摘要
用Y2O3粉粒代替传统的Al2O3作为分散剂,对Ti-6Al-4V合金进行低活度外扩散粉末渗铝处理,研究其在873K空气中的氧化行为。利用XRD和SEM对涂层表面形貌、相组成及断面组织结构进行分析。结果表明,渗铝后的钛合金表面由AlTi3和夹嵌其中的Y2O3颗粒组成,在循环氧化试验过程中,提高了氧化膜的粘附性,降低了合金的氧化速率并改变了合金的氧化机制,使由高温氧化时的双向扩散转变为氧向内扩散为主。
This paper presents the Y 2 O 3 powder as a dispersant substituting for traditional Al 2 O 3 ,and investigation of oxidation behavior at873K in the atmosphere by taking the treatment of low activity diffusion-to-outside powder aluminizing.Some analysis on painting surface appearance,phase composition and cross-sectional structure also have been carried out by taking XRD and SEM.The results show that the surface composition of Ti alloy-- - AlTi 3 and Y 2 O 3 which is within AlTi 3 ,improve oxidation films 'adhesive performance and decrease alloy oxidation rates,change the mechanism of alloy oxidation during cycle oxidation testing.And also shows oxidation diffusion from two sides to inner diffusion.
出处
《汽车工艺与材料》
2004年第7期67-70,共4页
Automobile Technology & Material
基金
吉林省自然科学基金资助(No.22020628-1)
关键词
渗铝涂层
高温氧化
aluminizing coating
high temperature oxidation
