摘要
通过Ni、W、P和CeO2、SiO2纳米颗粒的脉冲共沉积,在碳钢基体表面制备出了Ni-W-P-CeO2-SiO2纳米复合薄膜材料,研究了电解液中硫酸镍和柠檬酸浓度对纳米复合薄膜化学组成、沉积速率、显微硬度和微观组织的影响。结果表明:当硫酸镍和柠檬酸浓度分别控制在70g/L和120g/L时,纳米复合薄膜材料沉积速率(25.32μm/h)和显微硬度(6140MPa)最高。增加硫酸镍浓度,纳米复合薄膜材料晶粒得到细化,但基质金属晶粒轮廓模糊,纳米颗粒在基质金属中分布不均匀。在适宜的柠檬酸浓度(120g/L)下,纳米复合薄膜材料表面平整光滑、结构致密、晶粒细小,基质金属晶粒轮廓清晰,呈规则圆球型,CeO2纳米颗粒在基质金属中镶嵌均匀,但SiO2纳米颗粒沉积量较少且分布不均匀。
Ni-W-P-CeO2-SiO2 nano-composite films were prepared on the carbon steel surface by pulse co-deposition of nickel, tungsten, phosphorus, nano-CeO2 and nano-SiO2 particles, and the influence of nickel salt and citric acid concentrations in electrolyte on chemical composition, microhardness and microstructure of nano-composite films was researched. The results indicate that when nickel salt and citric acid concentrations in electrolyte are controlled at 70 g/L and 120 g/L respectively, the deposition rate with 25.32 μm/h and microhardness with 6140 MPa of the nano-composite films are highest. An increase in nickel salt concentration leads to refinement in grain structure, but the outline of matrix metal crystallite is fuzzy and the distribution of nano particles within matrix metal is not even. The nano-composite films obtained under suitable citric acid concentration （120 g/L） possess smooth surface, compact microstructurc, fine crystal size and clear outline of spherical matrix metal crystallite. Meanwhile the nano-CeO2 particle is dispersed evenly within matrix metal, while nano-SiO2 particle in deposition amount is less and the distribution is still not even.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2008年第10期1809-1814,共6页
Rare Metal Materials and Engineering
基金
国家自然科学基金(20806035)
云南省应用基础研究计划(2007E187M)
云南省教育厅科学研究基金(08C0025)
昆明理工大学分析测试基金(2008-003)项目资助
关键词
纳米复合薄膜
显微硬度
微观组织
nano-composite films
microhardness
microstructure
