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1、復(fù)合材料學(xué)報(bào)第21卷第2期4月2004年ACTAMATERIAECOMPOSITAESINICAVol.21No.2April2004文章編號(hào):1000-3851(2004D02-0008-06電沉積CO-Ni-Al復(fù)合2O3鍍層微觀結(jié)構(gòu)及高溫性能武剛1李寧1周德瑞1倉知三夫2(1.哈爾濱工業(yè)大學(xué)應(yīng)用化學(xué)系哈爾濱150001;2.日本京都大學(xué)工學(xué)部京都606-8239D摘要:在氨基磺酸鹽電解液中利用復(fù)合電沉積技術(shù)制備得到了Co-Ni合金基中彌散分布Al顆粒的金屬2O3基復(fù)合鍍層,通過SEMAFM以及XRD等分析測試方法研究了Co-Ni-Al復(fù)合鍍層的表面形貌和微觀晶體
2、結(jié)2O3構(gòu),結(jié)果發(fā)現(xiàn):Co-Ni-Al的表面形貌和微觀晶體結(jié)構(gòu)主要受鍍層中鈷含量的影響,高鈷含量復(fù)合鍍層具有~cp2O3結(jié)構(gòu)其表面形貌比具有Fcc結(jié)構(gòu)的低鈷含量鍍層的表面更加均勻細(xì)致,Al顆粒在Co-Ni合金中的共沉積沒2O3有改變合金固溶體的相組成但卻改變了各晶面的優(yōu)勢生長,通過研究復(fù)合鍍層的硬度~高溫耐磨性~高溫抗氧化性~熱膨脹系數(shù)和熱導(dǎo)率表明:Co-Ni-Al具有較好的高溫耐磨性和高溫抗氧化能力并且高鈷含量的復(fù)合鍍層2O3相對于低鈷鍍層具有較低的熱膨脹系數(shù)和較高的熱導(dǎo)率,關(guān)鍵詞:Co-Ni-Al復(fù)合鍍層;高溫耐磨;高溫氧化;熱物理特性2O3;中圖分類號(hào):TB33
3、1文獻(xiàn)標(biāo)識(shí)碼:AMICROSTRUCTUREANDPROPERTIESOFCO-Ni-Al2O3COMPOSITECOATINGSATTHEHIGHTEMPERATURE1112UGangLINingZ~OUDeruiMITSUOKurachi(1.DepartmentofAppliedChemistry~arbinInstituteofTechnologyP.O.Box411~arbin150001China;2.FacultyofEngineeringKyotoUniversityKyoto606-8283JapanDAbstract:Themetalmatrix
4、compositecoatingthatAl2O3particlesincorporateintoCo-NialloyWaspreparedbytheelectrodepositiontechniguefromsulfamateelectrolyte.ItillustratesfromtheexaminedresultsofSEMAFMandXRDthatsurfacemorphologyandmicrostructureofCo-Ni-Al2O3coatingsappeartobemainlyinfluencedbyvariationsincobaltcontent
5、.ThecodepositionofAl2O3particlesinCo-NialloyscannotchangethephasestructureofsolidsolutiononlyaffectsthegroWthandorientationofcrystalplanesandmostlyincreasesthedvalueoflattice.Thehigh-temperaturepropertiesoftheCo-Ni-Al2O3coatingsincludinghardnessWearresistanceoxida-tionresistancecoeffici
6、entsofthermalexpansionandthermalconductivityathightemperatureWerealsoinvestigated.TheresultsshoWthatCo-Ni-Al2O3compositecoatingshavegoodperfor-manceofWearresistanceandoxidationresistanceatthehightemperature.FurthermorethecompositecoatingsWithhigh-cobaltcontentshoWloWercoefficientsofther
7、malexpansionandhigherthermalconductivitythancoatingsWithloW-cobaltcontentdo.KGSWOrGs:Co-Ni-Al2O3;compositecoating;Wearresistance;oxidationresistance;thermalphysicalproperties在金屬和合金中摻入第二相惰性陶瓷顆粒制備因此在材料表面鍍覆一層復(fù)合材料是一種經(jīng)濟(jì)而得到的復(fù)合鍍層能夠在很大程度上改善材料的表面有效的材料表面改性手段,和傳統(tǒng)的制備復(fù)合鍍層硬度~強(qiáng)度I1II2II3II4I和催
