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研究了机械合金化合成的Fe-Al-Ti-B四元粉体在800-1100℃等温热处理过程中的结构演变及晶粒生长动力学,讨论了晶粒生长机制.研究表明,采用机械合金化加后续热处理工艺可以合成原位TiB2/Fe3Al基纳米复合材料粉体.球磨80h的Fe-Al-Ti-B四元粉体在热处理过程中Fe(Al,Ti,B)分解形成纳米晶DO3-Fe3Al及TiB2两个组成相.随热处理温度的升高,Fe3Al晶粒生长由主要受晶界扩散控制过渡到主要受晶格扩散控制.在热处理过程中,Fe3Al晶粒生长的动力学方程为:K=1.5×10-5exp(-578.7×103/RT),晶粒生长受到明显的抑制,原位TiB2/Fe3Al基纳米复合材料粉体的热稳定性高.

参考文献

[1] Oleszak D.;Matyja H. .Formation of Nanocrystalline FeAI-NbC and FeAI-VC Composites by Mechanical Alloying[J].Materials Science Forum,2000(Pt.1):320-325.
[2] Park B-G.;Ko .In Situ Formation of TiC and TiB_2 in the Fe_3All Matrix by MA-PDS Process[J].粉体ぉょび粉末冶金,2000(10):1080-1084.
[3] Ko SH.;Park BG.;Hashimoto H.;Abe T.;Park YH. .Effect of MA on microstructure and synthesis path of in-situ TiC reinforced Fe-28at.% Al intermetallic composites[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2002(0):78-83.
[4] 汤文明,郑治祥,唐红军,吴玉程,任榕,汤志鸣.原位TiB2/Fe3Al基纳米复合材料的合成及其晶粒生长动力学(Ⅰ)--Fe-Al-Ti-B四元粉体的机械合金化[J].材料热处理学报,2006(03):45-49.
[5] Groza JR .Nanosintering[J].Nanostructured Materials,1999(5/8):987-992.
[6] Kamara M;Uenishi K;Kobayashi K F .Nano-structured intermetallic compound TiAl obtained by crystallization of mechanically alloyed amorphous TiAl,and its subsequent grain growth[J].Journal of Materials Science,2000,35:2879-2905.
[7] B. S. Murty;S. Ranganathan .Novel materials synthesis by mechanical alloying/milling[J].International Materials Reviews,1998(3):101-141.
[8] Rrddy B V;Deevi S C .Processing of iron aluminides by pressureless sintering through Fe + Al elemental route[J].Materials Science and Engineering A,2002,325:163-176.
[9] Rabin B H;Wright R N .Synthesis of iron aluminides from elemental powders:reaction mechanisms and densification behavior[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1991,22:277-286.
[10] 申泮文;车云霞.无机化学丛书[M].北京:科学出版社,1998
[11] Lu L.;Wang LB.;Ding BZ.;Lu K.;Tao NR. .Grain growth and strain release in nanocrystalline copper[J].Journal of Applied Physics,2001(11 Pt.1):6408-6414.
[12] Malow T R;Koch C C .Grain growth in nanocrystlline iron prepared by mechanical attrition[J].Acta Materialia,1997,45(05):2177-2186.
[13] Mehrer H;Eggersmann M;Gude A .Diffusion in intermetallic phases of the Fe-Al and Fe-Si systems[J].Materials Science and Engineering A,1997,239/240:889-898.
[14] Huang B.;Lavernia EJ.;Perez RJ. .Grain growth of nanocrystalline Fe-Al alloys produced by cryomilling in liquid argon and nitrogen[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,1998(1/2):124-132.
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