Pub Date : 2000-06-27DOI: 10.1109/KORUS.2000.865947
E.A. Krasnokutskaja, A.S. D'jakova, Ki-Whan Chi
There are some effective reagents on the base of DMSO for oxidation of alkenes and alkynes to corresponding lJ-diketones: cg HBr/DMSO, IJDMSO, PdClJDMSO. On the othe; hand obscure general methods for a selective oxidation of alkane's chain to proper polycarbonyl functions R(CH2)nR + R(C0)nR As part of a synthetic strategy for this transformation we have developed a new method for onepot oxidation of acenaphthene to acenaphthenequionone. The method involve the following reactions: a) bromination of acenaphthene to 1-bromoacenaphthene; b) oxidation of bromoacenaphthene to acenaphthenequionone by heating into DMSO. Overall yield of acenaphthenequionone is 79%. We have shown also that this approach has a general importance as since 1-bromophenyletane easily oxidized to phenylglyoxal by heating in DMSO with good yield too.
{"title":"Convenient one-pot oxidation of acenaphthene to acenaphthenequinone by DMSO","authors":"E.A. Krasnokutskaja, A.S. D'jakova, Ki-Whan Chi","doi":"10.1109/KORUS.2000.865947","DOIUrl":"https://doi.org/10.1109/KORUS.2000.865947","url":null,"abstract":"There are some effective reagents on the base of DMSO for oxidation of alkenes and alkynes to corresponding lJ-diketones: cg HBr/DMSO, IJDMSO, PdClJDMSO. On the othe; hand obscure general methods for a selective oxidation of alkane's chain to proper polycarbonyl functions R(CH2)nR + R(C0)nR As part of a synthetic strategy for this transformation we have developed a new method for onepot oxidation of acenaphthene to acenaphthenequionone. The method involve the following reactions: a) bromination of acenaphthene to 1-bromoacenaphthene; b) oxidation of bromoacenaphthene to acenaphthenequionone by heating into DMSO. Overall yield of acenaphthenequionone is 79%. We have shown also that this approach has a general importance as since 1-bromophenyletane easily oxidized to phenylglyoxal by heating in DMSO with good yield too.","PeriodicalId":20531,"journal":{"name":"Proceedings KORUS 2000. The 4th Korea-Russia International Symposium On Science and Technology","volume":"83 1","pages":"182-185"},"PeriodicalIF":0.0,"publicationDate":"2000-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83788436","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2000-06-27DOI: 10.1109/KORUS.2000.865934
E. A. Makarov, A. Sychev
A computer simulation of the effect of overflow of electrons between conduction band minima of n-type silicon is carried out. On the basis of the numerical solution of the equation, the neutrality association of Fermi level position and electron concentration in minima are obtained at major monoaxial strain. The obtained results can be used for simulation of charge carrier transport in strained layers of Ge/sub x/Si/sub 1-x/ alloys.
{"title":"Intervalley overflow of electrons in heavily doped silicon","authors":"E. A. Makarov, A. Sychev","doi":"10.1109/KORUS.2000.865934","DOIUrl":"https://doi.org/10.1109/KORUS.2000.865934","url":null,"abstract":"A computer simulation of the effect of overflow of electrons between conduction band minima of n-type silicon is carried out. On the basis of the numerical solution of the equation, the neutrality association of Fermi level position and electron concentration in minima are obtained at major monoaxial strain. The obtained results can be used for simulation of charge carrier transport in strained layers of Ge/sub x/Si/sub 1-x/ alloys.","PeriodicalId":20531,"journal":{"name":"Proceedings KORUS 2000. The 4th Korea-Russia International Symposium On Science and Technology","volume":"3 1","pages":"117-122"},"PeriodicalIF":0.0,"publicationDate":"2000-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90382895","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2000-06-27DOI: 10.1109/KORUS.2000.866060
Jong-Hwan Choi, Jin-Kul Lee, Soon-yong Yang, Sung-Tae Park
Anti-lock braking system (ABS) in the passenger car is a safety device, which adds hydraulic system to the existing brake system to prevent wheel from locking, so we can obtain maximum braking force on driving. Each channel to control braking pressure in the hydraulic system consists of sol-flow type using solenoid valve and flow control valve or sol-sol type using two solenoid valve. In this paper, the channel is composed of one solenoid valve with high responsibility and 1/4 vehicle model is used. The parameters relative to braking force are friction coefficient between wheel and road surface and vehicle weight. On driving, it is impossible to directly measure friction coefficient and friction coefficient changes in some boundary in condition of the road surface. Also vehicle weight becomes different in terms of load. Consequently, robust controller is designed to maintain braking force at maximum even in the presence of parameter variation in some boundary.
