中文摘要：

脉冲电沉积制备了Ni,Ni-P,Ni-W-P合金薄膜和Ni-W-P/CeO2-SiO2纳米复合薄膜,研究了薄膜材料的高温氧化动力学特征。结果表明：在100～800℃范围内氧化1h时,纳米复合薄膜氧化增重率与氧化温度的氧化动力学曲线近似符合抛物线的递增规律;在300℃下氧化1～5h时,氧化增重率与氧化时间的氧化动力学曲线近似符合直线的递增规律;氧化温度低于400℃时,纳米复合薄膜的基质金属晶粒长大不明显;氧化温度提高到800℃时,纳米复合薄膜表面的氧化膜连续致密,没有裂纹、剥离和脱落,而Ni-W-P合金薄膜表面的氧化膜已变得疏松,甚至产生了微裂纹和针孔;CeO2和SiO2纳米颗粒在Ni-W-P基质金属中的嵌入,在提高纳米复合薄膜组织结构致密性的同时,也明显提高了抗高温氧化性能。

英文摘要：

Ni,Ni-P,Ni-W-P alloy films and Ni-W-P/CeO2-SiO2 nano-composite films were prepared by pulse electrodeposition,the high temperature oxidation kinetics characterization of the films was studied.The results show when oxidation temperature and time are controlled at 100～800℃ and 1h,respectively,the oxidation kinetics curve of oxidation mass gain rate and oxidation temperature accords with parabola law approximately for the nano-composipe films.While when oxidation temperature and oxidation time are controlled at 300℃ and 1 ～ 5h, respectively, the kinetics curve of oxidation mass gain rate and oxidation time for the films accords with linear law approximately. When oxidation temperature is lower than 400℃, the crystallites of the nano-composite films do not grow up obviously. When oxidation temperature increases to 800℃, the surface oxidation films of the nano-composite films are still continuous and compact, and no cracks, and exfoliation is observed in the films, but those of Ni-W-P alloy films have become loose and porous, even some micro-cracks form. Compared with the alloy films, Ce02 and SiO2 nano-particles embedded into Ni-W-P metal matrix improve compactness and high temperature oxidation resistance of the nano-composite films.