May 01, 2008 the spark plasma sintering process offers significant improvements over conventional hot press and hot isostatic press sintering. Spark plasma sintering sps is a newly developed process a synthesis and processing technique which makes it possible for sintering and sinterbonding at low temperatures and short periods by charging the intervals between powder particles with electrical energy and effectively applying a high temperature spark plasma which is generated momentarily. The influence of sintering temperature, heating rate, direct current pulse pattern, sintering time, and sintering pressure on the final density and grain size of the product was investigated. Spark plasma sintering of fuel cermets for nuclear reactor applications yang zhong1, 2, robert c. Pdf spark plasma sintering of fine alphasilicon nitride. Sps is a newly developed rapid sintering technique with a great potential for achieving fast densification results with minimal grain growth in a short sintering time. The spark plasma sintering furnace sps is one of the most advanced sintering furnace. The spark plasma sintering process has been shown to be an effective technique for consolidating metallic materials including nanocomposites. Some fundamentals on spark plasma sintering as a processing.
Spark plasma sintering sps is a highspeed powder consolidation sintering technology capable of processing conductive and nonconductive materials. In the present study spark plasma sintering sps technique is used to synthesis of particulate ceramic matrix composites cmcs. Spark plasma sintering sps is one of the most advanced techniques for consider ation of highly refractory powders, and induced by applying uniaxial force and a pulsed direct current to execute quick sintering of powder or green compact. This book describes spark plasma sintering sps in depth. While the term spark plasma sintering is commonly used, the term is misleading since neither a spark nor a plasma is present in the process. The effect of electric field and pressure on the synthesis. This newly developed technique is regarded as an energysaving technology due to its short process time and few. Spark plasma sintering sps is a highspeed powder consolidationsintering technology capable of processing conductive and nonconductive materials. The idea of flash spark plasma sintering or flash hot pressing fhp stems from the. The influence of sintering temperature, heating rate, direct current pulse pattern, sintering time, and sintering pressure on the. Spark plasma sintering sps is a novel technique that uses pressuredriven powder consolidation in which a pulsed direct electric current passes through a. The fundamental concepts of sintering process process description of spark plasma sintering.
Spark plasma sintering of fuel cermets for nuclear reactor. Historically, sps was developed in search of ways to preserve a finegrained structure of the. Introduction spark plasma sinteling sps is a newly developed processa synthesis and processing techniquewhich makes possible sintering and sinterbonding at low temperatures and short periods by charging the intervals between powder particles with electrical energy and effectively applying a high temperature spark plasnla generated. Its processing parameters are usually lowvoltage and lowpressure acting, using a uniaxial. Apr 19, 2017 spark plasma sintering sps is one of the state of the art techniques for the facile consolidation of virtually all ceramic and metallic powders 1,2,3,4,5.
The spark plasma sintering process offers significant improvements over conventional hot press and hot isostatic press sintering. Simultaneous spark plasma sintering of multiple complex. A new ultrarapid process of flash spark plasma sintering is developed. Spark plasma sintering sps is one of the state of the art techniques for the facile consolidation of virtually all ceramic and metallic powders 1,2,3,4,5. Spark plasma sintering advanced ceramics and powder. Spark plasma sintering can be viewed as an evolution of other methods, such as hot pressing or electrical resistance sintering, or a combination of many methods. A short overview of works on spark plasma sintering sps is given in the present paper.
Spark plasma sintering sps or pulsed electric current sintering pecs is a sintering techni. This method, as it is known today, has been developed in the last few decades under different names, such as plasma assisted. We discovered that a small amount of dopants can lower the starting temperature of densification during spark plasma sintering sps. Spark plasma sintering sintering is the process of making objects from powder, by heating the material in a furnace below its melting point so that bonding takes place by diffusion of atoms. Many space systems such as satellite mirrors and their supporting structures require to be made from very lowthermal expansion materials combining both high hydrostability and relatively high mechanical properties. Mechanism of spark plasma sintering sintering building. Viscous and diffusion mechanisms of mass transport 3. The load commonly up to 15000 psi100 mpa is transferred to the powder through the upper punch. Oct 31, 2017 while the term spark plasma sintering is commonly used, the term is misleading since neither a spark nor a plasma is present in the process.
The sintering of nanosize powders of fully stabilized zirconia was investigated using the spark plasma sintering sps method. Spark plasma sintering of materials advances in processing. Furthermore the spark discharge could activate the particles to improve densification 12. Comparative evaluation of spark plasma sps, microwave. Dec 11, 2014 various sintering techniques are used, e. Applications of spark plasma sintering takashi goto fl hhk imr, tohoku university institute for materials researc h, tohoku university, japan 2nd international schoolseminar perspective technology of materials consolidation with electromagnetic fields 1st russiajapan sps workshop moscow, russia, may 2022, 20 outline introduction. Spark plasma sintering sps is a novel technique that uses pressuredriven powder consolidation in which a pulsed direct electric current passes through a sample compressed in a graphite matrix. Fabrication of porous materials by spark plasma sintering. The advantages of spark plasma sintering such as high heating rates, short sintering cycles, and low sintering temperatures that allow sintering nanostructured materials were emphasized by all researchers. Spark plasma sintering sps is performed in a graphite. Spark plasma sintering preparation of reference targets for. Spark plasma sintering and densification mechanisms of.
