Electrically Conductive Composite Powders and Compounds Produced with Solid State Synthesis

Karttunen, Mikko; Ruuskanen, Pekka; Enqvist, Jouni

doi:10.1081/amp-200060380

Cited by 5 publications

(2 citation statements)

References 4 publications

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“…These could lead to a better dispersion of powders [32]. During this period, the residual gas in the cavity was driven out when the temperature rose up to 400 • C, and the loose powders were rearranged and compressed tightly, as shown in Fig.…”

Section: Sintering Processmentioning

confidence: 99%

“…Because the resistance of the liquid phase is larger than the solid phase, a large ac current will not continue to pass through the liquid areas but may change to another path. Meanwhile, the liquid phase would lead to filling of the vicinal pores due to the viscous flow and capillary force under the pressure applied, which would promote disappearance of the interfaces between particles and fast densification of the compact [32]. The liquid phase generally solidifies rapidly because of the heat conduction to the adjacent solid particles.…”

Section: Effect Of the Coupled Multiphysics Fieldsmentioning

confidence: 99%

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Forming Microgears by Micro-FAST Technology

Yang

Qin

et al. 2013

J. Microelectromech. Syst.

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The use of microcomponents as well as intensive competition on manufacturing cost led to the requirement for cost-effective production of those components without much compromise on their final quality. To address this issue, a novel microforming technology, named as micro-field-activated sintering technology (Micro-FAST), was introduced for the fabrication of microcomponents, in which loose powders were pressed and sintered to form microgears via electroheating loop sintering and microforming. The whole process was realized in a Gleeble-1500D thermal simulation machine. A relative density of 98.7% was achieved after sintering microgears with eight teeth on it and 1.6 mm pitch diameter at 600 • C, heating rate of 50 • C/s, pressure of 100 MPa, and electroheating loop of five times. Being different from a conventional FAST process, the Micro-FAST process is of different characteristics largely due to the size effect. Effects of the external electric field, thermal field, and pressure field on the Micro-FAST densification process were analyzed. It was revealed that the deformation of the particles and fusion at the contact interfaces between particles are two important parameters to the densification of the green body and, hence, to the quality of the final component.[ 2012-0294]Index Terms-Copper, field-activated sintering technique (FAST), micro-field-activated sintering technology (Micro-FAST), microgears, powders.

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Section: Sintering Processmentioning

confidence: 99%

Section: Effect Of the Coupled Multiphysics Fieldsmentioning

confidence: 99%