The Electrical Discharge Compaction of Powder: Mechanics and Material Structure

The response of metal powders contained in columnar form to high voltage electrical discharge between its ends is described in terms of the electrical, physical, morphological, and compositional characteristics of the powder. The process is viewed as one involving oxide film breakdown, interparticle neck formation, and consolidation. The mechanics, structures, and industrial applications of the process are discussed.

Download Full-text

Neck Formation and Growth in High-Voltage Discharge Forming of Metal Powders

Powder Metallurgy ◽

10.1179/pom.1982.25.2.85 ◽

1982 ◽

Vol 25 (2) ◽

pp. 85-89 ◽

Cited By ~ 12

Author(s):

D. J. Williams ◽

W. Johnson

Keyword(s):

High Voltage ◽

Metal Powders ◽

Neck Formation ◽

High Voltage Discharge

Download Full-text

Variation in the particle size of FE–TI–B4C powders induced by high-voltage electrical discharge

Powder Metallurgy and Metal Ceramics ◽

10.1007/s11106-012-9407-4 ◽

2012 ◽

Vol 51 (3-4) ◽

pp. 129-136 ◽

Cited By ~ 4

Author(s):

O. N. Sizonenko ◽

G. A. Baglyuk ◽

A. I. Raichenko ◽

É. I. Taftai ◽

E. V. Lipyan ◽

...

Keyword(s):

Particle Size ◽

High Voltage ◽

Electrical Discharge

Download Full-text

Electron Multiplication Processes in High‐Voltage Electrical Discharge in Vacuum

Journal of Applied Physics ◽

10.1063/1.1722627 ◽

1957 ◽

Vol 28 (11) ◽

pp. 1251-1253 ◽

Cited By ~ 9

Author(s):

A. I. Bennett

Keyword(s):

High Voltage ◽

Electrical Discharge ◽

Electron Multiplication

Download Full-text

Machining Feasibility of a New Developed Medium in Electrical Discharge Machining

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.656-657.335 ◽

2015 ◽

Vol 656-657 ◽

pp. 335-340 ◽

Cited By ~ 1

Author(s):

Fang Pin Chuang ◽

Yan Cherng Lin ◽

Hsin Min Lee ◽

Han Ming Chow ◽

A. Cheng Wang

Keyword(s):

Electrical Discharge ◽

Material Removal ◽

Electrical Discharge Machining ◽

Removal Rate ◽

Environmentally Friendly ◽

Industrial Applications ◽

Deionized Water ◽

Machining Parameters ◽

Machining Performance ◽

Machining Characteristics

The environment issue and green machining technique have been induced intensive attention in recent years. It is urgently need to develop a new kind dielectric to meet the requirements for industrial applications. The aim of this study is to develop a novel dielectric using gas media immersed in deionized water for electrical discharge machining (EDM). The developed machining medium for EDM can fulfill the environmentally friendly issue and satisfy the demand of high machining performance. The experiments were conducted by this developed medium to investigate the effects of machining parameters on machining characteristics in terms of material removal rate (MRR) and surface roughness. The developed EDM medium revealed the potential to obtain a stabilizing progress with excellent machining performance and environmentally friendly feature.

Download Full-text

ANALYSIS OF EXISTING METHODS FOR URANIUM-PLUTONIUM MIXED NITRIDE FUEL FAB-RICATION IN RUSSIA AND ABROAD

IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENIY KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA ◽

10.6060/ivkkt.20206306.6185 ◽

2020 ◽

Vol 63 (6) ◽

pp. 12-18

Author(s):

Maxim S. Fedorov ◽

Nikolay A. Baydakov ◽

Alexander N. Zhiganov ◽

Dmitry V. Zozulya

Keyword(s):

High Voltage ◽

Electric Pulse ◽

Industrial Applications ◽

Ceramic Technology ◽

Laboratory Methods ◽

Advantages And Disadvantages ◽

Nitride Fuel ◽

Powder Pressing ◽

Uranium Nitride ◽

Uranium Plutonium

This paper presents a review and a brief analysis of existing methods for producing mixed uranium nitride and plutonium, developed by both Russian and foreign scientists. The main parameters of the processes are considered, and their advantages and disadvantages are studied. Currently, the main areas of nitride fuel production are the metal hydride method and carbothermic reduction from the starting oxides. The methods are traditional ceramic technology. The starting products for the manufacture of nitride fuel powder can be either oxides (uranium dioxide and plutonium dioxide) or metals (uranium, plutonium and their alloys). To date, the technology for the manufacture of nitride fuel powder has not been finally selected. When considering existing methods, significant emphasis was placed on industrial applications and the simplicity of the hardware design processes. The laboratory methods are reflected in the work, which make it possible to simplify the process and reduce the costs of obtaining powders of mixed uranium and plutonium nitrides. However, they have significant difficulties in the technological implementation and low productivity of the processes. Of special interest among laboratory methods for producing mixed uranium and plutonium nitrides is the method of high-voltage electric pulse consolidation. This method allows sintering of tablets at the stage of powder pressing from mixed uranium and plutonium nitrides by passing a short high-voltage discharge with a power of several kW directly through the powder.

Download Full-text