本文關鍵詞：氧化鋁粉體表面化學鍍鎳及其在鎳—氧化鋁復合涂層制備中的應用　出處：《大連工業(yè)大學》2016年碩士論文　論文類型：學位論文

  更多相關文章： Ni-Al_2O_3復合涂層 化學鍍 表面活性劑 電沉積

【摘要】：陶瓷增強鎳基復合材料具有良好的抗氧化、耐蝕、耐高溫等性能,是航空、艦船以及工業(yè)燃氣渦輪發(fā)動機等重要受熱部件表面首選的防護涂層材料。本實驗采用Sn Cl2敏化和Pd Cl2活化的方法在HP4A1型氧化鋁粉體表面進行化學鍍鎳,然后分別采用亞微米級原始氧化鋁粉體和表面鍍鎳氧化鋁粉體電沉積制備Ni-Al_2O_3復合涂層,并對涂層質量及其影響因素進行了研究。研究了不同粉體特征、表面活性劑種類和濃度對鍍液中顆粒穩(wěn)定性、分散度以及涂層中Al_2O_3顆粒分布和濃度、涂層性能的影響。所使用的表面活性劑包括十二烷基硫酸鈉(SDS)、曲拉通X-100(Triton X-100)和十六烷基三甲基溴化銨(CTAB)。采用粒度測試和沉降方法測定顆粒在鍍液中的穩(wěn)定性,并用掃面電鏡(SEM)分析涂層結構。結果表明,鍍鎳后的氧化鋁粉體在使用表面活性劑的鍍液中沉降較平穩(wěn),表面活性劑對其穩(wěn)定性影響較大,而對原始氧化鋁粉體的沉降影響很小。相較來說,SDS對鍍液穩(wěn)定性影響最大,更有利于顆粒在鍍液中的穩(wěn)定性。單種表面活性劑對原始氧化鋁粉體的粒度影響很小,而兩種表面活性劑復合添加甚至會產(chǎn)生“負作用”。CTAB對鍍鎳后的Al_2O_3粒度的影響較小,而Triton X-100能讓鍍鎳后的Al_2O_3的粒度變小,而SDS可以使鍍鎳后的Al_2O_3顆粒粒度明顯降低。采用鍍鎳后的氧化鋁粉體得到的Ni-Al_2O_3鍍層硬度明顯高于采用原始氧化鋁粉體獲得的鍍層硬度。
[Abstract]:Ceramic reinforced nickel matrix composites have good oxidation resistance, corrosion resistance, high temperature resistance and other properties, it is aviation. The first choice of protective coating material on the surface of important heated parts such as ship and industrial gas turbine engine. Sn Cl2 sensitization and PD were used in this experiment. Electroless nickel plating was carried out on the surface of HP4A1 alumina powder by Cl2 activation. Then the Ni-Al_2O_3 composite coatings were prepared by electrodeposition of sub-micron raw alumina powder and nickel-plated alumina powder respectively. The quality of the coating and its influencing factors were studied. The stability of particles in the bath was studied with different powder characteristics, kinds and concentrations of surfactants. Dispersion, the distribution and concentration of Al_2O_3 particles in the coating, and the influence of coating properties. The surfactants used include 12 alkyl sodium sulfate. Triton X-100) and cetyltrimethylammonium bromide (CTABX). Particle size measurement and sedimentation method were used to determine the stability of the particles in the plating solution. The structure of the coating was analyzed by scanning electron microscope (SEM). The results showed that the deposition of the Al _ 2O _ 3 powder after nickel plating was stable in the bath with surfactant, and the surfactant had a great influence on the stability of the coating. However, the effect of SDS on the deposition of the original alumina powder is very small, and SDS has the greatest influence on the stability of the plating solution. The single surfactant has little effect on the particle size of the original alumina powder. However, the compound addition of two surfactants can even produce "negative effect". CTAB has little effect on the size of Al_2O_3 after nickel plating. And Triton X-100 can make the size of Al_2O_3 after nickel plating become smaller. However, SDS can obviously reduce the particle size of Al_2O_3 after nickel plating, and the hardness of Ni-Al_2O_3 coating obtained by nickel plating alumina powder is obviously higher than that obtained by using the original alumina powder. Hardness of the coating.
【學位授予單位】：大連工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2016
【分類號】：TG174.4

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