Temperature dependence of hardness of titanium carbide in the homogeneity range

Samsonov, G. V.; Koval'chenko, M. S.; Dzemelinskii, V. V.; Upadyaya, G. S.

doi:10.1002/pssa.19700010217

Cited by 21 publications

(10 citation statements)

References 3 publications

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“…11). The results for series A, B and C nearly coincide and the average value observed for the microhardness is only a little higher than reported for TiCx with the same carbon to metal ratio, x [2][3][4][5].…”

Section: 3 Microhardnesssupporting

confidence: 73%

“…This serves to explain why the hardness near the free surface of the coating is higher than near the coating/substrate interface. It is noted, however, that the hardness of TiCx increases with increasing carbon to metal ratio, x [2][3][4][5]. In the present case x decreases slightly with increasing distance to the coating/substrate interface (Fig.…”

Section: 3 Microhardnessmentioning

confidence: 54%

“…hardness [2][3][4][5], carbon diffusivity [6,7], electrical resistivity [8]) depend on its carbon content x which can vary between 0.61 and 0.96 [9]. Therefore knowledge of the composition of TiC~ is important for understanding the relations between properties and deposition circumstances.…”

Section: Introductionmentioning

confidence: 99%

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Chemical constitution and microstructure of TiC x coatings chemically vapour deposited on Fe-C substrates; effects of iron and chromium

et al. 1988

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TiC x coatings were chemically vapour deposited in an industrial reactor on Fe-C substrates with carbon contents between 0.06 and 1.20wt% C. Electron probe microanalyses showed that significant amounts of chromium and iron were present in the coatings and that chromium was also present in the substrate region adjacent to the coatings. By comparing calculated and measured lattice parameters (corrected for the internal stresses present) it became evident that the chromium was in solid solution in TiC x, whereas the iron was not. This was confirmed by micro Auger electron spectroscopy and X-ray diffraction phase analyses. The carbon to metal ratio, x, of the TiC x coatings decreased with increasing distance to the coating/substrate interface. The effect of iron on the X-ray diffraction line broadening and hardness of the coatings was large (in contrast with the effect of chromium) and increased with increasing distance to the coating/substrate interface because of a decreasing iron particle size. The TiC X crystallite size was small and constant throughout the thickness of the coatings. The chromium present in the substrate region adjacent to the TiC x coatings influenced the microstructure of the substrate by formation of iron, chromium-carbides and reduced the growth rate of the coatings.

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Section: 3 Microhardnesssupporting

confidence: 73%

Section: 3 Microhardnessmentioning

confidence: 54%

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Chemical constitution and microstructure of TiC x coatings chemically vapour deposited on Fe-C substrates; effects of iron and chromium

et al. 1988

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“…[1][2][3][4] Many investigations concerning the effect of χ on deformation behavior of TiC χ at high temperature have been made so far. Samsonov 5) reported that the Vickers hardness of sintered polycrystalline TiC χ with χ from 0.73 to 0.94 decreases with decreasing χ over the temperature range room temperature to 2270 K. Spivak 6) carried out the high temperature creep test for hot-pressed polycrystalline TiC χ , 0.63 ≤ χ ≤ 0.96, at very high temperature from 2370 to 2870 K and showed that the creep rate takes a minimum around χ = 0.9. And Miracle 7) conducted Vickers hardness, four point bending and compression tests for hot pressed polycrystalline TiC χ having χ from 0.66 to 0.93 at temperature from room temperature to 1470 K and showed that the strength decreases with decreasing χ.…”

Section: Introductionmentioning

confidence: 99%

“…In these samples, and appreciable content of impurities is usually included and the impurities are liable to form second phases of low melting point at grain boundaries, [8][9][10] thereby causing grain boundary sliding at relatively lower temperature which is different from the intrinsic mechanical properties of TiC χ . [4][5][6] Further around pores stress concentration occurs depending on the size and shape of pores. In short, for sintered TiC χ the effects of impurities, grain boundaries and pores on the mechanical properties are significant.…”

Section: Introductionmentioning

confidence: 99%

Effect of C/Ti Atom Ratio on the Deformation Behavior of TiCχ Grown by FZ Method at High Temperature

Shin¹

2013

Korean. J. Mater. Res.

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In order to clarify the effect of C/Ti atom ratios(χ) on the deformation behavior of TiC χ at high temperature, single crystals having a wide range of χ, from 0.56 to 0.96, were deformed by compression test in a temperature range of 1183~2273 K and in a strain rate range of 1.9 × 10 −4~5.9 × 10 −3 s −1. Before testing, TiC χ single crystals were grown by the FZ method in a He atmosphere of 0.3 MPa. The concentrations of combined carbon were determined by chemical analysis and the lattice parameters by the X-ray powder diffraction technique. It was found that the high temperature deformation behavior observed is the χ-less dependent type, including the work softening phenomenon, the critical resolved shear stress, the transition temperature where the deformation mechanism changes, the stress exponent of strain rate and activation energy for deformation. The shape of stress-strain curves of TiC 0.96 , TiC 0.85 and TiC 0.56 is seen to be less dependent on χ, the work hardening rate after the softening is slightly higher in TiC 0.96 than in TiC 0.85 and TiC 0.56 . As χ decreases the work softening becomes less evident and the transition temperature where the work softening disappears, shifts to a lower temperature. The τ c decreases monotonously with decreasing χ in a range of χ from 0.86 to 0.96. The transition temperature where the deformation mechanism changes shifts to a lower temperature as χ decreases. The activation energy for deformation in the low temperature region also decreased monotonously as χ decreased. The deformation in this temperature region is thought to be governed by the Peierls mechanism.

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Sintering Kinetics of α-Nb2O5 in Non-Isothermal Conditions

Uskoković

Ristić

1973

Sintering and Related Phenomena

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Temperature dependence of hardness of titanium carbide in the homogeneity range

Cited by 21 publications

References 3 publications

Chemical constitution and microstructure of TiC x coatings chemically vapour deposited on Fe-C substrates; effects of iron and chromium

Chemical constitution and microstructure of TiC x coatings chemically vapour deposited on Fe-C substrates; effects of iron and chromium

Effect of C/Ti Atom Ratio on the Deformation Behavior of TiCχ Grown by FZ Method at High Temperature

Sintering Kinetics of α-Nb2O5 in Non-Isothermal Conditions

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