Development of Ni–Fe–Al-based alloys precipitating cubic γ′ for fabrication of nanoporous membranes
Development of Ni–Fe–Al-based alloys precipitating cubic γ′ for fabrication of nanoporous membranes
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开发用于制备纳米多孔膜的 NiâFeâAl 基合金沉淀立方 γâ²
DOI：
10.1007/s10853-013-7212-1
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发表时间：
2013
影响因子：
4.5
通讯作者：
F. Stahl
中科院分区：
文献类型：
--
作者：
M. Necker;J. Rösler;F. Stahl
在本研究中，开发了新的镍基合金沉淀立方γ′，这将用于生产多晶纳米多孔膜。通过冷轧和热处理相结合的方法制备多晶纳米多孔膜，以使γ′相定向粗化，然后选择性溶解。常规的Ni基超合金具有带有立方γ′-沉淀物的γ/γ′ -微观结构，并且显示出所需的蚀刻行为，但是它们在室温下的高强度和有限的延展性不允许通过前述方法生产多晶纳米多孔膜。因此，开发了具有γ/γ′显微组织的成分更简单的新合金。由Schmitz（Cullivier，ISBN 978-3-86955-523-2，16）生产的合金Ni-13 Fe-8Al-4 Ti（以原子百分比计的组成）用作基础并且显示出有希望的特性。为了获得立方γ′-沉淀物，估计错配至少为|0.2|%，通过三岛（Acta Metall 33：1161-1169，23）提出的方法。此外，通过Thermocalc®模拟（数据库：TTNi 7）计算γ-基质和γ′-相的相组成以及相体积分数。通过添加铬和钼来钝化γ基体，从而使γ′沉淀物在浸出过程中溶解，从而调节新合金的蚀刻行为。铌部分取代钛后，获得了定向排列的立方γ′相。此外，通过减少合金元素，与常规超合金相比，硬度可以显著降低。因此，发现有前途的合金在冷轧和热处理的组合过程中获得γ′-析出相的定向粗化。
During this study, new Ni-base alloys precipitating cubicγ′ were developed which shall be used for the production of polycrystalline nanoporous membranes. The polycrystalline nanoporous membranes are produced through a combination of cold rolling and heat treatment in order to get directional coarsening of theγ′-phase which is selectively dissolved afterwards. Conventional Ni-based superalloys have aγ/γ′ -microstructure with cubicγ′-precipitates and show the needed etching behaviour but their high strength and limited ductility at room temperature do not allow to produce the polycrystalline nanoporous membranes by means of the before mentioned method. Thus, the new alloys with simpler composition were developed which have aγ/γ′ microstructure. The alloy Ni–13Fe–8Al–4Ti (composition in atomic percent) which was produced by Schmitz (Cullivier, ISBN 978-3-86955-523-2, 16) served as basis and showed the promising characteristics. To obtain cubicγ′-precipitates, the misfit was estimated to values of at least |0.2| % by a method presented by Mishima (Acta Metall 33:1161–1169, 23). Further, the phase compositions as well as phase volume fractions ofγ-matrix andγ′-phase were calculated by means of Thermocalc®simulations (database: TTNi7). The etching behaviour of the new alloys was adjusted by adding chromium and molybdenum which passivate theγ-matrix so that theγ′-precipitates dissolve during the leaching process. The well-aligned cubicγ′-precipitates were obtained by partially replacing titanium by niobium. Furthermore, the hardness could be significantly lowered compared to conventional superalloys by reduction of alloying elements. Hence, the promising alloys were found to get directional coarsening of theγ′-precipitates in a combined process of cold rolling and heat treatment.
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用于制造亚微米尺寸部件的金属纳米物体的锻造
DOI：
--
发表时间：
2007
期刊：
影响因子：
--
作者：
J. Rösler;D. Mukherji;K. Schock;S. Kleindiek
通讯作者：
S. Kleindiek
DOI：
--
发表时间：
2004
期刊：
影响因子：
--
作者：
J. Rösler;O. Nath;F. Schmitz;D. Mukherji
通讯作者：
D. Mukherji
影响因子：
3.6
作者：
Rösler, J;Mukherji, D
通讯作者：
Mukherji, D
通过锻造 Ni 3 Al-纳米颗粒制造金属纳米组件。
DOI：
--
发表时间：
2012
期刊：
影响因子：
--
作者：
Landefeld Andreas;R. Joachim
通讯作者：
R. Joachim
影响因子：
--
作者：
Schmitz, Fabian;Roesler, Joachim
通讯作者：
Roesler, Joachim