{"title":"A robust controller for maximizing braking force despite of the parameter variation","authors":"Jong-Hwan Choi, Jin-Kul Lee, Soon-yong Yang, Sung-Tae Park","doi":"10.1109/KORUS.2000.866060","DOIUrl":"https://doi.org/10.1109/KORUS.2000.866060","url":null,"abstract":"Anti-lock braking system (ABS) in the passenger car is a safety device, which adds hydraulic system to the existing brake system to prevent wheel from locking, so we can obtain maximum braking force on driving. Each channel to control braking pressure in the hydraulic system consists of sol-flow type using solenoid valve and flow control valve or sol-sol type using two solenoid valve. In this paper, the channel is composed of one solenoid valve with high responsibility and 1/4 vehicle model is used. The parameters relative to braking force are friction coefficient between wheel and road surface and vehicle weight. On driving, it is impossible to directly measure friction coefficient and friction coefficient changes in some boundary in condition of the road surface. Also vehicle weight becomes different in terms of load. Consequently, robust controller is designed to maintain braking force at maximum even in the presence of parameter variation in some boundary.","PeriodicalId":20531,"journal":{"name":"Proceedings KORUS 2000. The 4th Korea-Russia International Symposium On Science and Technology","volume":"37 1","pages":"61-65 vol. 3"},"PeriodicalIF":0.0,"publicationDate":"2000-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77038551","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2000-06-27DOI: 10.1109/KORUS.2000.865960
Byeong-Kyu Lee
Volatile Organic Compounds (VOCs) could be precursors of atmospheric ozone and photochemical smog formation. In particular, chemical plants have produced a lot of VOCs and they have been forced to reduce or remove air emissions at on-site chemical facilities. For effective removal of VOCs produced in the chemical plants, the author employed a titanium oxide (noz) mediated photo catalytic oxidation method. It is required to initiate oxygen radicals for the photo catalytic oxidation of VOCs. The initiation methods employed in this study were Ultra-Violet (UV), Non-Thermal Plasma (NTP), and a combination of UV and NTP techniques. This study focused a comparison of the removal efficiencies of VOCs as a function of the initiation method such as NTP and/or UV techniques. Removal efficiency change of VOCs was investigated as a function of the wavelength of the UV lamp (254nm, 302nm, and 365nm) and the degree of TiOz coating (10% and 30%). In general, the removal efficiency by NTP technique was much better than the UV or the combination of UV and NTP techniques. In a capar i son of UV wavelengths employed, it is also realized that the shorter wavelength showed the better removal efficiency as compared with longer ones. In a comparison of removal efficiencies of VOCs according to the degree of TiOz coating, the higher TiOz coating showed the better removal efficiency than the lower TiOz coating. .
