Production of Ni-W-P Powder by the Combined Use of Hypophoshorous Acid Reduction and Ultrasonic Reduction.pdf

Production of Ni-W-P Powder by the Combined Use of Hypophoshorous Acid Reduction and Ultrasonic Reduction.pdf

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Production of Ni-W-P Powder by the Combined Use of Hypophoshorous Acid Reduction and Ultrasonic Reduction.pdf

August2010,Volume4,No.8(SerialNo.33) JournalofMaterialsScienceandEngineering,ISSN 1934-8959,USA 簿Ll搭t,, .IiNG ProductionofNi-W --P PowderbytheCombinedUseof HypOphoShorOUSAcidReductionandUltrasonic Reduction AtsushiChibaandKentaGoto DepartmentofMaterialsChemistry,YokohamaNationalUniversity,~bkohama240—8501,Japan Received:February01,2010/Accepted:March12,2010/Published:August25,2010 Abstract:Thefineparticlehasbeenofmajorinterestlatelyforitspossibilityofapplications.Thenewmethodofproductionoffine powderthatthesamecompositionmetalwaselectroplatedonfineparticleofsamecompositionhadbeendeveloped.Combinationof sonicationwasconvenienttofinepowderbecausesonicationwaspowerfulagitation.Theeffectsoffrequencyofsonicationonthe amountofdepositedpowderwerelargerinorderof28kHz=45kHz100kHzstationarystate=magneticagitationf300rpm).The depositedpowderwascrystalline.Nicontentinpowderwas81wt%.W contentwas10wt%.Pcontentwas9wt%.Particlesizewas obtainedabout41%(over2.0 m),about26% (1.5-2.0 m),about23% (1.0-1.5gm)andabout6%(under1rtm).Apowderrecovery methodwasneededifsmallerpowdergotten Keywords:Powder,Ni—W —P.electrolessplating,sonication,hypophoshorOusacid 1.IntrOductiOn material,etc..SomeelectrolessNi-Pplatinghadbeen reported [1—5].Itwasexpectedintheelectronic Ifultrasonic wave is irradiated into solution.a componentfield,becausetheplatingfilm hasthehigh specialreactionplace(somethousandsdegreeand hardness.OthercompositefilmswereNi-W-metal,and somethousandsatmosphericpressure)willgenerate Ni—metall—metal2.Reactions of electrole

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