A method of investigating the electric-contact sintering of powder materials

Hermel, W.; Siegel, Sharon Crane; Oshkaderov, S. P.; Andrushchik, L. O.; Shvitai, V. A.; YAREMCHUK, V. V.

doi:10.1007/bf00843009

Cited by 9 publications

(9 citation statements)

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“…Dresvyannikov, Kolpakov, Doronin and other researchers of Kazan State Technical University conducted studies on spark plasma sintering [ 21 , 23 , 74 , 75 , 76 , 77 , 78 , 79 ]. Scientists from Kurdyumov Institute of Metal Physics, National Academy of Sciences of Ukraine have also made contributions to the development of this area (Andrushchik, Balakshina, Oshkaderov, Severyanina and others) [ 80 , 81 , 82 , 83 , 84 , 85 , 86 ].…”

Section: Methods Of Electric Current-assisted Consolidation Of Powmentioning

confidence: 99%

“…In 1985, Hermel et al [ 83 ], Andrushchik et al [ 84 , 85 ] conducted research on electric contact sintering of iron powders. The method uses electric current (alternating or direct) that passes directly through the sample, which can be 50–150 mm long and can have a cross-section of 50 mm 2 .…”

Section: Methods Of Electric Current-assisted Consolidation Of Powmentioning

confidence: 99%

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Outside Mainstream Electronic Databases: Review of Studies Conducted in the USSR and Post-Soviet Countries on Electric Current-Assisted Consolidation of Powder Materials

et al. 2013

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This paper reviews research articles published in the former USSR and post-soviet countries on the consolidation of powder materials using electric current that passes through the powder sample and/or a conductive die-punch set-up. Having been published in Russian, many of the reviewed papers are not included in the mainstream electronic databases of the scientific articles and thus are not known to the scientific community. The present review is aimed at filling this information gap. In the paper, the electric current-assisted sintering techniques based on high- and low-voltage approaches are presented. The main results of the theoretical modeling of the processes of electromagnetic field-assisted consolidation of powder materials are discussed. Sintering experiments and related equipment are described and the major experimental results are analyzed. Sintering conditions required to achieve the desired properties of the sintered materials are provided for selected material systems. Tooling materials used in the electric current-assisted consolidation set-ups are also described.

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Section: Methods Of Electric Current-assisted Consolidation Of Powmentioning

confidence: 99%

Section: Methods Of Electric Current-assisted Consolidation Of Powmentioning

confidence: 99%

Outside Mainstream Electronic Databases: Review of Studies Conducted in the USSR and Post-Soviet Countries on Electric Current-Assisted Consolidation of Powder Materials

et al. 2013

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“…According to this at E = 0 Eqs. (14) and (18) describe the process of coagulation of small pores into large ones. In a general case from Eq.…”

Section: Final Stages Of Bulk Heating Sinteringmentioning

confidence: 99%

“…Eq. (14) shows that the rates of diffusional processes are determined essentially by the differences in formation enthalpies of vacancies on different types of sources (sinks) and by mean free paths of excess vacancies in respect to different ensembles of sources (sinks), (Dτ i ) 1/2 . The greater the number of sources (sinks), present in a crystal, the smaller the mean free path of an excess vacancy and the higher the rate of diffusional processes [11].…”

Section: The Role Of the Mobile And Immobile Dislocationsmentioning

confidence: 99%

Phenomenological Theory of Sintering and its Application to Swelling

Kornyushin¹

2006

Advances in Science and Technology

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The General Phenomenological Theory of Sintering, formulated by the author in 1998 is applied to the problem of swelling. Driving forces, caused by the presence of the evolution of heat in the volume of a sample (electric contact, hf, inductive heating or penetrating radiation, e.g., neutrons could be the sources of the heat in the bulk of a sample) are considered. The influence of these driving forces on sintering, structure and properties is discussed. The role of mobile and immobile dislocations, grain boundaries, and pores is considered. Cycling and pulsing regimes of sintering are investigated.

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“…In this regard, we should recall the efforts of Andrushchik and his colleagues [10][11][12][13] who successfully used high-speed dilatometry to analyze the evolution of porous structures. They examined mass transfer during heating by passing a current through powder iron and established that the process took several stages to occur.…”

Section: Introductionmentioning

confidence: 99%