Mg as a dilution is one of the key factors that control the adiabatic reaction temperature T ad and consequently change the reaction mode from MSR to gradual [1,7].…”

Section: Under Stoichiometric Samples (S 3 -S 5 )mentioning

confidence: 99%