Characterization of NbSi_2–Al_2O_3 nanocomposite coatings prepared with plasma spraying mechanically alloyed powders

查看全文 作　　者：Zohreh [1]Yazdani;Fathallah [1]Karimzadeh;Mohammad-Hasan [1]Abbasi;Abbas [1]Amini

机构地区：[1]Department of Materials Engineering, Isfahan University of Technology

出　　处：《International Journal of Minerals,Metallurgy and Materials》索引2015年第22卷第7期,共7页

摘　　要：The present study characterized NbS i2–Al2O3 nanocomposite powders plasma-sprayed on Ti–6Al–4Vsubstrates. The powders were agglomerated to obtain suitable particle sizes for spraying. The agglomerated powders were then plasma-sprayed using atmospheric plasma spraying. The structural transformations of the powders along with the morphological and mechanical changes of the coatings were examined by X-ray diffraction, scanning electron microscopy, energy dispersive spectroscopy, transmission electron microscopy, and hardness testing. The results showed that after plasma spraying, the grain size increased, and the lattice strain decreased. However, the grain size of this compound after spraying was still in the nanometer range. The coating was uniform and exhibited good adhesion to the substrate. The microhardness and fracture toughness of the nanocomposite coating were higher than those of a nanostructured NbS i2 coating. 关键词：大气等离子喷涂纳米复合涂层机械合金化粉末制备扫描电子显微镜透射电子显微镜表征纳米复合粉末

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Characterization of NbSi_2–Al_2O_3 nanocomposite coatings prepared with plasma spraying mechanically alloyed powders

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