Study on Morphological Stability of Interphase Boundary Formed by Diffusional Reaction

扩散反应形成的相界面的形态稳定性研究

• 批准号: 04452276
• 负责人: ISHIDA Kiyohito
• 金额: $ 4.48万
• 依托单位: TOHOKU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1993
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-04452276/
• 关键词: INTERFACE MORPHOLOGY; REACTION DIFFUSION; INTERFACE STABILITY; DIFFUSION COUPLE; DENDROTIC INTERFACE; PHASE DIAGRAM; DIFFUSION PATH; PHASE INTERFACE; Fe-C合金; α; γ界面; 部分平衡

The control of morphology of the interface between different phases is one of the key technology in producting composite materials. In the present work, the phase interfaces in Ti-X, Fe-C base and Ni-Al base systems have been studied from the viewpoints of both the experimental and thermodynamics.(1)alpha/beta interface in Ti-X system : In rge alpha/beta diffusion couples of Ti-X alloys, non planar interfaces were formed for Fe, Co and Ni. This result might due to high speed diffusion of these elements in alpha solid solution.(2)alpha/gamma interface in Fe-C-X system : The alpha/gamma interfaces formed by carburization in Fe-C-X (X : Ti, V, Nb, Ta, Cr, Mo, W, Co and Cr) alloys were stable, while non planar interfaces were observed for P, Al, Sb, Ni, Mn, Si and Ge. These results could be explained quantitatively by the concept of the local equilibrium.(3)Pseudo-interface in beta phase of Ni-Al base diffusion couples : In a single phase region of beta phase in the Ni-Al base couples, an interface which has a clear concentration drop was observed in the concentration profile. This is due to the anomalous variations in diffusion coeffecients in B2 structure arising from its composition dependent defect structure.

不同相界面形貌的控制是制备复合材料的关键技术之一。本文从实验和热力学两方面研究了Ti-X、Fe-C基和Ni-Al基体系的相界面。（1）Ti-X系中的α/β界面：在Ti-X合金的α/β扩散偶中，Fe、Co和Ni形成非平面界面。这一结果可能是由于这些元素在α固溶体中的高速扩散所致。（2）Fe-C-X体系中的α/γ界面：Fe-C-X（X：Ti，V，Nb，Ta，Cr，Mo，W，Co，Cr）合金中渗碳形成的α/γ界面比较稳定，而P，Al，Sb，Ni，Mn，Si，Ge合金中渗碳形成的α/γ界面为非平面界面。这些结果可以用局部平衡的概念定量地解释。（3）Ni-Al基扩散偶β相中的伪界面：在Ni-Al基扩散偶β相中的单相区，在浓度分布中观察到一个具有明显浓度降的界面。这是由于B_2结构中的成分依赖性缺陷结构引起的扩散系数的异常变化。

项目成果

M.Ichinose, F.Togashi, K.Ishida and T.Nishizawa: "Morphological Stability of gamma/alpha Interface Formed by Carburization in Fe-C-X Alloys" Metallurgical Transactions A. vol.25A. (1994)

M.Ichinose、F.Togashi、K.Ishida 和 T.Nishizawa：“Fe-C-X 合金中渗碳形成的 γ/α 界面的形态稳定性”Metallurgical Transactions A. vol.25A。

M.Ichinose: "Morphological Stability of γ/α Interface Formed by Carburization in Fe-C-X Alloys" Metallurgical Transactions. (発表予定).

M.Ichinose：“Fe-C-X 合金中渗碳形成的 γ/α 界面的形态稳定性”冶金学报（即将发表）。

M.Ichinose: "Morphological stability of α/γ Interface Formed by Carburization in Fe-C-X Alloys" Metallurgical Transactions,A,. 24A. (1993)

M.Ichinose：“Fe-C-X 合金中渗碳形成的 α/γ 界面的形态稳定性”Metallurgical Transactions，A，(1993)。

M.Ichinose: "Morphological Stability of γ/α Interface Formed by Carburization" Metallurgical Transactions. (発表予定).

M.Ichinose：“渗碳形成的 γ/α 界面的形态稳定性”冶金学报（待提交）。

R.Kainuma: "Morphological Stability of α/β Interface in Ti-X Diffusion Couples" Metallurgical Transactions. (発表予定).

R. Kainuma：“Ti-X 扩散偶中 α/β 界面的形态稳定性”冶金学报（待提交）。