{"title":"A pilot study of volatile organic compound removal by photo catalytic oxidation","authors":"Byeong-Kyu Lee","doi":"10.1109/KORUS.2000.865960","DOIUrl":"https://doi.org/10.1109/KORUS.2000.865960","url":null,"abstract":"Volatile Organic Compounds (VOCs) could be precursors of atmospheric ozone and photochemical smog formation. In particular, chemical plants have produced a lot of VOCs and they have been forced to reduce or remove air emissions at on-site chemical facilities. For effective removal of VOCs produced in the chemical plants, the author employed a titanium oxide (noz) mediated photo catalytic oxidation method. It is required to initiate oxygen radicals for the photo catalytic oxidation of VOCs. The initiation methods employed in this study were Ultra-Violet (UV), Non-Thermal Plasma (NTP), and a combination of UV and NTP techniques. This study focused a comparison of the removal efficiencies of VOCs as a function of the initiation method such as NTP and/or UV techniques. Removal efficiency change of VOCs was investigated as a function of the wavelength of the UV lamp (254nm, 302nm, and 365nm) and the degree of TiOz coating (10% and 30%). In general, the removal efficiency by NTP technique was much better than the UV or the combination of UV and NTP techniques. In a capar i son of UV wavelengths employed, it is also realized that the shorter wavelength showed the better removal efficiency as compared with longer ones. In a comparison of removal efficiencies of VOCs according to the degree of TiOz coating, the higher TiOz coating showed the better removal efficiency than the lower TiOz coating. .","PeriodicalId":20531,"journal":{"name":"Proceedings KORUS 2000. The 4th Korea-Russia International Symposium On Science and Technology","volume":"39 1","pages":"239-247"},"PeriodicalIF":0.0,"publicationDate":"2000-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80354101","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2000-06-27DOI: 10.1109/KORUS.2000.866124
S. Boev, K. Mikheev
The nondestructive method of electric field probing and polarization in solid dielectrics with acoustic pressure pulses has great possibilities and prospects in investigating the processes and mechanisms of charge transport and slow component of relaxation polarization, which is not displayed by measuring relative dielectric constant at alternating voltage. The experimental procedure and methods of processing the experimental results are being constantly improved. In this case the main problem is the separation of contributions made to the measured signal by space charge and polarization. The most informative way to realize this method is based on the reverse piezoelectric effect, which allows to register fast-running processes of changing the space charge and polarization with a resolution of tens of micrometers. The criteria elaborated allow to estimate the contribution of charge and polarization to the measured signal when probing polar and non-polar dielectrics. The results of the analysis have shown that probing the space charge allows to estimate the value of effective mobility for electrons and holes, and their field dependence, to determine the real value of specific volume electrical conductivity, to determine the contribution of excess and normal charge carriers to the processes of electric transport, and to test the condition of the electrode-sample contact of a dielectric.
{"title":"Method of solid dielectrics acoustic probing and its capabilities","authors":"S. Boev, K. Mikheev","doi":"10.1109/KORUS.2000.866124","DOIUrl":"https://doi.org/10.1109/KORUS.2000.866124","url":null,"abstract":"The nondestructive method of electric field probing and polarization in solid dielectrics with acoustic pressure pulses has great possibilities and prospects in investigating the processes and mechanisms of charge transport and slow component of relaxation polarization, which is not displayed by measuring relative dielectric constant at alternating voltage. The experimental procedure and methods of processing the experimental results are being constantly improved. In this case the main problem is the separation of contributions made to the measured signal by space charge and polarization. The most informative way to realize this method is based on the reverse piezoelectric effect, which allows to register fast-running processes of changing the space charge and polarization with a resolution of tens of micrometers. The criteria elaborated allow to estimate the contribution of charge and polarization to the measured signal when probing polar and non-polar dielectrics. The results of the analysis have shown that probing the space charge allows to estimate the value of effective mobility for electrons and holes, and their field dependence, to determine the real value of specific volume electrical conductivity, to determine the contribution of excess and normal charge carriers to the processes of electric transport, and to test the condition of the electrode-sample contact of a dielectric.","PeriodicalId":20531,"journal":{"name":"Proceedings KORUS 2000. The 4th Korea-Russia International Symposium On Science and Technology","volume":"23 1","pages":"411-415 vol. 3"},"PeriodicalIF":0.0,"publicationDate":"2000-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83235238","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2000-06-27DOI: 10.1109/KORUS.2000.866013
S.V. Korotikov
The paper is dedicated to problems and features of optimal design of the distributed information systems (DIS) for payphones network control. The principal architectures of possible building similar DIS, their main advantages and disadvantages are considered. The problems of workflow, allocation of the data and path of their solution of these problems are described. The example of real designed DIS for payphone network control is given.
