欢迎登录材料期刊网

材料期刊网

高级检索

采用Fe/Al-Si扩散偶的方法,利用SEM-WDS,研究了550℃硅在Fe/Al固态扩散反应中对Fe2Al5生长动力学的影响.实验结果表明,铝中硅含量不超过1.5 wt%时,扩散层中只出现Fe2Al5相,其生长动力学符合抛物线关系,实验测定的铁和铝在Fe2Al5中的综合扩散系数(D)在含硅量(wt%)分别为0、0.5、1.0和1.5时,分别为3.46×10-15、2.61×10-15、1.28×10-15和0.86×10-15m2/s.随硅含量增加,其抑制Fe2Al5相生长速度的效果明显加强.当铝中Si含量为2%和3%时,首先出现Fe2Al5相.随扩散时间的延长,在Fe2Al5相靠近Al-Si的一侧依次出现了T1/T9和T5相,化合物层生长速度明显加快.由于部分硅以三元化合物的形式存在,导致硅的抑制作用下降.

参考文献

[1] Horton J;Borzillo A .Ferrous metal article coated with an Al-Zn alloy[P].US patent No.3343930,1967.
[2] Horton J;Borzillo A .Method of forming improved Zn-Al coating on ferrous surface[P].US patent No.3393089,1968.
[3] Townsend H .Twenty-five-year corrosion tests of 55% Al-Zn alloy coated steel sheet[J].Materials Performance,1993,32:68-70.
[4] 史良权.热镀铝锌合金钢板[J].世界钢铁,2003(03):4-11,15.
[5] Selverian J;Notis M;Marder A .The microstructure of 55 wt% Al-Zn-Si(Galvalume)hot dip coatings[J].Journal ofMaterialsEngineering,1987,9:133-140.
[6] Chen R;WiHis D .The behavior of silocon in the sofidification of Zn-55Al-1.6 Si coating on steel[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,2005,36(1-2):117-128.
[7] Dominic Phelan;Bao Jiang Xu;Rian Dippenaar .Formation of intermetallic phases on 55 wt.%Al-Zn-Si hot dip strip[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2006(1/2):144-149.
[8] Kwon S C;Lee J Y .Interdiffusion in Fe/Fe2Al5(η)and Fe2Al5(η)/Al couples[J].Metals and Technology,1981,23:373-375.
[9] 铁铝原子在金属间化合物形成的扩散[J].上海大学学报(自然科学版),1998(06):661.
[10] Masanori Kajihara .Quantitative Evaluation of Interdiffusion in Fe_2Al_5 during Reactive Diffusion in the Binary Fe-Al System[J].Materials transactions,2006(6):1480-1484.
[11] Vikas Jindal;V.C. Srivastava;Arpan Das .Reactive diffusion in the roll bonded iron-aluminum system[J].Materials Letters,2006(13/14):1758-1761.
[12] 钱卫江;顾文桂 .Si对热浸镀Al界面化合物层生长的限制作用[J].金属学报,1994,30(09):403-406.
[13] Ghosh G .Aluminium-iron-silicon[J].Landolt-Bornstein New Series,2005,4:359-409.
[14] V. Buscaglia;U. Anselmi-Tamburini .On the diffusional growth of compounds with narrow homogeneity range in multiphase binary Systems[J].Acta materialia,2002(3):525-535.
[15] Yong Du;Julius Clemens Schuster;Zi-Kui Liu .A thermodynamic description of the Al-Fe-Si system over the whole composition and temperature ranges via a hybrid approach of CALPHAD and key experiments[J].Intermetallics,2008(4):554-570.
[16] Heumann T;Dittrich N .Structure character of the Fe2Al5 intermetallics compound in hot dip aluminizing process[J].Zeitschrift fur Metallkunde,1959,50:617-623.
上一张 下一张
上一张 下一张
计量
  • 下载量()
  • 访问量()
文章评分
  • 您的评分:
  • 1
    0%
  • 2
    0%
  • 3
    0%
  • 4
    0%
  • 5
    0%