CAJ | 학술논문

利用超声波辅助化学沉积法,在45钢基体表面制得Ni-P-SiC镀层.利用扫描电镜(SEM)、X射线衍射仪(XRD)、显微硬度计和电化学工作站研究热处理对 Ni-P-SiC 镀层组织结构和性能的影响规律.结果表明,Ni-P-SiC 镀层的镍和 SiC 的平均粒径为91．7和46．8 nm.当热处理温度升高到400℃时,Ni-P-SiC镀层出现新的Ni3 P 和 Nix Py 相；当热处理温度高达600℃时,Ni-P-SiC 镀层中存在 Ni、NiO、Ni3 P、Nix Py 和 SiC 相,Ni-P-SiC3、Ni-P-SiC6、Ni-P-SiC9镀层的显微硬度分别为1170．4,1265．1和1313．6 HV. Ni-P-SiC镀层经400℃热处理1 h 后,其耐腐蚀性能最佳.
이용초성파보조화학침적법,재45강기체표면제득Ni-P-SiC도층.이용소묘전경(SEM)、X사선연사의(XRD)、현미경도계화전화학공작참연구열처리대 Ni-P-SiC 도층조직결구화성능적영향규률.결과표명,Ni-P-SiC 도층적얼화 SiC 적평균립경위91．7화46．8 nm.당열처리온도승고도400℃시,Ni-P-SiC도층출현신적Ni3 P 화 Nix Py 상；당열처리온도고체600℃시,Ni-P-SiC 도층중존재 Ni、NiO、Ni3 P、Nix Py 화 SiC 상,Ni-P-SiC3、Ni-P-SiC6、Ni-P-SiC9도층적현미경도분별위1170．4,1265．1화1313．6 HV. Ni-P-SiC도층경400℃열처리1 h 후,기내부식성능최가.
Ni-P-SiC coatings were successfully deposited onto 45 steel substrates by using ultrasonic-electroless process.The effect of heat treatment on the structures and corrosion characteristics of the Ni-P-SiC coatings were investigated by scanning electron microscope (SEM),X-ray diffraction (XRD),Vickers hardness,and electrochemical impedance spectroscopy (EIS)analyses.The results indicate that the optimum grain diameters of Ni and SiC in the as-plated Ni-P-SiC coatings are approximately 91.7 and 46.8 nm,respectively.When the heat-treatment temperature is increased to 400 ℃,the coating crystallizes into Ni3 P and Nix Py .After heat treatment at 600 ℃,the coating changes into NiO,Ni3P and NixPy.And the microhardnesses of Ni-P-SiC3,Ni-P-SiC6,and Ni-P-SiC9 coatings are 1 170.4,1 265.1 and 1 313.6 HV,respectively.The lowest corrosion current density value is obtained for the coatings heat treated at 400 ℃ for 1 h.