{"title":"Optimal building of distributed information system for payphones control","authors":"S.V. Korotikov","doi":"10.1109/KORUS.2000.866013","DOIUrl":"https://doi.org/10.1109/KORUS.2000.866013","url":null,"abstract":"The paper is dedicated to problems and features of optimal design of the distributed information systems (DIS) for payphones network control. The principal architectures of possible building similar DIS, their main advantages and disadvantages are considered. The problems of workflow, allocation of the data and path of their solution of these problems are described. The example of real designed DIS for payphone network control is given.","PeriodicalId":20531,"journal":{"name":"Proceedings KORUS 2000. The 4th Korea-Russia International Symposium On Science and Technology","volume":"32 1","pages":"150-155 vol. 2"},"PeriodicalIF":0.0,"publicationDate":"2000-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82924070","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2000-06-27DOI: 10.1109/KORUS.2000.865946
K. Yoo, S. Woo
{"title":"Preparation of PANI/3-ABSA/GC modified electrodes and their reduction behaviour to Cu(II)","authors":"K. Yoo, S. Woo","doi":"10.1109/KORUS.2000.865946","DOIUrl":"https://doi.org/10.1109/KORUS.2000.865946","url":null,"abstract":"","PeriodicalId":20531,"journal":{"name":"Proceedings KORUS 2000. The 4th Korea-Russia International Symposium On Science and Technology","volume":"434 1","pages":"176-181"},"PeriodicalIF":0.0,"publicationDate":"2000-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83604877","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2000-06-27DOI: 10.1109/KORUS.2000.865944
Ki-Whan Chi, G. G. Furin
Fluoroorganic compounds have attracted a great deal of interest due to their peculiar physical and biological properties. Accordingly, development of a synthetic method for the preparation of fluoroorganic compounds with typical characteristics has become an important issue in fluoroorganic chemistry.’ Perfluorinated trialkylamines and dialkyl ethers have been particularly focused on since they are characterized not only by low freezing points, high volatility, improved electrophysical and thermophysical characteristics but also by an excellent lubricating property .’ Moreover, some of perfluorinated organic compounds are also useful as an oxygen-canying liquid in biology and medi~ine.~ These fluoroogranic compounds have been prepared from hydrocarbon precursors either by electrochemical fluorination4 or by direct fluorinationS with Fz. Unfortunately, those synthetic methodologies provide only low yields of the desired products due to the occurrence of destructive products. On the other hand, fluorination with other chemicals usually requires hazardous and/or expensive fluorinating reagents. It is noteworthy, however, that perfluorination of partly-fluorinated starting materials gives better yields of the desired products because of the lower degree of the destruction process and the easiness of control of fl~orination.~” Moreover, several by-products obtained from polymerization of tetrafluoroethylene or hexafluoroepoxypropylene can be used as starting materials in the synthesis of more complex partly-fluorinated organic compounds,* For example, a,a,o-trihydroperfluorinated alcohols, H(CF2CF2),CH20H, n = 1-4, which are the by-products in the synthesis of polytetrafluoroethylene might be a good and cheap starting material for the synthesis of partly-fluorinated organic compound^.^^'^^^^ The fluorinated alcohols .have been applied to the reaction with 2,3,4,5,6-pentafluorostyreneMaH’2, decafluoroazobenzene/CsF l 3 or decafluoro-mdimethylbenzene/NaOH 4. In this paper we would like to publish a simple and convenient method for the synthesis of partlyfluorinated alkyl aryl ethers by using a polyfluorobenzene derivative (octafluorotoluene (1) or hexafluorobenzene (2)) and a,a,o-trihydroperfluorinated alcohols. The reaction of octafluorotoluene with a,cc,otrihydroperfluorinated alcohols, H(CF2CFz),CH20H, n = 1-4 in acetonitrile (or DMF) in the presence of an equimolar amount of KOH provides the fluorinated alkyl aryl ethers 3 8 (Scheme 1).