We have tested the effect of sps on different international standards that are available in the form of minerals and rocks powders. Since only surface layers of the powder particles are heated in the spark plasma sintering process, the average monitored temperature of the compact is relatively low. The model 104 spark plasma sintering sps system from thermal technology llc introduces a revolutionary highspeed powder consolidation process. Sps is a type of hot pressing method and in this method, the rate of heating is from 100c to c per minute with high densification. Spark plasma sintering sps, a sintering method that uses the action of pulsed direct current and pressure, has received a lot of. A systematic study of various spark plasma sintering sps parameters, namely temperature, holding time, heating rate, pressure, and pulse sequence, was conducted to investigate their effect on the densification, graingrowth kinetics, hardness, and. Spark plasma sintering seminar sintering plasma physics. Some fundamentals on spark plasma sintering as a processing tool to fabricate biomaterials bikramjit basu department of materials science and engineering. Pdf spark plasma sintering of alumina mats johnsson. Microstructure evolution during spark plasma sintering of fjs. The method has been used extensively over the past decade with results showing clear benefits over conventional methods.
A wide variety of spark plasma sintering options are available to you, there are 147 suppliers who sells spark plasma sintering on, mainly located in asia. Spark plasma sintering advanced ceramics and powder metallurgy. Figure 18 37 can be used to compare the microstructure of an intermetallic alloy. Extrapolation of sintering concepts towards constitutive modeling of sps 6. With characteristics of fast sintering and high density of specimen, this furnace is mainly applied to sintering of nanophase materials, functionally graded material fgm, nanoscale thermoelectric materials, rare earth permanent magnets, target materials, nonequilibrium materials and medical implants, etc. Comparative evaluation of spark plasma sps, microwave mws. The pulsed dc power supply is connected to the upper and lower punches.
Flash ultrarapid sparkplasma sintering of silicon carbide. Spark plasma sintering seminar free download as powerpoint presentation. We conducted studies on yb 22 c 2 n spark plasma sintered with additions of yb 4 and yb 25 c, including the investigations of the densification process and the thermoelectric properties of the material. In the last two decades, sps has emerged as an interesting consolidation approach given its reported ability to densify metal and ceramic powders fully in a short time interval, thereby helping retain the starting microstructure. The idea of flash spark plasma sintering or flash hot pressing fhp stems from the conducted theoretical analysis of the. Gaffet and others published spark plasma sintering find, read and cite all the research you need on researchgate. Spark plasma sintering was applied to compact the zns powder, and the resulting ceramic was analyzed by scanning electron microscopy, fouriertransform infrared spectroscopy, raman spectroscopy. Spark plasma sintering problem statement spark plasma sintering sps, also known as pulsed electric current sintering pecs or field assisted sintering technology fast, employs a pulsed dc current to heat up an electrically conductive tool and possibly powder compact by joule heating. The book highlights methods used to consolidate metallic or ceramic particles in very short times.
Spark plasma sintering is one of the processing routes to process biomaterials in laboratory. It addresses fundamentals and materialspecific considerations, techniques, and applications across a broad spectrum of materials, and emphasizes optimization of speed, mechanical and wear properties, and energy efficiency. Sep 20, 2019 a spark plasma sintering sps process has been explored to densify fjs. Sps normally consists of 4 main stages, gas removal and vacuum, application of pressure, resistance heating. This work addresses the two great challenges of the spark plasma sintering sps process. Nanostructured ti consolidated via spark plasma sintering. Spark plasma sintering sps has the potential to obtain fully dense materials at low temperature and with a rapid sintering rate, which can prevent the formation of deleterious intermediate phases and reduce the evaporation of sno 2. Spark plasma sintering simultaneously applies pulsed electrical current and pressure directly on the sample leading to densification at relatively lower temperatures and short retention times.
Spark plasma sintering sps, a sintering method that uses the action of pulsed direct current and pressure, has received a lot of attention due to its capability of exerting control over the microstructure of the sintered material and flexibility in terms of the heating rate and heating mode. A systematic study of various spark plasma sintering sps parameters, namely temperature, holding time, heating rate, pressure, and pulse sequence, was conducted to investigate their effect on. The use of an electrical current as a means of activating the sintering process was recognized in 1933 28. Sep 14, 2016 a new ultrarapid process of flash spark plasma sintering is developed. A spark plasma sintering sps process has been explored to densify fjs. The effect of sps conditions, such as temperature and p. Spark plasma sintering sps or pulsed electric current sintering pecs is a sintering technique utilizing uniaxial force and a pulsed onoff direct electrical current dc under low atmospheric pressure to perform high speed consolidation of the powder. The top countries of supplier is china, from which the percentage of spark plasma sintering supply is 100% respectively. Spark plasma sintering as advanced pm sintering method. Nercf spark plasma sintering system college of engineering. Challenges and opportunities for spark plasma sintering.
The sps technique enables an increased sintering kinetics of a broad group of materials. Spark plasma sintering is a relatively new technique which mainly represents a big advantage in the extremely small amount of time required to complete the process. Overall structure of slide presentation fundamentals fundamentals of sintering as a process to consolidate powders spark plasma sintering. This theory is based on electrical discharge and generation of plasma spark with high temperature within a fraction of a second, which forms. Application of spark plasma sintering for manufacturing of. Thermoelectric properties and spark plasma sintering of doped. Pdf spark plasma sintering of alumina zhe zhao academia. The name spark plasma sintering is the most used denomination among a total of 60 found in the literature.
Spark plasma sintering sps is a short time consolidation technique, which enables rapid sintering and synthesis of various materials metals, ceramics and composites applying dc current pulses with several hundred or thousand ampere while mechanical pressure is applied. Spark plasma sintering an overview sciencedirect topics. Jerred, kristopher schwinn, laura sudderth 1 and joshua hundley 1center for space nuclear research, idaho national laboratory, id 83415, u. It addresses fundamentals and materialspecific considerations, techniques, and applications across a broad spectrum of materials.
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