CeO_2对Ni-Al复合镀层950℃恒温氧化性能的影响(英文)  

Effect of CeO_2 on the Isothermal Oxidation of Electrodeposited Ni-Al Composite Coatings at 950°C

作　　者：陈洪玉[1] 张海军[1] 孙俭峰[1] 钱兵羽[1] 

机构地区：[1]黑龙江科技大学,黑龙江哈尔滨150022

出　　处：《稀有金属材料与工程》2015年第3期571-575,共5页Rare Metal Materials and Engineering

基　　金：Scientific Research Fund of Heilongjiang Provincial Education Department(11531319)

摘　　要：采用微米Al和纳米Ce O2颗粒与Ni复合的方法在Ni基上制备了3种不同Al含量的Ni-Al-Ce O2复合镀层,作为对比采用相同的工艺制备了不含纳米CeO 2颗粒的Al含量相当的Ni-Al复合镀层。微米Al颗粒尺寸范围为1~5m,纳米Ce O2颗粒平均尺寸为10 nm。SEM/EDAX和TEM分析结果表明,纳米CeO 2颗粒的添加细化了基体Ni的晶粒。950℃下恒温氧化实验结果表明：在相同的Al颗粒含量条件下,不管Ni-Al复合镀层是形成NiO还是Al2O3氧化膜,纳米CeO 2颗粒的加入都提高了Ni-Al镀层的抗氧化性能。同时对Ce O2影响Ni-Al复合镀层的氧化性能进行了详细的分析。Electrodeposited Ni-Al and three sorts of Ni-Al-Ce O2 composite coatings with different contents of Al were prepared by co-deposition of Ni matrix with Al microparticles and/or CeO 2 nanoparticles. The Al microparticles were in a size range of 1~5 m,and the Ce O2 nanoparticles in an average size of 10 nm. SEM/EDAX and TEM results indicate that CeO 2 addition can refine the Ni-Al composite. Oxidation at 950 °C indicates that the addition of CeO 2 improve the oxidation resistance at a suitable amount of Al particles in such composites, no matter whether the Ni-Al composite forms NiO or Al2O3 scale. The effect of CeO 2 on the oxidation behavior of the electrodeposited Ni-Al composite coatings was discussed.

关 键 词：共沉积 氧化 活性元素效应 

分 类 号：TG174.4[金属学及工艺—金属表面处理]