含氟有机化合物由于其特殊的物理和生物特性而引起了人们的极大兴趣。因此，开发具有典型特征的含氟有机化合物的合成方法已成为含氟有机化学的重要课题。“全氟化三烷基胺和二烷基醚受到特别关注，因为它们不仅具有冰点低、挥发性高、电物理和热物理特性得到改善，而且还具有优异的润滑性能。此外，一些全氟化有机化合物还可作为生物和医药领域的氧气罐液体。”这些含氟化合物是由碳氢化合物前体通过电化学氟化或用氟原子直接氟化制备的。不幸的是，由于破坏性产物的出现，这些合成方法只能提供所需产物的低产量。另一方面，用其他化学品进行氟化通常需要危险和/或昂贵的氟化试剂。但值得注意的是，对部分氟化起始原料进行全氟化处理，由于破坏程度较低，且易于控制氟化过程，可获得较好的产品产率。此外，从四氟乙烯或六氟环氧丙烷聚合中得到的几种副产物可作为合成更复杂的部分氟化有机化合物的起始原料，*例如，a、a、o-三氢全氟化醇，H(CF2CF2)，CH20H, n = 1-4，这些是合成聚四氟乙烯的副产物，可能是合成部分氟化有机化合物的良好而廉价的起始原料^。^^'^^^^氟化醇已应用于与2,3,4,5,6-五氟苯乙烯，十氟偶氮苯/CsF 1 3或十氟-甲基二甲苯/NaOH 4的反应中。本文提出了一种以多氟苯衍生物(辛氟甲苯(1)或六氟苯(2))和a,a,o-三氢全氟醇为原料合成部分氟化烷基芳基醚的简便方法。在等摩尔量的KOH存在的乙腈(或DMF)中，辛氟甲苯与a、cc、三氢全氟化醇H(CF2CFz)、CH20H, n = 1-4反应，得到氟化烷基芳基醚38(方案1)。
{"title":"Synthesis of partly-fluorinated ethers: reaction of perfluoroalkoxyethylene or perfluorobenzene derevatives with various alcohols","authors":"Ki-Whan Chi, G. G. Furin","doi":"10.1109/KORUS.2000.865944","DOIUrl":"https://doi.org/10.1109/KORUS.2000.865944","url":null,"abstract":"Fluoroorganic compounds have attracted a great deal of interest due to their peculiar physical and biological properties. Accordingly, development of a synthetic method for the preparation of fluoroorganic compounds with typical characteristics has become an important issue in fluoroorganic chemistry.’ Perfluorinated trialkylamines and dialkyl ethers have been particularly focused on since they are characterized not only by low freezing points, high volatility, improved electrophysical and thermophysical characteristics but also by an excellent lubricating property .’ Moreover, some of perfluorinated organic compounds are also useful as an oxygen-canying liquid in biology and medi~ine.~ These fluoroogranic compounds have been prepared from hydrocarbon precursors either by electrochemical fluorination4 or by direct fluorinationS with Fz. Unfortunately, those synthetic methodologies provide only low yields of the desired products due to the occurrence of destructive products. On the other hand, fluorination with other chemicals usually requires hazardous and/or expensive fluorinating reagents. It is noteworthy, however, that perfluorination of partly-fluorinated starting materials gives better yields of the desired products because of the lower degree of the destruction process and the easiness of control of fl~orination.~” Moreover, several by-products obtained from polymerization of tetrafluoroethylene or hexafluoroepoxypropylene can be used as starting materials in the synthesis of more complex partly-fluorinated organic compounds,* For example, a,a,o-trihydroperfluorinated alcohols, H(CF2CF2),CH20H, n = 1-4, which are the by-products in the synthesis of polytetrafluoroethylene might be a good and cheap starting material for the synthesis of partly-fluorinated organic compound^.^^'^^^^ The fluorinated alcohols .have been applied to the reaction with 2,3,4,5,6-pentafluorostyreneMaH’2, decafluoroazobenzene/CsF l 3 or decafluoro-mdimethylbenzene/NaOH 4. In this paper we would like to publish a simple and convenient method for the synthesis of partlyfluorinated alkyl aryl ethers by using a polyfluorobenzene derivative (octafluorotoluene (1) or hexafluorobenzene (2)) and a,a,o-trihydroperfluorinated alcohols. The reaction of octafluorotoluene with a,cc,otrihydroperfluorinated alcohols, H(CF2CFz),CH20H, n = 1-4 in acetonitrile (or DMF) in the presence of an equimolar amount of KOH provides the fluorinated alkyl aryl ethers 3 8 (Scheme 1).","PeriodicalId":20531,"journal":{"name":"Proceedings KORUS 2000. The 4th Korea-Russia International Symposium On Science and Technology","volume":"5 1","pages":"169-172"},"PeriodicalIF":0.0,"publicationDate":"2000-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86692885","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2000-06-27DOI: 10.1109/KORUS.2000.866072
