FeNi@SiC磁性磨料制备及研磨行为

成波; 杨蓓; 梁佳彬; 陈瑞瑞; 侯东; 赵旭东; 梁国栋; 张辛健; 李文生

doi:10.16490/j.cnki.issn.1001-3660.2025.24.014

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表面技术 ›› 2025, Vol. 54 ›› Issue (24) : 173-183. DOI: 10.16490/j.cnki.issn.1001-3660.2025.24.014

精密与超精密加工

FeNi@SiC磁性磨料制备及研磨行为

成波¹, 杨蓓¹, 梁佳彬², 陈瑞瑞¹, 侯东¹, 赵旭东¹, 梁国栋¹, 张辛健¹, 李文生^1,3,*

作者信息 +

Preparation and Grinding Behavior of FeNi@SiC Magnetic Abrasives

CHENG Bo¹, YANG Bei¹, LIANG Jiabin², CHEN Ruirui¹, HOU Dong¹, ZHAO Xudong¹, LIANG Guodong¹, ZHANG Xinjian¹, LI Wensheng^1,3,*

Author information +

文章历史 +

摘要

目的提高磁性磨料SiC磨粒相转化率,降低Gd₂Zr₂O₇热障陶瓷涂层表面粗糙度。方法利用C粉和Si粉在FeNi₅₀球形粉末表面原位生成SiC磨粒相,优化了机械球磨转速、时间及真空烧结温度。对所制备磨料微观形貌、物相、磨料导磁相与磨粒相的纳米硬度与弹性模量进行了分析。通过单一变量法,确定了制备FeNi@SiC磁性磨料的最佳工艺参数,利用该工艺条件下获得的磁性磨料对等离子喷涂Gd₂Zr₂O₇热障陶瓷涂层进行磁力研磨加工。结果随着球磨转速增加,C粉和Si粉均匀包覆在基体FeNi粉末表面;球磨10 h包覆效果最佳;FeNi粉末与C粉Si粉的比例为6∶2∶1时,FeNi@SiC球形粉末壳层状结构明显;随烧结温度增加,生成SiC物相含量增加。球磨参数：200 r/min,10 h;质量比：6∶2∶1;烧结温度：1 350 ℃; 烧结时间：2 h,所制备的磁性磨料,SiC包裹在FeNi粉末表面,磨粒相中SiC含量达32.2%,磨粒相平均纳米硬度为11.31 GPa。磁力研磨加工实验后,Gd₂Zr₂O₇热障陶瓷涂层的Ra从15.8 μm下降到2.08 μm,表面变得光滑、平坦。结论利用C粉和Si粉在FeNi₅₀球形粉末表面原位生成法成功制备核-壳结构FeNi@SiC磁性磨料,有效提高了磁性磨料的加工性能。

Abstract

The work aims to improve the phase conversion rate of the SiC abrasive particles in the magnetic abrasive and reduce the surface roughness of the ceramic layer of the thermal barrier coatings. The SiC abrasive particle phase was in-situ generated on the surface of the FeNi₅₀ spherical powder with C powder and Si powder, and the rotation speed and duration of mechanical ball milling as well as the sintering temperature were optimized. The microstructure and phase composition of the prepared abrasive, and the nano-hardness and elastic modulus of the magnetic-conductive phase as well as the abrasive particle phase were analyzed. Through the single-variable method, the optimal process parameters for preparing FeNi@SiC magnetic abrasive were determined. The magnetic abrasive obtained under these process conditions was used to conduct magnetic force grinding processing on the plasma-sprayed Gd₂Zr₂O₇ ceramic layer, reducing the surface roughness of the Gd₂Zr₂O₇ ceramic layer. The magnetic abrasive was analyzed with a scanning electron microscope (SEM), an X-ray diffractometer (XRD), and a nano-indentation tester, and the microstructure, phase composition of the magnetic abrasive, and the nano-hardness and elastic modulus of the magnetic-conductive phase as well as the abrasive particle phase were analyzed respectively. When the ball milling rotation speed was 100 r/min, the grinding phase could not completely wrap the matrix FeNi powder. When the ball milling rotation speed was 200 r/min, the C powder and Si powder were uniformly coated on the surface of the matrix FeNi powder. When the ball milling time was 5 h, the bonding between the grinding phase and the FeNi powder was poor. With the increase of the ball milling time, the C powder and Si powder were refined and the coating became more uniform. The coating effect was the best at 10 h. When the ball milling time was 15 h, the surface of the abrasive collided and rubbed, resulting in partial fragmentation and deformation. When the ratio of FeNi powder, C powder, and Si powder was 6 : 2 : 1, the shell-layer structure of the FeNi@SiC spherical powder was obvious. With the increase of the sintering temperature, the SiC phase was generated on the surface of the magnetic abrasive, and the content of SiC increased. With the ball milling parameters of 200 r/min and 10 h, the mass ratio of 6 : 2 : 1, the sintering temperature of 1 350 ℃, and the sintering time of 2 h, the prepared core-shell structured magnetic abrasive had SiC wrapped on the surface of the spherical FeNi powder. The content of SiC in the abrasive particle phase reached 32.2%, and the average nano-hardness of the abrasive particle phase was 11.31 GPa, showing excellent wear resistance. After the magnetic force grinding processing experiment, the Ra of the Gd₂Zr₂O₇ ceramic layer decreased from 15.8 μm to 2.08 μm, and the surface became smooth and flat. The core-shell structured FeNi@SiC magnetic abrasives are successfully prepared by the in-situ generation method with C powder and Si powder on the surface of FeNi₅₀ spherical powder. This method effectively improves the processing performance of the magnetic abrasives and reduces the surface roughness of the Gd₂Zr₂O₇ ceramic layer.

导出引用

成波, 杨蓓, 梁佳彬, 陈瑞瑞, 侯东, 赵旭东, 梁国栋, 张辛健, 李文生. FeNi@SiC磁性磨料制备及研磨行为[J]. 表面技术. 2025, 54(24): 173-183

CHENG Bo, YANG Bei, LIANG Jiabin, CHEN Ruirui, HOU Dong, ZHAO Xudong, LIANG Guodong, ZHANG Xinjian, LI Wensheng. Preparation and Grinding Behavior of FeNi@SiC Magnetic Abrasives[J]. Surface Technology. 2025, 54(24): 173-183

中图分类号： TG733

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