魏振毅,叶辉,赵小健,张玉叶,李强

• 1:福州大学材料科学与工程学院

摘要(Abstract)：

基于涂层部分熔化(PM)区比例,孔隙率和结合强度,通过系列实验得到最佳喷涂工艺参数。利用XRD衍射仪,扫描电镜和透射电镜研究等离子喷涂纳米结构Al2O3-13wt%/TiO2(AT13)复合涂层的微观结构;对涂层的显微硬度和断裂韧性进行了Weibull统计,通过磨损实验建立了磨损图。研究表明,涂层存在全熔化(FM)区和PM区,关键等离子喷涂参数(CPSP)的增大促进PM区比例的减小及涂层结合强度的增大。喷涂过程中物相发生了反应,涂层中FM和PM区分别由完全和部分熔化的粒子形成。PM区存在纳米尺寸的晶体和非晶态物质,粒子间发生液相烧结。Weibull统计表明涂层显微硬度和断裂韧性的统计分布存在对应于组织的双态分布。PM区的平均显微硬度低于FM区的,而其显微硬度的分散性更大;PM区的平均断裂韧性及其分散性大于FM区。

关键词(KeyWords)： AT13;纳米涂层;等离子喷涂;组织性能

Abstract:

Keywords:

基金项目(Foundation): 福建省科技厅科技计划重点项目(2005H031)

作者(Author): 魏振毅,叶辉,赵小健,张玉叶,李强

参考文献(References)：

• [1]Goberman D,Sohn Y H,ShawL,et al.Microstructure development of Al2O3-13wt%TiO2plasma sprayed coatings derived fromnanocrystalline powders[J].Acta Materialia,2002,50(5):1141-1152.
• [2]Bansal P,Padture N P,Vasiliev A,et al.Improved interfacial mechanical properties of Al2O3-13wt%TiO2plasma-sprayed coatings derived fromnanocrystalline powders[J].Acta Materialia,2003,51(10,11):2959-2970.
• [3]Lima RS,Moreau C,Marple B R.HVOF-sprayed coatings engineered from mixtures of nanostructured and submicron Al2O3-TiO2powders:An enhancedwear performance[J].Journal of Thermal Spray Technology,2007,16(5-6):866-872.
• [4]Lima RS,Marple B R.Thermal spray coatings engineeredfromnanostructured ceramic agglomerated powders for structural,thermal barrier and biomedicalapplications:Areview[J].Journal of Thermal Spray Technology,2007,16(1):40-63.
• [5]Wang Y,Tian W,Yang Y.Thermal shock behavior of nanostructured and conventional Al2O3/13 wt%TiO2coatings fabricated by plasma spraying[J].Surface and Coatings Technology,2007,201(18):7746-7754.
• [6]王铀,杨勇.热喷涂纳米结构涂层的研究进展及在外军舰艇上的应用[J].中国表面工程,2008,21(1):7-15.
• [7]Sa′nchez E,Bannier E,Cantavella V,et al.Deposition of Al2O3-TiO2nanostructured powders by atmospheric plasma spraying[J].Journal of Thermal SprayTechnology,2008,17(3):329-337.
• [8]Wang Y,Jiang S,Wang MD,et al.Abrasive wear characteristics of plasma sprayed nanostructured aluminar/titania coatings[J].Wear,2000,237(2):176-185.
• [9]Lima MM,Godoy C,Modenesa P J,et al.Coating fracture toughness determined by Vickers indentation:an important parameter in cavitation erosionresistance of WC-Cothermally sprayed coatings[J].Surface and Coatings Technology,2004,177-178:489-496.
• [10]Luo H,Goberman D,ShawL,et al.Indentationfracture behavior of plasma-sprayed nano-structured Al2O3-13wt%TiO2coatings[J].Materials Science andEngineering A,2003,346(1-2):237-245.
• [11]Venkataraman R,Pabla Singh S,Venkataraman B,et al.Ascanning electron microscopic study to observe the changes in the growth morphology of theαphased alumina-13 wt%titania coatings during plasma spraying[J].Surface and Coatings Technology,2008,202(21):5074-5083.
• [12]Fauchais P,Fukumoto M,Vardelle A,et al.Knowledge concerningsplat formation:Aninvitedreview[J].Journal of Thermal Spray Technology,2004,13(3):337-360.

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