离子束增强沉积制备Al、Al－Y薄膜改善304不锈钢抗氧化性能的研究

SYNTHESIS OF AL AND AL-Y FILMS BY IBED TO IMPROVE THE OXIDATION-RESISTANCE OF 304 STAINLESS STEEL LIHUALONG HUANG YUANWEI ZHANG YUNSRU

用离子束增强沉积的方法，在３０４不锈钢表面合成了Ａｌ及Ａｌ－Ｙ薄膜．通过在９５０℃、１０５０℃的恒温氧化和９５０℃的循环氧化实验发现，由于Ａｌ＿２Ｏ＿３保护膜的生成显著提高了３０４不锈钢的抗氧化性，而Ｙ的加入又明显地提高了Ａｌ＿２Ｏ＿３氧化膜的抗循环氧化能力．本文通过ＳＥＭ、ＡＥＳ、ＥＰＭＡ及Ｘ射线衍射相分析等手段，分析了氧化产物层的形貌和组成．并根据实验结果探讨了Ａｌ、Ｙ有益作用的机制．

Al and Al-Y films were synthesized on the surface of 304 stainless steel byion-beam-enhanced deposition(IBED).The isothermal oxidation behavior of theAl and Al-Y deposited 304 stainless steel was studied in air at 950℃and 1050℃,and their cylcling oxidation behavior was studied in air at 950℃.The experi-mental results indicated that the synthesized films enhanced remarkably theoxidation-resistance of the 3O4 stainless steel,and that the addition of Yimproved further the eycling oxidation-resistance of the steel.SEM,AES,EPMA,and X-ray diffractions were employed tO characterize the oxidation products.Onthe basis of the results,the beneficial effects of Al,and in particular,of Y werebriefly discussed.