采用Ni-Al共沉积与真空热处理复合技术,即不同颗粒Al（平均尺寸85 nm,3μm）与Ni电沉积,然后进行600℃×4 h低温真空热处理,制备γ＇/γ结构Ni-Al纳米复合涂层（A-ENC）及微米复合涂层（A-EMC）。与A-EMC相比,A-ENC基体晶粒尺寸更细小,且γ相中溶入更多的Al。1000℃×20 h高温氧化实验表明：A-ENC的氧化速率远低于A-EMC的,这是由于Al颗粒尺寸的不同,使得纳米颗粒复合转化的γ＇/γ涂层氧化初期形成的Al2O3晶核间距大大地缩短,进而缩短Al2O3晶核的间距,从而大大减少了Al2O3核横向生长互相连接成连续Al2O3膜所需要的时间。
Annealed electrodeposited Ni-Al nano-composite(A-ENC)and micro-composite,(A-EMC) coatings with γ′/γ structure were prepared by Ni-Al composite electrodeposition on nickel plate and subsequent vacuum heat treatment.Compared with A-EMC coatings,A-ENC coatings exhibits finer grain sizes of matrix and more Al in the γ-phase matrix.A-ENC coatings show beffer oxidation resistance than that of A-EMC coatings during oxidation in air at 1000℃ for 20 h.It is argued that the early formation of a continuous Al2O3 layer in the A-ENC coatings during oxidation is responsible for its higher oxidation resistance.The size effect of the Al particles on the oxidation behavior of the composite coatings is discussed in detail.
参考文献
| [1] | N.S. Sbloff;C.T. Liu .Emerging applications of intermetallics[J].Intermetallics,2000(9/11):1313-1320. |
| [2] | Odette G R;Chao B L;Sheckherd J W et al.Ductile phase toughening mechanisms in a TiAl-TiNb laminate composite[J].Acta Metallurgica Et Materialia,1992,40:2381-2389. |
| [3] | Heathcote J;Odette G R;Lucas G E .On the micromeehanies of low temperature strength and toughness of intermetallic/metallic microlaminate composites[J].Acta Materialia,1996,44:4289-4299. |
| [4] | Meng X K;Shen H;Vehoff H et al.Ngan.Fractography,elastic modulus,and oxidation resistance of novel metal-intermetallic Ni/Ni3 Al multilayer films[J].Journal of Materials Research,2002,17:790-796. |
| [5] | Han B X;Zhang H T;Zhao W J et al.A study on microstructure and service property of Ni3Al base alloy irradiated by intense pulsed ion beams[J].Surface and Coatings Technology,2002,158-159:482-487. |
| [6] | Izaki M;Fukusumi M;Enomoto H et al.High-temperature oxidation resistance of Ni-Al alloys films prepared by heating electrodeposited composite[J].Journal of the Japan Institute of Metals,1993,57:182-189. |
| [7] | Susan D F;Misiolek W Z;Marder A R .Reaction synthesis of Ni-Al-hased particle composite[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,2001,32:379-390. |
| [8] | D. F. SUSAN;A. R. MARDER .Ni-Al COMPOSITE COATINGS: DIFFUSION ANALYSIS AND COATING LIFETIME ESTIMATION[J].Acta materialia,2001(7):1153-1163. |
| [9] | Schumann E;Ruhle M .M icrostructural observations on the oxidation of γ'-Ni3 Al at high oxygen partial pressure[J].Acta Metallurgica Et Materialia,1994,42:1481-1487. |
| [10] | Pint B A .On the formation of interfacial and internal voids in α-Al2O3 scales[J].Oxidation of Metals,1997,48:303-328. |
| [11] | Giggins C S;Pettit F S .The effect of alloy grain size and surface deformation on the selective oxidation of chromium in Ni-Cr alloys at temperature of 900 and 1100 ℃[J].Transactions TMS-AIME,1969,245:2509-2514. |
| [12] | Wang F H;Lou H Y;Wu W T.Oxidation resistance of sputtered nanoerystalline Ni3 Al coating[M].北京:万国学术出版社,1995:465-468. |
| [13] | Wang F H .Oxidation resistance of sputtered Ni3(AlCr)nanocrystalline coating[J].Oxidation of Metals,1997,48:215-224. |
| [14] | Perez P;Gonzalez-Carrasco J L;Adeva P .Influence of powder particle size on the oxidation behavior of a PM Ni3 Al alloy[J].Oxidation of Metals,1998,49:485-507. |
| [15] | Peng X;Zhou Y;Zhang Y.On the development and the oxidation of novel Ni-Cr and Ni-Al nanoeoatings by composite electrodeposition[J].Materials Science Forum,2004(461-464):409-417. |
| [16] | Zhang Y;Peng X;Wang F .Development and oxidation at 800 ℃ of a novel eleetrodeposited Ni-Cr nanocomposite films[J].Materials Letters,2004,58:1134-1138. |
| [17] | Zhang C;Peng X;Zhao J et al.Development and oxidation at 800 ℃ of a novel electrodeposited Ni-Cr nanocomposite film[J].Journal of the Electrochemical Society,2005,152:B321-B326. |
| [18] | Zhou Y;Peng X;Wang F .Oxidation of a novel electrodeposited Ni-Al nanocomposite film at 1050 ℃[J].Seripta Mater,2004,50:1429-1433. |
| [19] | Zhou Y;Peng X;Wang F .Size effect of Al particles on the oxidation of electrodeposited Ni-Al composite coatings[J].Oxidation of Metals,2005,64:169-183. |
| [20] | Yang X.Preparation and high temperature corrosion of novel electrodeposited Ni-Cr-Al nanocomposites[M].Institute of Metal Research,Chinese Academy of Sciences,2007 |
| [21] | Susan D F;Marder A R .Oxidation of Ni-Al-base electrodeposited composite coatings.II:Oxidation kinetics and morphology at 1000 ℃[J].Oxidation of Metals,2002,57:159-180. |
| [22] | Yang X;Peng X;Wang F .Effect of annealing treatment on the oxidation of an eleetrodeposited alumina-forming Ni-Al nanocomposite[J].Corrosion Science,2008,50:3227-3232. |
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