摘要
利用Y_2O_3或CeO_2纳米颗粒替代部分Al_2O_3粉作为填充剂,在Ni基体上,于600℃低温渗铝10 h,制备了2种稀土氧化物改性的低温渗铝涂层。作为对比,采用相同的工艺在Ni基体上利用纯Al_2O_3粉制备了普通渗铝涂层。1000℃下恒温氧化结果表明:Y_2O_3通过抑制θ-Al_2O_3的长大提高涂层的抗氧化性能,而CeO_2则通过促进θ-Al_2O_3向α-Al_2O_3的相变明显提高其抗氧化性能。文中对Y_2O_3或CeO_2是如何影响渗铝涂层的氧化性能进行了分析。
Two aluminide coatings were produced on Ni substrate via a conventional pack-cementation at 600 ℃ for 10 h using Y2O3 or CeO2 particles instead of part of Al2O3 as filler.For comparison,aluminizing was also performed under the same condition using pure Al2O3 as filler.The results of isothermal-oxidation at 1000 ℃ indicate that Y2O3 can suppress the growth of θ-alumina and improve the oxidation resistance,while CeO2 accelerates the θ to α-alumina transformation and significantly improves the oxidation resistance.Besides,the effects of Y2O3 or CeO2 filler on the coating oxidation behavior were discussed.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2015年第11期2628-2632,共5页
Rare Metal Materials and Engineering
基金
Scientific Research Fund of Heilongjiang Provincial Education Department(11531319)
关键词
铝化物
氧化
活性元素效应
aluminide
oxidation
reactive element effect