Tae-Hyun Jung, K. Park, W. Lee
In this paper, wire electric discharge grinding(WEDG) method for machining a micro shaft was introduced and the machining characteristics was investigated. From the experimental results, it was concluded that high surface integrity could be obtained by use of dielectric fluid spray method and small capacitive condenser. KeyW ords : Wire Electric Discharge Grinding, Micro Electric Discharge Machining, Dielectric Spray Method, Dielectric Stream Method
{"title":"A study on the micro electric discharge grinding characteristics of WC-Co-relationship between surface integrity and dielectric conditions-","authors":"Tae-Hyun Jung, K. Park, W. Lee","doi":"10.1109/KORUS.2000.866072","DOIUrl":"https://doi.org/10.1109/KORUS.2000.866072","url":null,"abstract":"In this paper, wire electric discharge grinding(WEDG) method for machining a micro shaft was introduced and the machining characteristics was investigated. From the experimental results, it was concluded that high surface integrity could be obtained by use of dielectric fluid spray method and small capacitive condenser. KeyW ords : Wire Electric Discharge Grinding, Micro Electric Discharge Machining, Dielectric Spray Method, Dielectric Stream Method","PeriodicalId":20531,"journal":{"name":"Proceedings KORUS 2000. The 4th Korea-Russia International Symposium On Science and Technology","volume":"26 1","pages":"134-139"},"PeriodicalIF":0.0,"publicationDate":"2000-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88325777","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2000-06-27DOI: 10.1109/KORUS.2000.866068
K. Egashira, T. Masuzawa, M. Fujino, Xi-Qing Sun
Most machining methods have difficulties in machining hard, brittle materials such as glass, ceramics, <.md silicon. Ultrasonic machining (USM) is a unique method from this point of view, because it easily machines these materials. However, US.M has a lilnitation in its application to micromachining because there moe problems in fixing microtools to the machine <.md maintaining high precision. In this paper we propose a technique of micro-USIvI by applying on-the-machine tool fabrication by wire electrodischm'ge glinding (WEDG). As a result, we were able to make microholes as small as 20}lm in diameter on a silicon plate. Additional expeliments revealed the possibility of wide application.
{"title":"Application of USM to micromachining by on-the-machine tool fabrication","authors":"K. Egashira, T. Masuzawa, M. Fujino, Xi-Qing Sun","doi":"10.1109/KORUS.2000.866068","DOIUrl":"https://doi.org/10.1109/KORUS.2000.866068","url":null,"abstract":"Most machining methods have difficulties in machining hard, brittle materials such as glass, ceramics, <.md silicon. Ultrasonic machining (USM) is a unique method from this point of view, because it easily machines these materials. However, US.M has a lilnitation in its application to micromachining because there moe problems in fixing microtools to the machine <.md maintaining high precision. In this paper we propose a technique of micro-USIvI by applying on-the-machine tool fabrication by wire electrodischm'ge glinding (WEDG). As a result, we were able to make microholes as small as 20}lm in diameter on a silicon plate. Additional expeliments revealed the possibility of wide application.","PeriodicalId":20531,"journal":{"name":"Proceedings KORUS 2000. The 4th Korea-Russia International Symposium On Science and Technology","volume":"87 1","pages":"106-115"},"PeriodicalIF":0.0,"publicationDate":"2000-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85463548","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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