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Ni-Mo-Al-MoSi2復合鍍層的制備

時間:2019-05-17 20:24來源:畢業論文
通過脈沖電沉積方法在鎳合金表面制備Ni-Mo-Al-MoSi2復合鍍層。通過改變電鍍工藝條件,探究電鍍工藝條件對Ni-Mo-Al-MoSi2復合鍍層中Al和Si含量的影響,獲得較佳的工藝條件。分別采用掃描電

摘要:通過脈沖電沉積方法在鎳合金表面制備Ni-Mo-Al-MoSi2復合鍍層。通過改變電鍍工藝條件,探究電鍍工藝條件對Ni-Mo-Al-MoSi2復合鍍層中Al和Si含量的影響,獲得較佳的工藝條件。分別采用掃描電子顯微鏡(SEM)、電子能譜儀(EDX)、X射線衍射儀(XRD),對所得鍍層的表面形貌、成分、物相結構進行表征。獲得較佳的工藝參數如下:電鍍液pH值為8.2,電鍍溫度為40℃,電流密度為18.75A/cm2,脈沖頻率為4000Hz,占空比為0.5,攪拌速度為400r/min和電鍍時間是20min。EDX表征結果顯示:在較佳的工藝條件下,Ni-Mo-Al-MoSi2復合鍍層中Al的含量為2.35%,Si的含量為2.23%。SEM表征結果顯示:Ni-Mo-Al-MoSi2復合鍍層表面較為平整,結瘤較小。XRD表征結果顯示:Ni-Mo-Al-MoSi2復合鍍層為晶態結構,鍍層在2θ=31.617°,43.570°,44.371°,51.703°, 76.225°時分別對應Al7.51Mo1.07Ni1.42(042),AlNi3(111),A0.9Ni4.22(111),MoNi4(200), MoSi2(213)晶面。35436
畢業論文關鍵詞:脈沖電沉積;復合鍍層 ;MoSi2;Al;Si
Abstract: Ni-Mo-Al-MoSi2 composite coatings were prepared on Ni alloy by electrodeposition method.The electroplating process conditions on the Ni-Mo-Al-MoSi2 composite coatings were studied, and the Al and Si contents of the composite coatings were investigated under different electroplating process conditions. The morphology surface, compositions and structure of composite plating were characterized by scanning electron microscopy (SEM), Energy Disperse and X-ray detectors (EDX), X-ray diffraction (XRD).Technological prarameter as follows: PH=8.2, electroyet temperature is 40℃, current density is 18.75A/cm2 , frequency is 4000Hz, dutyfactor is 0.5, stirring rate is 400 r/min, and plating time is 20 min. The characterization result of EDX shows that the Al and Si contents of Ni-Mo-Al-MoSi2 composite coatings based on technological prarameter above which is 2.35% and 2.23% respectively. SEM shows that the suface of Ni-Mo-Al-MoSi2 composite coatings are more meticulous and smooth. XRD indicates that Ni-Mo-Al-MoSi2 coatings are crystalline. The strong peak at 2θ=31.617°, 43.570°, 44.371°, 51.703°, 76.225° in the Ni-Mo-Al-MoSi2 coatings was attribute to Al7.51Mo1.07Ni1.42(042), AlNi3(111), A0.9Ni4.22(111), MoNi4(200), MoSi2(213). 源¥自%六:維;論-文'網=www.aftnzs.live
Keywords:pulse electrodeposited; composite coating; MoSi2; Al
 目  錄
1  前言    5
1.1  復合電鍍的介紹    5
1.1.1  復合鍍層的定義    5
1.1.2  固體微粒的選擇    5
1.1.3  復合鍍層的性能    5
1.1.4  影響復合鍍層性能的因素    6
1.1.5  脈沖電沉積法制備復合鍍層    7
1.2  復合電鍍工藝研究現狀    7
1.2.1  耐蝕型復合鍍材料    7
1.2.2  高硬度耐磨型復合鍍材料    8
1.2.3  耐高溫復合鍍材料    9
1.2.4  催化析氫用復合鍍鍍材料    10
1.3  Al元素和MoSi2電沉積工藝研究現狀    10
1.3.1  Al元素電沉積工藝研究現狀    10
1.3.2  MoSi2電沉積工藝研究現狀    11
1.4  本課題來源、研究內容及意義    12
1.4.1  課題來源    12
1.4.2  研究內容    12
1.4.3  研究背景及意義    12
2.  實驗部分    13
2.1  實驗材料及試劑    13
2.1.1  實驗材料    13
2.1.2  實驗試劑    13
2.2  實驗設備與裝置    13
2.2.1  實驗設備    14 Ni-Mo-Al-MoSi2復合鍍層的制備:http://www.aftnzs.live/cailiao/20190517/33380.html
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