(北京有色金屬研究總院 分析測試所，北京 100088)
摘 要: 研究了涂層與基體界面結(jié)合能的測定方法，用理論和實驗技術(shù)分析了努氏界面印痕法加載過程中，膜基試樣吸收外加能量而轉(zhuǎn)化為塑性變形能的行為、以及表面形狀改變能和涂層界面斷裂表面能，建立了努氏界面印痕能量法。對鐵基Ni/Fe、鎳基Cu/Ni低壓等離子噴涂涂層進行界面結(jié)合強度的研究和分析得到涂層界面的斷裂表面能。鐵基純鎳Ni/Fe涂層界面的斷裂表面能比鎳基銅Cu/Ni涂層的高。界面微觀分析表明：鎳基銅Cu/Ni涂層材料疏松，膜基界面存在較多裂紋，涂層和基體中觀察不到元素擴散層。Ni/Fe涂層界面結(jié)合致密，約有2μm的元素擴散層，微觀分析現(xiàn)象與界面結(jié)合能的測定結(jié)果吻合。
關(guān)鍵字: 涂層；斷裂表面能；努氏界面印痕
coating and substrate for
low-pressure plasma sprayed
materials
YAO Wei, LI Dong-fei
（General Ressarch Institute for Nonferrous Metals,
Beijing 100088， China）
Abstract:The Interfacial bonding energy between coating and substrate for lowplasma sprayed materials was analyzed by theory and experiment. The plastic deformation energy, superficies modification energy and interfacial fracture surface energy consumed by samples during interfacial indentation experiment were determined by Knoop interfacial indentation method. Knoop interfacial indentation energy testing method was newly established. The interfacial fracture surface energy was obtained through research on interfacial bonding energy between coating and substrate for low-plasma sprayed Fe-based Ni/Fe and Cu-based Cu/Ni materials. Microanalysis for interface shows that the coating of Ni-based Cu/Ni material is porous and there exist many cracks at the interface between coating and substrate, moreover, no element diffusion layer is found in the coating and substrate. The bonding between the coating and substrate for Ni/Fe material is dense and there is an element diffusion layer with the thickness of about 2～3μm.
Key words: coating; fracture surface energy; Knoop interfacial indentation
