河南科学
河南科學
하남과학
HENAN SCIENCE
2013年
7期
980-983
,共4页
纳米晶镍涂层%低碳钢基体%界面扩散%晶粒长大
納米晶鎳塗層%低碳鋼基體%界麵擴散%晶粒長大
납미정얼도층%저탄강기체%계면확산%정립장대
nanocrystalline nickel coatings%mild steel substrate%interface diffusion%grain growth
在不同温度下（150～500℃）对电沉积纳米晶镍涂层与低碳钢基体进行低温扩散退火热处理。用X-ray衍射考察了退火温度对涂层微观结构的影响；利用扫描电子显微镜（SEM）的背散射电子（BSE）像及附带的能量色散谱（EDS）观察了涂层与基体界面上的相结构及扩散过渡层的形成。结果表明，涂层在300℃以上开始有较明显的晶粒长大发生，同时涂层织构发生转变。在250～500℃范围进行低温扩散退火可以有效促使纳米晶镍涂层与基体界面上原子的扩散，形成扩散过渡层，同时控制涂层晶粒不过分长大。
在不同溫度下（150～500℃）對電沉積納米晶鎳塗層與低碳鋼基體進行低溫擴散退火熱處理。用X-ray衍射攷察瞭退火溫度對塗層微觀結構的影響；利用掃描電子顯微鏡（SEM）的揹散射電子（BSE）像及附帶的能量色散譜（EDS）觀察瞭塗層與基體界麵上的相結構及擴散過渡層的形成。結果錶明，塗層在300℃以上開始有較明顯的晶粒長大髮生，同時塗層織構髮生轉變。在250～500℃範圍進行低溫擴散退火可以有效促使納米晶鎳塗層與基體界麵上原子的擴散，形成擴散過渡層，同時控製塗層晶粒不過分長大。
재불동온도하（150～500℃）대전침적납미정얼도층여저탄강기체진행저온확산퇴화열처리。용X-ray연사고찰료퇴화온도대도층미관결구적영향；이용소묘전자현미경（SEM）적배산사전자（BSE）상급부대적능량색산보（EDS）관찰료도층여기체계면상적상결구급확산과도층적형성。결과표명，도층재300℃이상개시유교명현적정립장대발생，동시도층직구발생전변。재250～500℃범위진행저온확산퇴화가이유효촉사납미정얼도층여기체계면상원자적확산，형성확산과도층，동시공제도층정립불과분장대。
Low temperature diffusion annealing with electrodeposited nanocrystalline nickel coatings and mild steel substrates were performed in the temperature range between 150 ℃ and 500 ℃. The influence of annealing temperature on the microstructure of Ni coatings was investigated by X-ray diffraction(XRD). The phase structure of interface between coating and substrate and the formation of transition layer on the interface were detected by backscattered electron(BSE) images and energy dispersive X-ray spectroscopy(EDS) attached to scanning electron microscope(SEM). The results show that an obvious grain growth and texture mutation occurred when temperature up to 300℃. Low temperature diffusion annealing between 250℃and 500℃secured effectively the atom diffusion and the formation of a transition layer on the interface. Moreover,excessive grain growth was restrained.
