为了缓解涂层和基体之间的热失配应力，采用化学镀方法在2A70铝合金表面上制备Ni-P和Ni-Cu-P过渡层；然后在镀层表面依次制备CoNiCrAlY粘结层和ZrO2-8%Y2O3(8YSZ)陶瓷层(质量分数)，获得复合热障涂层；并采用热循环方法评定该涂层体系的抗热震性能。结果表明，采用Ni-P镀层和Ni-Cu-P镀层作为过渡层的试样的热震寿命分别约为1000次和500次；Ni和Al元素的互扩散使过渡层与基体界面区域形成了扩散层和岛状颗粒，一些颗粒与扩散层连通后提高了涂层与基体的结合强度，但孤立的颗粒由于变形能力差，对涂层的寿命有不利影响；在交变应力下颗粒与基体界面处会形成裂纹，并最终导致涂层剥离。
To relieve the thermal mismatch stress between coatings and substrate, Ni-P and Ni-Cu-P electroless platings were fabricated onto 2A70 aluminum as interlayers. Subsequently, the specimen with plating was covered by CoNiCrAlY bond coat and ZrO2-8%Y2O3(8YSZ) top coat (mass fraction), then a novel thermal barrier coating (TBC) was produced. The thermal shock resistance of TBCs was evaluated by heat cycle test. The results indicate that the lifetimes of TBC with Ni-P interlayer and Ni-Cu-P interlayer are about 1000 cycles and 500 cycles, respectively. The interdiffusion of Ni and Al results in the formation of diffusion layers and island particles at the interface between interlayers and substrate. The connection between particles and diffusion layers improves the adhesion of coatings with substrate, while isolate particles are harmful to the lifetime of coatings due to their poor deformation ability under alternative stress. Crack initiation happens at the interfaces between particles and substrate, which leads to coatings spallation.
参考文献
| [1] | HIRSCH J .Automotive trends in aluminum-The European perspective[J].Materials Forum,2004,28:15-23. |
| [2] | 刘兵,彭超群,王日初,王小锋,李婷婷.大飞机用铝合金的研究现状及展望[J].中国有色金属学报,2010(09):1705-1715. |
| [3] | LI Zhan-ming;ZHU You-li;DU Xiao-kun;HUANG Yuan-lin .Microstructures and mechanical properties of 2024 aluminum alloy welded joint after ultrasonic peening treatment[J].RARE METAL MATERIALS AND ENGINEERING,2012,41(z2):307-311. |
| [4] | 郭海龙,孙志超,杨合.挤压态7075铝合金再结晶经验模型及应用[J].中国有色金属学报,2013(06):1507-1515. |
| [5] | A. G. Evans;D. R. Mumm;J. W. Hutchinson;G. H. Meier;F. S. Pettit .Mechanisms controlling the durability of thermal barrier coatings[J].Progress in materials science,2001(5):505-553. |
| [6] | 刘纯波,林锋,蒋显亮.热障涂层的研究现状与发展趋势[J].中国有色金属学报,2007(01):1-13. |
| [7] | Zhou YC.;Hashida T. .Coupled effects of temperature gradient and oxidation on thermal stress in thermal barrier coating system[J].International Journal of Solids and Structures,2001(24/25):4235-4264. |
| [8] | Hejwowski, T. .Comparative study of thermal barrier coatings for internal combustion engine[J].Vacuum: Technology Applications & Ion Physics: The International Journal & Abstracting Service for Vacuum Science & Technology,2010(5):610-616. |
| [9] | 赵海涛,贾薇,张学萍.等离子喷涂梯度涂层的显微组织结构和性能[J].沈阳工业大学学报,2003(06):468-470. |
| [10] | SAAD D;SAAD P;KAMO L .Thermal barrier coatings for high output turbocharged diesel engine[J].SAE Technical Paper,2007,1(01):1-11. |
| [11] | MARR M;WALLACE J S;MEMME S;CHANDRA S PERSHIN L MOSTAGHIMI J .An investigation of metal and ceramic thermal barrier coatings in a spark-ignition engine[J].SAE Technical Paper,2010,3(02):115-125. |
| [12] | M. Cerit;V. Ayhan;A. Parlak;H. Yasar .Thermal analysis of a partially ceramic coated piston: Effect on cold start HC emission in a spark ignition engine[J].Applied thermal engineering: Design, processes, equipment, economics,2011(2/3):336-341. |
| [13] | Balaraju JN;Rajam KS .Electroless deposition of Ni-Cu-P, Ni-W-P and Ni-W-Cu-P alloys[J].Surface & Coatings Technology,2005(2/3):154-161. |
| [14] | YU Hui-sheng;LUO Shou-fu;WANG Yong-rui .A comparative study on the crystallization behavior of electroless Ni-P and Ni-Cu-P deposits[J].Surface&Coatings Technology,2001,148:143-148. |
| [15] | SUI M L;LU K .Thermal expansion behavior of nanocrystalline Ni-P alloys of different grain sizes[J].Nanostructured Materials,1995,6:651-654. |
| [16] | Gu, L.;Chen, X.;Fan, X.;Liu, Y.;Zou, B.;Wang, Y.;Cao, X. .Improvement of thermal shock resistance for thermal barrier coating on aluminum alloy with various electroless interlayers[J].Surface & Coatings Technology,2011(1):29-36. |
| [17] | 高艳华,郭鸿镇,王晓晨,姚泽坤.等温锻造温度对2A70铝合金组织性能的影响[J].热加工工艺,2009(23):27-29. |
| [18] | HINO M;MURAKAMI K;MITOOKA Y;MURAOKA K KANADANI T .Effects of zincate treatment on adhesion of electroless Ni-P coating onto various aluminum alloys[J].Transactions of Nonferrous Metals Society of China,2009,19:814-818. |
| [19] | Ashassi-Sorkhabi H.;Dolati H.;Parvini-Ahmadi N.;Manzoori J. .Electroless deposition of Ni-Cu-P alloy and study of the influences of some parameters on the properties of deposits[J].Applied Surface Science: A Journal Devoted to the Properties of Interfaces in Relation to the Synthesis and Behaviour of Materials,2002(3/4):155-160. |
| [20] | 胡光辉,吴辉煌,杨防祖.镍磷化学镀层的耐蚀性及其与磷含量的关系[J].物理化学学报,2005(11):1299-1302. |
| [21] | MARTYAK N M .Characterization of thin electroless nickel coatings[J].Chemistry of Materials,1994,6:1667-1674. |
| [22] | S.Armyanov;J.Georgieva .Electroless Deposition of Ni-Cu-P Alloys in Acidic Solutions[J].Electrochemical and solid-state letters,1999(7):323-325. |
| [23] | DEAN J A.Lange's handbook of chemistry[M].New York:McGraw-Hill Book Company,Inc,1992:315-322. |
| [24] | HUABIN WANG;JIECAI HAN;SHANYI DU .Reaction Synthesis of Nickel/Aluminide Multilayer Composites Using Ni and Al Foils: Microstructures, Tensile Properties, and Deformation Behavior[J].Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science,2007(2):409-419. |
| [25] | 刘志义,李云涛,刘延斌,夏卿坤.Al-Cu-Mg-Ag合金析出相的研究进展[J].中国有色金属学报,2007(12):1905-1915. |
| [26] | RYLANDS L M;WILKES D M J;RAINFORTH W M;JONES H .Coarsening of precipitates and dispersoids in aluminium alloy matrices:A consolidation of the available experimental data[J].Journal of Materials Science,1994,29:1895-1900. |
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