CAJ | 학술논문

采用脉冲电沉积方法,在压缩机阀片表面制备Ni-SiC镀层。利用原子吸收分光光度计、透射电镜和硬度计研究脉冲电流密度对 Ni-SiC 镀层 SiC 粒子复合量、微观结构和显微硬度的影响。结果表明,随着脉冲电流密度的增大,Ni-SiC 镀层 SiC 粒子的复合量先增加后略有降低。在脉冲电流密度为7 A/dm2时,镀层SiC粒子的复合量高达9.92%(质量分数)。脉冲电流密度为7 A/dm2时,镀层致密、晶粒细小,SiC 粒子均匀分布于镀层中,且团聚现象较少。当脉冲电流密度为7 A/dm2时,镀层的显微硬度高达842.9 Hv。
채용맥충전침적방법,재압축궤벌편표면제비Ni-SiC도층。이용원자흡수분광광도계、투사전경화경도계연구맥충전류밀도대 Ni-SiC 도층 SiC 입자복합량、미관결구화현미경도적영향。결과표명,수착맥충전류밀도적증대,Ni-SiC 도층 SiC 입자적복합량선증가후략유강저。재맥충전류밀도위7 A/dm2시,도층SiC입자적복합량고체9.92%(질량분수)。맥충전류밀도위7 A/dm2시,도층치밀、정립세소,SiC 입자균균분포우도층중,차단취현상교소。당맥충전류밀도위7 A/dm2시,도층적현미경도고체842.9 Hv。
Ni-SiC coatings were synthesized on the surface of compressor valves by using pulse electrodeposition method.The effect of current density on the content,microstructure and microhardness of the coatings was in-vestigated by using the atomic absorption spectrophotometer,transmission electron microscope and microhard-ness tester.The results show that the SiC particle content in the coating increases first and then decreases with the increase of pulse current density.The current density was 7 A/dm2 ,the coating has a density and fine structure,and SiC particles are evenly distributed in this coating.The current density was 7 A/dm2 ,the micro-hardness of the coating reaches 842.9 Hv.