采用5 kW连续CO2激光器对经等离子喷涂的NiCoCrAlY结合层和ZrO2陶瓷层进行二次重熔处理,并利用金相显微镜、扫描电镜、电子探针和显微硬度计对激光熔敷涂层进行了显微结构、元素分布以及显微硬度观察与测试.结果表明:多道搭接工艺能降低熔敷涂层气孔率.ZrO2陶瓷层稀释度低,与基体结合完好.并观察到NiCoCrAlY合金层中存在明显的对流图案.加入了TiO2-Al-Ti添加剂的ZrO2陶瓷层激光重熔后得到了无裂纹的定向生长柱状晶,并且呈现一次枝晶平均间距为2.3 μm的表层和平均间距为3.8 μm的次表层结构.
参考文献
| [1] | Celik E;Avci E;Yilmaz F .Evaluation of interface reactions in thermal barrier ceramic coatings[J].Surface & Coatings Technology,1997(1/3):361-365. |
| [2] | Lugscheider E.;Dopper G.;Barimani C. .Ceramic thermal barrier coatings deposited with the electron beam-physical vapour deposition technique[J].Surface & Coatings Technology,1998(1/3):1221-1227. |
| [3] | Y.Gao;M.C.Chen .Study on Eb-PVD zirconia thermal barrier coatings for gas turbine blade protection[J].Materials and Manufacturing Processes,1999(5):691-696. |
| [4] | Alperine S;LELAIT L .Microstructure investigation of plasma- sprayed yttria partially stabilized zirconia TBC[J].Journal of Engineering for Gas Turbines and Power,Transactions of the ASME,1994,ASM116:258-265. |
| [5] | Harmsworth P D;STEVENS R .Microstructure of zirconia-yttria plasma-sprayed thermal barrier coatings[J].Journal of Materials Science,1992,27:616-624. |
| [6] | 高阳.激光熔敷抗氧化与隔热涂层组织结构及高温性能研究[J].腐蚀科学与防护技术,1998(02):70. |
| [7] | Agarwal A;DAHOTRE N B .Mechanical character ization of interface in laser surface engineered composite TiB2 coating on steel[J].Surface Engineering,2001,17(01):66-69. |
| [8] | Liu X B;YU L G .Synthesis of a nickel silicide - base composite coating on austenitic steel by laser cladding[J].Journal of Materials Science Letters,2001,20:1489-1492. |
| [9] | GAO Yang;LIANG Yong;SHI Changxu .Microstructure o laser remelted Ni -base alloy coating on stainless steel[J].Journal of Materials Science and Technology,1998,14(01):49-52. |
| [10] | 董世运,张幸红,赫晓东,徐滨士.激光熔覆铜基自生复合材料设计及其涂层研究[J].哈尔滨工业大学学报,2003(02):160-164. |
| [11] | 栾景飞,周振丰,胡建东,严密.共晶碳化物团球化对铸铁激光熔敷层抗裂性的影响[J].材料科学与工艺,2002(01):41-44. |
| [12] | 刘元富,赵海云,王华明,柳国萍.激光熔敷Ti5Si3/（NiTi2+β+Ti5Si3） 复合涂层组织与耐磨性[J].材料科学与工艺,2002(04):337-340. |
| [13] | Movchan BA.;Marinski GS. .Gradient protective coatings of different application produced by EB-PVD[J].Surface & Coatings Technology,1998(1/3):309-315. |
| [14] | Herr W;Broszeit E;Tech Univ Darmstadt Inst Mat Sci D-64283 Darmstadt Germany. .The influence of a heat treatment on the microstructure and mechanical properties of sputtered coatings[J].Surface & Coatings Technology,1997(1/3):335-340. |
| [15] | Diaz P;RALPH R;EDIRISINGHE M J .Transmission electron microscope characterization of a plasma sprayed ZrO2 - Y2O3 - TiO2thermal barrier coating[J].Materials Characterization,1998,41:55-67. |
| [16] | 高阳,陈孟成,李建平,汝继来,王仁智.射频磁控溅射沉积热障涂层结构特征及高温氧化性能[J].航空材料学报,2000(03):61-66. |
| [17] | S.S. BABU;R.P. MARTUKANITZ;K.D. PARKS .Toward Prediction of Microstructural Evolution during Laser Surface Alloying[J].Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science,2002(4):1189-1200. |
| [18] | Chande T;MAZUMDER J .Mass transport in laser surface alloying:Iron - nickel system[J].Applied Physics Letters,1982,41:42-43. |
| [19] | Chande T;MAZUMDER J .Two - dimensional transient model for mass transport in laser surface alloying[J].Journal of Applied Physics,1985,57:2226-2232. |
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