High strength Ti–Fe–(In, Nb) composites with improved plasticity

Misra, Debasmita; Sohn, Seung Kook; Gabrisch, Heike; Kim, W.T.; Kim, D.H.

doi:10.1016/j.intermet.2009.08.005

Cited by 15 publications

(7 citation statements)

References 40 publications

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“…In the biaxial stress state, it is presumably that the interface could become the effective obstacles to the shear bands motion. Our observations are different to the study by Misra et al [18], in which the nanocrystals could not change the deformation mode for MG matrix under nanoindentation.…”

Section: Resultscontrasting

confidence: 99%

Micromechanical response for the amorphous/amorphous nanolaminates

et al. 2010

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Section: Resultscontrasting

confidence: 99%

Micromechanical response for the amorphous/amorphous nanolaminates

et al. 2010

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“…An evaluation of the microstructure showed bTi dendrites as a primary phase and Ti (Fe, In and/or Nb)þbTi as the eutectic structure [14].…”

Section: Introductionmentioning

confidence: 99%

Microstructure of directionally solidified Ti–Fe eutectic alloy with low interstitial and high mechanical strength

Contieri

Lopes

Cruz

et al. 2011

Journal of Crystal Growth

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“…The electrically conductive eutectic Ti 70.5 Fe 29.5 , which is highly stable, was prepared by the arc melting method described in our previous reports. 53,54 A reduced value of k was realized, due to the enhanced phonon scattering by numerous submicron lamellae interfaces of b-Ti and TiFe eutectic phases and grain boundaries. In conjunction with a reduction in thermal conductivity, the power factor is also increased due to enhanced electrical conductivity, leading to an improvement in ZT of 0.41 at 773 K for the half-Heusler (HH) TiNiSn/eutectic Ti 70.5 Fe 29.5 composite with a mass ratio of 33 : 1.…”

Section: 53mentioning

confidence: 99%

“…1(b) 29.5 alloy; this was larger than that for the equiatomic FeTi phase (0.2975 nm) owing to the dissolution of Ti, similarly to our earlier report. 53,54 The standard patterns for pure b-Ti and TiFe phase reections are also shown in Fig. 1(b) for comparison of the observed XRD patterns.…”

Section: X-ray Diffraction Analysismentioning

confidence: 99%

Improving the thermoelectric performance of TiNiSn half-Heusler via incorporating submicron lamellae eutectic phase of Ti_70.5Fe_29.5: a new strategy for enhancing the power factor and reducing the thermal conductivity

Bhardwaj

Misra

2014

J. Mater. Chem. A

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The concept of a composite derived by incorporating a second minor phase in bulk thermoelectric materials has established itself as an effective paradigm for optimizing high thermoelectric performance.In this work, the incorporation of submicron lamellae eutectic phases into cheap, abundant and nontoxic TiNiSn half-Heusler is extended for the first time to optimize its thermoelectric performance. HalfHeusler (HH) TiNiSn/eutectic Ti 70.5 Fe 29.5 composites were fabricated by employing the arc-melting route, followed by the spark plasma sintering (SPS) technique. Incorporating the metallic submicron lamellae eutectic phase of Ti 70.5 Fe 29.5 into the HH TiNiSn matrix results in a substantial increase in the power factor ($57% higher than TiNiSn HH) and simultaneous reduction ($25% lower than TiNiSn HH) in the thermal conductivity, leading to an enhanced thermoelectric figure-of-merit (ZT) of 0.41 at 773 K for the half-Heusler (HH) TiNiSn/eutectic Ti 70.5 Fe 29.5 composite with a mass ratio a 33 : 1, which is 105% higher than its counterpart TiNiSn HH. This enhancement in power factor is primarily due to an increase in electrical conductivity, resulting from the inclusion of the metallic Ti 70.5 Fe 29.5 eutectic phase, while the reduction in thermal conductivity can be ascribed to the enhanced phonon scattering by numerous lamellae interfaces of b-Ti and TiFe of the eutectic phase and also their interfaces with the HH phase.The effective value of the thermal conductivity of HH TiNiSn/eutectic Ti 70.5 Fe 29.5 composites, calculated by the effective medium theory in the light of Maxwell-Eucken approximations, matches well with the experimental value of thermal conductivity.

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High strength Ti–Fe–(In, Nb) composites with improved plasticity

Cited by 15 publications

References 40 publications

Micromechanical response for the amorphous/amorphous nanolaminates

Micromechanical response for the amorphous/amorphous nanolaminates

Microstructure of directionally solidified Ti–Fe eutectic alloy with low interstitial and high mechanical strength

Improving the thermoelectric performance of TiNiSn half-Heusler via incorporating submicron lamellae eutectic phase of Ti_70.5Fe_29.5: a new strategy for enhancing the power factor and reducing the thermal conductivity

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High strength Ti–Fe–(In, Nb) composites with improved plasticity

Cited by 15 publications

References 40 publications

Micromechanical response for the amorphous/amorphous nanolaminates

Micromechanical response for the amorphous/amorphous nanolaminates

Microstructure of directionally solidified Ti–Fe eutectic alloy with low interstitial and high mechanical strength

Improving the thermoelectric performance of TiNiSn half-Heusler via incorporating submicron lamellae eutectic phase of Ti70.5Fe29.5: a new strategy for enhancing the power factor and reducing the thermal conductivity

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Improving the thermoelectric performance of TiNiSn half-Heusler via incorporating submicron lamellae eutectic phase of Ti_70.5Fe_29.5: a new strategy for enhancing the power factor and reducing the thermal conductivity