Mechanical alloying of niobium aluminade

Tracy, M.J.; Groza, Joanna R.

doi:10.1016/0026-0657(92)90949-f

Cited by 1 publication

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“…One of the electrical consolidation modalities is the so-called Electrical Resistance Sintering (ERS) in which the powder densifies by the combined effect of pressure and heat released in the powder due to the Joule effect caused by the high intensity current that passes through it. Previous works have been carried out on ERS process, in order to identify the main process variables and to determine the optimum values of processing parameters, such as compression pressure, current intensity or heating time [5][6][7][8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Medium-Frequency Electrical Resistance Sintering of Highly Oxidized Iron Powder

Astacio

Fernández

Caballero

et al. 2018

KEM

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Highly oxidized iron powders were consolidated by means of the medium-frequency electrical resistance sintering technique (MF-ERS). In order to activate the powders and to disperse the oxides coating the particles, prior to the consolidation process, powders were milled in a high-energy mill for 7 minutes. Structural and mechanical characterisations of electrically consolidated compacts were carried out in order to study the effect of two main processing parameters (current intensity and heating time). The compact properties resulted to be very sensitive to these parameters, especially to the current intensity. A change from 5 kA to 10 kA in the current intensity makes the porosity to fall from 30% to 8%. Moreover, using a higher current intensity (10 kA) increases the mechanical properties of the final compacts: micro-hardness change in almost 50 HV, up to 104 HV 1, and compression resistance by around 500 MPa, up to 569 MPa.

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