Non-isothermal Crystallization and Thermal Transformation Behaviors of Plasma Sprayed Fe_(48)Cr_(15)Mo_(14)C_(15)B_(6)Y_(2)Amorphous Coating  

作　　者：WANG Miqi ZHOU Zehua YI Yu ZHANG Xin SHI Fang 汪米琪

机构地区：[1]Faculty of Mechanical and Material Engineering,Huaiyin Institute of Technology,Huai’an 223003,China [2]College of Materials Science and Engineering,Hohai University,Changzhou 213200,China [3]Jiangsu Key Laboratory of Advanced Manufacturing Technology,Huaiyin Institute of Technology,Huai’an 223003,China [4]Research Laboratory of Computational Mechanics,Huaiyin Institute of Technology,Huai’an 223003,China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2024年第6期1397-1405,共9页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the China Scholarship Council(No.201906710142)。

摘　　要：The non-isothermal crystallization dynamic behavior and mechanism of plasma sprayed Fe_(48)Cr_(15)Mo_(14)C_(15)B_(6)Y_(2)coating were thoroughly studied.The phase transition and crystallization kinetics of the coating were elaborately investigated by differential scanning calorimetry(DSC),X-ray diffraction(XRD),scanning electron microscopy(SEM),and transmission electron microscopy(TEM).The findings reveal that the characteristic temperatures of the coating shift to an elevated temperature at a higher heating rate and the crystallization processes are thermally activated.The 3-rd step of crystallization processes is more susceptible to the continuously increased heating rate while the onset crystallization reaction is less sensitive to the continuously enhanced heating rate.Fe_(23)(C,B)_6 phase is inclined to precipitate than other crystal phases due to the substantial pre-generation ofα-Fe.The onset nucleation and growth ofα-Fe crystals is tough due to a higher onset apparent activation energy.Meanwhile,the transformation from Fe_(23)(C,B)_(6)to FeB is harder in comparison with the precipitation of other crystals.The most parts of the three crystallization processes are dominated by three-dimensional diffusion model due to the fact that most values of local Avrami exponent are higher than 2.5.

关 键 词：plasma spraying non-isothermal crystallization phase transition diffusion mode 

分 类 号：TG178[金属学及工艺—金属表面处理]