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1、---------------------------------------------------------------范文最新推薦------------------------------------------------------Ni-Al金屬間化合物涂層的制備方法摘要:通過在普通合金鋼(Mn)基材表面采用電鍍工藝制備一層Ni涂層,然后在Ni涂層表面制備一層Al層,通過固體高溫擴散,制備出具有Fe-Ni-Al過渡層的Ni-Al金屬間化合物涂層,該涂層將具有界面結(jié)合力強、熱應力小、導熱性較好等優(yōu)點,將具有很高的應用價值。結(jié)果表明:(1)采用電鍍工藝,
2、在普通合金鋼基體表面制備出一約40µm的Ni涂層。(2)對鍍鎳后試樣,采用固體粉末滲鋁方法進行滲鋁,制備出一連續(xù)涂層,在距試樣表面35µm內(nèi),涂層相為Ni2Al3。距試樣表面35µm~55µm范圍,為過渡區(qū)(三種元素共存),距試樣表面55µm后面區(qū)域為Fe基體。10724關鍵詞:15/15---------------------------------------------------------------范文最新推薦-----------------------------------------
3、-------------電鍍鎳涂層固體粉末滲鋁高溫擴散Ni-Al金屬間化合物畢業(yè)設計說明書(論文)外文摘要TitlestudyonpreparationofNi-AlintermetalliccompoundcoatingAbstractByplatingforalayerofNicoatingonthesubstratesurfaceintheordinaryalloysteel(Mn),andthenpreparedthesurfaceoftheNicoatinglayerofAllayer,diffusionthroughthesolidhightempe
4、rature,withthepreparationofFe-Ni-AlinterlayerNi-Alintermetalliccompoundcoatingwillbeproduced.thecoatinginterfacewillcombinewithstrong,heatstress,thermalconductivity,etc.Thatwillhaveahighvalueofproduction.Theresultsshowthat:(1)Byplatingprocess,anapproximately40μmNicoatingofwhichdiff
5、erentchangesofthicknessintheordinary15/15---------------------------------------------------------------范文最新推薦------------------------------------------------------alloysteelsubstratesurfacepreparationarearousedbecauseofavarietyoffactorsintheoutsideworld.(2)Bysolidhigh-temperaturediff
6、usionaluminizingtothesampleafternickel-plated,acontinuouscoatingiselectrodeposited.Inthedistanceof35μmfromthesurfaceofthesample,theprimaryphaseisNi2Al3.Intherangeof35μmto55μmfromthesurfaceofthesample,itisathetransitionzone(threeelementsco-exist).Beyondtherangeof55μmfromthe
7、samplesurface,itistheregionfortheFematrix.15/15---------------------------------------------------------------范文最新推薦------------------------------------------------------金屬間化合物性能介于金屬和陶瓷之間[1],在強度、硬度、化學穩(wěn)定性和高溫穩(wěn)定性等方面都非常優(yōu)越,但韌性普遍較差,多用來與普通的金屬或合金復合,也可單獨用于普通金屬或其合金難以應用的高載荷、高溫或腐蝕環(huán)境。將金屬間化合物用于材料的表
8、面涂層,不