(福州大學(xué) 材料科學(xué)與工程學(xué)院，福州 350108)
摘 要: 采用可溶性Ni陽極電刷鍍方法制備納米晶Ni-Fe合金鍍層，利用XRD、SEM、TEM、顯微硬度計等測試方法分析低溫退火對鍍層結(jié)構(gòu)和性能的影響。結(jié)果表明：納米晶Ni-Fe合金鍍層的硬度隨退火溫度的升高而提高，在200 ℃時達(dá)到最大值，存在明顯的退火再強(qiáng)化；繼續(xù)提高退火溫度導(dǎo)致鍍層硬度降低；400 ℃退火后的鍍層硬度與鍍態(tài)的接近；納米晶Ni-Fe合金鍍層退火過程沒有出現(xiàn)晶粒異常長大，表現(xiàn)出比純Ni鍍層更高的熱穩(wěn)定性。
關(guān)鍵字: 電刷鍍；Ni-Fe合金鍍層；退火再強(qiáng)化；熱穩(wěn)定性
（College of Materials Science and Engineering, Fuzhou University, Fuzhou 350002, China）
Abstract: Nanocrystalline Ni-Fe alloy coatings were synthesized by brush plating using soluble anode. Microhardness test and techniques of XRD, SEM and TEM were applied to characterize the microstructures and mechanical properties of Ni-Fe alloy coatings. The results show that the microhardness of Ni-Fe alloy coatings increases with increasing annealing temperature and reaches a peak value at 200 ℃, showing a significant hardening during annealing. With further increasing annealing temperature, the microhardness decreases gradually, but the microhardness of the coating after being annealed at 400 ℃ is still as high as that of the as-deposited sample. The abnormal grain growth is not observed during annealing of Ni-Fe alloy coatings, which indicates a better thermal stability.
Key words: brush plating; Ni-Fe alloy coating; annealing hardening; thermal stability
