The liquid phase sintering of molybdenum with Ni and Cu additions

Hwang, K. S.; Huang, H.S.

doi:10.1016/s0254-0584(00)00425-9

Cited by 31 publications

(12 citation statements)

References 9 publications

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“…The sintering temperature is established from the point of the maximum sample shrinkage, i.e., the maximum density that can be achieved for the sample. Dilatometric studies have also been employed by other investigators to determine sintering temperature [54,55]. During continuous heating of a sample with a dilatometer, the change in the length (dL) and temperature (T) as a function of time were recorded.…”

Section: Resultsmentioning

confidence: 99%

Biphasic calcium phosphate nanocomposite porous scaffolds for load-bearing bone tissue engineering

2004

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Section: Resultsmentioning

confidence: 99%

Biphasic calcium phosphate nanocomposite porous scaffolds for load-bearing bone tissue engineering

2004

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“…Hwang and Huang [7] have shown how increased sintered density of Mo compacts can be obtained by liquid phase sintering and adding sintering aids, Ni and Cu. With 1.5 wt.% Ni sintered at 1370 • C, the sintered density of Mo increased from 86.0 to 97.5%.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of liquid phase sintering through Al–Si additions to Al–Cu systems

Delgado

Ruiz-Navas

Gordo

et al. 2005

Journal of Materials Processing Technology

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“…2-D interfacial phases) [13,48]. While Hwang and Huang [53,14,54] earlier proposed the formation of δ-NiMo intermetallic compounds at the Mo GB as the cause of embrittlement, more recent work by one of the co-authors of the present work has shown that δ-NiMo intermetallic compounds does not wet the general GBs of Mo, as the dihedral angles are > 100…”

Section: Discussionmentioning

confidence: 74%

Computational study of metallic dopant segregation and embrittlement at molybdenum grain boundaries

Tran

Zhou

et al. 2016

Acta Materialia

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Mo and its alloys have been widely used as refractory materials owing to their excellent high temperature properties, but a critical limitation is their low ductility. Doping the grain boundaries (GBs) of Mo with metals such as Zr or Al have previously been demonstrated as a promising approach to address this shortcoming, whereas other alloy elements are known to embrittle the GBs. In this work, we investigated the segregation and strengthening/embrittling effects of 29 metallic dopants at the Σ5 (310) tilt and Σ5 (100) twist Mo GBs using density functional theory (DFT) calculations and empirical continuum models. In agreement with previous works for other metals, we find that the strain, as measured by the relative metallic radius versus Mo, is a good predictor of the segregation tendency, while the difference in cohesive energies between the dopant and Mo is a good predictor of the strengthening/embrittling effect. However, we find that dopant chemistry also plays a significant role in affecting segregation behavior at GBs, particularly in driving the formation of intermetallic precipitates or 2-D interfacial phases (complexions). We also show that the site preference of a dopant in the GB can lead to strengthening effects that deviate from those predicted using simple bond-breaking arguments. Assuming a fast cleavage model of fracture, Ta, Re, Os and W are predicted to have a weak strengthening effect on Mo for the Σ5(310) tilt GB, and Mn, Fe, Co and Nb are predicted to have reasonable strengthening effects for the Σ5(100) twist GB.

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The liquid phase sintering of molybdenum with Ni and Cu additions

Cited by 31 publications

References 9 publications

Biphasic calcium phosphate nanocomposite porous scaffolds for load-bearing bone tissue engineering

Biphasic calcium phosphate nanocomposite porous scaffolds for load-bearing bone tissue engineering

Enhancement of liquid phase sintering through Al–Si additions to Al–Cu systems

Computational study of metallic dopant segregation and embrittlement at molybdenum grain boundaries

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